维基百科

ADS 7251

ADS 7251是一个位于大熊座的双星系统，距离太阳有6.33秒差距(20.66光年）。

ADS 7251
观测数据
历元 J2000      分点 J2000
星座 大熊座
ADS 7251 A
赤经 09h 14m 22.7749s[1]
赤纬 52° 41′ 11.792″[1]
视星等 (V) 7.64[2]
ADS 7251 B
赤经 09h 14m 24.6828s[3]
赤纬 52h 41m 10.902s[3]
视星等 (V) 7.70[2]
特性
光谱分类M0V[4]
视星等 (B)9.05[2]
视星等 (G)6.976[1]
视星等 (J)4.89[a][5]
视星等 (H)3.987[a][5]
视星等 (K)3.99[a][5]
B−V 色指数+1.41[6]
J−H 色指数+0.90[b]
J−K 色指数+0.90[b]
天体测定
ADS 7251 A (HD 79210)
径向速度 (Rv)11.245±0.0007[1] km/s
自行 (μ) 赤经：−1,545.787±0.018[1] mas/yr
赤纬：−569.053±0.018[1] mas/yr
视差 (π)157.8879 ± 0.0197[1] mas
距离20.657 ± 0.003 ly
(6.3336 ± 0.0008 pc)
绝对星等 (MV)8.637[7]
ADS 7251 B
径向速度 (Rv)12.104±0.0008[3] km/s
自行 (μ) 赤经：−1,573.040±0.018[3] mas/yr
赤纬：−659.906±0.018[3] mas/yr
视差 (π)157.8825 ± 0.0211[3] mas
距离20.658 ± 0.003 ly
(6.3338 ± 0.0008 pc)
绝对星等 (MV)8.712[7]
轨道[8]
绕行周期 (P)975 yr
半长轴 (a)16.725"
偏心率 (e)0.28
详细资料 [9]
A
质量0.69±0.07 M☉
半径0.58±0.02 R☉
表面重力 (log g)4.68±0.07
亮度0.0789±0.0038 L☉
温度4,024±51 K
自转16.3+3.5
−1.3
自转速度 (v sin i)2.0±1.2 km/s
B
质量0.64±0.07 M☉
半径0.58±0.03 R☉
表面重力 (log g)4.68±0.07
亮度0.0792±0.0031 L☉
温度4,005±51 K
自转16.61±0.04
自转速度 (v sin i)2.3±1.5 km/s
年龄1–7 Gyr
Other designations
GJ 338、​ADS 7251、​WDS J09144+5241
A: BD+53°1320、​HD 79210、​HIP 45343
B: BD+53°1321、​HD 79211、​HIP 120005
参考数据库
SIMBADThe system
A
B
ADS 7251 is located in the constellation Ursa Major
ADS 7251 is located in the constellation Ursa Major
ADS 7251
ADS 7251在大熊座的位置

这两颗恒星共享一个略微偏心的轨道，其半长轴为16.725″，周期为975年。[10]

ADS 7251 A比ADS 7251 B亮0.06星等。MK光谱等级目录将两颗恒星列为二级标准，ADS 7251 A为M0V级，ADS 7251 B为K7V级，在具有较晚光谱类型的较亮恒星。[4]

行星系统

编辑

ADS 7251 B也称为Gliese 338B或 HD 79211，由一颗已知的超级地球围绕其运行，并通过径向速度检测到。[9]

ADS 7251 B (Gliese 338 B)的行星系[11]
成员
(依恒星距离) 		质量 半长轴
(AU) 		轨道周期
(天) 		离心率 倾角 半径
b 10.8+1.2
− M⊕ 		0.142+0.005
− 		24.422+0.014
− 		0.11+0.11
−0.08 		— —

注释

编辑
  1. ^ 1.0 1.1 1.2 2MASS infrared magnitudes flagged as unreliable or upper limits
  2. ^ 2.0 2.1 Calculated from 2MASS magnitudes

