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41 Sextantis Information

41 Sextantis
Observation data
Epoch J2000.0       Equinox J2000.0 ( ICRS)
Constellation Sextans
Right ascension 10h 50m 18.05639s [1]
Declination −08° 53′ 51.9538″ [1]
Apparent magnitude (V) 5.79±0.01 [2]
Characteristics
Aa
Spectral type kA3 hA7V mA9 [3]
U−B color index +0.13 [4]
B−V color index +0.16 [4]
Ab
Spectral type F/G [5]
Astrometry
Radial velocity (Rv)−4.9±2.9 [6] km/s
Proper motion (μ) RA: −5.694  mas/ yr [1]
Dec.: −15.814  mas/ yr [1]
Parallax (π)10.5160 ± 0.0428  mas [1]
Distance310 ± 1  ly
(95.1 ± 0.4  pc)
Absolute magnitude (MV)+0.91 [7]
Orbit [5]
PrimaryAa
Period (P)6.1670  d
Eccentricity (e)0.014±0.006 [8]
Periastron epoch (T)2,453,690.7442±0.0011  JD
Argument of periastron (ω)
(secondary)		272±4 [8]°
Semi-amplitude (K1)
(primary)		46.67±0.04 km/s
Semi-amplitude (K2)
(secondary)		93.06±0.20 km/s
Details
Aa
Mass2.23 [9]  M☉
Radius3.10±0.16 [10]  R☉
Luminosity32.6±1.7 [11]  L☉
Surface gravity (log g)3.83+0.10
−0.07 [12]  cgs
Temperature7,759 [13]  K
Metallicity [Fe/H]−0.23 [14]  dex
Rotational velocity (v sin i)24 [5] km/s
Age698+128
−108 [13]  Myr
Ab
Mass1.05 [9]  M☉
Radius1.3±0.2 [5]  R☉
Luminosity1.8±0.5 [5]  L☉
Rotational velocity (v sin i)10 [5] km/s
Other designations
41 Sex, 74 G. Sextantis [15], BD−08°3018, FK5 1281, GC 14906, HD 93903, HIP 52980, HR 4237, SAO 137823, CCDM J10503-0853A, WDS J10503-0854A [16]
Database references
SIMBAD data

41 Sextantis (HD 93903; HR 4237; 74 G. Sextantis), or simply 41 Sex is a spectroscopic binary located in the equatorial constellation Sextans. It has an apparent magnitude of 5.79, [2] making it faintly visible to the naked eye under ideal conditions. The system is located relatively close at a distance of 310 light-years based on Gaia DR3 parallax measurements [1] and it is drifting closer with a heliocentric radial velocity of approximately −4.9  km/s. [6] At its current distance, 41 Sex's brightness is diminished by an interstellar extinction of 0.16 magnitudes [17] and it has an absolute magnitude of +0.91. [7]

The visible component has a stellar classification of kA3hA7VmA9, [3] indicating that it is an Am star with the calcium K-lines of an A3 star, the hydrogen lines and effective temperature of an A7 main-sequence star, and the metal lines of an A9 star. It has 2.23 times the mass of the Sun [9] and a slightly enlarged radius 3.10 times that of the Sun. [10] It radiates 32.6 times the luminosity of the Sun [11] from its photosphere at an effective temperature of 7,759  K, [13] giving it a white-hue when viewed in the night sky. 41 Sextantis Aa is metal-deficient with an iron abundance 58.9% that of the Sun [14] and it spins modestly with a projected rotational velocity of 24  km/s. [5]

The companion's spectrum is very weak compared to the primary, but it is said to be either a late F-type star or an early G-type star. [5] It has 105% the mass of the Sun [9] and 1.3 times the radius of the Sun. [5] It radiates 1.8 times the luminosity of the Sun from its photosphere. [5] It spins slowly with a projected rotational velocity of 10 km/s. [5]


