المستودع الأكاديمي جامعة المدينة

Molecular Line Survey of CRL 618 from 80 to 276 GHz and Complete Model

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dc.creator Pardo Carrión, Juan Ramón
dc.creator Cernicharo, José
dc.creator Goicoechea, Javier R.
dc.creator Guélin, Michel
dc.creator Asensio Ramos, Andrés
dc.date 2008-01-03T16:34:32Z
dc.date 2008-01-03T16:34:32Z
dc.date 2007-05-20
dc.date.accessioned 2017-01-31T00:59:39Z
dc.date.available 2017-01-31T00:59:39Z
dc.identifier The Astrophysical Journal, 661: 250-261 (2007)
dc.identifier 1538-4357
dc.identifier http://hdl.handle.net/10261/2655
dc.identifier 10.1086/513734
dc.identifier.uri http://dspace.mediu.edu.my:8181/xmlui/handle/10261/2655
dc.description We present the complete data set, model, and line identification of a survey of the emission from the C-rich proto–planetary nebula CRL 618 performed with the IRAM 30 m telescope in the frequency ranges 80.25–115.75 GHz, 131.25–179.25 GHz, and 204.25–275.250 GHz. A selection of lines from different species has been used in previous works to derive the structure of the source, its physical conditions, and the chemical abundances in the different gas regions. In this work, we have used this information to run a global simulation of the spectrum in order to check the consistency of the model and to ease the task of line identification. The total number of lines that have a correspondence in both data and model is ~3100, although quite often in this object many lines blend into complex features, so that the model, which takes into account line blending, is a key tool at this stage of the analysis. Of all the lines that we have been able to label, ~55% of them belong to the different forms of HC3N, and ~18% to HC5N. The density of remaining unidentified features above the 3 σ limit is only 1 per ~2.1 GHz (74 features), which is unprecedented in the analysis of this type of large millimeter-wave line surveys.
dc.description [Field completion awaiting access to the full-text paper]
dc.description Peer reviewed
dc.format 24400 bytes
dc.format application/pdf
dc.language eng
dc.publisher American Astronomical Society
dc.publisher University of Chicago Press
dc.rights closedAccess
dc.subject Circumstellar matter
dc.subject Line: identification
dc.subject ISM: molecules
dc.subject Radio lines: stars
dc.subject Stars: AGB and post-AGB
dc.subject Stars: carbon
dc.subject Stars: individual (CRL 618)
dc.subject Surveys
dc.title Molecular Line Survey of CRL 618 from 80 to 276 GHz and Complete Model
dc.type Artículo


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