参考

编辑
  1. ^ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 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  .  已忽略未知参数|collaboration= (帮助) (勘误: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  2. ^ 2.0 2.1 2.2 Huang, Y.; Liu, X. -W.; Yuan, H. -B.; Xiang, M. -S.; Chen, B. -Q.; Zhang, H. -W. Empirical metallicity-dependent calibrations of effective temperature against colours for dwarfs and giants based on interferometric data. Monthly Notices of the Royal Astronomical Society. 2015, 454 (3): 2863. Bibcode:2015MNRAS.454.2863H. S2CID 118487917. arXiv:1508.06080  . doi:10.1093/mnras/stv1991. 
  3. ^ 3.0 3.1 3.2 3.3 3.4 3.5 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. ^ 4.0 4.1 Kirkpatrick, J. D.; et al. A standard stellar spectral sequence in the red/near-infrared - Classes K5 to M9. Astrophysical Journal Supplement Series. 1991, 77: 417. Bibcode:1991ApJS...77..417K. doi:10.1086/191611. 
  5. ^ 5.0 5.1 5.2 Cutri, Roc M.; Skrutskie, Michael F.; Van Dyk, Schuyler D.; Beichman, Charles A.; Carpenter, John M.; Chester, Thomas; Cambresy, Laurent; Evans, Tracey E.; Fowler, John W.; Gizis, John E.; Howard, Elizabeth V.; Huchra, John P.; Jarrett, Thomas H.; Kopan, Eugene L.; Kirkpatrick, J. Davy; Light, Robert M.; Marsh, Kenneth A.; McCallon, Howard L.; Schneider, Stephen E.; Stiening, Rae; Sykes, Matthew J.; Weinberg, Martin D.; Wheaton, William A.; Wheelock, Sherry L.; Zacarias, N. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003). CDS/ADC Collection of Electronic Catalogues. 2003, 2246: II/246 [2023-03-22]. Bibcode:2003yCat.2246....0C. （原始内容存档于2021-04-21）. 
  6. ^ Bobylev, V. V.; Goncharov, G. A.; Bajkova, A. T. VizieR Online Data Catalog: Orion Spiral Arm CAtalogue (OSACA) (Bobylev+, 2006). VizieR On-line Data Catalog. 2007. Bibcode:2007yCat..90830821B. 
  7. ^ 7.0 7.1 Houdebine, Éric R.; Mullan, D. J.; Doyle, J. G.; de la Vieuville, Geoffroy; Butler, C. J.; Paletou, F. The Mass-Activity Relationships in M and K Dwarfs. I. Stellar Parameters of Our Sample of M and K Dwarfs. The Astronomical Journal. 2019, 158 (2): 56. Bibcode:2019AJ....158...56H. S2CID 159041104. arXiv:1905.07921  . doi:10.3847/1538-3881/ab23fe. 
  8. ^ Malkov, O. Yu.; et al. Dynamical Masses of a Selected Sample of Orbital Binaries. Astronomy & Astrophysics. 2012, 546: 5. Bibcode:2012A&A...546A..69M. doi:10.1051/0004-6361/201219774  . A69. 
  9. ^ 9.0 9.1 González-Álvarez, E.; Osorio, M. R. Zapatero; Caballero, J. A.; Sanz-Forcada, J.; Béjar, V. J. S.; González-Cuesta, L.; Dreizler, S.; Bauer, F. F.; Rodríguez, E.; Tal-Or, L.; Zechmeister, M. The CARMENES search for exoplanets around M dwarfs. A super-Earth planet orbiting HD 79211 (GJ 338 B). Astronomy & Astrophysics. May 2020, 637: A93. Bibcode:2020A&A...637A..93G. ISSN 0004-6361. arXiv:2003.13052  . doi:10.1051/0004-6361/201937050  . 
  10. ^ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog. The Astronomical Journal. 2001, 122 (6): 3466–3471. Bibcode:2001AJ....122.3466M. doi:10.1086/323920  . 
  11. ^ Ditomasso, Victoria; et al, Independent Validation of the Temperate Super-Earth HD 79211 b using HARPS-N, The Astronomical Journal, 2023, 165 (2): 38, Bibcode:2023AJ....165...38D, S2CID 253098124, arXiv:2210.12211  , doi:10.3847/1538-3881/ac9ccd 
检索自“https://zh.wikipedia.org/w/index.php?title=ADS_7251&oldid=77618086”