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S Muscae
Location of S Muscae (circled)
Observation data
Epoch J2000       Equinox J2000
Constellation Musca
Right ascension 12h 12m 47.01834s [1]
Declination −70° 09′ 06.4363″ [1]
Apparent magnitude (V) 6.394 [2] (5.89 - 6.49 [3])
Characteristics
Spectral type F6Ib (F6-G0 [3]) + B5V [4]
U−B color index +0.66 [5]
B−V color index +1.00 [5]
Variable type δ Cepheid [3]
Astrometry
Radial velocity (Rv)−1.91 [6] km/s
Proper motion (μ) RA: −7.79 [1]  mas/ yr
Dec.: −0.60 [1]  mas/ yr
Parallax (π)1.99 ± 0.84  mas [1]
Distance863 [2]  pc
Absolute magnitude (MV)−4.01 [7]
Orbit [7] [8]
Period (P)504.9 ± 0.07
Semi-major axis (a)794 AU
Eccentricity (e)0.08 ± 0.002
Inclination (i)32 ± 1°
Semi-amplitude (K1)
(primary)		14.7 ± 0.2 km/s
Details
Mass6.2 [7]  M☉
Radius65.1 [2]  R☉
Luminosity3,467 [7]  L☉
Metallicity+0.18 [9]
companion
Mass5.3 [7]  M☉
Temperature17,000 [10]  K
Other designations
S Mus, HR 4645, SAO 251791, CD−69°977, GSC 09231-00752, HD 106111, GC 16679, HIP 59551, AAVSO 1207-69
Database references
SIMBAD data

S Muscae is a classical (δ) Cepheid variable star in the constellation Musca about 2,600 light years away.

A light curve for S Muscae, plotted from TESS data [11]

S Muscae is a yellow supergiant ranging between spectral types F6Ib and G0Ib and magnitudes 5.89 to 6.49 over a period of 9.66 days. [3] It is a luminous star around six times as massive as the Sun and 65.1 times the radius of the Sun. It is a binary star with a blue-white main sequence star companion likely to be of spectral type B3V to B5V with a mass of just over five solar masses, [12] one of the hottest and brightest companions of a Cepheid known. The two stars orbit each other every 505 days. [13]

S Muscae has been found to lie within the faint star cluster ASCC 69. [14]