References

  1. ^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211. Bibcode: 2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940. S2CID  244398875. Gaia DR3 record for this source at VizieR.
  2. ^ a b Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode: 2000A&A...355L..27H. ISSN  0004-6361. S2CID  17128864.
  3. ^ a b Abt, Helmut A.; Morrell, Nidia I. (July 1995). "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars". The Astrophysical Journal Supplement Series. 99: 135. Bibcode: 1995ApJS...99..135A. doi: 10.1086/192182. ISSN  0067-0049. S2CID  120495962.
  4. ^ a b Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99–110. Bibcode: 1966CoLPL...4...99J.
  5. ^ a b c d e f g h i j k Fekel, Francis C.; Williamson, Michael H. (November 1, 2010). "New Precision Orbits of Bright Double-lined Spectroscopic Binaries. V. The Am Stars HD 434 and 41 Sextantis". The Astronomical Journal. 140 (5): 1381–1390. Bibcode: 2010AJ....140.1381F. doi: 10.1088/0004-6256/140/5/1381. ISSN  0004-6256. S2CID  14261237.
  6. ^ a b Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35,495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv: 1606.08053. Bibcode: 2006AstL...32..759G. doi: 10.1134/S1063773706110065. eISSN  1562-6873. ISSN  1063-7737. S2CID  119231169.
  7. ^ a b Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv: 1108.4971. Bibcode: 2012AstL...38..331A. doi: 10.1134/S1063773712050015. eISSN  1562-6873. ISSN  1063-7737. S2CID  119257644.
  8. ^ a b Worek, Thaddeus F. (May 1998). "Concerning the Reported Phase‐modulated Changes in the Spectrum of 41 Sextantis". Publications of the Astronomical Society of the Pacific. 110 (747): 580–585. Bibcode: 1998PASP..110..580W. doi: 10.1086/316160. ISSN  0004-6280. S2CID  121074533.
  9. ^ a b c d Kraicheva, Z.; Popova, E.; Tutukov, A.; Yungelson, L. (July 1980). "Catalogue of physical parameters of spectroscopic binary stars". Bull. Inf. Centre Données Stellaires. 19: 71. Bibcode: 1980BICDS..19...71K. S2CID  118298938.
  10. ^ a b Kervella, P.; Thévenin, F.; Di Folco, E.; Ségransan, D. (April 8, 2004). "The angular sizes of dwarf stars and subgiants: Surface brightness relations calibrated by interferometry". Astronomy & Astrophysics. 426 (1): 297–307. arXiv: astro-ph/0404180. Bibcode: 2004A&A...426..297K. doi: 10.1051/0004-6361:20035930. eISSN  1432-0746. ISSN  0004-6361. S2CID  6077801.
  11. ^ a b McDonald, I.; Zijlstra, A. A.; Watson, R. A. (15 June 2017). "Fundamental parameters and infrared excesses of Tycho–Gaia stars". Monthly Notices of the Royal Astronomical Society. 471 (1): 770–791. arXiv: 1706.02208. Bibcode: 2017MNRAS.471..770M. doi: 10.1093/mnras/stx1433. eISSN  1365-2966. ISSN  0035-8711. S2CID  73594365.
  12. ^ Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv: 1905.10694. Bibcode: 2019AJ....158..138S. doi: 10.3847/1538-3881/ab3467. eISSN  1538-3881. hdl: 1721.1/124721. S2CID  166227927.
  13. ^ a b c Kunzli, M.; North, P. (February 1998). "Behaviour of calcium abundance in Am-Fm stars with evolution". Astronomy and Astrophysics. 330: 651-658. arXiv: astro-ph/9710223. Bibcode: 1998A&A...330..651K. doi: 10.48550/ARXIV.ASTRO-PH/9710223. S2CID  5679821.
  14. ^ a b Anders, F.; et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv: 1904.11302. Bibcode: 2019A&A...628A..94A. doi: 10.1051/0004-6361/201935765. eISSN  1432-0746. ISSN  0004-6361. S2CID  131780028.
  15. ^ Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas". Resultados del Observatorio Nacional Argentino. 1. Bibcode: 1879RNAO....1.....G.
  16. ^ "* 41 Sex". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved April 12, 2024.
  17. ^ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society. 472 (4): 3805–3820. arXiv: 1709.01160. Bibcode: 2017MNRAS.472.3805G. doi: 10.1093/mnras/stx2219. eISSN  1365-2966. ISSN  0035-8711. S2CID  118879856.
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HD 11928 Information

