Hot Cores in the submm - obscured by dust?

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dc.creatorRolffs, Rainer
dc.creatorSchilke, Peter
dc.creatorComito, Claudia
dc.creatorHieret, Carolin
dc.creatorWyrowski, Friedrich
dc.date2007-11-14
dc.date.accessioned2026-07-07T08:42:54Z
dc.date.available2026-07-07T08:42:54Z
dc.descriptionWe present APEX observations of HCN (9-8) and (4-3) lines toward a sample of hot cores. The spectral shapes of the main transitions are asymmetric and self-absorbed, as expected for high optical depth in a possibly infalling envelope. For spherical symmetry, the large column densities of these sources would mean that the central region is obscured by dust above a certain frequency. However, we detected the vibrationally excited satellite lines (v_2=1; J=9-8) at 797 GHz, which originate from the inner regions. This indicates that high-frequency ALMA observations of hot core centers will be feasible.
dc.description4 pages, 3 figures, to appear in "Science with ALMA: a new era for Astrophysics" Conference Proceedings (to be published by Springer "Astrophysics and Space Science (ApSS)")
dc.identifierhttps://arxiv.org/abs/0711.2154
dc.identifierhttp://arxiv.org/abs/0711.2154
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/142127
dc.subjectAstrophysics
dc.titleHot Cores in the submm - obscured by dust?
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