Stalker
Jovian
Number of posts : 540
Age : 33
Location : Paris, France
Registration date : 2008-06-16
 | | Subject: Rejuvenated planet around PG 0010+280? 2nd July 2015, 3:14 am | |
| A Young White Dwarf with an Infrared Excess - Quote :
- Using observations of Spitzer/IRAC, we report the serendipitous discovery of excess infrared emission from a single white dwarf PG 0010+280. At a temperature of 27,220 K and a cooling age of 16 Myr, it is the hottest and youngest white dwarf to display an excess at 3-8 μm. The infrared excess can be fit by either an opaque dust disk within the tidal radius of the white dwarf or a 1300 K blackbody, possibly from an irradiated substellar object or a re-heated giant planet. PG 0010+280 has two unique properties that are different from white dwarfs with a dust disk: (i) relatively low emission at 8 μm and (ii) non-detection of heavy elements in its atmosphere from high-resolution spectroscopic observations with Keck/HIRES. The origin of the infrared excess remains unclear.
http://www.jpl.nasa.gov/news/news.php?feature=4639http://www.centauri-dreams.org/?p=33430 _________________  | |
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