标题： 射电连续谱对超紧凑和短轨道周期X射线双星的研究 显示英文标题

标题： Radio Continuum Studies of Ultra-Compact and Short Orbital Period X-Ray Binaries

摘要： 我们展示了神秘的超紧凑X射线双星（UCXBs）的射电连续谱对应体；一个黑洞或中子星从缺乏氢的白矮星供体恒星吸积，轨道周期短（$<$80分钟）。 对于宿主球状星团（GCs）的UCXB样本，我们搜索某些GC特性是否更可能促进UCXB形成。 我们确定，宿主UCXB的GCs在星团浓度、核心半径和半光半径方面属于不同的群体，但在金属丰度和星团质量方面与其他广泛研究的GCs相似。 特别是，宿主UCXB的GCs平均更紧凑，浓度更高，碰撞率显著更高。 我们利用新的和档案观测数据，研究射电光度与轨道周期之间是否存在相关性。 我们确定这两个可观测量之间没有明显的联系。 显示英文摘要

摘要： We present the radio continuum counterparts to the enigmatic ultra-compact X-ray binaries (UCXBs); a black hole or neutron star accreting from a hydrogen-deficient white dwarf donor star, with short orbital periods ($<$ 80 minutes). For the sample of UCXBs hosted by globular clusters (GCs), we search for whether certain GC properties are more likely to enhance UCXB formation. We determine that GCs which host UCXBs are drawn from a distinct population in terms of cluster concentration, core radius and half-light radius, but are similar to other well-studied GCs in metallicity and cluster mass. In particular, UCXB-hosting GCs tend to be on average more compact, with a higher concentration than other GCs, with significantly higher encounter rates. We investigate whether a correlation exists between radio luminosity and orbital period, using new and archival observations. We determine that there is not a clear connection between the two observable quantities.