Access to Astronomical Catalogues

← Click to display the menu
J/ApJ/661/250       Molecular line survey of CRL 618         (Pardo+, 2007)

Molecular line survey of CRL 618 from 80 to 276 GHz and complete model. Pardo J.R., Cernicharo J., Goicoechea J.R., Guelin M., Asensio Ramos A. <Astrophys. J., 661, 250-261 (2007)> =2007ApJ...661..250P
ADC_Keywords: Stars, giant ; Radio lines ; Spectra, millimetric/submm Keywords: circumstellar matter - line: identification - ISM: molecules - radio lines: stars - stars: AGB and post-AGB - stars: carbon - stars: individual (CRL 618) - surveys Abstract: 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 30m telescope in the frequency ranges 80.25-115.75GHz, 131.25-179.25GHz, and 204.25-275.250GHz. 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 3sigma limit is only 1 per ∼2.1GHz (74 features), which is unprecedented in the analysis of this type of large millimeter-wave line surveys. Description: The CRL 618 IRAM 30m line survey was completed in 1994-2002. Objects: -------------------------------------------- RA (2000) DE Designation(s) -------------------------------------------- 04 42 53.6 +36 06 53 CRL 618 = RAFGL 618 -------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tables.dat 82 3164 Identified features in the 80.3-276.0GHz range in the CRL 618 millimeter wave survey (tables 4-6 of the paper)
See also: Byte-by-byte Description of file: tables.dat Byte-by-byte Description of file: tables.dat
Bytes Format Units Label Explanations
1- 11 F11.4 MHz Freq Frequency 13- 41 A29 --- Molecule Molecule identification 43- 82 A40 --- Transition The transition/v-state
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 21-Mar-2009
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service

© UDS/CNRS

Contact