SDSS J160043.6+074802.9：一种非常快速的sdO脉冲星
天体物理学
2009-11-11 v1
摘要
我们报告了Sloan Digital Sky Survey星体SDSS J160043.6+074802.9为非常快速脉冲星这一偶然发现。这种变化以约8380微Hz(周期=119.33秒)的频率为主，幅度较大(0.04 mag)，其第一谐波为16760微Hz(59.66秒; 0.005 mag)。在这些频率之间，我们发现至少另有8种变化，周期在62至118秒之间，振幅约为0.007至0.003 mag；也可能存在较弱的振荡。来自南非大型望远镜(Southern African Large Telescope)性能验证阶段的初步光谱图表 indicate SDSS J160043.6+074802.9为由sdO星和一颗后期类型主序星组成的光谱双星。这使其成为首个明确检测到此类sdO星可脉冲的天体，显然也是首个发现具有多频率变化的sdO星。
引用
@article{arxiv.astro-ph/0607171,
title = {SDSS J160043.6+074802.9: a very rapid sdO pulsator},
author = {P. A. Woudt and D. Kilkenny and E. Zietsman and B. Warner and N. S. Loaring and C. Copley and A. Kniazev and P. Vaisanen and M. Still and R. S. Stobie and E. B. Burgh and K. H. Nordsieck and J. W. Percival and D. O'Donoghue and D. A. H. Buckley},
journal= {arXiv preprint arXiv:astro-ph/0607171},
year = {2009}
}
备注
7 pages, 6 figures (figure 4 at reduced resolution, original available on request). Accepted for publication in MNRAS