Astronomy:HD 30963
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Eridanus |
| Right ascension | 04h 51m 39.2471s[1] |
| Declination | −10° 17′ 25.212″[1] |
| Apparent magnitude (V) | 7.23[2] |
| Characteristics | |
| Spectral type | B9 HgMn[3] |
| Astrometry | |
| Radial velocity (Rv) | −7.2[4] km/s |
| Proper motion (μ) | RA: −7.435[1] mas/yr Dec.: −3.538[1] mas/yr |
| Parallax (π) | 3.1899 ± 0.0204[1] mas |
| Distance | 1,022 ± 7 ly (313 ± 2 pc) |
| Details | |
| Mass | 3.3[1] M☉ |
| Radius | 3.3[1] R☉ |
| Luminosity | 182[1] L☉ |
| Surface gravity (log g) | 3.664±0.031[4] cgs |
| Temperature | 11,476±150[4] K |
| Metallicity [Fe/H] | −0.19[5] dex |
| Rotational velocity (v sin i) | 24±12[4] km/s |
| Age | 207[1] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 30963 is a star in the constellation of Eridanus. With an apparent magnitude of 7.23,[2] it cannot be seen with the naked eye. Parallax measurements put the star at a distance of around 1,022 light-years (313 parsecs).
HD 30963 is a late B-type star.[3] It is a mercury-manganese star,[3] a class of chemically peculiar star that has an overabundance of certain elements like mercury. HD 30963 has 150,000 times as much mercury, 2,500 times as much platinum, 1,000 times as much yttrium, and 150 times as much zirconium compared to the Sun.[3] It has a mass of 3.3 M☉, and its surface temperature is about 11,500 K.
HD 30963 is close to the orbit that the solar system is traversing in the Milky Way. The sun will be close to the current location of HD 30963 in about 18.5 million years. Interstellar absorption lines for Na I are present for velocities lower than 10 km/s.[6][clarification needed]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 2.0 2.1 Høg, E. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27–L30. Bibcode: 2000A&A...355L..27H.
- ↑ 3.0 3.1 3.2 3.3 Monier, R.; Gebran, M.; Royer, F. (2016). "HD 30963: a new HgMn star". SF2A-2016: Proceedings of the Annual Meeting of the French Society of Astronomy and Astrophysics: 213–216. Bibcode: 2016sf2a.conf..213M.
- ↑ 4.0 4.1 4.2 4.3 Huang, Wenjin; Gies, D. R.; McSwain, M. V. (2010). "A Stellar Rotation Census of B Stars: From ZAMS to TAMS". The Astrophysical Journal 722 (1): 605–619. doi:10.1088/0004-637X/722/1/605. Bibcode: 2010ApJ...722..605H.
- ↑ Anders, F.; Khalatyan, A.; Queiroz, A. B. A.; Chiappini, C.; Ardevol, J.; Casamiquela, L.; Figueras, F.; Jimenez-Arranz, O. et al. (2022). "VizieR Online Data Catalog: StarHorse2, Gaia EDR3 photo-astrometric distances (Anders+, 2022)". Vizier Online Data Catalog. Bibcode: 2022yCat.1354....0A.
- ↑ Wyman, Katherine; Redfield, Seth (2013). "Probing Our Heliospheric History. I. High-resolution Observations of Na I and Ca II along the Solar Historical Trajectory". The Astrophysical Journal 773 (2): 96. doi:10.1088/0004-637X/773/2/96. Bibcode: 2013ApJ...773...96W.
Extra reading
- David-Uraz, A.; Shultz, M. E.; Petit, V.; Bowman, D. M.; Erba, C.; Fine, R. A.; Neiner, C.; Pablo, H. et al. (2021). "MOBSTER - IV. Detection of a new magnetic B-type star from follow-up spectropolarimetric observations of photometrically selected candidates★". Monthly Notices of the Royal Astronomical Society 504 (4): 4841. doi:10.1093/mnras/stab899. Bibcode: 2021MNRAS.504.4841D.
- Monier, R.; Griffin, E.; Gebran, M.; Kılıçoğlu, T.; Merle, T.; Royer, F. (26 September 2019). "The Chemical Compositions of the Two New HgMn Stars HD 30085 and HD 30963: Comparison to χ Lupi A, ν Cap, and HD 174567". The Astronomical Journal 158 (4): 157. doi:10.3847/1538-3881/ab3b59. Bibcode: 2019AJ....158..157M.
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