Pollux b
| Pollux b | |
|---|---|
 | |
Observation (en)  | |
| Parent astronomical body (en) |
Pollux (en) |
| Discoverer (en) |
Artie P. Hatzes (en) |
| Time of discovery or invention (en) | Kuskuren bayani: Kalma ba fahimta "oktoba"., 2006 |
| Constellation (en) |
Gemini (en) |
| Orbit (en) | |
| Semi-major axis of an orbit (en) | 1.61 AU |
| Orbital eccentricity (en) | 0.011 |
| Orbital period (en) | 596.6 rana |
| Argument of periapsis (en) | 167.7 ° |
| Physics (en) | |
| Nauyi | 2.9 M_J |
Pollux b, wanda ake kira Thestias //ˈθɛstiəs/ /, dan takarar duniyar da ke kewaye da taurari Pollux kimanin shekaru haske 34 a cikin tauraron Gemini (Twins). Har ila yau an sanya shi β Geminorum b (Latinized to Beta Geminorumb, abbreviated β Gem b) ko HD 62509 b. Idan wannan duniyar ta wanzu, tana da mafi ƙarancin taro kusan sau biyu na Jupiter, kuma tana motsawa a kusa da Pollux a cikin shekaru 1.61 a nesa da 1.1.64 a cikin kusan zagaye. Koyaya, an yi jayayya da wanzuwarsa.
Tarihin abubuwan lura
[gyara sashe | gyara masomin]An sanar da gano Pollux b a cikin 2006 ta hanyar masanin taurari Artie P. Hatzes da co-authors ta amfani da Hanyar saurin radial. Hatzes ya riga ya yi la'akari da duniyar da ke kewaye da Pollux a 1993, kodayake a wannan lokacin an yi tunanin cewa bambancin saurin radial ya haifar da bambancin tauraron.
Wani binciken mai zaman kansa da aka buga jim kadan bayan takardar binciken ta goyi bayan wanzuwar Pollux b, amma ta nuna rashin tabbas, ta bar bayanin da ba na duniya ba game da bambancin saurin radial mai yiwuwa. Wani binciken mai zaman kansa a cikin 2008 ya kuma goyi bayan duniyar.
An yi tambaya game da wanzuwar duniyar ta hanyar binciken biyu da suka biyo baya, daya a cikin 2013 da kuma bin sa na 2021. An gano wani filin magnetic mai rauni a cikin Pollux a cikin shekara ta 2009, kuma an ba da shawarar cewa bambancin magnetic a cikin tauraron, sabanin duniyar, na iya zama dalilin bambancin saurin radial da aka lura. An gano lokacin juyawa na taurari yana kusa da lokacin da aka tsara na Pollux b, yana jefa wasu shakku game da wanzuwar duniyar. Binciken 2021 ya sa ido kan Pollux na tsawon shekaru 4.25 kuma ya gano lokacin juyawa ya zama 660±15 d, kusa da lokacin Pollux b na kwanaki 590. Kodayake dabi'un biyu ba daidai ba ne, har yanzu ana iya samun kurakurai na tsari a cikin lokacin juyawa.
Sunayen
[gyara sashe | gyara masomin]A watan Yulin 2014 Ƙungiyar Astronomical ta Duniya ta ƙaddamar da NameExoWorlds, tsari don ba da sunayen da suka dace ga wasu taurari da taurari masu karɓar bakinsu.[1] Shirin ya haɗa da gabatarwa ta jama'a da jefa kuri'a don sabbin sunayen.[2] A watan Disamba na shekara ta 2015, IAU ta sanar da sunan da ya lashe shi ne Thestias don wannan duniyar.[3] Sunan da ya ci nasara ya dogara ne akan wanda SkyNet na Ostiraliya ya gabatar; wato Leda, mahaifiyar Pollux a cikin tatsuniyoyin Helenanci da Roman. A buƙatar IAU, an maye gurbin 'Thestias' (sunan Leda, 'yar Thestius). Wannan ya faru ne saboda an riga an danganta 'Leda' ga wani asteroid da kuma daya daga cikin tauraron dan adam na Jupiter. [4][5]