An improved model of the Edgeworth-Kuiper debris disk
In contrast to all other debris disks, where the dust can be seen via an infrared excess over the stellar photosphere, the dust emission of the Edgeworth-Kuiper belt (EKB) eludes remote detection because of the strong foreground emission of the zodiacal cloud. The authors accessed the expected EKB d...
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Veröffentlicht in: | Astronomy and astrophysics (Berlin) 2012-04, Vol.540, p.1-1 |
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Sprache: | eng |
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Zusammenfassung: | In contrast to all other debris disks, where the dust can be seen via an infrared excess over the stellar photosphere, the dust emission of the Edgeworth-Kuiper belt (EKB) eludes remote detection because of the strong foreground emission of the zodiacal cloud. The authors accessed the expected EKB dust disk properties by modeling. They treated the debiased population of the known trans-Neptunian objects as parent bodies and generated the dust with their collisional code. However, even this still leaves the authors with several models that all correctly reproduce nearly constant dust impact rates in the region of giant planet orbits and do not violate the constraints from the non-detection of the EKB dust thermal emission by the COBE spacecraft. The modeled EKB dust disks, which conform to the observational constraints, can either be transport-dominated or intermediate between the transport-dominated and collision-dominated regime. Therefore, EKB analogs cannot be detected with present-day instruments such as Herschel/PACS. |
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ISSN: | 0004-6361 1432-0746 |