From Wikipedia, the free encyclopedia
83 Ursae Majoris

A light curve for IQ Ursae Majoris, plotted from Hipparcos data [1]
Observation data
Epoch J2000       Equinox J2000
Constellation Ursa Major
Right ascension 13h 40m 44.27335s [2]
Declination +54° 40′ 53.8891″ [2]
Apparent magnitude (V) 4.69 - 4.75 [3]
Characteristics
Spectral type M2 III [4]
B−V color index +1.630±0.006 [5]
Variable type SRb [3]
Astrometry
Radial velocity (Rv)−18.61±0.20 [6] km/s
Proper motion (μ) RA: −19.06 [2]  mas/ yr
Dec.: −10.56 [2]  mas/ yr
Parallax (π)6.23 ± 0.22  mas [2]
Distance520 ± 20  ly
(161 ± 6  pc)
Absolute magnitude (MV)−1.39 [5]
Details
Mass1.1 [7]  M
Radius80 [8]  R
Luminosity1,250 [9]  L
Surface gravity (log g)0.62 [7]  cgs
Temperature3,579 [7]  K
Metallicity [Fe/H]−0.07 [7]  dex
Other designations
83 UMa, IQ UMa, BD+55°1625, HD 119228, HIP 66738, HR 5154, SAO 28843 [10]
Database references
SIMBAD data

83 Ursae Majoris is a candidate binary star [11] system in the northern circumpolar constellation of Ursa Major. It is a semiregular variable star, and it has been given the variable star designation IQ Ursae Majoris. It ranges in brightness from apparent visual magnitude 4.69 to 4.75. [3] Percy and Au (1994) identified it as a small amplitude red variable with an irregular behavior, having a characteristic time scale of 20 days. [12] Based upon an annual parallax shift of 6.23±0.22  mas, [2] it is located roughly 520  light years from the Sun. The distance derived from its Gaia Early Data Release 3 parallax is 179 pc. [13] The system is moving closer with a heliocentric radial velocity of −18.6 [6] km/s.

The visible component is an evolved red giant with a stellar classification of M2 III. [4] It is a marginal barium star, showing an enhanced abundance of s-process elements in its outer atmosphere. This material may have been acquired during a previous mass transfer from a now white dwarf companion, or self-enriched by a dredge-up during the asymptotic giant branch process. [14]

References

  1. ^ "Hipparcos Tools Interactive Data Access". Hipparcos. ESA. Retrieved 8 December 2021.
  2. ^ a b c d e f van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv: 0708.1752, Bibcode: 2007A&A...474..653V, doi: 10.1051/0004-6361:20078357, S2CID  18759600.
  3. ^ a b c Samus, N. N.; et al. (2017), "General Catalogue of Variable Stars: Version GCVS 5.1", Astronomy Reports, 61 (1): 80–88, Bibcode: 2017ARep...61...80S, doi: 10.1134/S1063772917010085, S2CID  125853869.
  4. ^ a b Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", The Astrophysical Journal Supplement Series, 71: 245, Bibcode: 1989ApJS...71..245K, doi: 10.1086/191373, S2CID  123149047.
  5. ^ a b Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv: 1108.4971, Bibcode: 2012AstL...38..331A, doi: 10.1134/S1063773712050015, S2CID  119257644.
  6. ^ a b De Bruijne, J. H. J.; Eilers, A.-C. (2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: A61, arXiv: 1208.3048, Bibcode: 2012A&A...546A..61D, doi: 10.1051/0004-6361/201219219, S2CID  59451347.
  7. ^ a b c d Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevič, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M.; Minchev, I.; de Jong, R. S.; Antoja, T.; Ramos, P.; Steinmetz, M.; Enke, H. (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, ISSN  0004-6361.
  8. ^ Stassun, Keivan G.; et al. (2019-10-01), "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, hdl: 1721.1/124721, ISSN  0004-6256, S2CID  166227927.
  9. ^ Chandler, Colin Orion; McDonald, Iain; Kane, Stephen R. (2016), "The Catalog of Earth-Like Exoplanet Survey Targets (CELESTA): A Database of Habitable Zones Around Nearby Stars", The Astronomical Journal, 151 (3): 59, arXiv: 1510.05666, Bibcode: 2016AJ....151...59C, doi: 10.3847/0004-6256/151/3/59, S2CID  119246448.
  10. ^ "83 UMa". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-03-31.
  11. ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv: 0806.2878, Bibcode: 2008MNRAS.389..869E, doi: 10.1111/j.1365-2966.2008.13596.x, S2CID  14878976.
  12. ^ Percy, John R.; Au, Winnie (November 1994), "APT Observations of Small-Amplitude Red Variables", Information Bulletin on Variable Stars, 4114: 1, Bibcode: 1994IBVS.4114....1P.
  13. ^ Bailer-Jones, C. A. L.; Rybizki, J.; Fouesneau, M.; Demleitner, M.; Andrae, R. (2021), "Estimating Distances from Parallaxes. V. Geometric and Photogeometric Distances to 1.47 Billion Stars in Gaia Early Data Release 3", The Astronomical Journal, 161 (3): 147, arXiv: 2012.05220, Bibcode: 2021AJ....161..147B, doi: 10.3847/1538-3881/abd806, S2CID  228063812.
  14. ^ Gomez, A. E.; et al. (1997), "Absolute magnitudes and kinematics of barium stars", Astronomy and Astrophysics, 319: 881, Bibcode: 1997A&A...319..881G.

