Spitzer Planet Limits around the Pulsating White Dwarf GD66

Autor:	Mullally, Fergal, Reach, William T., Degennaro, Steven, Burrows, Adam
Rok vydání:	2008
Předmět:	Astrophysics
Zdroj:	Astrophys.J.694:327-331,2009
Druh dokumentu:	Working Paper
DOI:	10.1088/0004-637X/694/1/327
Popis:	We present infrared observations in search of a planet around the white dwarf, GD66. Time-series photometry of GD66 shows a variation in the arrival time of stellar pulsations consistent with the presence of a planet with mass > 2.4Mj. Any such planet is too close to the star to be resolved, but the planet's light can be directly detected as an excess flux at 4.5um. We observed GD66 with the two shorter wavelength channels of IRAC on Spitzer but did not find strong evidence of a companion, placing an upper limit of 5--7Mj on the mass of the companion, assuming an age of 1.2--1.7Gyr. Comment: 10 pages, accepted by ApJ
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0812.2951 Zobrazit plný text záznamu View this record from Arxiv