Rho Pavonis
  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Pavo |
| Right ascension | 20h 37m 35.31275s[1] |
| Declination | −61° 31′ 47.7145″[1] |
| Apparent magnitude (V) | 4.86[2] (4.85 – 4.91)[3] |
| Characteristics | |
| Spectral type | Fm δ Del[4] |
| U−B color index | +0.19[3] |
| B−V color index | +0.43[3] |
| Variable type | δ Sct[5] |
| Astrometry | |
| Radial velocity (Rv) | +8.0±0.8[2] km/s |
| Proper motion (μ) | RA: +59.61[1] mas/yr Dec.: −72.69[1] mas/yr |
| Parallax (π) | 17.20 ± 0.24 mas[1] |
| Distance | 190 ± 3 ly (58.1 ± 0.8 pc) |
| Absolute magnitude (MV) | 1.04[6] |
| Details | |
| Radius | 4.33+0.39 −0.17[7] R☉ |
| Luminosity | 34.1±0.8[7] L☉ |
| Temperature | 6,704+136 −285[7] K |
| Rotational velocity (v sin i) | 45.0[8] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
Rho Pavonis, Latinized from ρ Pavonis, is a single,[10] variable star in the southern constellation of Pavo. It is yellow-white in hue and faintly visible to the naked eye with an apparent visual magnitude that fluctuates around 4.86.[2] The star is located at a distance of approximately 190 light years from the Sun based on parallax,[1] and is drifting further away with a radial velocity of +8 km/s.[2] It is a candidate outlying member of the Tucana Association of co-moving stars.[11]
This is a metallic-line star with a stellar classification of Fm δ Del,[4] where the suffix notation indicating it is a δ Delphini star. It is a Delta Scuti variable, varying in brightness by 0.03 magnitudes.[13] The dominant pulsation period is 2.74 hours, but the effects of other pulsation periods are apparent in the light curve.[14] The star has 4.3[7] times the girth of the Sun and is spinning with a projected rotational velocity of 45 km/s.[8] It is radiating 34[7] times the luminosity of the Sun from its photosphere at an effective temperature of 6,704 K.[7]
References
[edit]- ^ 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. Vizier catalog entry
- ^ a b c d 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.
- ^ a b c Garcia, J. R.; Cebral, J. R.; Scoccimarro, E. R.; Wahnon, P.; Arena, R.; Bazterra, V.; Pellizza, L.; Risi, A.; Rodriguez, M. L.; Zimmermann, M. (1995). "A catalogue of variable stars in the lower instability strip". Astronomy and Astrophysics Supplement. 109: 201. Bibcode:1995A&AS..109..201G.
- ^ a b Houk, N.; Cowley, A. P. (1975), Michigan catalogue of two-dimensional spectral types for the HD stars. Declinations -90_ to -53_ƒ0, vol. 1, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1975mcts.book.....H
- ^ Samus, N. N.; Durlevich, O. V.; et al. (2009). "General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-Line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
- ^ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644. Vizier catalog entry
- ^ a b c d e f 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 Głȩbocki, R.; Gnaciński, P. (March 2005), "Catalog of Stellar Rotational Velocities", VizieR On-Line Data Catalog: III/244. Originally Published in: Proceedings of the 13th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun, 3244, Bibcode:2005yCat.3244....0G Vizier catalog entry
- ^ "rho Pav". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-10-16.
- ^ 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.
- ^ Zuckerman, B.; et al. (September 2001). "Tucana Association". The Astrophysical Journal. 559 (1): 388–394. Bibcode:2001ApJ...559..388Z. doi:10.1086/322305.
- ^ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 8 December 2021.
- ^ Rodríguez, E.; et al. (June 2000). "A revised catalogue of delta Sct stars". Astronomy and Astrophysics Supplement. 144 (3): 469–474. Bibcode:2000A&AS..144..469R. doi:10.1051/aas:2000221. hdl:10261/226673.
- ^ Kurtz, D. W. (March 1981). "The δ Scuti variability of the high metallicity δ Del star, rho Pavonis". Monthly Notices of the Royal Astronomical Society. 194: 737–746. doi:10.1093/mnras/194.3.737.
