S Arae
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Ara |
| Right ascension | 17h 59m 10.7311s[2] |
| Declination | −49° 26′ 00.453″[2] |
| Apparent magnitude (V) | 9.92 to 11.24[3] |
| Characteristics | |
| Spectral type | A3 II[4] |
| B−V color index | 0.9[2] |
| Variable type | RRab[3] |
| Astrometry | |
| Radial velocity (Rv) | 185 ± 655.35[2] km/s |
| Proper motion (μ) | RA: −26.24[2] mas/yr Dec.: −8.44[2] mas/yr |
| Parallax (π) | 1.1191 ± 0.0431 mas[5] |
| Distance | 2,900 ± 100 ly (890 ± 30 pc) |
| Absolute magnitude (MV) | +0.78 – +0.93[6] |
| Details | |
| Mass | 0.51 – 0.62[6] M☉ |
| Radius | 3.01[5] R☉ |
| Luminosity | 27[5] L☉ |
| Surface gravity (log g) | +2.9[6] cgs |
| Temperature | 6,563[5] K |
| Metallicity [Fe/H] | −0.90[6] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
S Arae (S Ara) is an RR Lyrae-type pulsating variable star in the constellation of Ara.[2] It has an apparent visual magnitude which varies between 9.92 and 11.24 during its 10.85-hour pulsation period,[1][3] and it exhibits the Blazhko effect.[6]
References[edit]
- ^ a b Chadid, M.; Vernin, J.; Mekarnia, D.; Chapellier, E.; Trinquet, H.; Bono, G. (June–July 2010). "First Antarctica light curve PAIX monitoring of the Blazhko RR Lyrae star: S Arae". Astronomy & Astrophysics. 516. doi:10.1051/0004-6361/201014857. Retrieved 24 October 2021.
- ^ a b c d e f g h "V* S Ara". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 10 November 2009.
- ^ a b c S Ara, database entry, The combined table of GCVS Vols I-III and NL 67–78 with improved coordinates, General Catalogue of Variable Stars Archived 20 June 2017 at the Wayback Machine, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line 10 November 2009.
- ^ Stock, J.; Wroblewski, H. (1972). "A southern objective prism survey". Publ. Obs. Astron. Nacional. 2: 59. Bibcode:1972PDAUC...2...59S.
- ^ a b c d 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.
- ^ a b c d e Zalian, C.; Chadid, M.; Vernin, J.; Abe, L.; Agabi, A. (2016). "Antarctica photometry of the Blazhko RR Lyrae star S Arae". Monthly Notices of the Royal Astronomical Society. 456 (1): 192. Bibcode:2016MNRAS.456..192Z. doi:10.1093/mnras/stv2611.
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