Astronomy:HD 37519
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Auriga[1] |
| Right ascension | 05h 40m 35.90737s[2] |
| Declination | +31° 21′ 29.5262″[2] |
| Apparent magnitude (V) | 6.04[3] |
| Characteristics | |
| Spectral type | B9.5III-IV(p)? (Hg?)[4] |
| U−B color index | −0.21[3] |
| B−V color index | +0.05[3] |
| Variable type | suspected[5] |
| Astrometry | |
| Radial velocity (Rv) | −10.2±3.4[6] km/s |
| Proper motion (μ) | RA: −5.051[2] mas/yr Dec.: −8.187[2] mas/yr |
| Parallax (π) | 4.0335 ± 0.1112[2] mas |
| Distance | 810 ± 20 ly (248 ± 7 pc) |
| Absolute magnitude (MV) | −0.43[7] |
| Details | |
| Mass | 2.8[8] M☉ |
| Radius | 6.2[9] R☉ |
| Luminosity | 221[9] L☉ |
| Surface gravity (log g) | 3.88[8] cgs |
| Temperature | 10,677[8] K |
| Rotational velocity (v sin i) | 195[10] km/s |
| Age | 375[7] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 37519 is a star in the northern constellation Auriga. It has a blue-white hue and is dimly visible to the naked eye with an apparent visual magnitude of 6.04.[3] The distance to HD 37519 is approximately 810 light years based on parallax, but it is drifting closer with a radial velocity of −10 km/s.[6]
Cowley in 1972 found a stellar classification of B9.5III-IV(p)? (Hg?) for this star,[4] suggesting it is an evolved B-type star and a suspected chemically peculiar star of the mercury-manganese type.[12] It is estimated to be 375 million years old and with a high rate of spin, showing a projected rotational velocity of 195 km/s.[10] In March 1964, a suspected flare of HD 37519 was detected that increased the star's brightness by about three magnitudes. Smaller variations of up to two magnitudes were detected a few days later,[13] suggesting there might be a flare star companion. However, follow-up observations failed to confirm the variability.[14] The star is radiating 221 times the luminosity of the Sun[9] from its photosphere at an effective temperature of 10,677 K.[8]>
References
- ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific 99 (617): 695. doi:10.1086/132034. Bibcode: 1987PASP...99..695R Constellation record for this object at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 3.0 3.1 3.2 3.3 Johnson, H. L. et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory 4 (99): 99, Bibcode: 1966CoLPL...4...99J.
- ↑ 4.0 4.1 Cowley, A. (November 1972), "Spectral classification of the bright B8 stars", Astronomical Journal 77: 750–755, doi:10.1086/111348, Bibcode: 1972AJ.....77..750C.
- ↑ Samus, N. N. et al. (2017), "General Catalogue of Variable Stars", Astronomy Reports, 5.1 61 (1): 80–88, doi:10.1134/S1063772917010085, Bibcode: 2017ARep...61...80S.
- ↑ 6.0 6.1 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, doi:10.1134/S1063773706110065, Bibcode: 2006AstL...32..759G.
- ↑ 7.0 7.1 Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters 38 (11): 694–706, doi:10.1134/S1063773712110035, Bibcode: 2012AstL...38..694G.
- ↑ 8.0 8.1 8.2 8.3 Khalatyan, A.; Anders, F.; Chiappini, C.; Queiroz, A. B. A.; Nepal, S.; Dal Ponte, M.; Jordi, C.; Guiglion, G. et al. (2024). "Transferring spectroscopic stellar labels to 217 million Gaia DR3 XP stars with SHBoost". Astronomy and Astrophysics 691: A98. doi:10.1051/0004-6361/202451427. Bibcode: 2024A&A...691A..98K.
- ↑ 9.0 9.1 9.2 Fetherolf, Tara; Pepper, Joshua; Simpson, Emilie; Kane, Stephen R.; Močnik, Teo; English, John Edward; Antoci, Victoria; Huber, Daniel et al. (2023). "Variability Catalog of Stars Observed during the TESS Prime Mission". The Astrophysical Journal Supplement Series 268 (1): 4. doi:10.3847/1538-4365/acdee5. Bibcode: 2023ApJS..268....4F.
- ↑ 10.0 10.1 Abt, Helmut A. et al. (July 2002), "Rotational Velocities of B Stars", The Astrophysical Journal 573 (1): 359–365, doi:10.1086/340590, Bibcode: 2002ApJ...573..359A.
- ↑ "HD 36780". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+36780.
- ↑ Renson, P.; Manfroid, J. (May 2009), "Catalogue of Ap, HgMn and Am stars", Astronomy and Astrophysics 498 (3): 961–966, doi:10.1051/0004-6361/200810788, Bibcode: 2009A&A...498..961R.
- ↑ Mammano, A. (May 1966), "Spectrum of the Early-Type Flare Star BD +13 1048", Information Bulletin on Variable Stars 134: 1, Bibcode: 1966IBVS..134....1M.
- ↑ Andrews, A. D. (July 1996), "A Re-Examination of the Suspected Early-Type Flare Star BD+31 1048 (bs 1938) in Auriga: a Skeleton from the Cupboard", Irish Astronomical Journal 23 (2): 189, Bibcode: 1996IrAJ...23..189A.
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