發(fā)布時(shí)間：2018-04-01 11:38

  本文選題：過(guò)相接雙星　切入點(diǎn)：最小質(zhì)量比　出處：《科學(xué)通報(bào)》2010年34期

【摘要】：基于30顆小質(zhì)量比深度相接雙星的觀測(cè)數(shù)據(jù),獲得一些重要的統(tǒng)計(jì)結(jié)論:(ⅰ)質(zhì)光關(guān)系和質(zhì)徑關(guān)系指出,此類(lèi)雙星可能由于演化和膨脹而使光度下降、半徑變大,預(yù)示它們可能處在演化的最后階段.(ⅱ)Mtotal-Jtotal關(guān)系表明,隨著總質(zhì)量的減小,總的比角動(dòng)量也相應(yīng)減小.因此,此類(lèi)雙星系統(tǒng)從深度相接到并合的過(guò)程中,不斷損失質(zhì)量和角動(dòng)量.(ⅲ)由q-f關(guān)系和q-Jspin/Jorb關(guān)系,確定出過(guò)相接雙星的最小質(zhì)量比可能在0.0439~0.0465.這對(duì)雙星演化并合理論提出了重要的挑戰(zhàn).目前觀測(cè)到的最小質(zhì)量比雙星V857Her通過(guò)次子星到主子星的守恒質(zhì)量轉(zhuǎn)移的并合時(shí)標(biāo)約為1.07Ga.
[Abstract]:30 tiny mass ratio depth observation data based on binary phase, obtained some important statistical conclusions: (I) pointed out that the mass luminosity relation and mass radius relations, such binaries can make luminosity decline due to evolution and expansion, the radius becomes larger, indicating that they may be in the final stages of evolution. (II) Mtotal-Jtotal show that the relationship between the with the decrease of the total mass of the total angular momentum decreases correspondingly. Therefore, this kind of binary system connected to and from the depth in the process of continuous loss of mass and angular momentum. (III) by q-f and q-Jspin/Jorb relations, determined overcontact binary minimum quality than possible in the binary evolution and 0.0439~0.0465. the theory put forward an important challenge. The minimum quality currently observed than binary V857Her through the second star to the primary star of conservation of mass transfer and time scale of about 1.07Ga.

【作者單位】： 淮北師范大學(xué)物理與電子信息學(xué)院;
【基金】：國(guó)家自然科學(xué)基金天文聯(lián)合基金資助項(xiàng)目(10778707)
【分類(lèi)號(hào)】：P153

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