Gliese 908

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Gliese 908
BRPscLightCurve.png
A visual band light curve for BR Piscium, plotted from ASAS-SN data [1]
Observation data
Epoch J2000        Equinox J2000
Constellation Pisces
Right ascension 23h 49m 12.52790s [2]
Declination 02° 24′ 04.4072″ [2]
Apparent magnitude  (V)8.93 - 9.03 [3]
Characteristics
Spectral type M1V Fe-1 [4]
Variable type BY Dra [3]
Astrometry
Radial velocity (Rv)−71.79 [5]  km/s
Proper motion (μ)RA: 992.665 [5]   mas/yr
Dec.: −968.648 [5]   mas/yr
Parallax (π)169.2163 ± 0.0281  mas [6]
Distance 19.275 ± 0.003  ly
(5.9096 ± 0.0010  pc)
Absolute magnitude  (MV)+10.1 [7]
Details
Mass 0.37 [8]   M☉
Radius 0.39 [9]   R☉
Luminosity (bolometric)0.022 [9]   L☉
Surface gravity (log g)4.86 [9]   cgs
Temperature 3,570 [9]   K
Metallicity [Fe/H]−0.51±0.05 [10]   dex
Rotational velocity (v sin i)2.25 [11]  km/s
Other designations
BR Piscium, BD+01°4774, GJ  908 [12] , HIP  117473 [2] , SAO  128397, PPM  174453, G 29-68, G 31-6, LHS  550 [13] , LTT  17014, PLX  5763 [14] , TYC  586-610-1 [15] , GSC  00586-00610, IRAS 23466+0207, 2MASS J23491255+0224037
Database references
SIMBAD data
Pisces constellation map.svg
Red pog.png
Gliese 908
Location of Gliese 908 in the constellation Pisces

Gliese 908 is a red dwarf star, located in constellation Pisces at 19.3 light-years from Earth. It is a BY Draconis variable star with a variable star designation of BR Piscium. Its apparent magnitude varies between magnitude 8.93 and magnitude 9.03 as a result of starspots and varying chromospheric activity.

The variability of Gliese 908 was confirmed in 1994, although no period could be detected in its brightness changes. [16] It was entered into the General Catalogue of Variable Stars in 1997. [17]

Gliese 908 is a cool main sequence star, a red dwarf, with a spectral class of M1V Fe-1. The suffix indicates a noticeable deficiency in heavy elements. [4]

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References

  1. ↑ "ASAS-SN Variable Stars Database". ASAS-SN Variable Stars Database. ASAS-SN. Retrieved 6 January 2022.
  2. 1 2 3 Perryman; et al. (1997). "HIP 117473". The Hipparcos and Tycho Catalogues.
  3. 1 2 Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1: B/gcvs. Bibcode:2009yCat....102025S.
  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.
  5. 1 2 3 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.
  6. ↑ Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics . 649: A1. arXiv: 2012.01533 . Bibcode:2021A&A...649A...1G. doi: 10.1051/0004-6361/202039657 . S2CID   227254300. (Erratum:  doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  7. ↑ Boro Saikia, S.; et al. (2018), "Chromospheric activity catalogue of 4454 cool stars. Questioning the active branch of stellar activity cycles", Astronomy and Astrophysics, 616: A108, arXiv: 1803.11123 , Bibcode:2018A&A...616A.108B, doi:10.1051/0004-6361/201629518, S2CID   118915212.
  8. ↑ Perger, M.; García-Piquer, A.; Ribas, I.; Morales, J. C.; Affer, L.; Micela, G.; Damasso, M.; Suárez-Mascareño, A.; González-Hernández, J. I.; Rebolo, R.; Herrero, E.; Rosich, A.; Lafarga, M.; Bignamini, A.; Sozzetti, A.; Claudi, R.; Cosentino, R.; Molinari, E.; Maldonado, J.; Maggio, A.; Lanza, A. F.; Poretti, E.; Pagano, I.; Desidera, S.; Gratton, R.; Piotto, G.; Bonomo, A. S.; Martinez Fiorenzano, A. F.; Giacobbe, P.; et al. (2017). "HADES RV Programme with HARPS-N at TNG. II. Data treatment and simulations". Astronomy and Astrophysics. 598: A26. arXiv: 1610.08698 . Bibcode:2017A&A...598A..26P. doi:10.1051/0004-6361/201628985. S2CID   56341358.
  9. 1 2 3 4 Maldonado, J.; Affer, L.; Micela, G.; Scandariato, G.; Damasso, M.; Stelzer, B.; Barbieri, M.; Bedin, L. R.; Biazzo, K.; Bignamini, A.; Borsa, F.; Claudi, R. U.; Covino, E.; Desidera, S.; Esposito, M.; Gratton, R.; González Hernández, J. I.; Lanza, A. F.; Maggio, A.; Molinari, E.; Pagano, I.; Perger, M.; Pillitteri, I.; Piotto, G.; Poretti, E.; Prisinzano, L.; Rebolo, R.; Ribas, I.; Shkolnik, E.; et al. (2015). "Stellar parameters of early-M dwarfs from ratios of spectral features at optical wavelengths". Astronomy and Astrophysics. 577: A132. arXiv: 1503.03010 . Bibcode:2015A&A...577A.132M. doi:10.1051/0004-6361/201525797. S2CID   53582613.
  10. ↑ Lindgren, Sara; Heiter, Ulrike (2017). "Metallicity determination of M dwarfs. Expanded parameter range in metallicity and effective temperature". Astronomy and Astrophysics. 604: A97. arXiv: 1705.08785 . Bibcode:2017A&A...604A..97L. doi:10.1051/0004-6361/201730715. S2CID   119216828.
  11. ↑ 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 .
  12. ↑ Gliese, W.; Jahreiß, H. (1991). "Gl 908". Preliminary Version of the Third Catalogue of Nearby Stars.
  13. ↑ Luyten, Willem Jacob (1979). "LHS 550". LHS Catalogue, 2nd Edition.
  14. ↑ Van Altena W. F.; Lee J. T.; Hoffleit E. D. (1995). "GCTP 5763". The General Catalogue of Trigonometric Stellar Parallaxes (Fourth ed.).
  15. ↑ Perryman; et al. (1997). "HIP 117473". The Hipparcos and Tycho Catalogues.
  16. ↑ Weis, Edward W. (1994). "Long Term Variability in Dwarf M Stars". The Astronomical Journal. 107: 1135. Bibcode:1994AJ....107.1135W. doi:10.1086/116925.
  17. ↑ Kazarovets, E. V.; Samus, N. N. (1997). "The 73rd Name-List of Variable Stars". Information Bulletin on Variable Stars. 4471: 1. Bibcode:1997IBVS.4471....1K.
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