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A SUBTLE INFRARED EXCESS ASSOCIATED WITH A YOUNG WHITE DWARF IN THE EDINBURGH-CAPE BLUE OBJECT SURVEY
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| Zeitschriftentitel: | The Astrophysical Journal |
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| Personen und Körperschaften: | , , , , , |
| In: | The Astrophysical Journal, 831, 2016, 1, S. 31 |
| Format: | E-Article |
| Sprache: | Unbestimmt |
| veröffentlicht: |
American Astronomical Society
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| author_facet |
Dennihy, E. Debes, John H. Dunlap, B. H. Dufour, P. Teske, Johanna K. Clemens, J. C. Dennihy, E. Debes, John H. Dunlap, B. H. Dufour, P. Teske, Johanna K. Clemens, J. C. |
|---|---|
| author |
Dennihy, E. Debes, John H. Dunlap, B. H. Dufour, P. Teske, Johanna K. Clemens, J. C. |
| spellingShingle |
Dennihy, E. Debes, John H. Dunlap, B. H. Dufour, P. Teske, Johanna K. Clemens, J. C. The Astrophysical Journal A SUBTLE INFRARED EXCESS ASSOCIATED WITH A YOUNG WHITE DWARF IN THE EDINBURGH-CAPE BLUE OBJECT SURVEY Space and Planetary Science Astronomy and Astrophysics |
| author_sort |
dennihy, e. |
| spelling |
Dennihy, E. Debes, John H. Dunlap, B. H. Dufour, P. Teske, Johanna K. Clemens, J. C. 0004-637X 1538-4357 American Astronomical Society Space and Planetary Science Astronomy and Astrophysics http://dx.doi.org/10.3847/0004-637x/831/1/31 <jats:title>ABSTRACT</jats:title> <jats:p>We report the discovery of a subtle infrared excess associated with the young white dwarf EC 05365–4749 at 3.35 and 4.6 <jats:italic>μ</jats:italic>m. Follow-up spectroscopic observations are consistent with a hydrogen atmosphere white dwarf of effective temperature 22,800 K and log [<jats:italic>g</jats:italic> (cm s<jats:sup>−2</jats:sup>)] = 8.19. High-resolution spectroscopy reveals atmospheric metal pollution with logarithmic abundances of [Mg/H] = −5.36 and [Ca/H] = −5.75, confirming the white dwarf is actively accreting from a metal-rich source with an intriguing abundance pattern. We find that the infrared excess is well modeled by a flat, opaque debris disk, though disk parameters are not well constrained by the small number of infrared excess points. We further demonstrate that relaxing the assumption of a circular dusty debris disk to include elliptical disks expands the widths of acceptable disks, adding an alternative interpretation to the subtle infrared excesses commonly observed around young white dwarfs.</jats:p> A SUBTLE INFRARED EXCESS ASSOCIATED WITH A YOUNG WHITE DWARF IN THE EDINBURGH-CAPE BLUE OBJECT SURVEY The Astrophysical Journal |
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American Astronomical Society, 2016 |
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American Astronomical Society, 2016 |
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American Astronomical Society |
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The Astrophysical Journal |
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| title |
A SUBTLE INFRARED EXCESS ASSOCIATED WITH A YOUNG WHITE DWARF IN THE EDINBURGH-CAPE BLUE OBJECT SURVEY |
| title_unstemmed |
A SUBTLE INFRARED EXCESS ASSOCIATED WITH A YOUNG WHITE DWARF IN THE EDINBURGH-CAPE BLUE OBJECT SURVEY |
| title_full |
A SUBTLE INFRARED EXCESS ASSOCIATED WITH A YOUNG WHITE DWARF IN THE EDINBURGH-CAPE BLUE OBJECT SURVEY |
| title_fullStr |
A SUBTLE INFRARED EXCESS ASSOCIATED WITH A YOUNG WHITE DWARF IN THE EDINBURGH-CAPE BLUE OBJECT SURVEY |
| title_full_unstemmed |
A SUBTLE INFRARED EXCESS ASSOCIATED WITH A YOUNG WHITE DWARF IN THE EDINBURGH-CAPE BLUE OBJECT SURVEY |
| title_short |
A SUBTLE INFRARED EXCESS ASSOCIATED WITH A YOUNG WHITE DWARF IN THE EDINBURGH-CAPE BLUE OBJECT SURVEY |
| title_sort |
a subtle infrared excess associated with a young white dwarf in the edinburgh-cape blue object survey |
| topic |
Space and Planetary Science Astronomy and Astrophysics |
| url |
http://dx.doi.org/10.3847/0004-637x/831/1/31 |
| publishDate |
2016 |
| physical |
31 |
| description |
<jats:title>ABSTRACT</jats:title>
<jats:p>We report the discovery of a subtle infrared excess associated with the young white dwarf EC 05365–4749 at 3.35 and 4.6 <jats:italic>μ</jats:italic>m. Follow-up spectroscopic observations are consistent with a hydrogen atmosphere white dwarf of effective temperature 22,800 K and log [<jats:italic>g</jats:italic> (cm s<jats:sup>−2</jats:sup>)] = 8.19. High-resolution spectroscopy reveals atmospheric metal pollution with logarithmic abundances of [Mg/H] = −5.36 and [Ca/H] = −5.75, confirming the white dwarf is actively accreting from a metal-rich source with an intriguing abundance pattern. We find that the infrared excess is well modeled by a flat, opaque debris disk, though disk parameters are not well constrained by the small number of infrared excess points. We further demonstrate that relaxing the assumption of a circular dusty debris disk to include elliptical disks expands the widths of acceptable disks, adding an alternative interpretation to the subtle infrared excesses commonly observed around young white dwarfs.</jats:p> |
