Astronomy:HD 10390

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Short description: B-type main-sequence star; Triangulum
HD 10390
Triangulum constellation map.svg
Red circle.svg
Location of HD 10390 on the map (circled)
Observation data
Epoch J2000.0   Equinox (celestial coordinates)
Constellation Triangulum
Right ascension  01h 42m 03.48964s[1]
Declination +35° 14′ 44.5389″[1]
Apparent magnitude (V) 5.64[2]
Characteristics
Evolutionary stage main sequence star[3]
Spectral type B9 IV-V[4] or B9 V[5]
U−B color index −0.20[2]
B−V color index −0.07[2]
Astrometry
Radial velocity (Rv)−1.9±2.0[6] km/s
Proper motion (μ) RA: +48.763[1] mas/yr
Dec.: −25.418[1] mas/yr
Parallax (π)11.1882 ± 0.164[1] mas
Distance292 ± 4 ly
(89 ± 1 pc)
Absolute magnitude (MV)+1.00[7]
Details
Mass2.62[8] M☉
Radius2.14±0.11[9] R☉
Luminosity51.5+2.4−2.3[3] L☉
Surface gravity (log g)4.23+0.08−0.04[10] cgs
Temperature11,076±139[11] K
Metallicity [Fe/H]−0.20[12] dex
Rotational velocity (v sin i)45[13] km/s
Age50+81−31[14] Myr
Other designations
6 H. Trianguli,[15] BD+34°297, FK5 1047, GC 2064, HD 10390, HIP 7943, HR 490, SAO 54912[16]
Database references
SIMBADdata

HD 10390 (HR 490; 51 H. Trinaguli) is a solitary star[17] located in the northern constellation Triangulum. It is faintly visible to the naked eye as a bluish-white hued point of light with an apparent magnitude of 5.64.[2] The object is located relatively close at a distance of 292 light-years based on Gaia DR3 parallax measurements[1] and it is drifting closer with a heliocentric radial velocity of −1.9 km/s.[6] At its current distance, HD 10390's brightness is diminished by an interstellar extinction of only five-hundredths of a magnitude[18] and it has an absolute magnitude of +1.00.[7]

HD 10390 has a stellar classification of B9 IV-V,[4] indicating that it is a slightly evolved B-type star with a luminosity class intermediate between a subgiant and a main sequence star. Osawa (1959) gave a class of B9 V,[5] instead indicating that it is an ordinary B-type main-sequence star that is generating energy via hydrogen fusion at its core. It has 2.62 times the mass of the Sun[8] and 2.14 times the radius of the Sun.[9] It radiates 51.5 times the luminosity of the Sun[3] from its photosphere at an effective temperature of 11,076 K.[11] HD 10390 is metal defecient with an iron abundance of [Fe/H] = −0.2 or 63.1% of the Sun's[12] and it spins modestly with a projected rotational velocity of 45 km/s,[13] well below its breakup velocity of 355 km/s.[19] Despite the first classification, HD 10390 has only completed 16.8% of its main sequence lifetime[3] at the age of approximately 50 million years. [14]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 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. ↑ 2.0 2.1 2.2 2.3 Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system.". VizieR Online Data Catalog. Bibcode: 2002yCat.2237....0D. 
  3. ↑ 3.0 3.1 3.2 3.3 Zorec, J.; Royer, F. (January 2012). "Rotational velocities of A-type stars IV: Evolution of rotational velocities". Astronomy & Astrophysics 537: A120. doi:10.1051/0004-6361/201117691. ISSN 0004-6361. Bibcode: 2012A&A...537A.120Z. 
  4. ↑ 4.0 4.1 Cowley, A. (November 1972). "Spectral classification of the bright B8 stars.". The Astronomical Journal 77: 750. doi:10.1086/111348. ISSN 0004-6256. Bibcode: 1972AJ.....77..750C. 
  5. ↑ 5.0 5.1 Osawa, Kiyoteru (July 1959). "Spectral Classification of 533 B8-A2 Stars and the Mean Absolute Magnitude of A0 V Stars.". The Astrophysical Journal (American Astronomical Society) 130: 159. doi:10.1086/146706. ISSN 0004-637X. Bibcode: 1959ApJ...130..159O. 
  6. ↑ 6.0 6.1 Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities.". Carnegie Institute Washington D.C. Publication: 0. Bibcode: 1953GCRV..C......0W. 
  7. ↑ 7.0 7.1 Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331–346. doi:10.1134/S1063773712050015. ISSN 1063-7737. Bibcode: 2012AstL...38..331A. 
  8. ↑ 8.0 8.1 David, Trevor J.; Hillenbrand, Lynne A. (12 May 2015). "The Ages of Early-type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal 804 (2): 146. doi:10.1088/0004-637X/804/2/146. Bibcode: 2015ApJ...804..146D. 
  9. ↑ 9.0 9.1 Kervella, P.; Thévenin, F.; Di Folco, E.; Ségransan, D. (April 8, 2004). "The angular sizes of dwarf stars and subgiants: Surface brightness relations calibrated by interferometry". Astronomy & Astrophysics 426 (1): 297–307. doi:10.1051/0004-6361:20035930. ISSN 0004-6361. Bibcode: 2004A&A...426..297K. 
  10. ↑ Stassun, Keivan G. et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S. 
  11. ↑ 11.0 11.1 Paunzen, E.; Schnell, A.; Maitzen, H. M. (December 2005). "An empirical temperature calibration for the Δa photometric system I: The B-type stars". Astronomy & Astrophysics 444 (3): 941–946. doi:10.1051/0004-6361:20053546. ISSN 0004-6361. Bibcode: 2005A&A...444..941P. 
  12. ↑ 12.0 12.1 Anders, F. et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics 628: A94. doi:10.1051/0004-6361/201935765. ISSN 0004-6361. Bibcode: 2019A&A...628A..94A. 
  13. ↑ 13.0 13.1 Abt, Helmut A.; Levato, Hugo; Grosso, Monica (July 2002). "Rotational Velocities of B Stars". The Astrophysical Journal 573 (1): 359–365. doi:10.1086/340590. ISSN 0004-637X. Bibcode: 2002ApJ...573..359A. 
  14. ↑ 14.0 14.1 Grosbol, P. J. (June 1978). "Space velocities and ages of nearby early-type stars.". Astronomy and Astrophysics Supplement Series 32: 409–421. ISSN 0365-0138. Bibcode: 1978A&AS...32..409G. 
  15. ↑ Verbunt, F.; van Gent, R. H. (June 2010). "The star catalogue of Hevelius: Machine-readable version and comparison with the modern Hipparcos Catalogue". Astronomy and Astrophysics 516: A29. doi:10.1051/0004-6361/201014003. ISSN 0004-6361. Bibcode: 2010A&A...516A..29V. 
  16. ↑ "HD 10390". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+10390. 
  17. ↑ Eggleton, P. P.; Tokovinin, A. A. (11 September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society 389 (2): 869–879. doi:10.1111/j.1365-2966.2008.13596.x. ISSN 0035-8711. Bibcode: 2008MNRAS.389..869E. 
  18. ↑ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society 472 (4): 3805–3820. doi:10.1093/mnras/stx2219. ISSN 0035-8711. Bibcode: 2017MNRAS.472.3805G. 
  19. ↑ Huang, Wenjin; Gies, D. R.; McSwain, M. V. (22 September 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. ISSN 0004-637X. Bibcode: 2010ApJ...722..605H. 



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