Query : 2015A&A...580A..51P

2015A&A...580A..51P - Astronomy and Astrophysics, volume 580A, 51-51 (2015/8-1)

The southern molecular environment of SNR G18.8+0.3.


Abstract (from CDS):

In a previous paper we investigated the molecular environment toward the eastern border of the supernova remnant (SNR) G18.8+0.3. Continuing with the study of the surroundings of this SNR, we now focus on its southern border, which in the radio continuum emission shows a very peculiar morphology with a corrugated corner and a very flattened southern flank. We observed two regions toward the south of SNR G18.8+0.3 using the Atacama Submillimeter Telescope Experiment (ASTE) in the J=3-2. One of these regions was also surveyed in and C18O J=3-2. The angular and spectral resolution of these observations were 22'' and 0.11km/s. We compared the CO emission to 20cm radio continuum maps obtained as part of the Multi-Array Galactic Plane Imaging Survey (MAGPIS) and 870 µm dust emission extracted from the APEX Telescope Large Area Survey of the Galaxy. We discovered a molecular feature with a good morphological correspondence with the SNR's southernmost corner. In particular, there are indentations in the radio continuum map that are complemented by protrusions in the molecular CO image, strongly suggesting that the SNR shock is interacting with a molecular cloud. Toward this region we find that the peak is not correlated with the observed peaks, which are likely to be related to a nearby Hii region. Regarding the most flattened border of SNR G18.8+0.3, where an interaction of the SNR with dense material was previously suggested, our J=3-2 map shows no obvious indication that this is occurring.

Abstract Copyright:

Journal keyword(s): ISM: clouds - ISM: supernova remnants - HII regions

VizieR on-line data: <Available at CDS (J/A+A/580/A51): list.dat fits/*>

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
1 NAME Vela XYZ Rad 08 34.0 -45 50           ~ 1235 2
2 HRDS G018.630+00.309 bub 18 23 47.3 -12 33 26           ~ 7 0
3 WISE J182348.08-123316.1 MIR 18 23 48.0888 -12 33 16.142           ~ 1 0
4 AGAL G018.626+00.297 Y*O 18 23 50 -12 34.0           ~ 8 0
5 SNR G018.8+00.3 SNR 18 24.0 -12 23           ~ 104 0

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