本文選題：銀心　切入點(diǎn)：脈沖星-黑洞雙星　出處：《中國(guó)科學(xué):物理學(xué) 力學(xué) 天文學(xué)》2015年02期 　論文類(lèi)型：期刊論文

【摘要】：脈沖星是宇宙中最精確的時(shí)鐘,其信號(hào)周期的精確度能夠超過(guò)原子鐘;它發(fā)出的脈沖在到達(dá)地球的過(guò)程中,如果途徑黑洞附近,會(huì)被強(qiáng)引力場(chǎng)彎曲,原則上可以通過(guò)觀測(cè)接收到的脈沖來(lái)研究黑洞和強(qiáng)引力場(chǎng)的性質(zhì).我們以圍繞銀河系中心超大質(zhì)量黑洞做圓周運(yùn)動(dòng)的脈沖星為研究對(duì)象,分析了強(qiáng)引力場(chǎng)對(duì)脈沖路徑的影響和脈沖到達(dá)時(shí)間的延遲.結(jié)果表明,脈沖軌跡和時(shí)延敏感依賴(lài)于觀測(cè)者的觀測(cè)傾角.觀測(cè)角越大,強(qiáng)引力場(chǎng)效應(yīng)就越顯著.相比于黑洞的引力質(zhì)量,黑洞自旋對(duì)結(jié)果的影響較小;當(dāng)觀測(cè)者偏離脈沖星軌道平面較大,即觀測(cè)角較小時(shí),黑洞的自旋效應(yīng)明顯變小;因此,需要借助高精度和靈敏度的望遠(yuǎn)鏡來(lái)探究黑洞自旋的影響.
[Abstract]:Pulsars are the most accurate clocks in the universe, and their signal cycles can be more accurate than atomic clocks; the pulses it emits as it reaches Earth, if it passes near a black hole, is bent by a strong gravitational field. In principle, the properties of black holes and strong gravitational fields can be studied by observing the received pulses. We study pulsars that circle around supermassive black holes in the center of the Milky way. The influence of strong gravitational field on the pulse path and the delay of the pulse arrival time are analyzed. The results show that the sensitivity of the pulse trajectory and the time delay depends on the observational inclination angle of the observer, and the larger the observation angle is, The stronger the gravitational field effect is, the less the effect of black hole spin is on the result compared with the gravitational mass of the black hole, and when the observer deviates from the plane of the pulsar orbit, that is, the smaller the observation angle, the smaller the spin effect of the black hole is. High precision and sensitivity telescopes are needed to explore the effects of black hole spin.
【作者單位】： 中國(guó)科學(xué)技術(shù)大學(xué)天文學(xué)系;中國(guó)科學(xué)院星系與宇宙學(xué)重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(編號(hào):2012CB821801) 中國(guó)科學(xué)院戰(zhàn)略性先導(dǎo)科技專(zhuān)項(xiàng)(B類(lèi))(編號(hào):XDB09000000)資助項(xiàng)目
【分類(lèi)號(hào)】：P145.6;P145.8

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本文編號(hào)：1596143