LIMITS ON UNRESOLVED PLANETARY COMPANIONS TO WHITE DWARF REMNANTS OF 14 INTERMEDIATE-MASS STARS

被引：17

作者：

Kilic, Mukremin ^{[1
]}

Gould, Andrew ^{[2
]}

Koester, Detlev ^{[3
]}

机构：

[1] Smithsonian Astrophys Observ, Cambridge, MA 02138 USA

[2] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA

[3] Univ Kiel, Inst Theoret Phys & Astrophys, D-24098 Kiel, Germany

来源：

ASTROPHYSICAL JOURNAL | 2009年 / 705卷 / 02期

基金：

美国国家科学基金会;

关键词：

infrared: stars; planetary systems; stars:; low-mass; brown dwarfs; white dwarfs; BROWN DWARF; THEORETICAL SPECTRA; EXTRASOLAR PLANETS; STELLAR GRAVEYARD; SPACE-TELESCOPE; COOL CUSTOMERS; GIANT PLANETS; CONSTRAINTS; EXOPLANETS; SEARCH;

D O I：

10.1088/0004-637X/705/2/1219

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present Spitzer IRAC photometry of white dwarf remnants of 14 stars with M = 3-5 M(circle dot). We do not detect mid-infrared excess around any of our targets. By demanding a 3 sigma photometric excess at 4.5 mu m 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. substellar cooling models. Combined with previous IRAC observations of white dwarf remnants of intermediate-mass stars, we rule out >= 10 M(J) companions around 40 white dwarfs and >= 5 M(J) companions around 10 white dwarfs.

引用

页码：1219 / 1225

页数：7

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