References

  1. ^ a b c d e 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.
  2. ^ a b c Moskalik, P.; Gorynya, N. A. (2005). "Mean Angular Diameters and Angular Diameter Amplitudes of Bright Cepheids". Acta Astronomica. 55: 247. arXiv: astro-ph/0507076. Bibcode: 2005AcA....55..247M.
  3. ^ a b c d Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode: 2009yCat....102025S.
  4. ^ Skiff, B. A. (2014). "VizieR Online Data Catalog: Catalogue of Stellar Spectral Classifications (Skiff, 2009-2014)". VizieR On-line Data Catalog: B/Mk. Originally Published in: Lowell Observatory (October 2014). 1. Bibcode: 2014yCat....1.2023S.
  5. ^ a b Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode: 2002yCat.2237....0D.
  6. ^ Pourbaix, D.; Tokovinin, A. A.; Batten, A. H.; Fekel, F. C.; Hartkopf, W. I.; Levato, H.; Morrell, N. I.; Torres, G.; Udry, S. (2004). "SB9: The ninth catalogue of spectroscopic binary orbits". Astronomy and Astrophysics. 424 (2): 727–732. arXiv: astro-ph/0406573. Bibcode: 2004A&A...424..727P. doi: 10.1051/0004-6361:20041213. S2CID  119387088.
  7. ^ a b c d e Remage Evans, Nancy; Bond, Howard E.; Schaefer, Gail H.; Mason, Brian D.; Karovska, Margarita; Tingle, Evan (2013). "Binary Cepheids: Separations and Mass Ratios in 5 M ⊙ Binaries". The Astronomical Journal. 146 (4): 93. arXiv: 1307.7123. Bibcode: 2013AJ....146...93E. doi: 10.1088/0004-6256/146/4/93. S2CID  34133110.
  8. ^ Petterson, O. K. L.; Cottrell, P. L.; Albrow, M. D. (2004). "The orbits of southern binary Cepheids". Monthly Notices of the Royal Astronomical Society. 350 (1): 95–112. Bibcode: 2004MNRAS.350...95P. doi: 10.1111/j.1365-2966.2004.07555.x.
  9. ^ Klagyivik, P.; Szabados, L. (2009). "Observational studies of Cepheid amplitudes. I. Period-amplitude relationships for Galactic Cepheids and interrelation of amplitudes". Astronomy and Astrophysics. 504 (3): 959. arXiv: 0908.3561. Bibcode: 2009A&A...504..959K. doi: 10.1051/0004-6361/200811464. S2CID  18283579.
  10. ^ Evans, Nancy Remage; Massa, Derck; Fullerton, Alexander; Sonneborn, George; Iping, Rosina (2006). "Cepheid Masses: FUSE Observations of S Muscae". The Astrophysical Journal. 647 (2): 1387–1392. arXiv: astro-ph/0607489. Bibcode: 2006ApJ...647.1387E. doi: 10.1086/505519. S2CID  119020617.
  11. ^ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 8 December 2021.
  12. ^ Bohm-Vitense, Erika; Remage Evans, Nancy; Carpenter, Kenneth; Beck-Winchatz, Bernhard; et al. (1997). "The Mass of the Classical Cepheid S Muscae". The Astrophysical Journal. 477 (2): 916. Bibcode: 1997ApJ...477..916B. doi: 10.1086/303725.
  13. ^ Evans, Nancy Remage (1990). "The orbit and colors of the Cepheid S MUSCAE". Publications of the Astronomical Society of the Pacific. 102: 551. Bibcode: 1990PASP..102..551E. doi: 10.1086/132668.
  14. ^ Remage Evans, Nancy; Pillitteri, Ignazio; Wolk, Scott; Guinan, Edward; Engle, Scott; Bond, Howard E.; Schaefer, Gail H.; Karovska, Margarita; Depasquale, Joseph; Tingle, Evan (2014). "X-Ray Detection of the Cluster Containing the Cepheid S Mus". The Astrophysical Journal Letters. 785 (2): L25. arXiv: 1403.6939. Bibcode: 2014ApJ...785L..25E. doi: 10.1088/2041-8205/785/2/L25. S2CID  119113620.
Retrieved from " https://en.wikipedia.org/?title=S_Muscae&oldid=1191753245"
From Wikipedia, the free encyclopedia
S Muscae
Location of S Muscae (circled)
Observation data
Epoch J2000       Equinox J2000
Constellation Musca
Right ascension 12h 12m 47.01834s [1]
Declination −70° 09′ 06.4363″ [1]
Apparent magnitude (V) 6.394 [2] (5.89 - 6.49 [3])
Characteristics
Spectral type F6Ib (F6-G0 [3]) + B5V [4]
U−B color index +0.66 [5]
B−V color index +1.00 [5]
Variable type δ Cepheid [3]
Astrometry
Radial velocity (Rv)−1.91 [6] km/s
Proper motion (μ) RA: −7.79 [1]  mas/ yr
Dec.: −0.60 [1]  mas/ yr
Parallax (π)1.99 ± 0.84  mas [1]
Distance863 [2]  pc
Absolute magnitude (MV)−4.01 [7]
Orbit [7] [8]
Period (P)504.9 ± 0.07
Semi-major axis (a)794 AU
Eccentricity (e)0.08 ± 0.002
Inclination (i)32 ± 1°
Semi-amplitude (K1)
(primary)		14.7 ± 0.2 km/s
Details
Mass6.2 [7]  M☉
Radius65.1 [2]  R☉
Luminosity3,467 [7]  L☉
Metallicity+0.18 [9]
companion
Mass5.3 [7]  M☉
Temperature17,000 [10]  K
Other designations
S Mus, HR 4645, SAO 251791, CD−69°977, GSC 09231-00752, HD 106111, GC 16679, HIP 59551, AAVSO 1207-69
Database references
SIMBAD data

S Muscae is a classical (δ) Cepheid variable star in the constellation Musca about 2,600 light years away.

