HD 16004

Last updated
HD 16004
Observation data
Epoch J2000       Equinox J2000
Constellation Andromeda [1]
Right ascension 02h 35m 27.90126s [2]
Declination +39° 39′ 51.7705″ [2]
Apparent magnitude  (V)6.26 [3]
Characteristics
Spectral type B9.5 III HgMn [3]
U−B color index −0.33 [3]
B−V color index −0.30 [3]
Astrometry
Radial velocity (Rv)−6.8±1.1 [4] km/s
Proper motion (μ)RA: +16.659 [2] mas/yr
Dec.: −34.296 [2] mas/yr
Parallax (π)4.9384±0.1650  mas [2]
Distance 660 ± 20  ly
(202 ± 7  pc)
Absolute magnitude  (MV)−0.36 [5]
Details
Mass 2.88 [6]   M☉
Radius 3.274 [7]   R☉
Luminosity 158 [7]   L☉
Surface gravity (log g)3.8 [6]   cgs
Temperature 10,809 [6]   K
Metallicity [Fe/H]−0.17 [6]   dex
Rotational velocity (v sin i)30 [8]  km/s
Age 162 [9]   Myr
Other designations
BD+39°573, GC 3093, HD 16004, HIP 12057, HR 746, SAO 55680, WDS J02355+3940A [10]
Database references
SIMBAD data

HD 16004 is blue-white hued star in the northern constellation of Andromeda. It is a challenge to see with the naked eye even under good viewing conditions, having an apparent visual magnitude of 6.26. [3] Located approximately 660 light-years (202 parsecs ) away from the Sun based on parallax, it is drifting closer with a heliocentric radial velocity of −7 km/s. [4]

This is a chemically peculiar mercury-manganese star [11] with a stellar classification of B9.5 III HgMn. [3] It is an estimated 162 million years old and is spinning with a projected rotational velocity of 30  km/s . [8] The star is radiating 158 times the luminosity of the Sun from its photosphere at an effective temperature of 10,809  K .

References

  1. ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific . 99 (617): 695. Bibcode:1987PASP...99..695R. doi: 10.1086/132034 . Constellation record for this object at VizieR.
  2. 1 2 3 4 5 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.
  3. 1 2 3 4 5 6 Jaschek, M.; et al. (1980). "The absolute magnitude of the Hg-Mn stars". Astronomy and Astrophysics. 81: 142. Bibcode:1980A&A....81..142J.
  4. 1 2 Gontcharov, G. A. (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.
  5. ↑ Westin, T. N. G. (1985). "The local system of early type stars - Spatial extent and kinematics". Astronomy and Astrophysics Supplement Series. 60: 99–134. Bibcode:1985A&AS...60...99W.
  6. 1 2 3 4 Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevič, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M.; Minchev, I.; De Jong, R. S.; Antoja, T.; Ramos, P.; Steinmetz, M.; Enke, H. (2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy and Astrophysics. 628: A94. arXiv: 1904.11302 . Bibcode:2019A&A...628A..94A. doi:10.1051/0004-6361/201935765. S2CID   131780028.
  7. 1 2 McDonald, I.; et al. (2017). "Fundamental parameters and infrared excesses of Hipparcos stars". Monthly Notices of the Royal Astronomical Society. 471 (1): 770–791. arXiv: 1706.02208 . Bibcode:2017MNRAS.471..770M. doi: 10.1093/mnras/stx1433 . S2CID   73594365.
  8. 1 2 Abt, Helmut A.; et al. (2002). "Rotational Velocities of B Stars". The Astrophysical Journal. 573 (1): 359–365. Bibcode:2002ApJ...573..359A. doi: 10.1086/340590 .
  9. ↑ Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771–782. arXiv: 1606.08814 . Bibcode:2012AstL...38..771G. doi:10.1134/S1063773712120031. S2CID   118345778.
  10. ↑ "HD 16004". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2020-07-07.
  11. ↑ Renson, P.; Manfroid, J. (2009). "Catalogue of Ap, HgMn and Am stars". Astronomy and Astrophysics. 498 (3): 961. Bibcode:2009A&A...498..961R. doi: 10.1051/0004-6361/200810788 .
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