HD 11928
Observation data
Epoch J2000.0       Equinox J2000.0 ( ICRS)
Constellation Triangulum
Right ascension 01h 57m 43.74417s [1]
Declination +27° 48′ 15.7579″ [1]
Apparent magnitude (V) 5.84 - 5.85 [2]
Characteristics
Evolutionary stage AGB [3]
Spectral type M2 III [4]
B−V color index +1.60 [5]
Variable type suspected [2]
Astrometry
Radial velocity (Rv)−1.93±0.22 [6] km/s
Proper motion (μ) RA: +12.974  mas/ yr [1]
Dec.: 60.043  mas/ yr [1]
Parallax (π)6.1432 ± 0.1953  mas [1]
Distance530 ± 20  ly
(163 ± 5  pc)
Absolute magnitude (MV)+0.11 [7]
Details
Radius52.68 [8]  R☉
Luminosity485±17 [9]  L☉
Surface gravity (log g)1.024 [10]  cgs
Temperature3,656±72 [11]  K
Other designations
NSV 15408, AG+27°211, BD+27°310, GC 2357, HD 11928, HIP 9132, HR 564, SAO 75048 [12]
Database references
SIMBAD data

HD 11928 (HR 564; NSV 15408) is a solitary star located in the northern constellation Triangulum. It is faintly visible to the naked eye as a red-hued point of light with an apparent magnitude of 5.85. [13] Gaia DR3 parallax measurements imply a distance of 530 light-years and it is drifting closer with a heliocentric radial velocity of −1.93  km/s. [6] At its current distance, HD 11928's brightness is diminished by an interstellar extinction of 0.13 magnitudes [14] and it has an absolute magnitude of +0.11. [7]

HD 11928 has a stellar classification of M2 III, [4] indicating that is an evolved M-type giant star. It is currently an asymptotic giant branch star that is generating energy via the fusion of hydrogen and helium shells around an inert carbon core. At present it has expanded to 52.68 times the radius of the Sun [8] and it radiates 485 times the luminosity of the Sun [9] from its photosphere at an effective temperature of 3,656  K. [11]

