A young white dwarf with an infrared excess

S. Xu; M. Jura; B. Pantoja; B. Klein; B. Zuckerman; K. Y.L. Su; H. Y.A. Meng

doi:10.1088/2041-8205/806/1/L5

A young white dwarf with an infrared excess

S. Xu, M. Jura, B. Pantoja, B. Klein, B. Zuckerman, K. Y.L. Su, H. Y.A. Meng

Steward Observatory

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18 Scopus citations

Abstract

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.

Original language	English (US)
Article number	L5
Journal	Astrophysical Journal Letters
Volume	806
Issue number	1
DOIs	https://doi.org/10.1088/2041-8205/806/1/L5
State	Published - Jun 10 2015

Keywords

circumstellar matter
minor planets asteroids: general
white dwarfs

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1088/2041-8205/806/1/L5

Cite this

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title = "A young white dwarf with an infrared excess",

abstract = "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.",

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T1 - A young white dwarf with an infrared excess

AU - Xu, S.

AU - Jura, M.

AU - Pantoja, B.

AU - Klein, B.

AU - Zuckerman, B.

AU - Su, K. Y.L.

AU - Meng, H. Y.A.

PY - 2015/6/10

Y1 - 2015/6/10

N2 - 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.

AB - 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.

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KW - minor planets asteroids: general

KW - white dwarfs

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A young white dwarf with an infrared excess

Abstract

Keywords

ASJC Scopus subject areas

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