Chawner, H;
Howard, ADP;
Gomez, HL;
Matsuura, M;
Priestley, F;
Barlow, MJ;
De Looze, I;
... Dunne, L; + view all
(2020)
A Galactic Dust Devil: far-infrared observations of the Tornado Supernova Remnant candidate.
Monthly Notices of the Royal Astronomical Society
10.1093/mnras/staa2925.
(In press).
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Abstract
We present complicated dust structures within multiple regions of the candidate supernova remnant (SNR) the ‘Tornado’ (G357.7−0.1) using observations with Spitzer and Herschel. We use Point Process Mapping, PPMAP, to investigate the distribution of dust in the Tornado at a resolution of 8″, compared to the native telescope beams of 5 − 36″. We find complex dust structures at multiple temperatures within both the head and the tail of the Tornado, ranging from 15 to 60 K. Cool dust in the head forms a shell, with some overlap with the radio emission, which envelopes warm dust at the X-ray peak. Akin to the terrestrial sandy whirlwinds known as ‘Dust Devils’, we find a large mass of dust contained within the Tornado. We derive a total dust mass for the Tornado head of 16.7 M⊙, assuming a dust absorption coefficient of κ300 =0.56m2kg−1, which can be explained by interstellar material swept up by a SNR expanding in a dense region. The X-ray, infra-red, and radio emission from the Tornado head indicate that this is a SNR. The origin of the tail is more unclear, although we propose that there is an X-ray binary embedded in the SNR, the outflow from which drives into the SNR shell. This interaction forms the helical tail structure in a similar manner to that of the SNR W50 and microquasar SS433.
| Type: | Article |
|---|---|
| Title: | A Galactic Dust Devil: far-infrared observations of the Tornado Supernova Remnant candidate |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/staa2925 |
| Publisher version: | https://doi.org/10.1093/mnras/staa2925 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | ISM: supernova remnants, infrared: ISM, submillimetre: ISM, stars |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10112142 |
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