References

  1. ^ a b c d Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211. Bibcode: 2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940. S2CID  244398875. Gaia DR3 record for this source at VizieR.
  2. ^ a b Samus', N. N.; Kazarovets, E. V.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (January 2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports. 61 (1): 80–88. Bibcode: 2017ARep...61...80S. doi: 10.1134/S1063772917010085. eISSN  1562-6881. ISSN  1063-7729. S2CID  125853869.
  3. ^ Eggen, Olin J. (July 1992). "Asymptotic giant branch stars near the sun". The Astronomical Journal. 104: 275. Bibcode: 1992AJ....104..275E. doi: 10.1086/116239. ISSN  0004-6256. S2CID  121672252.
  4. ^ a b Wilson, Ralph E.; Joy, Alfred H. (March 1950). "Radial Velocities of 2111 Stars". The Astrophysical Journal. 111: 221. Bibcode: 1950ApJ...111..221W. doi: 10.1086/145261. eISSN  1538-4357. ISSN  0004-637X. S2CID  122883647.
  5. ^ Haggkvist, L.; Oja, T. (1970). "Results of BV photometry 1969-70 (Uppsala refractor)". Private Communication. Bibcode: 1970Priv.........0H. S2CID  231475662.
  6. ^ a b Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (January 2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics. 430: 165. arXiv: astro-ph/0409579. Bibcode: 2005A&A...430..165F. doi: 10.1051/0004-6361:20041272. S2CID  17804304.
  7. ^ a b Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv: 1108.4971. Bibcode: 2012AstL...38..331A. doi: 10.1134/S1063773712050015. eISSN  1562-6873. ISSN  1063-7737. S2CID  119257644.
  8. ^ a b Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv: 1905.10694. Bibcode: 2019AJ....158..138S. doi: 10.3847/1538-3881/ab3467. eISSN  1538-3881. hdl: 1721.1/124721. S2CID  166227927.
  9. ^ a b Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv: 1804.09365. Bibcode: 2018A&A...616A...1G. doi: 10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  10. ^ McDonald, I.; Zijlstra, A. A.; Watson, R. A. (15 June 2017). "Fundamental parameters and infrared excesses of Tycho–Gaia stars". Monthly Notices of the Royal Astronomical Society. 471 (1): 770–791. arXiv: 1706.02208. Bibcode: 2017MNRAS.471..770M. doi: 10.1093/mnras/stx1433. eISSN  1365-2966. ISSN  0035-8711. S2CID  73594365.
  11. ^ a b van Belle, G. T.; Lane, B. F.; Thompson, R. R.; Boden, A. F.; Colavita, M. M.; Dumont, P. J.; Mobley, D. W.; Palmer, D.; Shao, M.; Vasisht, G. X.; Wallace, J. K.; Creech-Eakman, M. J.; Koresko, C. D.; Kulkarni, S. R.; Pan, X. P.; Gubler, J. (1999). "Radii and Effective Temperatures for G, K, and M Giants and Supergiants". The Astronomical Journal. 117 (1): 521–533. Bibcode: 1999AJ....117..521V. doi: 10.1086/300677. S2CID  18617983.
  12. ^ "HD 11928". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved May 11, 2024.
  13. ^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode: 2000A&A...355L..27H. ISSN  0004-6361. S2CID  17128864.
  14. ^ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society. 472 (4): 3805–3820. arXiv: 1709.01160. Bibcode: 2017MNRAS.472.3805G. doi: 10.1093/mnras/stx2219. eISSN  1365-2966. ISSN  0035-8711. S2CID  118879856.
Retrieved from " https://en.wikipedia.org/?title=User:400Weir/sandbox&oldid=1223980457"
From Wikipedia, the free encyclopedia

41 Sextantis Information

41 Sextantis
Observation data
Epoch J2000.0       Equinox J2000.0 ( ICRS)
Constellation Sextans
Right ascension 10h 50m 18.05639s [1]
Declination −08° 53′ 51.9538″ [1]
Apparent magnitude (V) 5.79±0.01 [2]
Characteristics
Aa
Spectral type kA3 hA7V mA9 [3]
U−B color index +0.13 [4]
B−V color index +0.16 [4]
Ab
Spectral type F/G [5]
Astrometry
Radial velocity (Rv)−4.9±2.9 [6] km/s
Proper motion (μ) RA: −5.694  mas/ yr [1]
Dec.: −15.814  mas/ yr [1]
Parallax (π)10.5160 ± 0.0428  mas [1]
Distance310 ± 1  ly
(95.1 ± 0.4  pc)
Absolute magnitude (MV)+0.91 [7]
Orbit [5]
PrimaryAa
Period (P)6.1670  d
Eccentricity (e)0.014±0.006 [8]
Periastron epoch (T)2,453,690.7442±0.0011  JD
Argument of periastron (ω)
(secondary)		272±4 [8]°
Semi-amplitude (K1)
(primary)		46.67±0.04 km/s
Semi-amplitude (K2)
(secondary)		93.06±0.20 km/s
Details
Aa
Mass2.23 [9]  M☉
Radius3.10±0.16 [10]  R☉
Luminosity32.6±1.7 [11]  L☉
Surface gravity (log g)3.83+0.10
−0.07 [12]  cgs
Temperature7,759 [13]  K
Metallicity [Fe/H]−0.23 [14]  dex
Rotational velocity (v sin i)24 [5] km/s
Age698+128
−108 [13]  Myr
Ab
Mass1.05 [9]  M☉
Radius1.3±0.2 [5]  R☉
Luminosity1.8±0.5 [5]  L☉
Rotational velocity (v sin i)10 [5] km/s
Other designations
41 Sex, 74 G. Sextantis [15], BD−08°3018, FK5 1281, GC 14906, HD 93903, HIP 52980, HR 4237, SAO 137823, CCDM J10503-0853A, WDS J10503-0854A [16]
Database references
SIMBAD data

