The Abundances Of Polyacetylenes Toward CRL618

dc.contributor.utaustinauthorLacy, John H.en_US
dc.creatorFonfria, J. P.en_US
dc.creatorCernicharo, J.en_US
dc.creatorRichter, Matthew J.en_US
dc.creatorLacy, John H.en_US
dc.date.accessioned2016-04-28T22:22:22Z
dc.date.available2016-04-28T22:22:22Z
dc.date.issued2011-02en
dc.description.abstractWe present a mid-infrared high spectral resolution spectrum of CRL618 in the frequency ranges 778-784 and 1227-1249 cm(-1) (8.01-8.15 and 12.75-12.85 mu m) taken with the Texas Echelon-cross-Echelle Spectrograph (TEXES) and the Infrared Telescope Facility (IRTF). We have identified more than 170 rovibrational lines arising from C2H2, HCN, C4H2, and C6H2. We have found no unmistakable trace of C8H2. The line profiles display a complex structure suggesting the presence of polyacetylenes in several components of the circumstellar envelope (CSE). We derive total column densities of 2.5x10(17), 3.1x10(17), 2.1x10(17), 9.3x10(16) cm(-2), and less than or similar to 5x10(16) cm(-2) for HCN, C2H2, C4H2, C6H2, and C8H2, respectively. The observations indicate that both the rotational and vibrational temperatures in the innermost CSE depend on the molecule, varying from 100 to 350 K for the rotational temperatures and 100 to 500 K for the vibrational temperatures. Our results support a chemistry in the innermost CSE based on radical-neutral reactions triggered by the intense UV radiation field.en_US
dc.description.departmentAstronomyen_US
dc.description.sponsorshipSpanish Ministerio de Educacion y Ciencia ESP2004-665, AYA2003-2785en_US
dc.description.sponsorship"Comunidad de Madrid" government S-0505/ESP-0237en_US
dc.description.sponsorshipEuropean Community MCRTN-CT-2004-51230en_US
dc.description.sponsorshipCSICen_US
dc.description.sponsorshipCONACyT SEP-2004-C01-47090en_US
dc.description.sponsorshipUNAMen_US
dc.description.sponsorshipNSF AST-0708074en_US
dc.identifierdoi:10.15781/T2WR60
dc.identifier.Filename2011_02_crl618.pdfen_US
dc.identifier.citationen_US
dc.identifier.citationFonfria, Jose P., Jose Cernicharo, Matthew J. Richter, and John H. Lacy. "The abundances of polyacetylenes toward CRL618." The Astrophysical Journal, Vol. 728, No. 1 (Feb., 2011): 43.
dc.identifier.doi10.1088/0004-637x/728/1/43en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/2152/35222
dc.language.isoEnglishen_US
dc.relation.ispartofen_US
dc.relation.ispartofserialAstrophysical Journalen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.rights.restrictionOpenen_US
dc.subjectline: identificationen_US
dc.subjectline: profilesen_US
dc.subjectstars: agb and post-agben_US
dc.subjectstars:en_US
dc.subjectcarbonen_US
dc.subjectstars: individual (crl618)en_US
dc.subjectsurveysen_US
dc.subjectprotoplanetary nebula crl-618en_US
dc.subjectresolution infrared-spectrumen_US
dc.subjectvibration-rotation spectrumen_US
dc.subjectyoung planetary-nebulaen_US
dc.subjectevolved starsen_US
dc.subjectreflection nebulaeen_US
dc.subjectoptical-propertiesen_US
dc.subjectmolecular outflowen_US
dc.subjectbanden_US
dc.subjectintensitiesen_US
dc.subjecttriacetyleneen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleThe Abundances Of Polyacetylenes Toward CRL618en_US
dc.typeArticleen_US

Access full-text files

Original bundle

Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
2011_02_crl618.pdf
Size:
585.17 KB
Format:
Adobe Portable Document Format

License bundle

Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.65 KB
Format:
Plain Text
Description: