HD 29573 is a binary star[3] system in the constellation Eridanus. It has a combined apparent visual magnitude of 4.99,[2] making it visible to the naked eye. Based upon an annual parallax shift of 14.23 mas,[1] it is located 229 light years from the Sun. The system is moving further away from Earth with a heliocentric radial velocity of +3 km/s.[5]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Eridanus |
| Right ascension | 04h 38m 53.55015s[1] |
| Declination | −12° 07′ 23.0681″[1] |
| Apparent magnitude (V) | 4.99[2] (5.19 + 7.22)[3] |
| Characteristics | |
| Spectral type | A0 V (A1 + F2)[2] |
| B−V color index | 0.074±0.003[4] |
| Astrometry | |
| Radial velocity (Rv) | +2.9±0.8[5] km/s |
| Proper motion (μ) | RA: −60.614[1] mas/yr Dec.: −16.417[1] mas/yr |
| Parallax (π) | 14.2348 ± 0.3656 mas[1] |
| Distance | 229 ± 6 ly (70 ± 2 pc) |
| Absolute magnitude (MV) | 0.73[4] |
| Orbit[2] | |
| Period (P) | 40.9±1.386 yr |
| Semi-major axis (a) | 0.2844±0.0055″ |
| Eccentricity (e) | 0.759±0.180 |
| Inclination (i) | 75.5±2.2° |
| Longitude of the node (Ω) | 152.0±1.8° |
| Periastron epoch (T) | 2003.805 |
| Argument of periastron (ω) (secondary) | 284.1±11.0° |
| Details | |
| HD 29573 A | |
| Mass | 2.28[2] M☉ |
| Luminosity | 51.8+4.6 −4.3[6] L☉ |
| Temperature | 8,892+103 −102[6] K |
| Rotational velocity (v sin i) | 27[6] km/s |
| HD 29573 B | |
| Mass | 1.56[2] M☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
The binary nature of this system was discovered through observations made with the Hipparcos spacecraft. The pair orbit each other with a period of 41 years and an eccentricity of 0.8.[2] The magnitude 5.19[3] primary component has a class of A1,[2] 2.28[2] times the mass of the Sun, and is a suspected chemically peculiar star.[8] The secondary has magnitude 7.22,[3] 1.56[2] times the Sun's mass, and a class of F2.[2] The system has a possible infrared excess[9] due to circumstellar dust.[10]
References
edit- ^ a b c d e f Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c d e f g h i j k Cvetković, Z.; et al. (March 2014), "Orbits for Eight Hipparcos Double Stars", The Astronomical Journal, 147 (3): 9, Bibcode:2014AJ....147...62C, doi:10.1088/0004-6256/147/3/62, S2CID 121138730, 62.
- ^ a b c d Eggleton, P. P.; Tokovinin, A. A. (2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
- ^ 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.
- ^ a b de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.
- ^ a b c Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID 55586789.
- ^ "HD 29573". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-07-23.
- ^ Renson, P.; Manfroid, J. (May 2009), "Catalogue of Ap, HgMn and Am stars", Astronomy and Astrophysics, 498 (3): 961–966, Bibcode:2009A&A...498..961R, doi:10.1051/0004-6361/200810788.
- ^ Shylaja, B. S.; Ashok, N. M. (June 2002), "IR observations of Am stars", Bulletin of the Astronomical Society of India, 30: 491–500, Bibcode:2002BASI...30..491S.
- ^ Kamp, I.; et al. (June 2002), "Do dusty A stars exhibit accretion signatures in their photospheres?", Astronomy and Astrophysics, 388 (3): 978–984, arXiv:astro-ph/0204449, Bibcode:2002A&A...388..978K, doi:10.1051/0004-6361:20020493, S2CID 18191361.