External links

From Wikipedia, the free encyclopedia
83 Ursae Majoris

A light curve for IQ Ursae Majoris, plotted from Hipparcos data [1]
Observation data
Epoch J2000       Equinox J2000
Constellation Ursa Major
Right ascension 13h 40m 44.27335s [2]
Declination +54° 40′ 53.8891″ [2]
Apparent magnitude (V) 4.69 - 4.75 [3]
Characteristics
Spectral type M2 III [4]
B−V color index +1.630±0.006 [5]
Variable type SRb [3]
Astrometry
Radial velocity (Rv)−18.61±0.20 [6] km/s
Proper motion (μ) RA: −19.06 [2]  mas/ yr
Dec.: −10.56 [2]  mas/ yr
Parallax (π)6.23 ± 0.22  mas [2]
Distance520 ± 20  ly
(161 ± 6  pc)
Absolute magnitude (MV)−1.39 [5]
Details
Mass1.1 [7]  M
Radius80 [8]  R
Luminosity1,250 [9]  L
Surface gravity (log g)0.62 [7]  cgs
Temperature3,579 [7]  K
Metallicity [Fe/H]−0.07 [7]  dex
Other designations
83 UMa, IQ UMa, BD+55°1625, HD 119228, HIP 66738, HR 5154, SAO 28843 [10]
Database references
SIMBAD data

83 Ursae Majoris is a candidate binary star [11] system in the northern circumpolar constellation of Ursa Major. It is a semiregular variable star, and it has been given the variable star designation IQ Ursae Majoris. It ranges in brightness from apparent visual magnitude 4.69 to 4.75. [3] Percy and Au (1994) identified it as a small amplitude red variable with an irregular behavior, having a characteristic time scale of 20 days. [12] Based upon an annual parallax shift of 6.23±0.22  mas, [2] it is located roughly 520  light years from the Sun. The distance derived from its Gaia Early Data Release 3 parallax is 179 pc. [13] The system is moving closer with a heliocentric radial velocity of −18.6 [6] km/s.

The visible component is an evolved red giant with a stellar classification of M2 III. [4] It is a marginal barium star, showing an enhanced abundance of s-process elements in its outer atmosphere. This material may have been acquired during a previous mass transfer from a now white dwarf companion, or self-enriched by a dredge-up during the asymptotic giant branch process. [14]

References

  1. ^ "Hipparcos Tools Interactive Data Access". Hipparcos. ESA. Retrieved 8 December 2021.
  2. ^ a b c d e f van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv: 0708.1752, Bibcode: 2007A&A...474..653V, doi: 10.1051/0004-6361:20078357, S2CID  18759600.
  3. ^ a b c Samus, N. N.; et al. (2017), "General Catalogue of Variable Stars: Version GCVS 5.1", Astronomy Reports, 61 (1): 80–88, Bibcode: 2017ARep...61...80S, doi: 10.1134/S1063772917010085, S2CID  125853869.
  4. ^ a b Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", The Astrophysical Journal Supplement Series, 71: 245, Bibcode: 1989ApJS...71..245K, doi: 10.1086/191373, S2CID  123149047.
  5. ^ a b Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv: 1108.4971, Bibcode: 2012AstL...38..331A, doi: 10.1134/S1063773712050015, S2CID  119257644.
  6. ^ a b De Bruijne, J. H. J.; Eilers, A.-C. (2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: A61, arXiv: 1208.3048, Bibcode: 2012A&A...546A..61D, doi: 10.1051/0004-6361/201219219, S2CID  59451347.
  7. ^ a b c d Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevič, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M.; Minchev, I.; de Jong, R. S.; Antoja, T.; Ramos, P.; Steinmetz, M.; Enke, H. (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, ISSN  0004-6361.
  8. ^ Stassun, Keivan G.; et al. (2019-10-01), "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, hdl: 1721.1/124721, ISSN  0004-6256, S2CID  166227927.
  9. ^ Chandler, Colin Orion; McDonald, Iain; Kane, Stephen R. (2016), "The Catalog of Earth-Like Exoplanet Survey Targets (CELESTA): A Database of Habitable Zones Around Nearby Stars", The Astronomical Journal, 151 (3): 59, arXiv: 1510.05666, Bibcode: 2016AJ....151...59C, doi: 10.3847/0004-6256/151/3/59, S2CID  119246448.
  10. ^ "83 UMa". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-03-31.
  11. ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv: 0806.2878, Bibcode: 2008MNRAS.389..869E, doi: 10.1111/j.1365-2966.2008.13596.x, S2CID  14878976.
  12. ^ Percy, John R.; Au, Winnie (November 1994), "APT Observations of Small-Amplitude Red Variables", Information Bulletin on Variable Stars, 4114: 1, Bibcode: 1994IBVS.4114....1P.
  13. ^ Bailer-Jones, C. A. L.; Rybizki, J.; Fouesneau, M.; Demleitner, M.; Andrae, R. (2021), "Estimating Distances from Parallaxes. V. Geometric and Photogeometric Distances to 1.47 Billion Stars in Gaia Early Data Release 3", The Astronomical Journal, 161 (3): 147, arXiv: 2012.05220, Bibcode: 2021AJ....161..147B, doi: 10.3847/1538-3881/abd806, S2CID  228063812.
  14. ^ Gomez, A. E.; et al. (1997), "Absolute magnitudes and kinematics of barium stars", Astronomy and Astrophysics, 319: 881, Bibcode: 1997A&A...319..881G.

External links


Videos

Youtube | Vimeo | Bing

Websites

Google | Yahoo | Bing

Encyclopedia

Google | Yahoo | Bing

Facebook