论文标题
超过78 000 RR Lyrae星星在银河凸起和Ogle调查中的磁盘中
Over 78 000 RR Lyrae Stars in the Galactic Bulge and Disk from the OGLE Survey
论文作者
论文摘要
我们介绍了银河凸起和磁盘中RR Lyrae星的Ogle系列的升级。我们的样品的大小增加了一倍，达到了78 350 RR lyr变量，其中56 508是基本模式脉动脉冲（RRAB星），21 321脉冲仅在首先重叠（RRC星）（RRC星）中，458个是经典的双模式脉冲脉冲（RRD星星（RRD星星），以及63是Anomal rrd rrd rrd rrd rrd rrd rrd rrd rrd rrd rrd。对于所有新确定的RR Lyr Stars，我们发布了在OGLE GALAXY变异性调查中获得的时间序列光度法。 我们介绍了天空上RR Lyr恒星的空间分布，提供了托管RR Lyr变量的球形簇的列表，并讨论了多模脉动器的Petersen图。我们发现彼得森图中属于紧凑型组的新RRD恒星（具有周期比p_1o/p_f = 0.74和基本模式周期p_f = 0.44 d），我们证明它们的空间分布在银河系中心周围大致在球面上是对称的。
We present an upgrade of the OGLE Collection of RR Lyrae stars in the Galactic bulge and disk. The size of our sample has been doubled and reached 78 350 RR Lyr variables, of which 56 508 are fundamental-mode pulsators (RRab stars), 21 321 pulsate solely in the first-overtone (RRc stars), 458 are classical double-mode pulsators (RRd stars), and 63 are anomalous RRd variables (including five triple-mode pulsators). For all the newly identified RR Lyr stars, we publish time-series photometry obtained during the OGLE Galaxy Variability Survey. We present the spatial distribution of RR Lyr stars on the sky, provide a list of globular clusters hosting RR Lyr variables, and discuss the Petersen diagram for multimode pulsators. We find new RRd stars belonging to a compact group in the Petersen diagram (with period ratios P_1O/P_F = 0.74 and fundamental-mode periods P_F = 0.44 d) and we show that their spatial distribution is roughly spherically symmetrical around the Milky Way center.
