牧夫座ZZ(英语:ZZ Boötis)是牧夫座的一个恒星系统。五天内星等从6.79级升到7.44级。[9]根据盖亚飞船测量的视差,它距离我们大约350光年(110秒差距)。[2]
1950 年,格里戈里·沙因确定这颗恒星是双线光谱双星,周期约为4.96天。 1951年,谢尔盖·加波什金在检查照相底片时发现,这是一个大陵五型食双星系统。[10]主日食和次日食的深度相同,均为0.65等,这意味着亮度下降了近一半。[3]日食仅占轨道周期的6%。[9]
牧夫座ZZ是一个双星系统,特别是食双星。[9]两颗恒星的质量似乎几乎相等,仅相差3%。[5]
- ^ McNamara, D. H.; Hansen, H. K.; Wilcken, S. K. Photometry of the Eclipsing Star ZZ Bootis. Publications of the Astronomical Society of the Pacific. April 1971, 83 (492): 192 [7 November 2021]. Bibcode:1971PASP...83..192M. S2CID 119982496. doi:10.1086/129099 . (原始内容存档于2021-11-07).
- ^ 2.0 2.1 2.2 2.3 2.4 2.5 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中此天体在盖亚望远镜第二批数据发布的记录
- ^ 3.0 3.1 3.2 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. Bibcode:2009yCat....102025S.
- ^ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 Cester, B.; Giuricin, G.; Mardirossian, F.; Mezzetti, M. Revised spectrographic and photometric elements of ZZ Boo. Astronomy and Astrophysics Supplement Series. 1978, 32: 347–350. Bibcode:1978A&AS...32..347C.
- ^ 5.0 5.1 Popper, D. M. The F-type eclipsing binaries ZZ Bootis, CW Eridani, and BK Pegasi. Astronomical Journal. 1983, 88: 1242–56. Bibcode:1983AJ.....88.1242P. ISSN 0004-6256. doi:10.1086/113415.
- ^ Pourbaix, D.; Tokovinin, A. A.; Batten, A. H.; Fekel, F. C.; Hartkopf, W. I.; Levato, H.; Morrell, N. I.; Torres, G.; Udry, S. SB9: The ninth catalogue of spectroscopic binary orbits. Astronomy and Astrophysics. 2004, 424 (2): 727–732. Bibcode:2004A&A...424..727P. S2CID 119387088. arXiv:astro-ph/0406573 . doi:10.1051/0004-6361:20041213.
- ^ 7.0 7.1 7.2 7.3 7.4 7.5 7.6 Kang, Young-Woon; Yushchenko, Alexander; Hong, Kyengsoo; Kim, Sungeun; Yushchenko, Volodymyr. Chemical Composition of the Components of Eclipsing Binary Star ZZ Bootis. The Astronomical Journal. 2012, 144 (2): 35–45. Bibcode:2012AJ....144...35K. doi:10.1088/0004-6256/144/2/35 .
- ^ ZZ Boo. SIMBAD. 斯特拉斯堡天文資料中心.
- ^ 9.0 9.1 9.2 Watson, Christopher. ZZ Boötis. AAVSO Website. American Association of Variable Star Observers. 4 January 2010 [5 August 2014]. (原始内容存档于2021-02-14).
- ^ Gaposchkin, S. The system of RZ Eridani and a new bright eclipsing variable with double-lined spectrum. The Astronomical Journal. 1951, 56: 125. Bibcode:1951AJ.....56..125G. doi:10.1086/106546 .