880 mu n IMAGING OF A TRANSITIONAL DISK IN UPPER SCORPIUS: HOLDOVER FROM THE ERA OF GIANT PLANET FORMATION?
We present 880 mu m images of the transition disk around the star [PZ99] J160421.7-213028, a solar mass star in the nearby Upper Scorpius association. With a resolution down to 0734, we resolve the inner hole in this disk, and via model fitting to the visibilities and spectral energy distribution we...
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| Veröffentlicht in: | The Astrophysical journal 2012-07, Vol.753 (1), p.1-12 |
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| creator | Mathews, Geoffrey S Williams, Jonathan P Menard, Francois |
| description | We present 880 mu m images of the transition disk around the star [PZ99] J160421.7-213028, a solar mass star in the nearby Upper Scorpius association. With a resolution down to 0734, we resolve the inner hole in this disk, and via model fitting to the visibilities and spectral energy distribution we determine both the structure of the outer region and the presence of sparse dust within the cavity. The disk contains ~0.1 M sub(Jup) of millimeter-emitting grains, with an inner disk edge of about 70 AU. The inner cavity contains a small amount of dust with a depleted surface density in a region extending from about 20 to 70 AU. Taking into account prior observations indicating little to no stellar accretion, the lack of a binary companion, and the presence of dust near ~0.1 AU, we determine that the most likely mechanism for the formation of this inner hole is the presence of one or more giant planets. |
| doi_str_mv | 10.1088/0004-637X/753/1/59 |
| format | Article |
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| ispartof | The Astrophysical journal, 2012-07, Vol.753 (1), p.1-12 |
| issn | 0004-637X 1538-4357 |
| language | eng |
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| source | IOP Publishing Free Content; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Alma/SFX Local Collection |
| subjects | Accretion disks Density Dust Formations Holes Planet formation Spectral energy distribution Stars |
| title | 880 mu n IMAGING OF A TRANSITIONAL DISK IN UPPER SCORPIUS: HOLDOVER FROM THE ERA OF GIANT PLANET FORMATION? |
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