本文選題：O-C方法 + δScuti型脈動(dòng)變星��； 參考：《西華師范大學(xué)》2016年碩士論文

【摘要】：對(duì)四顆高振幅的δScuti型脈動(dòng)變星GSC 4464-0924、V524 And、AD CMi、CY Aqr的O-C圖像進(jìn)行了分析。得到GSC 4464-0924的周期是增大的,它的周期變化率dP/dE為123.10 10 days/cycle-?。V524 And的周期是在減小的,它的周期變化率dP/dE為122.45 10--?days/cycle。對(duì)AD CMi和CY Aqr兩顆星進(jìn)行周期分析的時(shí)候發(fā)現(xiàn)它們的O-C的圖形并不是呈現(xiàn)單純的拋物線的形式,因此我們對(duì)這兩顆的周期變化進(jìn)行了進(jìn)一步的分析。首先利用離散的傅里葉變換的方法對(duì)它們的諧頻進(jìn)行分析,然后用Kopal[1]的方法得到可能存在的伴星的軌道參數(shù)。我們得到的結(jié)論是AD CMi可能存在著一顆伴星,而這顆伴星的軌道參數(shù)為:軌道周期P26.36years??,離心率e??0.8542,同時(shí)我們計(jì)算了當(dāng)軌道傾角i?=30?-90?時(shí)伴星的質(zhì)量m??1.0228 M⊙-2.6595 M⊙。而CY Aqr可能不僅僅存在著一顆伴星,很可能存在著兩顆伴星,第一顆伴星的軌道參數(shù)為:軌道周期為P??54.2years,離心率為e??0.49。當(dāng)1i?=30?-90?時(shí)計(jì)算得出伴星的質(zhì)量1m?0.09 M⊙-0.04 M⊙。第二顆伴星的軌道參數(shù)為:軌道周期為P??47.3years,軌道傾角為e??0.69。當(dāng)2i?=30?-90?時(shí)計(jì)算得出伴星的質(zhì)量2m?0.05 M⊙-0.02 M⊙。因此CY Aqr極有可能為一個(gè)三星系統(tǒng)。
[Abstract]:The O-C images of four high amplitude 未 Scuti pulsating variable stars GSC4464-0924 V524 and AD CMiCY Aqr are analyzed. It is obtained that the period of GSC4464-0924 is increased, and the period of DP / dE = 123.10 10 days / r cycle.V524 And is decreased, and the rate of periodic variation dp / dE is 122.45 10-daysr-cycle. In the periodic analysis of AD CMI and CY Aqr stars, it is found that their O-C patterns do not represent a simple parabola, so we further analyze the periodic variations of these two stars. Their harmonic frequencies are analyzed by means of discrete Fourier transform, and then the orbital parameters of possible companion stars are obtained by Kopal [1] method. Our conclusion is that there may be a companion star in AD CMi, and the orbital parameters of the companion star are: orbital period P26.36 years1, eccentricity = 0.8542. The mass of the time companion star is 1.0228M} -2.6595M _ (-) _ _ _. However, CY Aqr probably has not only one companion star, but also two companion stars. The orbital parameters of the first companion star are: the orbit period is 54.2 years, and the centrifugal rate is 0.49. When 1ijiao 30-90? The mass of the companion star 1m?0.09 M is obtained by time calculation. The orbital parameters of the second companion star are as follows: the orbital period is 47.3 years, and the orbit inclination is 0.69. When the 2ijiao 30-90? The mass of the companion star 2m?0.05 M is obtained by time calculation. So CY Aqr is likely to be a Samsung system.
【學(xué)位授予單位】：西華師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：P145.2

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本文編號(hào)：2028042