Ladjal, D;
Barlow, MJ;
Groenewegen, MAT;
Ueta, T;
Blommaert, JADL;
Cohen, M;
Decin, L;
... Wesson, R; + view all
(2010)
Herschel PACS and SPIRE imaging of CW Leonis.
Astronomy & Astrophysics
, 518
, Article L141. 10.1051/0004-6361/201014658.
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Abstract
Herschel PACS and SPIRE images have been obtained over a 30' × 30' area around the well-known carbon star CW Leo (IRC +10 216). An extended structure is found in an incomplete arc of ~22' diameter, which is cospatial with the termination shock due to interaction with the interstellar medium (ISM) as defined by Sahai & Chronopoulos from ultraviolet GALEX images. Fluxes are derived in the 70, 160, 250, 350, and 550 μm bands in the region where the interaction with the ISM takes place, and this can be fitted with a modified black body with a temperature of 25 ± 3 K. Using the published proper motion and radial velocity for the star, we derive a heliocentric space motion of 25.1 km s-1. Using the PACS and SPIRE data and the analytical formula of the bow shock structure, we infer a de-projected standoff distance of the bow shock of R0 = (8.0 ± 0.3) × 1017 cm. We also derive a relative velocity of the star with respect to the ISM of (106.6 ± 8.7)/ km s-1, where nISM is the number density of the local ISM.
| Type: | Article |
|---|---|
| Title: | Herschel PACS and SPIRE imaging of CW Leonis |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1051/0004-6361/201014658 |
| Publisher version: | https://doi.org/10.1051/0004-6361/201014658 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Astronomy & Astrophysics, circumstellar matter, stars: AGB and post-AGB, stars: carbon, stars: mass-loss, stars: individual: CW Leo, MASS-LOSS, CIRCUMSTELLAR ENVELOPE, INTERSTELLAR-MEDIUM, MULTIPLE SHELLS, CARBON STARS, BOW SHOCK, IRC+10216, UNCERTAINTIES, EVOLUTION |
| 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/10116256 |
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Herschel PACS and SPIRE imaging of CW Leonis. (deposited 30 Nov 2020 14:59)
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