Gliese 2

Last updated
Gliese 2
Observation data
Epoch J2000        Equinox J2000
Constellation Andromeda [1]
Right ascension 00h 05m 10.8892s [2]
Declination +45° 47′ 11.640″ [2]
Apparent magnitude  (V)9.949 [3]
Characteristics
Evolutionary stage main sequence [3]
Spectral type dM1.8 [3]
U−B color index +1.18 [4]
B−V color index +1.50 [4]
Astrometry
Radial velocity (Rv)−0.39±0.09 [5] km/s
Proper motion (μ)RA: 870.753±0.057 [2] mas/yr
Dec.: −151.267±0.036 [2] mas/yr
Parallax (π)86.9567±0.0407  mas [2]
Distance 37.51 ± 0.02  ly
(11.500 ± 0.005  pc)
Absolute magnitude  (MV)+9.65 [3]
Details
Mass 0.50 [6]   M☉
Radius 0.508±0.027 [3]   R☉
Luminosity 0.041 [6]   L☉
Surface gravity (log g)4.76 [6]   cgs
Temperature 3,674 [3]   K
Metallicity [Fe/H]−0.14 [6]   dex
Rotation 15.37±0.09 [7] days
Rotational velocity (v sin i)2.76 [8]  km/s
Age <1 [9]   Gyr
Other designations
HIP 428, GJ 2, CCDM J00057+4548F, WDS J00057+4549F
Database references
SIMBAD data

Gliese 2 is a red dwarf star in the constellation Andromeda. [1] The star is located at 11.5 parsecs (38 light-years ) from Earth. It is often associated with the binary star system ADS 48, with a similar distance and proper motions with this system, suggesting both may be gravitationally bound. However, it is moving faster than the escape velocity of the system, and its velocity is much faster than expected for a bound star, and thus it is not considered a companion of ADS 48. [10]

References

  1. 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. XHIP 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 Houdebine, Éric R.; Mullan, D. J.; Doyle, J. G.; de la Vieuville, Geoffroy; Butler, C. J.; Paletou, F. (2019). "The Mass-Activity Relationships in M and K Dwarfs. I. Stellar Parameters of Our Sample of M and K Dwarfs". The Astronomical Journal. 158 (2): 56. arXiv: 1905.07921 . Bibcode:2019AJ....158...56H. doi: 10.3847/1538-3881/ab23fe .
  4. 1 2 Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode:1986EgUBV........0M.
  5. ↑ Nidever, David L.; Marcy, Geoffrey W.; Butler, R. Paul; Fischer, Debra A.; Vogt, Steven S. (2002). "Radial Velocities for 889 Late-Type Stars". The Astrophysical Journal Supplement Series. 141 (2): 503–522. arXiv: astro-ph/0112477 . Bibcode:2002ApJS..141..503N. doi:10.1086/340570. S2CID   51814894.
  6. 1 2 3 4 Maldonado, J.; Micela, G.; Baratella, M.; d'Orazi, V.; Affer, L.; Biazzo, K.; Lanza, A. F.; Maggio, A.; González Hernández, J. I.; Perger, M.; Pinamonti, M.; Scandariato, G.; Sozzetti, A.; Locci, D.; Di Maio, C.; Bignamini, A.; Claudi, R.; Molinari, E.; Rebolo, R.; Ribas, I.; Toledo-Padrón, B.; Covino, E.; Desidera, S.; Herrero, E.; Morales, J. C.; Suárez-Mascareño, A.; Pagano, I.; Petralia, A.; Piotto, G.; Poretti, E. (2020). "HADES RV programme with HARPS-N at TNG. XII. The abundance signature of M dwarf stars with planets". Astronomy and Astrophysics. 644: A68. arXiv: 2010.14867 . Bibcode:2020A&A...644A..68M. doi:10.1051/0004-6361/202039478.
  7. ↑ Díez Alonso, E.; et al. (January 2019). "CARMENES input catalogue of M dwarfs". Astronomy and Astrophysics. 621 A126. arXiv: 1810.03338 . Bibcode: 2019A&A...621A.126D . doi: 10.1051/0004-6361/201833316 . Vizier catalog entry
  8. ↑ Houdebine, E. R. (2010). "Observation and modelling of main-sequence star chromospheres - XIV. Rotation of dM1 stars". Monthly Notices of the Royal Astronomical Society. 407 (3): 1657–1673. Bibcode:2010MNRAS.407.1657H. doi: 10.1111/j.1365-2966.2010.16827.x .
  9. ↑ Makarov, V. V.; Zacharias, N.; Hennessy, G. S. (November 2008). "Common Proper Motion Companions to Nearby Stars: Ages and Evolution". The Astrophysical Journal. 687 (1): 566–578. doi:10.1086/591638. ISSN   0004-637X.
  10. ↑ Cvetković, Z.; et al. (2012). "System ADS 48: Visual Binary or Multiple System". The Astronomical Journal. 144 (3) 80. Bibcode: 2012AJ....144...80C . doi: 10.1088/0004-6256/144/3/80 . S2CID   120045704.


This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.