Vamvatira-Nakou, C;
Hutsemekers, D;
Royer, P;
Waelkens, C;
Groenewegen, MAT;
Barlow, MJ;
(2016)
Herschel observations of the nebula M1-67 around the Wolf-Rayet star WR 124^{⋆,⋆⋆}.
Astronomy & Astrophysics
, 588
, Article A92. 10.1051/0004-6361/201527667.
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Abstract
Infrared Herschel imaging and spectroscopic observations of the nebula M1-67 around the Wolf-Rayet star WR 124 have been obtained along with optical imaging observations. The infrared images reveal a clumpy dusty nebula that extends up to 1 pc. The comparison with the optical images shows that the ionized gas nebula coincides with the dust nebula, the dust and the gas being mixed together. A photodissociation region is revealed from the infrared spectroscopic analysis. The analysis of the infrared spectrum of the nebula, where forbidden emission lines of ionized elements were detected, showed that the nebula consists of mildly processed material with the calculated abundance number ratios being N/O = 1.0 ± 0.5 and C/O = 0.46 ± 0.27. Based on a radiative transfer model, the dust mass of the nebula was estimated to be 0.22 M_{⊙} with a population of large grains being necessary to reproduce the observations. The comparison of the mass-loss rate and the abundance ratios to theoretical models of stellar evolution led to the conclusion that the nebular ejection took place during a RSG/YSG evolutionary phase of a central star with an initial mass of 32 M_{⊙}.
| Type: | Article |
|---|---|
| Title: | Herschel observations of the nebula M1-67 around the Wolf-Rayet star WR 124^{⋆,⋆⋆} |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1051/0004-6361/201527667 |
| Publisher version: | https://doi.org/10.1051/0004-6361/201527667 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisherís terms and conditions. |
| Keywords: | circumstellar matter, stars: massive, stars: mass-loss, stars: Wolf-Rayet, stars: individual: WR 124 |
| 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/10093760 |
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