41 Sextantis (HD 93903; HR 4237; 74 G. Sextantis), or simply 41 Sex is a spectroscopic binary located in the equatorial constellation Sextans. It has an apparent magnitude of 5.79, [2] making it faintly visible to the naked eye under ideal conditions. The system is located relatively close at a distance of 310 light-years based on Gaia DR3 parallax measurements [1] and it is drifting closer with a heliocentric radial velocity of approximately −4.9  km/s. [6] At its current distance, 41 Sex's brightness is diminished by an interstellar extinction of 0.16 magnitudes [17] and it has an absolute magnitude of +0.91. [7]

The visible component has a stellar classification of kA3hA7VmA9, [3] indicating that it is an Am star with the calcium K-lines of an A3 star, the hydrogen lines and effective temperature of an A7 main-sequence star, and the metal lines of an A9 star. It has 2.23 times the mass of the Sun [9] and a slightly enlarged radius 3.10 times that of the Sun. [10] It radiates 32.6 times the luminosity of the Sun [11] from its photosphere at an effective temperature of 7,759  K, [13] giving it a white-hue when viewed in the night sky. 41 Sextantis Aa is metal-deficient with an iron abundance 58.9% that of the Sun [14] and it spins modestly with a projected rotational velocity of 24  km/s. [5]

The companion's spectrum is very weak compared to the primary, but it is said to be either a late F-type star or an early G-type star. [5] It has 105% the mass of the Sun [9] and 1.3 times the radius of the Sun. [5] It radiates 1.8 times the luminosity of the Sun from its photosphere. [5] It spins slowly with a projected rotational velocity of 10 km/s. [5]


