Dab tsi ntawm cov hnub qub nyob hauv HR daim duab?
Dab tsi ntawm cov hnub qub nyob hauv HR daim duab?

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Video: Dab tsi ntawm cov hnub qub nyob hauv HR daim duab?
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Anonim

Muaj 3 lub ntsiab cheeb tsam (los yog evolutionary theem) ntawm lub HR daim duab : Lub ntsiab ntu ntu ntawm sab laug sab saud (kub, luminous hnub qub ) mus rau hauv qab txoj cai (txias, faint hnub qub ) dominates lub HR daim duab . liab giant thiab supergiant hnub qub (luminosity chav kawm Kuv mus txog III) nyob hauv cheeb tsam saum toj no lub ntsiab sib lawv liag.

Raws li txoj cai, muaj pes tsawg hom hnub qub tau pom ntawm daim duab HR?

Cov Daim duab H-R cov phiaj xwm hnub qub xws li muaj plaub pawg loj.

Ib yam li ntawd, hom hnub qub twg yog lub hnub ntawm HR daim duab? Nyob rau hauv qis-sab laug yog qhov twg dawb dwarfs pom, thiab saum toj no lub ntsiab sib lawv liag yog cov subgiants, giants thiab supergiants. Cov Hnub yog pom nyob rau ntawm lub ntsiab sib lawv liag ntawm luminosity 1 (qhov magnitude 4.8) thiab B-V xim Performance index 0.66 (kub 5780 K, spectral hom G2V).

Ib tug kuj yuav nug, dab tsi yog feem ntau ntawm cov hnub qub ntawm HR daim duab faib ua?

Ib zajlus ntawm qhov ze tshaj plaws hnub qub ntawm HR daim duab yog qhia hauv qab no: Feem ntau hnub qub nyob rau hauv lub hnub ci zej zog yog fainter thiab txias dua lub hnub. Tseem muaj ib tug puv tes hnub qub uas yog liab thiab ci heev (hu ua liab supergiants) thiab ob peb hnub qub uas kub, tab sis heev faus (hu ua dawb dwarfs).

Dab tsi yog 7 hom hnub qub?

Lub hnub qub Classification Muaj xya lub ntsiab hom hnub qub . Txhawm rau txo qhov kub thiab txias, O, B, A, F, G, K, thiab M. O thiab B hnub qub tsis tshua muaj tab sis ci heev; M hnub qub yog common tab sis dim..

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