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] When it is near maximum brightness, it can be seen with the naked eye under excellent observing conditions. 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.