论文标题
星星什么时候繁荣？
When Do Stars Go BOOM?
论文作者
论文摘要
可以产生白矮人（WD）的恒星的最大质量是重要的天体物理量。建立此限制的最佳方法之一是在年轻的恒星群中搜索WD，在年轻的恒星群中，只有大量恒星才有时间进化，并且可以从WD的冷却时间与群集时代建立祖细胞的质量。到目前为止，以年轻的银河系群集群的搜索尚未产生比大约1.1 $ 〜m _ {\ odot} $更大的WD成员，远低于Chandrasekhar质量$ 1.38〜M _ {\ odot} $，也不是质量的，质量超过了质量超过6〜M _ m _ _ {\ odot} $。但是，寻找逃脱其集群环境的潜在巨大的WD正在产生有趣的候选人。为了进一步扩展群集样品，我们使用HST调查了麦芽素云中的四个年轻和庞大的恒星簇，以使明亮的WDS可以从恒星中演变为10 $ 〜m _ {\ odot} $。我们在所检查的四个群集中最古老的候选者中找到了五个潜在的WD候选者，这是迄今为止发现的第一个外层层次的单个WD。由于这些热WD在光波长下非常微弱，因此最终确认可能必须等待30米的望远镜等待光谱。
The maximum mass of a star that can produce a white dwarf (WD) is an important astrophysical quantity. One of the best approaches to establishing this limit is to search for WDs in young star clusters in which only massive stars have had time to evolve and where the mass of the progenitor can be established from the cooling time of the WD together with the age of the cluster. Searches in young Milky Way clusters have not thus far yielded WD members more massive than about 1.1$~M_{\odot}$, well below the Chandrasekhar mass of $1.38~M_{\odot}$, nor progenitors with masses in excess of about $6~M_{\odot}$. However, the hunt for potentially massive WDs that escaped their cluster environs is yielding interesting candidates. To expand the cluster sample further, we used HST to survey four young and massive star clusters in the Magellanic Clouds for bright WDs that could have evolved from stars as massive as 10$~M_{\odot}$. We located five potential WD candidates in the oldest of the four clusters examined, the first extragalactic single WDs thus far discovered. As these hot WDs are very faint at optical wavelengths, final confirmation will likely have to await spectroscopy with 30-metre class telescopes.
