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Authordc.contributor.authorParon, S. 
Authordc.contributor.authorDubner, G. es_CL
Authordc.contributor.authorReynoso, E. es_CL
Authordc.contributor.authorRubio López, Mónica es_CL
Admission datedc.date.accessioned2010-01-12T13:11:00Z
Available datedc.date.available2010-01-12T13:11:00Z
Publication datedc.date.issued2008-03
Cita de ítemdc.identifier.citationASTRONOMY & ASTROPHYSICS, Volume: 480, Issue: 2, Pages: 439-443, 2008en_US
Identifierdc.identifier.issn0004-6361
Identifierdc.identifier.urihttps://repositorio.uchile.cl/handle/2250/125082
Abstractdc.description.abstractAims. This paper reports molecular observations towards the Bright Eastern Knot (BEK) in the SNR Puppis A, a feature where radio and X-ray studies suggest that the shock front is interacting with a dense molecular clump. Methods. We performed high-resolution millimetric observations towards the BEK of Puppis A using the SEST telescope in the 12CO J=1–0 and 2–1 lines (beams of 45′′ and 23′′ respectively). More extended, lower angular resolution 12CO J=1–0 observations taken from NANTEN archival data were also analyzed to obtain a complete picture. Results. In the velocity range near 16 km s−1, the Puppis A systemic velocity, our study revealed two important properties: (i) no dense molecular gas is detected immediately adjacent to the eastern border of the BEK and (ii) the molecular clump detected very close to the radiocontinuum maximum is probably located in the foreground along the line of sight and has not yet been reached by the SNR shock front. We propose two possible scenarios to explain the absence of molecular emission eastwards of the BEK border of Puppis A. Either the shock front has completely engulfed and destroyed a molecular clump or the shock front is interacting with part of a larger cloud and we do not detect CO emission immediately beyond it because the molecules have been dissociated by photodissociation and by reactions with photoionized material due to the radiative precursor.en_US
Patrocinadordc.description.sponsorshipThis work was supported by the CONICET grant 6433/05, UBACYT A055/04 and ANPCYT PICT 04-14018.en_US
Lenguagedc.language.isoenen_US
Publisherdc.publisherEDP SCIENCES S Aen_US
Keywordsdc.subjectISM: moleculesen_US
Títulodc.titleHigh resolution CO observations towards the Bright Eastern Knot of the SNR Puppis Aen_US
Document typedc.typeArtículo de revistaen_US


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