83 Ursae Majoris

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83 Ursae Majoris
IQUMaLightCurve.png
A light curve for IQ Ursae Majoris, plotted from Hipparcos data [1]
Observation data
Epoch J2000       Equinox J2000
Constellation Ursa Major
Right ascension 13h 40m 44.27335s [2]
Declination +54° 40′ 53.8891″ [2]
Apparent magnitude  (V)4.69 - 4.75 [3]
Characteristics
Spectral type M2 III [4]
B−V color index +1.630±0.006 [5]
Variable type SRb [3]
Astrometry
Radial velocity (Rv)−18.61±0.20 [6]  km/s
Proper motion (μ)RA: −19.06 [2]   mas/yr
Dec.: −10.56 [2]   mas/yr
Parallax (π)6.23 ± 0.22  mas [2]
Distance 520 ± 20  ly
(161 ± 6  pc)
Absolute magnitude  (MV)−1.39 [5]
Details
Mass 1.1 [7]   M☉
Radius 80 [8]   R☉
Luminosity 1,250 [9]   L☉
Surface gravity (log g)0.62 [7]   cgs
Temperature 3,579 [7]   K
Metallicity [Fe/H]−0.07 [7]   dex
Other designations
83 UMa, IQ UMa, BD+55°1625, HD  119228, HIP  66738, HR  5154, SAO  28843 [10]
Database references
SIMBAD data

83 Ursae Majoris is a candidate binary star [11] system in the northern circumpolar constellation of Ursa Major. It is a semiregular variable star, and it has been given the variable star designation IQ Ursae Majoris. It ranges in brightness from apparent visual magnitude 4.69 to 4.75. [3] Percy and Au (1994) identified it as a small amplitude red variable with an irregular behavior, having a characteristic time scale of 20 days. [12] Based upon an annual parallax shift of 6.23±0.22  mas , [2] it is located roughly 520  light years from the Sun. The distance derived from its Gaia Early Data Release 3 parallax is 179 pc. [13] The system is moving closer with a heliocentric radial velocity of −18.6 [6]  km/s.

The visible component is an evolved red giant with a stellar classification of M2 III. [4] It is a marginal barium star, showing an enhanced abundance of s-process elements in its outer atmosphere. This material may have been acquired during a previous mass transfer from a now white dwarf companion, or self-enriched by a dredge-up during the asymptotic giant branch process. [14]

Related Research Articles

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Omicron Ursae Majoris, formally named Muscida, is a star system in the northern circumpolar constellation of Ursa Major. It has an apparent visual magnitude of +3.35 and is located at a distance of around 179 light-years from the Sun. In 2012, an exoplanet designated Omicron Ursae Majoris Ab was found to be orbiting the primary.

<span class="mw-page-title-main">Omega Ursae Majoris</span> Binary system in the constellation Ursa Major

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<span class="mw-page-title-main">Sigma Canis Majoris</span> Variable star in the constellation Canis Major

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<span class="mw-page-title-main">S Antliae</span> Star in the constellation Antlia

S Antliae is a W Ursae Majoris-type eclipsing binary star in Antlia.

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<span class="mw-page-title-main">10 Draconis</span> Star in the constellation Draco

10 Draconis is a single star in the northern circumpolar constellation of Draco. It was a latter designation of 87 Ursae Majoris, and is visible to the naked eye with an apparent visual magnitude of about 4.6. The distance to this star, as determined from its annual parallax shift of 8.2 mas, is around 400 light years. It is moving closer with a heliocentric radial velocity of −12 km/s, and is expected to come to within 84 ly in about 8.6 million years.

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<span class="mw-page-title-main">24 Ursae Majoris</span> Star in the constellation Ursa Major

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<span class="mw-page-title-main">ET Virginis</span> Evolved red giant star in the constellation Virgo

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<span class="mw-page-title-main">65 Ursae Majoris</span> Star system in the constellation Ursa Major

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<span class="mw-page-title-main">MZ Puppis</span> Red supergiant star in the constellation of Puppis

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<span class="mw-page-title-main">TU Ursae Majoris</span>

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HD 59640 is a solitary white hued star located in the southern circumpolar constellation Volans. It has an apparent magnitude of 6.48, placing it near the limit for naked eye visibility. Gaia DR3 parallax measurements place the object at a distance of 262 light years and it is receding with a heliocentric radial velocity of 18.4 km/s. At its current distance, HD 59640's brightness is diminished by three tenths of a magnitude due to interstellar dust.

References

  1. ↑ "Hipparcos Tools Interactive Data Access". Hipparcos. ESA. Retrieved 8 December 2021.
  2. 1 2 3 4 5 6 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv: 0708.1752 , Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID   18759600.
  3. 1 2 3 Samus, N. N.; et al. (2017), "General Catalogue of Variable Stars: Version GCVS 5.1", Astronomy Reports, 61 (1): 80–88, Bibcode:2017ARep...61...80S, doi:10.1134/S1063772917010085, S2CID   125853869.
  4. 1 2 Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", The Astrophysical Journal Supplement Series, 71: 245, Bibcode:1989ApJS...71..245K, doi:10.1086/191373, S2CID   123149047.
  5. 1 2 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.
  6. 1 2 De Bruijne, J. H. J.; Eilers, A.-C. (2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: A61, arXiv: 1208.3048 , Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID   59451347.
  7. 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. (August 2019), "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18", Astronomy & Astrophysics, 628: A94, arXiv: 1904.11302 , Bibcode:2019A&A...628A..94A, doi: 10.1051/0004-6361/201935765 , ISSN   0004-6361.
  8. ↑ Stassun, Keivan G.; et al. (2019-10-01), "The Revised TESS Input Catalog and Candidate Target List", The Astronomical Journal, 158 (4): 138, arXiv: 1905.10694 , Bibcode:2019AJ....158..138S, doi: 10.3847/1538-3881/ab3467 , hdl: 1721.1/124721 , ISSN   0004-6256, S2CID   166227927.
  9. ↑ Chandler, Colin Orion; McDonald, Iain; Kane, Stephen R. (2016), "The Catalog of Earth-Like Exoplanet Survey Targets (CELESTA): A Database of Habitable Zones Around Nearby Stars", The Astronomical Journal, 151 (3): 59, arXiv: 1510.05666 , Bibcode:2016AJ....151...59C, doi: 10.3847/0004-6256/151/3/59 , S2CID   119246448.
  10. ↑ "83 UMa". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2018-03-31.
  11. ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society , 389 (2): 869–879, arXiv: 0806.2878 , Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID   14878976.
  12. ↑ Percy, John R.; Au, Winnie (November 1994), "APT Observations of Small-Amplitude Red Variables", Information Bulletin on Variable Stars, 4114: 1, Bibcode:1994IBVS.4114....1P.
  13. ↑ Bailer-Jones, C. A. L.; Rybizki, J.; Fouesneau, M.; Demleitner, M.; Andrae, R. (2021), "Estimating Distances from Parallaxes. V. Geometric and Photogeometric Distances to 1.47 Billion Stars in Gaia Early Data Release 3", The Astronomical Journal, 161 (3): 147, arXiv: 2012.05220 , Bibcode:2021AJ....161..147B, doi: 10.3847/1538-3881/abd806 , S2CID   228063812.
  14. ↑ Gomez, A. E.; et al. (1997), "Absolute magnitudes and kinematics of barium stars", Astronomy and Astrophysics, 319: 881, Bibcode:1997A&A...319..881G.
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