论文标题
盖亚（Gaia）的候选紧凑型物体二进制文件中揭示了白矮人
White Dwarfs Revealed in Gaia's Candidate Compact Object Binaries
论文作者
论文摘要
黑洞（BHS），中子星（NSS）和白色矮人（WDS）的发现和表征，宽轨道上具有独立的发光伴侣（LCS）令人兴奋，因为它们是深色残余（DR）形成物理学以及二元恒星进化模型的重要测试床。最近，从盖亚（Gaia）的非单一星目录中确定了187个候选人为宽轨道（p_orb/days> 45），托有DRS的独立二进制文件。我们在档案galex数据中确定了49个这些来源的紫外线对应物。为这些来源和出色的演化模型对观察到的光谱能量分布（SED）进行建模，我们限制了这49个来源的LC特性，包括质量，隆重光度和有效温度。使用LC质量以及受GAIA约束的天体质量函数，我们限制了这些来源的DR质量。我们发现9个质量在NS或BH质量范围内清楚。 15个来源表现出显着的NUV过量，其中有4个源在FUV和NUV中显示出多余的。这些过多的紫外线通量的最简单解释是这些来源中的DR是WDS。使用SED模型，我们限制了这15个来源的有效温度和降压光度。我们所有这15个来源的估计DR质量低于WDS的Chandrasekhar质量限制。有趣的是，其中五个来源被错误地识别为文学中的中子恒星。
Discovery and characterisation of black holes (BHs), neutron stars (NSs), and white dwarfs (WDs) with detached luminous companions (LCs) in wide orbits are exciting because they are important test beds for dark remnant (DR) formation physics as well as binary stellar evolution models. Recently, 187 candidates have been identified from Gaia's non-single star catalog as wide orbit (P_orb/days>45), detached binaries hosting DRs. We identify UV counterparts for 49 of these sources in the archival GALEX data. Modeling the observed spectral energy distribution (SED) spanning FUV-NUV to IR for these sources and stellar evolution models, we constrain the LC properties including mass, bolometric luminosity, and effective temperature for these 49 sources. Using the LC masses, and the astrometric mass function constrained by Gaia, we constrain the DR masses for these sources. We find that 9 have masses clearly in the NS or BH mass range. Fifteen sources exhibit significant NUV excess and 4 show excess both in FUV and NUV. The simplest explanation for these excess UV fluxes is that the DRs in these sources are WDs. Using SED modeling we constrain the effective temperature and bolometric luminosity for these 15 sources. Our estimated DR masses for all of these 15 sources are lower than the Chandrasekhar mass limit for WDs. Interestingly, five of these sources had been wrongly identified as neutron stars in literature.
