Nu Indi
| Nu Indi | |
|---|---|
Observation (en)  | |
| Nisa daga duniya | 28.4672 pc |
| Apparent magnitude (en) | 5.29, 5.94, 4.146, 3.59, 3.543 da 5.058334 |
| Absolute magnitude (en) | 2.99 |
| Spectral class (en) | G9VFe-3.1CH-1.5 |
| Metallicity (en) | −1.63 |
| Constellation (en) |
Indus (en) |
| Radial velocity (en) | 32.51 km/s |
| Physics (en) | |
| Radius (en) |
2.43 solar radius (en) |
Nu Indi tauraruwa na kudancin tauraron Indus . Tare da girman gani na +5.278, ana iya ganinsa da ido a cikin isasshen sararin samaniya. Dangane da ma'aunin parallax, tauraron yana da shekaru 92.8 daga nesa.
Halaye
[gyara sashe | gyara masomin]Gidan wannan tauraron ya dace da rarrabuwa na G9V Fe-3.1CH-1.5, tare da bayanin G9V wanda ke ba da shawarar cewa tauraron jerin G ne na ƙarshen. Koyaya, a zahiri ƙarami ne, tauraron da ke gudana daga hydrogen a cikin ainihinsa kuma yana fadada girmansa. "Fe-3.1CH-1.5" ya nuna rashin yawa na methylidyne radical da baƙin ƙarfe. Tauraron yana da yawan abubuwa masu yawa, wato, abubuwa masu nauyi fiye da carbon da aka samar ta hanyar halayen nukiliya da suka shafi helium. Alamun ƙarfe suna rarraba shi a matsayin tauraron Population II .
Nu Indi ta kasance abin nazari a fannin asteroseismology saboda tana nuna solar-like oscillations (rawar jiki irin ta Rana). Ita ce tauraro na farko mai ƙarancin ƙarfe (metal-poor star) da aka yi amfani da asteroseismology a kansa. Ta hanyar wannan hanya, an auna nauyinta da shekarunta inda aka samu nauyinta kusan 0.85 na nauyin Rana, sannan shekarunta kusan biliyan 11.
A matsayinta na subgiant, ta faɗaɗa girma kuma ta ƙara haske. A halin yanzu, radius ɗinta ya kai kusan sau uku na na Rana, kuma hasken da take fitarwa (luminosity) ya kai sau 6.3 na na Rana. Zafin jikinta (effective temperature) ya kai 5,318 K, wanda ke ba ta launin rawaya irin na taurarin G-type.
Yana da ɗan asalin galactic halo wanda a halin yanzu ke ƙetare galactic disk. Tsarin orbital yana da ɗan girma, a 0.60. Ya kai mafi ƙarancin nisa shekaru-haske 8,000 daga Cibiyar Galactic, kuma nisansa da ke da alaƙa da jirgin galactic bai wuce 4,900 ly ba. Ba ta cikin wani ɓangare na ƙungiyar taurari ko ƙungiyar motsi.
Nu Indi an taɓa tunanin tauraruwa ce ta binary wacce abubuwan da ke ciki suna da nau'ikan nau'ikan A3V da F9V, amma wannan da'awar tun lokacin an karyata ta. Koyaya, akwai shaidar cewa yana iya zama binary na astrometric.
Bayanan da aka ambata
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