本文選題：恒星　切入點(diǎn)：振蕩　出處：《天文學(xué)報(bào)》2013年01期

【摘要】：利用一種非局部和非定常的恒星對(duì)流理論,計(jì)算了0.6～3.0 M_⊙恒星演化模型的線性非絕熱脈動(dòng).結(jié)果表明,赫羅圖上脈動(dòng)不穩(wěn)定帶右方的脈動(dòng)不穩(wěn)定的低溫恒星可以分成2大類(群).一類由主序矮星、亞巨星和中低光度紅巨星組成的類太陽振蕩恒星,它們的中高階(徑向階n_r≥12)p模是脈動(dòng)不穩(wěn)定的,而低階(n_r≤5)模是脈動(dòng)穩(wěn)定的;另一類是由亮的紅巨星和漸近巨星支星(AGB)組成的類長周期變星,它們的低階模(n_r≤5)是脈動(dòng)不穩(wěn)定的,而高階模(n_r≥12)卻是脈動(dòng)穩(wěn)定的.能利用對(duì)流與脈動(dòng)的耦合統(tǒng)一解釋造父變星脈動(dòng)不穩(wěn)定帶紅邊界、類太陽和類長周期變星脈動(dòng).對(duì)赫羅圖右方的低溫恒星的中低階p模振蕩,對(duì)流與脈動(dòng)的耦合是主要的脈動(dòng)激發(fā)和阻尼機(jī)制,而湍流的隨機(jī)激發(fā)機(jī)制僅對(duì)類太陽振蕩高階p模重要.
[Abstract]:Based on a nonlocal and unsteady theory of stellar convection, the linear nonadiabatic pulsation of the 0.6 ~ (3. 0) M _ (-)-298 stellar evolution model is calculated.The results show that the low temperature stars with pulsation instability in the right side of the pulsating instability band on the Hero diagram can be divided into two categories.A class of sun-like oscillating stars consisting of main order dwarf star, subgiant star and low luminosity red giant star is pulsating stable (radial order nr 鈮，

本文編號(hào)：1703575