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R Serpentis

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R Serpentis

The visual band light curve of R Serpentis, from AAVSO data[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Serpens[2]
Right ascension 15h 50m 41.73245s[3]
Declination +15° 08′ 01.0810″[3]
Apparent magnitude (V) 5.2 - 14.4[4]
Characteristics
Evolutionary stage AGB[5]
Spectral type M5-8e[6]
B−V color index 1.500±0.510[2]
Variable type Mira[4]
Astrometry
Radial velocity (Rv)23.8±0.8[7] km/s
Proper motion (μ) RA: +2.387[3] mas/yr
Dec.: −36.699[3] mas/yr
Parallax (π)3.5110±0.2966 mas[3]
Distance930 ± 80 ly
(280 ± 20 pc)
Details
Mass3.6[8] M☉
Radius79[9] R☉
Luminosity758[9] L☉
Surface gravity (log g)1.55[8] cgs
Temperature3,413[9] K
Other designations
R Ser, BD+15°2918, HD 141850, HIP 77615, HR 5894, SAO 101771[10]
Database references
SIMBADdata

R Serpentis is a Mira variable type star in the equatorial constellation of Serpens. It ranges between apparent magnitude 5.16 and 14.4, and spectral types M5e to M8e, over a period of 356.41 days.[4][11] The variability of this star was discovered in 1826 by Karl Ludwig Harding.[12]

References

[edit]
  1. ^ "Download Data". aavso.org. AAVSO. Retrieved 1 October 2021.
  2. ^ 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.
  3. ^ a b c d e 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.
  4. ^ a b c Samus', N. N; Kazarovets, E. V; Durlevich, O. V; Kireeva, N. N; Pastukhova, E. N (2017), "General catalogue of variable stars: Version GCVS 5.1", Astronomy Reports, 61 (1): 80, Bibcode:2017ARep...61...80S, doi:10.1134/S1063772917010085, S2CID 125853869.
  5. ^ McDonald, I.; Zijlstra, A. A. (2016). "Pulsation-triggered Mass Loss from AGB Stars: The 60 Day Critical Period". The Astrophysical Journal. 823 (2): L38. arXiv:1605.02622. Bibcode:2016ApJ...823L..38M. doi:10.3847/2041-8205/823/2/L38.
  6. ^ Keenan, Philip C.; et al. (1974), "Revised Catalog of Spectra of Mira Variables of Types ME and Se", Astrophysical Journal Supplement, 28: 271, Bibcode:1974ApJS...28..271K, doi:10.1086/190318.
  7. ^ 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, S2CID 119231169.
  8. ^ a b Khalatyan, A.; Anders, F.; Chiappini, C.; Queiroz, A. B. A.; Nepal, S.; Dal Ponte, M.; Jordi, C.; Guiglion, G.; Valentini, M.; Torralba Elipe, G.; Steinmetz, M.; Pantaleoni-González, M.; Malhotra, S.; Jiménez-Arranz, Ó.; Enke, H.; Casamiquela, L.; Ardèvol, J. (2024). "Transferring spectroscopic stellar labels to 217 million Gaia DR3 XP stars with SHBoost". Astronomy and Astrophysics. 691: A98. arXiv:2407.06963. Bibcode:2024A&A...691A..98K. doi:10.1051/0004-6361/202451427.
  9. ^ a b c McDonald, I.; Zijlstra, A. A.; Watson, R. A. (2017). "Fundamental parameters and infrared excesses of Tycho-Gaia stars". Monthly Notices of the Royal Astronomical Society. 471 (1): 770. arXiv:1706.02208. Bibcode:2017MNRAS.471..770M. doi:10.1093/mnras/stx1433.
  10. ^ "R Ser". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 5 September 2018.
  11. ^ Watson, Christopher (4 January 2010). "R Serpentis". AAVSO Website. American Association of Variable Star Observers. Retrieved 22 May 2014.
  12. ^ Zsoldos, E. (1994). "Three Early Variable Star Catalogues". Journal for the History of Astronomy. 25 (2): 92–98. Bibcode:1994JHA....25...92Z. doi:10.1177/002182869402500202. S2CID 117099222.
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