References

  1. ^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211. Bibcode: 2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940. S2CID  244398875. Gaia DR3 record for this source at VizieR.
  2. ^ a b Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode: 2000A&A...355L..27H. ISSN  0004-6361. S2CID  17128864.
  3. ^ a b Abt, Helmut A.; Morrell, Nidia I. (July 1995). "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars". The Astrophysical Journal Supplement Series. 99: 135. Bibcode: 1995ApJS...99..135A. doi: 10.1086/192182. ISSN  0067-0049. S2CID  120495962.
  4. ^ a b Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99–110. Bibcode: 1966CoLPL...4...99J.
  5. ^ a b c d e f g h i j k Fekel, Francis C.; Williamson, Michael H. (November 1, 2010). "New Precision Orbits of Bright Double-lined Spectroscopic Binaries. V. The Am Stars HD 434 and 41 Sextantis". The Astronomical Journal. 140 (5): 1381–1390. Bibcode: 2010AJ....140.1381F. doi: 10.1088/0004-6256/140/5/1381. ISSN  0004-6256. S2CID  14261237.
  6. ^ a b Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35,495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv: 1606.08053. Bibcode: 2006AstL...32..759G. doi: 10.1134/S1063773706110065. eISSN  1562-6873. ISSN  1063-7737. S2CID  119231169.
  7. ^ a b Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv: 1108.4971. Bibcode: 2012AstL...38..331A. doi: 10.1134/S1063773712050015. eISSN  1562-6873. ISSN  1063-7737. S2CID  119257644.
  8. ^ a b Worek, Thaddeus F. (May 1998). "Concerning the Reported Phase‐modulated Changes in the Spectrum of 41 Sextantis". Publications of the Astronomical Society of the Pacific. 110 (747): 580–585. Bibcode: 1998PASP..110..580W. doi: 10.1086/316160. ISSN  0004-6280. S2CID  121074533.
  9. ^ a b c d Kraicheva, Z.; Popova, E.; Tutukov, A.; Yungelson, L. (July 1980). "Catalogue of physical parameters of spectroscopic binary stars". Bull. Inf. Centre Données Stellaires. 19: 71. Bibcode: 1980BICDS..19...71K. S2CID  118298938.
  10. ^ a b Kervella, P.; Thévenin, F.; Di Folco, E.; Ségransan, D. (April 8, 2004). "The angular sizes of dwarf stars and subgiants: Surface brightness relations calibrated by interferometry". Astronomy & Astrophysics. 426 (1): 297–307. arXiv: astro-ph/0404180. Bibcode: 2004A&A...426..297K. doi: 10.1051/0004-6361:20035930. eISSN  1432-0746. ISSN  0004-6361. S2CID  6077801.
  11. ^ a b McDonald, I.; Zijlstra, A. A.; Watson, R. A. (15 June 2017). "Fundamental parameters and infrared excesses of Tycho–Gaia stars". Monthly Notices of the Royal Astronomical Society. 471 (1): 770–791. arXiv: 1706.02208. Bibcode: 2017MNRAS.471..770M. doi: 10.1093/mnras/stx1433. eISSN  1365-2966. ISSN  0035-8711. S2CID  73594365.
  12. ^ Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv: 1905.10694. Bibcode: 2019AJ....158..138S. doi: 10.3847/1538-3881/ab3467. eISSN  1538-3881. hdl: 1721.1/124721. S2CID  166227927.
  13. ^ a b c Kunzli, M.; North, P. (February 1998). "Behaviour of calcium abundance in Am-Fm stars with evolution". Astronomy and Astrophysics. 330: 651-658. arXiv: astro-ph/9710223. Bibcode: 1998A&A...330..651K. doi: 10.48550/ARXIV.ASTRO-PH/9710223. S2CID  5679821.
  14. ^ a b Anders, F.; et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv: 1904.11302. Bibcode: 2019A&A...628A..94A. doi: 10.1051/0004-6361/201935765. eISSN  1432-0746. ISSN  0004-6361. S2CID  131780028.
  15. ^ Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas". Resultados del Observatorio Nacional Argentino. 1. Bibcode: 1879RNAO....1.....G.
  16. ^ "* 41 Sex". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved April 12, 2024.
  17. ^ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society. 472 (4): 3805–3820. arXiv: 1709.01160. Bibcode: 2017MNRAS.472.3805G. doi: 10.1093/mnras/stx2219. eISSN  1365-2966. ISSN  0035-8711. S2CID  118879856.
Cite error: A list-defined reference named "Houk1999" is not used in the content (see the help page).


HD 11928 Information

HD 11928
Observation data
Epoch J2000.0       Equinox J2000.0 ( ICRS)
Constellation Triangulum
Right ascension 01h 57m 43.74417s [1]
Declination +27° 48′ 15.7579″ [1]
Apparent magnitude (V) 5.84 - 5.85 [2]
Characteristics
Evolutionary stage AGB [3]
Spectral type M2 III [4]
B−V color index +1.60 [5]
Variable type suspected [2]
Astrometry
Radial velocity (Rv)−1.93±0.22 [6] km/s
Proper motion (μ) RA: +12.974  mas/ yr [1]
Dec.: 60.043  mas/ yr [1]
Parallax (π)6.1432 ± 0.1953  mas [1]
Distance530 ± 20  ly
(163 ± 5  pc)
Absolute magnitude (MV)+0.11 [7]
Details
Radius52.68 [8]  R☉
Luminosity485±17 [9]  L☉
Surface gravity (log g)1.024 [10]  cgs
Temperature3,656±72 [11]  K
Other designations
NSV 15408, AG+27°211, BD+27°310, GC 2357, HD 11928, HIP 9132, HR 564, SAO 75048 [12]
Database references
SIMBAD data

HD 11928 (HR 564; NSV 15408) is a solitary star located in the northern constellation Triangulum. It is faintly visible to the naked eye as a red-hued point of light with an apparent magnitude of 5.85. [13] Gaia DR3 parallax measurements imply a distance of 530 light-years and it is drifting closer with a heliocentric radial velocity of −1.93  km/s. [6] At its current distance, HD 11928's brightness is diminished by an interstellar extinction of 0.13 magnitudes [14] and it has an absolute magnitude of +0.11. [7]

