AI 中文总结
本研究以锂为指示标，在LAMOST中分辨率巡天中筛选出3个致密天体双星候选体，确认1个为食双星，另2个的大质量伴星可能性较低。
AI 中文摘要
拥有黑洞或中子星伴星的双星系统通常与锂元素增丰相关。近期发现的锂增丰主序星伴星的中子星双星Gaia NS1，证明了锂可作为指示标，在现有光谱巡天中识别致密天体双星。本研究旨在利用锂作为指示标，在大天区面积多目标光纤光谱望远镜（LAMOST）中分辨率巡天（MRS）中寻找类似Gaia NS1的致密天体双星。从LAMOST MRS中，选取了4441颗类似Gaia NS1的贫金属主序星，测量了Li 6707埃的等效宽度，进而识别出33颗具有强锂吸收的恒星样本。利用Gaia的视向速度变化和天体测量双星特征，将样本缩小至3个候选体。确认其中1个候选体为食双星，并通过后续光谱观测证明另外2个候选体存在大质量伴星的可能性较低。
英文摘要
Binary systems with black hole or neutron star companions are often associated with lithium enhancement. Gaia NS1, a recently discovered neutron-star binary with a lithium-enhanced main-sequence companion, demonstrates the potential of lithium as a signpost for identifying compact object binaries in existing spectroscopic surveys. In particular, we aim to use lithium as a signpost to find compact object binaries similar to Gaia NS1 in the Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST) Medium Resolution Survey (MRS). From LAMOST MRS, we selected 4441 metal-poor main-sequence stars like Gaia NS1, measured the Li 6707 Å equivalent width, and then identified a sample of 33 stars with strong Li absorption. We used radial velocity variation and astrometric binarity signatures from Gaia, narrowing the sample to 3 candidates. We identified one of these candidates as an eclipsing binary and demonstrated that massive companions for the other two are unlikely via follow-up spectroscopy.
Comments4 pages, 1 figure, to be published in Research Notes of the AAS
