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巨蟹座VZ

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巨蟹座VZ

巨蟹座VZ的光变曲线图,使用TESS数据绘制[1]
觀測資料
曆元 J2000
星座 巨蟹座
星官
赤經 08h 40m 52.125s[2]
赤緯 +09° 49′ 27.15″[2]
視星等(V) 7.18 to 7.91[3]
特性
光谱分类F2 III[4]
B−V 色指数0.288+0.020
[5]
变星类型δ Sct[3]
天体测定
徑向速度 (Rv)25.2+0.4
[6] km/s
自行 (μ) 赤经:−29.005 mas/yr
赤纬:−15.856 mas/yr
视差 (π)4.5062 ± 0.0268[2] mas
距离724 ± 4 ly
(222 ± 1 pc)
绝对星等 (MV)1.79[5]
詳細資料
質量1.60[7] M
半徑2.90[8] R
表面重力 (log g)3.4+0.2
[4]
亮度15.96[5] L
溫度6,909+219
[7] K
金属量 [Fe/H]−0.41[7] dex
自轉速度 (v sin i)26+1
[4] km/s
年齡1.70[7] Gyr
其他命名
VZ Cnc、​BD+10°1848、​HD 73857、​HIP 42594、​SAO 98035、​PPM 154840[9]
參考資料庫
SIMBAD资料

巨蟹座VZ(英文:VZ Cancri)是一个位于巨蟹座变星。其亮度变化周期为0.178364天,视星等从7.18降至7.91,[3]这低于肉眼可见的典型阈值。根据视差测量,这颗恒星距离我们大约724光年,且其径向速度为每秒25公里,正在远离太阳[6]

这颗恒星于1950年由B. S. Whitney发现其亮度变化,并将其归类为簇型造父变星,[10]或称RR Lyrae型变星。[11]

参考资料

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  1. ^ MAST: Barbara A. Mikulski Archive for Space Telescopes, Space Telescope Science Institute, [22 September 2022], (原始内容存档于2023-03-27). 
  2. ^ 2.0 2.1 2.2 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可免费查阅. doi:10.1051/0004-6361/202039657可免费查阅.  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.
  3. ^ 3.0 3.1 3.2 Samus, N. N.; et al, General Catalogue of Variable Stars, Astronomy Reports, 5.1, 2017, 61 (1): 80–88, Bibcode:2017ARep...61...80S, S2CID 125853869, doi:10.1134/S1063772917010085. 
  4. ^ 4.0 4.1 4.2 Kahraman Aliçavuş, F.; et al, High-resolution spectroscopy and abundance analysis of δ Scuti stars near the γ Doradus instability strip, Monthly Notices of the Royal Astronomical Society, October 2017, 470 (4): 4408–4420, Bibcode:2017MNRAS.470.4408K, arXiv:1706.04782可免费查阅, doi:10.1093/mnras/stx1498. 
  5. ^ 5.0 5.1 5.2 Anderson, E.; Francis, Ch., XHIP: An extended hipparcos compilation, Astronomy Letters, 2012, 38 (5): 331, Bibcode:2012AstL...38..331A, S2CID 119257644, arXiv:1108.4971可免费查阅, doi:10.1134/S1063773712050015. 
  6. ^ 6.0 6.1 Gontcharov, G. A., Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system, Astronomy Letters, November 2006, 32 (11): 759–771, Bibcode:2006AstL...32..759G, S2CID 119231169, arXiv:1606.08053可免费查阅, doi:10.1134/S1063773706110065. 
  7. ^ 7.0 7.1 7.2 7.3 Casagrande, L.; et al, New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey, Astronomy and Astrophysics, June 2011, 530: A138, Bibcode:2011A&A...530A.138C, S2CID 56118016, arXiv:1103.4651可免费查阅, doi:10.1051/0004-6361/201016276. 
  8. ^ Fernley, J. A.; et al, The radii and masses of dwarf cepheids, Monthly Notices of the Royal Astronomical Society, March 1987, 225 (2): 451–468, Bibcode:1987MNRAS.225..451F, doi:10.1093/mnras/225.2.451. 
  9. ^ VZ Cnc. SIMBAD. 斯特拉斯堡天文資料中心. 
  10. ^ Whitney, Balfour S., The Cluster-Type Cepheid HD 73857, Publications of the Astronomical Society of the Pacific, April 1950, 62 (364): 56, Bibcode:1950PASP...62...56W, S2CID 123297233, doi:10.1086/126228. 
  11. ^ Joy, A. H.; Wilson, R. E., The Radial Velocity of HD 73857, Publications of the Astronomical Society of the Pacific, April 1950, 62 (364): 58, Bibcode:1950PASP...62...58J, S2CID 121064818, doi:10.1086/126229. 

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