HD 11928 has a stellar classification of M2 III, [4] indicating that is an evolved M-type giant star. It is currently an asymptotic giant branch star that is generating energy via the fusion of hydrogen and helium shells around an inert carbon core. At present it has expanded to 52.68 times the radius of the Sun [8] and it radiates 485 times the luminosity of the Sun [9] from its photosphere at an effective temperature of 3,656  K. [11]

References

  1. ^ a b c d Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211. Bibcode: 2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940. S2CID  244398875. Gaia DR3 record for this source at VizieR.
  2. ^ a b Samus', N. N.; Kazarovets, E. V.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (January 2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports. 61 (1): 80–88. Bibcode: 2017ARep...61...80S. doi: 10.1134/S1063772917010085. eISSN  1562-6881. ISSN  1063-7729. S2CID  125853869.
  3. ^ Eggen, Olin J. (July 1992). "Asymptotic giant branch stars near the sun". The Astronomical Journal. 104: 275. Bibcode: 1992AJ....104..275E. doi: 10.1086/116239. ISSN  0004-6256. S2CID  121672252.
  4. ^ a b Wilson, Ralph E.; Joy, Alfred H. (March 1950). "Radial Velocities of 2111 Stars". The Astrophysical Journal. 111: 221. Bibcode: 1950ApJ...111..221W. doi: 10.1086/145261. eISSN  1538-4357. ISSN  0004-637X. S2CID  122883647.
  5. ^ Haggkvist, L.; Oja, T. (1970). "Results of BV photometry 1969-70 (Uppsala refractor)". Private Communication. Bibcode: 1970Priv.........0H. S2CID  231475662.
  6. ^ a b Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (January 2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics. 430: 165. arXiv: astro-ph/0409579. Bibcode: 2005A&A...430..165F. doi: 10.1051/0004-6361:20041272. S2CID  17804304.
  7. ^ a b Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv: 1108.4971. Bibcode: 2012AstL...38..331A. doi: 10.1134/S1063773712050015. eISSN  1562-6873. ISSN  1063-7737. S2CID  119257644.
  8. ^ a b Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv: 1905.10694. Bibcode: 2019AJ....158..138S. doi: 10.3847/1538-3881/ab3467. eISSN  1538-3881. hdl: 1721.1/124721. S2CID  166227927.
  9. ^ a b Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv: 1804.09365. Bibcode: 2018A&A...616A...1G. doi: 10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  10. ^ McDonald, I.; Zijlstra, A. A.; Watson, R. A. (15 June 2017). "Fundamental parameters and infrared excesses of Tycho–Gaia stars". Monthly Notices of the Royal Astronomical Society. 471 (1): 770–791. arXiv: 1706.02208. Bibcode: 2017MNRAS.471..770M. doi: 10.1093/mnras/stx1433. eISSN  1365-2966. ISSN  0035-8711. S2CID  73594365.
  11. ^ a b van Belle, G. T.; Lane, B. F.; Thompson, R. R.; Boden, A. F.; Colavita, M. M.; Dumont, P. J.; Mobley, D. W.; Palmer, D.; Shao, M.; Vasisht, G. X.; Wallace, J. K.; Creech-Eakman, M. J.; Koresko, C. D.; Kulkarni, S. R.; Pan, X. P.; Gubler, J. (1999). "Radii and Effective Temperatures for G, K, and M Giants and Supergiants". The Astronomical Journal. 117 (1): 521–533. Bibcode: 1999AJ....117..521V. doi: 10.1086/300677. S2CID  18617983.
  12. ^ "HD 11928". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved May 11, 2024.
  13. ^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode: 2000A&A...355L..27H. ISSN  0004-6361. S2CID  17128864.
  14. ^ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society. 472 (4): 3805–3820. arXiv: 1709.01160. Bibcode: 2017MNRAS.472.3805G. doi: 10.1093/mnras/stx2219. eISSN  1365-2966. ISSN  0035-8711. S2CID  118879856.
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