SDSS DR12中新白矮星的搜寻
发布时间：2018-08-08 12:36
【摘要】：在斯隆数字巡天(SDSS)的第十二次数据释放(DR12)中,我们找到一些新的白矮星。而且利用神经网络的方法来发展了一套新的颜色选择判据来寻找SDSS中的白矮星。我们找到的新白矮星包括1899颗DA白矮星,40颗DB白矮星,22颗DQ白矮星,190颗DZ白矮星,10颗磁白矮星和133颗白矮-主序双星。分析了氢大气白矮星(DA)与氦大气白矮星(DB)的SDSS观测光谱,得到了它们的有效温度和表面重力加速度。利用DA白矮星和DB白矮星的冷却模型计算了它们的冷却年龄和质量。我们也对白矮-主序双星进行了光谱分析,得到了其恒星参数。同时,我们通过自行找到了26颗高速白矮星候选体(V⊥≥100km s-1)。这对银河系的动力学演化将是有用的。
[Abstract]:In the twelfth data release (DR12) of the Sloan Digital Sky Survey (SDSS), we found some new white dwarfs. Furthermore, a new color selection criterion is developed to find white dwarfs in SDSS using neural network method. We found new white dwarfs, including 1899 DA white dwarfs, 40 DB white dwarfs, 22 DQ white dwarfs, 190 DZ white dwarfs, 10 magnetic white dwarfs and 133 white dwarf and principal binary stars. The SDSS spectra of hydrogen white dwarf (DA) and helium white dwarf (DB) are analyzed and their effective temperature and surface gravity acceleration are obtained. The cooling age and mass of DA white dwarf and DB white dwarf are calculated by using the cooling model. The star parameters of white dwarf-principal-order binary stars are also obtained by spectral analysis. At the same time, we have identified 26 high speed white dwarfs (V Karabakh 鈮，
本文编号：2171805
[Abstract]:In the twelfth data release (DR12) of the Sloan Digital Sky Survey (SDSS), we found some new white dwarfs. Furthermore, a new color selection criterion is developed to find white dwarfs in SDSS using neural network method. We found new white dwarfs, including 1899 DA white dwarfs, 40 DB white dwarfs, 22 DQ white dwarfs, 190 DZ white dwarfs, 10 magnetic white dwarfs and 133 white dwarf and principal binary stars. The SDSS spectra of hydrogen white dwarf (DA) and helium white dwarf (DB) are analyzed and their effective temperature and surface gravity acceleration are obtained. The cooling age and mass of DA white dwarf and DB white dwarf are calculated by using the cooling model. The star parameters of white dwarf-principal-order binary stars are also obtained by spectral analysis. At the same time, we have identified 26 high speed white dwarfs (V Karabakh 鈮，
本文编号：2171805
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