2008A&A...480..439P


C.D.S. - SIMBAD4 rel 1.7 - 2020.09.30CEST18:16:00

2008A&A...480..439P - Astronomy and Astrophysics, volume 480, 439-443 (2008/3-3)

High-resolution CO observations towards the bright eastern knot of the SNR Puppis A.

PARON S., DUBNER G., REYNOSO E. and RUBIO M.

Abstract (from CDS):

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.We performed high-resolution millimetric observations towards the BEK of Puppis A using the SEST telescope in the 2 J=1-0 and 2-1 lines (beams of 45'' and 23'', respectively). More extended, lower angular resolution 2 J=1-0 observations taken from NANTEN archival data were also analyzed to obtain a complete picture. In the velocity range near 16 km/s, which is 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 for explaining 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.

Abstract Copyright:

Journal keyword(s): ISM: molecules - ISM: clouds - ISM: supernova remnants

Simbad objects: 9

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Number of rows : 9

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 IC 443 SNR 06 18 02.7 +22 39 36           ~ 1108 1
2 NAME GUM Nebula ISM 07 43 -42.1           ~ 388 1
3 PSR J0821-4300 Psr 08 21 58.2 -43 00 22           ~ 114 2
4 NAME Pup A SNR 08 24 07 -42 59.8           ~ 523 1
5 SNR G349.7+00.2 SNR 17 18 10.160 -37 18 53.80           ~ 169 0
6 SNR G034.6-00.5 SNR 18 56 10.650 +01 13 21.30           ~ 831 2
7 SNR G089.0+04.7 SNR 20 45.0 +50 35           ~ 197 0
8 NAME Cyg Loop SNR 20 51.0 +30 40           ~ 826 0
9 SNR G109.1-01.0 SNR 23 01 35 +58 53.0           ~ 316 0

    Equat.    Gal    SGal    Ecl

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2020.09.30-18:16:00

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