arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0909.2038astro-ph.SR
收藏

14颗中等质量恒星的白矮星残余的未解析行星伴星的限制

Limits on Unresolved Planetary Companions to White Dwarf Remnants of 14 Intermediate-Mass Stars

Mukremin Kilic, Andrew Gould, Detlev Koester

摘要:

本文报道了14颗M = 3-5 Msol的白矮星遗迹的Spitzer IRAC测光结果。我们没有在目标周围探测到中红外线。通过要求未分辨伴星在4.5微米处的3 σ光度过剩,我们基于Burrows等人(2003)的亚恒星冷却模型,排除了13个目标的行星质量伴星,这些伴星的质量低至5,7或10 M_J。结合IRAC以前对中等质量恒星白矮星遗迹的观测,我们排除了40颗白矮星周围的\geq 10 M_J伴星和10颗白矮星周围的\geq 5 M_J伴星.

英文摘要:

We present Spitzer IRAC photometry of white dwarf remnants of 14 stars with M = 3-5 Msol. We do not detect mid-infrared excess around any of our targets. By demanding a 3 sigma photometric excess at 4.5 micron for unresolved companions, we rule out planetary mass companions down to 5, 7, or 10 M_J for 13 of our targets based on the Burrows et al. (2003) substellar cooling models. Combined with previous IRAC observations of white dwarf remnants of intermediate-mass stars, we rule out \geq 10 M_J companions around 40 white dwarfs and \geq 5 M_J companions around 10 white dwarfs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