LP 71-82
天球赤道座標：
18h 02m 16.60s，+64° 15′ 44.6″
| 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 | |
| 光谱分类 | M5.0V |
| 视星等 (J) | 8.54[2] |
| 天体测定 | |
| 自行 (μ) | 赤经：196.394 mas/yr 赤纬：-383.789 mas/yr |
| 视差 (π) | 128.3057 ± 0.0319[3] mas |
| 距离 | 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 | |
| 參考資料庫 | |
| SIMBAD | 资料 |
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]
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
- ^ 1.0 1.1 1.2 Mt. Suhora Survey – Searching for Pulsating M Dwarfs. III (PDF). [2023-04-01]. （原始内容存档 (PDF)于2022-06-29）.
- ^ 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
- ^ 3.0 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 . 已忽略未知参数
|collaboration=(帮助) (勘误: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR. - ^ 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
- ^ 5.0 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
- ^ Reliable probabilistic determination of membership in stellar kinematic groups in the young disk, Table 4. [2023-04-01]. （原始内容存档于2020-10-28）.
- ^ 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
- ^ 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
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