标题： 鲁宾数据预览1中的外盘SX Phe变星 显示英文标题

标题： An outer-disk SX Phe variable star in Rubin Data Preview 1

摘要： 我们通过维拉·C·鲁宾天文台的数据预览1的217个时序测光数据，报告发现了一颗SX猎户座型脉动变星。 这颗恒星被指定为LSST-DP1-O- 614435753623041404（或简称为LSST-C25_var1），其平均星等为$(\langle g\rangle, \langle r\rangle) = (18.65, 18.63)$，在这些波段中的脉动振幅为（0.60，0.38）~mag。 它的周期为0.0767天（1.841小时），这与SX Phe脉动变星的典型周期一致。 我们基于SX Phe周期-光度关系推导出这颗恒星的距离为16.6 kpc。 它的位置距离银河平面$\sim5$kpc，在银河系外盘区域，距银心距离为$\sim22$kpc，其自行表明LSST-C25_var1是单子座环结构的一部分。 这颗恒星作为鲁宾/LSST数据中数千颗变星的一个小样本呈现出来。 显示英文摘要

摘要： We report the discovery of an SX Phoenicis-type pulsating variable star via 217 epochs of time-series photometry from the Vera C. Rubin Observatory's Data Preview 1. The star, designated LSST-DP1-O- 614435753623041404 (or LSST-C25_var1 for short), has mean magnitudes of $(\langle g\rangle, \langle r\rangle) = (18.65, 18.63)$, with pulsation amplitudes of (0.60, 0.38)~mag in these bands. Its period is 0.0767 days (1.841 hours), typical of SX Phe pulsators. We derive a distance to the star of 16.6 kpc based on an SX Phe period-luminosity relation. Its position $\sim5$ kpc from the Galactic plane, in the outer Milky Way disk at a Galactocentric distance of $\sim22$ kpc, and its proper motion suggest that LSST-C25_var1 is part of the Monoceros Ring structure. This star is presented as a small taste of the many thousands of variable stars expected in Rubin/LSST data.