維基百科

格利澤908

格利澤908是一顆位於雙魚座的紅矮星，距離地球19.3光年。它是一顆天龍座BY型變星，變星編號為BR Piscium。由於星斑和不同的色球活動，它的視星等在8.93和9.03之間變化。

Gliese 908

格利澤908的可見光變曲線[1]
觀測資料
曆元 J2000
星座 雙魚座
星官
赤經 23h 49m 12.52790s[2]
赤緯 02° 24′ 04.4072″[2]
視星等（V） 8.93 - 9.03[3]
特性
光譜分類M1V Fe-1[4]
變星類型BY Dra[3]
天體測定
徑向速度 (Rv)−71.79[5] km/s
自行 (μ) 赤經：992.665[5] mas/yr
赤緯：−968.648[5] mas/yr
視差 (π)169.2163 ± 0.0281[6] mas
距離19.275 ± 0.003 ly
(5.9096 ± 0.0010 pc)
絕對星等 (MV)+10.1[7]
詳細資料
質量0.37[8] M☉
半徑0.39[9] R☉
表面重力 (log g)4.86[9]
亮度 (bolometric)0.022[9] L☉
溫度3,570[9] K
金屬量 [Fe/H]−0.51±0.05[10] dex
自轉速度 (v sin i)2.25[11] km/s
其他命名
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
參考資料庫
SIMBAD資料
Gliese 908 is located in the constellation Pisces
Gliese 908 is located in the constellation Pisces
Gliese 908
格利澤908在雙魚座的位置

格利澤908的可變性在1994年得到確認，儘管其亮度變化沒有檢測到週期性。[16]1997年進入變星總表。[17]

格利澤908是一顆主序星，光譜等級為M1V Fe-1。後綴表示明顯缺乏重元素。[4]

參考

  1. ^ ASAS-SN Variable Stars Database. ASAS-SN Variable Stars Database. ASAS-SN. [6 January 2022]. （原始內容存檔於2023-01-11）. 
  2. ^ 2.0 2.1 2.2 Perryman; et al. HIP 117473. The Hipparcos and Tycho Catalogues. 1997 [2023-03-21]. （原始內容存檔於2016-03-04）. 
  3. ^ 3.0 3.1 Samus, N. N.; Durlevich, O. V.; et al. VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013). VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 2009, 1: B/gcvs. Bibcode:2009yCat....102025S. 
  4. ^ 4.0 4.1 Keenan, Philip C.; McNeil, Raymond C. The Perkins Catalog of Revised MK Types for the Cooler Stars. The Astrophysical Journal Supplement Series. 1989, 71: 245. Bibcode:1989ApJS...71..245K. doi:10.1086/191373. 
  5. ^ 5.0 5.1 5.2 Brown, A. G. A.; Vallenari, A.; Prusti, T.; de Bruijne, J. H. J.; et al. Gaia Data Release 2. Summary of the contents and survey properties. Astronomy & Astrophysics. 2018. Bibcode:2018A&A...616A...1G. arXiv:1804.09365  . doi:10.1051/0004-6361/201833051.  VizieR中此天體在蓋亞望遠鏡第二批數據發布的記錄
  6. ^ Brown, A. G. A.; et al. Gaia Early Data Release 3: Summary of the contents and survey properties. Astronomy & Astrophysics. 2021, 649: A1. Bibcode:2021A&A...649A...1G. S2CID 227254300. arXiv:2012.01533  . doi:10.1051/0004-6361/202039657  .  已忽略未知參數|collaboration= (幫助) (勘誤: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  7. ^ Boro Saikia, S.; et al, Chromospheric activity catalogue of 4454 cool stars. Questioning the active branch of stellar activity cycles, Astronomy and Astrophysics, 2018, 616: A108, Bibcode:2018A&A...616A.108B, S2CID 118915212, arXiv:1803.11123  , doi:10.1051/0004-6361/201629518. 
  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. HADES RV Programme with HARPS-N at TNG. II. Data treatment and simulations. Astronomy and Astrophysics. 2017, 598: A26. Bibcode:2017A&A...598A..26P. S2CID 56341358. arXiv:1610.08698  . doi:10.1051/0004-6361/201628985. 
  9. ^ 9.0 9.1 9.2 9.3 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. Stellar parameters of early-M dwarfs from ratios of spectral features at optical wavelengths. Astronomy and Astrophysics. 2015, 577: A132. Bibcode:2015A&A...577A.132M. S2CID 53582613. arXiv:1503.03010  . doi:10.1051/0004-6361/201525797. 
  10. ^ Lindgren, Sara; Heiter, Ulrike. Metallicity determination of M dwarfs. Expanded parameter range in metallicity and effective temperature. Astronomy and Astrophysics. 2017, 604: A97. Bibcode:2017A&A...604A..97L. S2CID 119216828. arXiv:1705.08785  . doi:10.1051/0004-6361/201730715. 
  11. ^ Houdebine, E. R. Observation and modelling of main-sequence star chromospheres - XIV. Rotation of dM1 stars. Monthly Notices of the Royal Astronomical Society. 2010, 407 (3): 1657–1673. Bibcode:2010MNRAS.407.1657H. doi:10.1111/j.1365-2966.2010.16827.x  . 
  12. ^ Gliese, W.; Jahreiß, H. Gl 908. Preliminary Version of the Third Catalogue of Nearby Stars. 1991 [2023-03-21]. （原始內容存檔於2016-03-04）. 
  13. ^ Luyten, Willem Jacob. LHS 550. LHS Catalogue, 2nd Edition. 1979 [2023-03-21]. （原始內容存檔於2020-09-25）. 
  14. ^ Van Altena W. F.; Lee J. T.; Hoffleit E. D. GCTP 5763. The General Catalogue of Trigonometric Stellar Parallaxes Fourth. 1995 [2023-03-21]. （原始內容存檔於2016-03-04）. 
  15. ^ Perryman; et al. HIP 117473. The Hipparcos and Tycho Catalogues. 1997 [2023-03-21]. （原始內容存檔於2016-03-04）. 
  16. ^ Weis, Edward W. Long Term Variability in Dwarf M Stars. The Astronomical Journal. 1994, 107: 1135. Bibcode:1994AJ....107.1135W. doi:10.1086/116925. 
  17. ^ Kazarovets, E. V.; Samus, N. N. The 73rd Name-List of Variable Stars. Information Bulletin on Variable Stars. 1997, 4471: 1. Bibcode:1997IBVS.4471....1K. 
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