Английская Википедия:Delta1 Tauri
Шаблон:Other stars by Bayer designation Шаблон:Starbox begin Шаблон:Starbox image Шаблон:Starbox observe Шаблон:Starbox character Шаблон:Starbox astrometry Шаблон:Starbox orbit Шаблон:Starbox detail Шаблон:Starbox catalog Шаблон:Starbox reference Шаблон:Starbox end Delta¹ Tauri (δ¹ Tauri, abbreviated Delta¹ Tau, δ¹ Tau) is a double star in the zodiac constellation of Taurus. Based upon an annual parallax shift of 20.96 mas as seen from Earth,[1] it is located roughly 156 light-years distant from the Sun. The system is faintly visible to the naked eye with a combined apparent visual magnitude of +3.772.[2] It is considered a member of the Hyades cluster.[3]
The two constituents are designated δ¹ Tauri A and B. A is itself a binary star with components designated δ¹ Tauri Aa (officially named Secunda Hyadum Шаблон:IPAc-en, the traditional name for the entire system)[4] and Ab.
Nomenclature
δ¹ Tauri (Latinised to Delta¹ Tauri) is the system's Bayer designation. The designations of the two constituents as Delta¹ Tauri A and B, and those of A's components - Delta¹ Tauri Aa and Ab - derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU).[5]
The system bore the traditional name Hyadum II, which is Latin for "Second of the Hyades".[6] In 2016, the IAU organized a Working Group on Star Names (WGSN)[7] to catalog and standardize proper names for stars. The WGSN decided to attribute proper names to individual stars rather than entire multiple systems.[8] It approved the name Secunda Hyadum for the component Delta¹ Tauri Aa on 5 September 2017 and it is now so included in the List of IAU-approved Star Names.[4]
In Chinese, Шаблон:Lang (Шаблон:Lang), meaning Net, refers to an asterism consisting of δ¹ Tauri, Epsilon Tauri, Delta³ Tauri, Gamma Tauri, Alpha Tauri (Aldebaran), 71 Tauri and Lambda Tauri.[9] Consequently, the Chinese name for Delta¹ Tauri itself is Шаблон:Lang (Шаблон:Lang), "the Third Star of Net".[10]
Properties
Delta¹ Tauri A is a single-lined spectroscopic binary with an orbital period of 529.8 days and an eccentricity of 0.42.[11] The visible member, component Aa, is an evolved G- or K-type giant star with a stellar classification of Шаблон:Nowrap.[12] The 'CN0.5' suffix indicates a mild overabundance of cyanogen in the outer atmosphere. It is chromospherically active and shows a radial velocity variation of Шаблон:Val with a period of Шаблон:Val.[3] The primary, component Aa, has 2.8 times the mass of the Sun, while the secondary, component Ab, has 1.3 times the Sun's mass.[3]
Delta¹ Tauri B is a magnitude 13.21 visual companion separated by 111.8 arcseconds from A.[13] It is most likely not physically related to the main star.[14]
References
- ↑ Ошибка цитирования Неверный тег
<ref>
; для сносокvanLeeuwen2007
не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>
; для сносокJennens1975
не указан текст - ↑ 3,0 3,1 3,2 Ошибка цитирования Неверный тег
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; для сносокBeck2015
не указан текст - ↑ 4,0 4,1 Шаблон:Cite web
- ↑ Шаблон:Cite arXiv
- ↑ Ошибка цитирования Неверный тег
<ref>
; для сносокKaler
не указан текст - ↑ Шаблон:Cite web
- ↑ Шаблон:Cite web
- ↑ Шаблон:In lang 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, Шаблон:ISBN.
- ↑ Шаблон:In lang 香港太空館 - 研究資源 - 亮星中英對照表 Шаблон:Webarchive, Hong Kong Space Museum. Accessed on line November 23, 2010.
- ↑ Ошибка цитирования Неверный тег
<ref>
; для сносокPourbaix2004
не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>
; для сносокperkins1989
не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>
; для сносокWDSC2014
не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>
; для сносокEggleton2008
не указан текст
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