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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 693758.0, MPI für Astronomie / Publikationen_mpia
Probing the radial temperature structure of protoplanetary disks with Herschel/HIFI
Authors:Fedele, D.; Bruderer, S.; van Dishoeck, E. F.; Hogerheijde, M. R.; Panic, O.; Brown, J. M.; Henning, Th.
Language:English
Date of Publication (YYYY-MM-DD):2013
Title of Journal:The Astrophysical Journal Letters
Volume:776
Issue / Number:1
Start Page:id. L3 (5 pp)
Review Status:Internal review
Audience:Experts Only
Abstract / Description:Herschel/HIFI spectroscopic observations of CO J = 10-9, CO J = 16-15 and [C II] toward HD 100546 are presented. The objective is to resolve the velocity profile of the lines to address the emitting region of the transitions and directly probe the distribution of warm gas in the disk. The spectra reveal double-peaked CO line profiles centered on the systemic velocity, consistent with a disk origin. The J = 16-15 line profile is broader than that of the J = 10-9 line, which in turn is broader than those of lower-J transitions (6-5, 3-2, observed with APEX), thus showing a clear temperature gradient of the gas with radius. A power-law flat disk model is used to fit the CO line profiles and the
Free Keywords:protoplanetary disks
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISSN:0004-637X [ID No:1]
URL:http://cdsads.u-strasbg.fr/abs/2013ApJ...776L...3F [ID No:2]
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