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| author | Dennihy, E., Debes, John H., Dunlap, B. H., Dufour, P., Teske, Johanna K., Clemens, J. C. |
| author_facet | Dennihy, E., Debes, John H., Dunlap, B. H., Dufour, P., Teske, Johanna K., Clemens, J. C., Dennihy, E., Debes, John H., Dunlap, B. H., Dufour, P., Teske, Johanna K., Clemens, J. C. |
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| description | <jats:title>ABSTRACT</jats:title> <jats:p>We report the discovery of a subtle infrared excess associated with the young white dwarf EC 05365–4749 at 3.35 and 4.6 <jats:italic>μ</jats:italic>m. Follow-up spectroscopic observations are consistent with a hydrogen atmosphere white dwarf of effective temperature 22,800 K and log [<jats:italic>g</jats:italic> (cm s<jats:sup>−2</jats:sup>)] = 8.19. High-resolution spectroscopy reveals atmospheric metal pollution with logarithmic abundances of [Mg/H] = −5.36 and [Ca/H] = −5.75, confirming the white dwarf is actively accreting from a metal-rich source with an intriguing abundance pattern. We find that the infrared excess is well modeled by a flat, opaque debris disk, though disk parameters are not well constrained by the small number of infrared excess points. We further demonstrate that relaxing the assumption of a circular dusty debris disk to include elliptical disks expands the widths of acceptable disks, adding an alternative interpretation to the subtle infrared excesses commonly observed around young white dwarfs.</jats:p> |
| doi_str_mv | 10.3847/0004-637x/831/1/31 |
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| imprint_str_mv | American Astronomical Society, 2016 |
| institution | DE-Bn3, DE-Brt1, DE-Zwi2, DE-D161, DE-Gla1, DE-Zi4, DE-15, DE-Pl11, DE-Rs1, DE-105, DE-14, DE-Ch1, DE-L229, DE-D275 |
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| physical | 31 |
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| spelling | Dennihy, E. Debes, John H. Dunlap, B. H. Dufour, P. Teske, Johanna K. Clemens, J. C. 0004-637X 1538-4357 American Astronomical Society Space and Planetary Science Astronomy and Astrophysics http://dx.doi.org/10.3847/0004-637x/831/1/31 <jats:title>ABSTRACT</jats:title> <jats:p>We report the discovery of a subtle infrared excess associated with the young white dwarf EC 05365–4749 at 3.35 and 4.6 <jats:italic>μ</jats:italic>m. Follow-up spectroscopic observations are consistent with a hydrogen atmosphere white dwarf of effective temperature 22,800 K and log [<jats:italic>g</jats:italic> (cm s<jats:sup>−2</jats:sup>)] = 8.19. High-resolution spectroscopy reveals atmospheric metal pollution with logarithmic abundances of [Mg/H] = −5.36 and [Ca/H] = −5.75, confirming the white dwarf is actively accreting from a metal-rich source with an intriguing abundance pattern. We find that the infrared excess is well modeled by a flat, opaque debris disk, though disk parameters are not well constrained by the small number of infrared excess points. We further demonstrate that relaxing the assumption of a circular dusty debris disk to include elliptical disks expands the widths of acceptable disks, adding an alternative interpretation to the subtle infrared excesses commonly observed around young white dwarfs.</jats:p> A SUBTLE INFRARED EXCESS ASSOCIATED WITH A YOUNG WHITE DWARF IN THE EDINBURGH-CAPE BLUE OBJECT SURVEY The Astrophysical Journal |
| spellingShingle | Dennihy, E., Debes, John H., Dunlap, B. H., Dufour, P., Teske, Johanna K., Clemens, J. C., The Astrophysical Journal, A SUBTLE INFRARED EXCESS ASSOCIATED WITH A YOUNG WHITE DWARF IN THE EDINBURGH-CAPE BLUE OBJECT SURVEY, Space and Planetary Science, Astronomy and Astrophysics |
| title | A SUBTLE INFRARED EXCESS ASSOCIATED WITH A YOUNG WHITE DWARF IN THE EDINBURGH-CAPE BLUE OBJECT SURVEY |
| title_full | A SUBTLE INFRARED EXCESS ASSOCIATED WITH A YOUNG WHITE DWARF IN THE EDINBURGH-CAPE BLUE OBJECT SURVEY |
| title_fullStr | A SUBTLE INFRARED EXCESS ASSOCIATED WITH A YOUNG WHITE DWARF IN THE EDINBURGH-CAPE BLUE OBJECT SURVEY |
| title_full_unstemmed | A SUBTLE INFRARED EXCESS ASSOCIATED WITH A YOUNG WHITE DWARF IN THE EDINBURGH-CAPE BLUE OBJECT SURVEY |
| title_short | A SUBTLE INFRARED EXCESS ASSOCIATED WITH A YOUNG WHITE DWARF IN THE EDINBURGH-CAPE BLUE OBJECT SURVEY |
| title_sort | a subtle infrared excess associated with a young white dwarf in the edinburgh-cape blue object survey |
| title_unstemmed | A SUBTLE INFRARED EXCESS ASSOCIATED WITH A YOUNG WHITE DWARF IN THE EDINBURGH-CAPE BLUE OBJECT SURVEY |
| topic | Space and Planetary Science, Astronomy and Astrophysics |
| url | http://dx.doi.org/10.3847/0004-637x/831/1/31 |