A light curve for S Muscae, plotted from TESS data [11]

S Muscae is a yellow supergiant ranging between spectral types F6Ib and G0Ib and magnitudes 5.89 to 6.49 over a period of 9.66 days. [3] It is a luminous star around six times as massive as the Sun and 65.1 times the radius of the Sun. It is a binary star with a blue-white main sequence star companion likely to be of spectral type B3V to B5V with a mass of just over five solar masses, [12] one of the hottest and brightest companions of a Cepheid known. The two stars orbit each other every 505 days. [13]

S Muscae has been found to lie within the faint star cluster ASCC 69. [14]

References

  1. ^ a b c d e 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.
  2. ^ a b c Moskalik, P.; Gorynya, N. A. (2005). "Mean Angular Diameters and Angular Diameter Amplitudes of Bright Cepheids". Acta Astronomica. 55: 247. arXiv: astro-ph/0507076. Bibcode: 2005AcA....55..247M.
  3. ^ a b c d Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode: 2009yCat....102025S.
  4. ^ Skiff, B. A. (2014). "VizieR Online Data Catalog: Catalogue of Stellar Spectral Classifications (Skiff, 2009-2014)". VizieR On-line Data Catalog: B/Mk. Originally Published in: Lowell Observatory (October 2014). 1. Bibcode: 2014yCat....1.2023S.
  5. ^ a b Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode: 2002yCat.2237....0D.
  6. ^ Pourbaix, D.; Tokovinin, A. A.; Batten, A. H.; Fekel, F. C.; Hartkopf, W. I.; Levato, H.; Morrell, N. I.; Torres, G.; Udry, S. (2004). "SB9: The ninth catalogue of spectroscopic binary orbits". Astronomy and Astrophysics. 424 (2): 727–732. arXiv: astro-ph/0406573. Bibcode: 2004A&A...424..727P. doi: 10.1051/0004-6361:20041213. S2CID  119387088.
  7. ^ a b c d e Remage Evans, Nancy; Bond, Howard E.; Schaefer, Gail H.; Mason, Brian D.; Karovska, Margarita; Tingle, Evan (2013). "Binary Cepheids: Separations and Mass Ratios in 5 M ⊙ Binaries". The Astronomical Journal. 146 (4): 93. arXiv: 1307.7123. Bibcode: 2013AJ....146...93E. doi: 10.1088/0004-6256/146/4/93. S2CID  34133110.
  8. ^ Petterson, O. K. L.; Cottrell, P. L.; Albrow, M. D. (2004). "The orbits of southern binary Cepheids". Monthly Notices of the Royal Astronomical Society. 350 (1): 95–112. Bibcode: 2004MNRAS.350...95P. doi: 10.1111/j.1365-2966.2004.07555.x.
  9. ^ Klagyivik, P.; Szabados, L. (2009). "Observational studies of Cepheid amplitudes. I. Period-amplitude relationships for Galactic Cepheids and interrelation of amplitudes". Astronomy and Astrophysics. 504 (3): 959. arXiv: 0908.3561. Bibcode: 2009A&A...504..959K. doi: 10.1051/0004-6361/200811464. S2CID  18283579.
  10. ^ Evans, Nancy Remage; Massa, Derck; Fullerton, Alexander; Sonneborn, George; Iping, Rosina (2006). "Cepheid Masses: FUSE Observations of S Muscae". The Astrophysical Journal. 647 (2): 1387–1392. arXiv: astro-ph/0607489. Bibcode: 2006ApJ...647.1387E. doi: 10.1086/505519. S2CID  119020617.
  11. ^ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 8 December 2021.
  12. ^ Bohm-Vitense, Erika; Remage Evans, Nancy; Carpenter, Kenneth; Beck-Winchatz, Bernhard; et al. (1997). "The Mass of the Classical Cepheid S Muscae". The Astrophysical Journal. 477 (2): 916. Bibcode: 1997ApJ...477..916B. doi: 10.1086/303725.
  13. ^ Evans, Nancy Remage (1990). "The orbit and colors of the Cepheid S MUSCAE". Publications of the Astronomical Society of the Pacific. 102: 551. Bibcode: 1990PASP..102..551E. doi: 10.1086/132668.
  14. ^ Remage Evans, Nancy; Pillitteri, Ignazio; Wolk, Scott; Guinan, Edward; Engle, Scott; Bond, Howard E.; Schaefer, Gail H.; Karovska, Margarita; Depasquale, Joseph; Tingle, Evan (2014). "X-Ray Detection of the Cluster Containing the Cepheid S Mus". The Astrophysical Journal Letters. 785 (2): L25. arXiv: 1403.6939. Bibcode: 2014ApJ...785L..25E. doi: 10.1088/2041-8205/785/2/L25. S2CID  119113620.
Retrieved from " https://en.wikipedia.org/?title=S_Muscae&oldid=1191753245"

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