MUCHFUSS -来自SDSS的热暗暗星的大量看不见的伴星
MUCHFUSS - Massive Unseen Companions to Hot Faint Underluminous Stars from SDSS
摘要：
来自SDSS（MUCHFUSS）的炽热昏暗暗星的大量看不见的伴星项目旨在寻找具有大量紧凑伴星（质量为$M>1.0 {\rm M_{\odot}}$的白矮星、中子星或黑洞）的炽热亚矮星。通过双星演化计算预测了这类系统的存在，并发现了一些候选系统。我们从Sloan数字巡天（SDSS）中识别出了$\simeq1100$热亚矮星。对高速恒星进行了重新观测，并对个别SDSS光谱进行了分析。大约有70颗径向速度可变的次矮星被选为后续时间分辨光谱学的良好候选者，以获得轨道参数和光度跟踪，以寻找光变曲线中的日食等特征。到目前为止，我们发现了9个轨道周期从$\simeq0.07 {\rm d}$到$1.5 {\rm d}$的短轨道双星。其中两个是食双星，其伴星很可能是亚恒星性质的。
英文摘要：
The project Massive Unseen Companions to Hot Faint Underluminous Stars from SDSS (MUCHFUSS) aims at finding hot subdwarf stars with massive compact companions (white dwarfs with masses $M>1.0 {\rm M_{\odot}}$, neutron stars or black holes). The existence of such systems is predicted by binary evolution calculations and some candidate systems have been found. We identified $\simeq1100$ hot subdwarf stars from the Sloan Digital Sky Survey (SDSS). Stars with high velocities have been reobserved and individual SDSS spectra have been analysed. About 70 radial velocity variable subdwarfs have been selected as good candidates for follow-up time resolved spectroscopy to derive orbital parameters and photometric follow-up to search for features like eclipses in the light curves. Up to now we found nine close binary sdBs with short orbital periods ranging from $\simeq0.07 {\rm d}$ to $1.5 {\rm d}$. Two of them are eclipsing binaries with companions that are most likely of substellar nature.
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