TeV辐射BL Lac候选体的光学光谱研究
Optical Spectroscopy of TeV-emitting BL Lac Candidates
AI总结：
本研究利用SALT和MDM望远镜对16个TeV辐射BL Lac候选体开展光学光谱观测，测得全部样本的光谱红移，含5项新测量，为CTA观测规划及相关研究提供关键红移数据。
AI中文摘要：
TeV辐射的蝎虎座BL型天体（BL Lac）耀变体对喷流现象学、粒子加速及极高能宇宙线产生的研究具有重要意义，还可用于间接研究河外背景光、宇宙磁场及类轴粒子。即将到来的切伦科夫望远镜阵列（CTA）作为地面伽马射线观测台，将扩大观测到的TeV辐射BL Lac天体样本，推动上述领域的研究。然而，可靠的红移对CTA观测的规划与解释至关重要，目前仅约50%的伽马射线BL Lac天体拥有光谱红移。我们利用SALT和MDM望远镜对16个TeV辐射BL Lac候选体开展中分辨率光学光谱观测，测量了全部样本的光谱红移，范围为0.059至0.4，其中包含5项新的光谱红移测量结果。
英文摘要：
TeV-emitting BL Lacertae (BL Lac) blazars have important implications for the study of jet phenomenology, particle acceleration, and ultra high-energy cosmic ray production. They also allow for indirect studies of the extragalactic background light, cosmic magnetic fields, and axion-like particles. The upcoming Cherenkov Telescope Array (CTA), a ground-based gamma-ray observatory, will expand the observed TeV-emitting BL Lac population and enhance the aforementioned fields of study. However, reliable redshifts are crucial for planning and interpreting observations with CTA and only about 50% of gamma-ray BL Lacs have spectroscopic redshifts. We performed medium resolution optical spectroscopy of 16 TeV-emitting BL Lac candidates with the SALT and MDM telescopes. We measured spectroscopic redshifts for the full sample, ranging from 0.059 to 0.4, including 5 new spectroscopic redshift measurements.
