LP 71-82是一顆位於天龍座的紅矮星。距離地球25.42光年[3]在運動學上,它可能屬於大熊座移動星群[6]

LP 71-82

LP 71-82的R波段光變曲線顯示耀斑[1]
觀測資料
曆元 J2000.0
星座 天龍座
星官
赤經 18h 02m 16.60s
赤緯 64° 15′ 44.6″
視星等(V) 13.51[1]
特性
光譜分類M5.0V
視星等 (J)8.54[2]
天體測定
自行 (μ) 赤經:196.394 mas/yr
赤緯:-383.789 mas/yr
視差 (π)128.3057 ± 0.0319[3] mas
距離25.420 ± 0.006 ly
(7.794 ± 0.002 pc)
詳細資料 [4]
質量0.16+0.01
M
半徑0.195+0.002
R
表面重力 (log g)4.5[5]
亮度0.0033+0.0003
L
溫度3124+51
K
自轉0.28018+0.000010
d
自轉速度 (v sin i)11.3+1.5
km/s
年齡0.5+1.1
−0.34
Gyr
其他命名
G 227-22、​LP 71-82、​LSPM J1802+6415、​NLTT 45873、​GSC 04209-01465、​2MASS J18021660+6415445
參考資料庫
SIMBAD資料

多重調查沒有發現 LP 71-82在2014年有任何恆星伴星。[7]

物理特性

LP 71-82是一顆活動非常強烈的耀星,[1]到2019年至少檢測到四次耀斑。[5]對於一顆只有6小時的短自轉週期的恆星來說,預計會有這樣的活動。[4] [8]

參考資料

  1. ^ 1.0 1.1 1.2 Mt. Suhora Survey – Searching for Pulsating M Dwarfs. III (PDF). [2023-04-01]. (原始內容存檔 (PDF)於2022-06-29). 
  2. ^ Reiners, A.; et al, The CARMENES search for exoplanets around M dwarfs, Astronomy & Astrophysics, 2017, 612: A49, arXiv:1711.06576 , doi:10.1051/0004-6361/201732054 
  3. ^ 3.0 3.1 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.
  4. ^ 4.0 4.1 Robertson, Paul; Stefansson, Gudmundur; Mahadevan, Suvrath; Endl, Michael; Cochran, William D.; Beard, Corey; Bender, Chad F.; Diddams, Scott A.; Duong, Nicholas; Ford, Eric B.; Fredrick, Connor; Halverson, Samuel; Hearty, Fred; Holcomb, Rae; Juan, Lydia; Kanodia, Shubham; Lubin, Jack; Metcalf, Andrew J.; Monson, Andrew; Ninan, Joe P.; Palafoutas, Jonathan; Ramsey, Lawrence W.; Roy, Arpita; Schwab, Christian; Terrien, Ryan C.; Wright, Jason T., Persistent Starspot Signals on M Dwarfs: Multiwavelength Doppler Observations with the Habitable-zone Planet Finder and Keck/HIRES, The Astrophysical Journal, 2020, 897 (2): 125, Bibcode:2020ApJ...897..125R, S2CID 218718929, arXiv:2005.09657 , doi:10.3847/1538-4357/ab989f 
  5. ^ 5.0 5.1 Rodríguez Martínez, Romy; Lopez, Laura A.; Shappee, Benjamin J.; Schmidt, Sarah J.; Jayasinghe, Tharindu; Kochanek, Christopher S.; Auchettl, Katie; Holoien, Thomas W.-S., A Catalog of M-dwarf Flares with ASAS-SN, The Astrophysical Journal, 2019, 892 (2): 144, S2CID 209323915, arXiv:1912.05549 , doi:10.3847/1538-4357/ab793a 
  6. ^ Reliable probabilistic determination of membership in stellar kinematic groups in the young disk, Table 4. [2023-04-01]. (原始內容存檔於2020-10-28). 
  7. ^ Janson, Markus; Bergfors, Carolina; Brandner, Wolfgang; Kudryavtseva, Natalia; Hormuth, Felix; Hippler, Stefan; Henning, Thomas, The Astralux Multiplicity Survey: Extension to Late M-Dwarfs, The Astrophysical Journal, 2014, 789 (2): 102, Bibcode:2014ApJ...789..102J, S2CID 118403775, arXiv:1406.0535 , doi:10.1088/0004-637X/789/2/102 
  8. ^ Shulyak, D.; Reiners, A.; Nagel, E.; Tal-Or, L.; Caballero, J. A.; Zechmeister, M.; Béjar, V. J. S.; Cortés-Contreras, M.; Martin, E. L.; Kaminski, A.; Ribas, I.; Quirrenbach, A.; Amado, P. J.; Anglada-Escudé, G.; Bauer, F. F.; Dreizler, S.; Guenther, E. W.; Henning, T.; Jeffers, S. V.; Kürster, M.; Lafarga, M.; Montes, D.; Morales, J. C.; Pedraz, S., Magnetic fields in M dwarfs from the CARMENES survey, Astronomy & Astrophysics, 2019, 626: A86, Bibcode:2019A&A...626A..86S, S2CID 139101130, arXiv:1904.12762 , doi:10.1051/0004-6361/201935315