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Title: Herschel PACS and SPIRE imaging of CW Leonis
Authors: Ladjal, Djazia ×
Barlow, M. J
Groenewegen, M. A. T
Ueta, T
Blommaert, Joris
Cohen, M
Decin, Leen
De Meester, Wim
Exter, Katrina
Gear, W. K
Gomez, H. L
Hargrave, P. C
Huygen, Eric
Ivison, R. J
Jean, Christophe
Kerschbaum, F
Leeks, S. J
Lim, T. L
Olofsson, G
Polehampton, E
Posch, T
Regibo, Sara
Royer, Pierre
Sibthorpe, B
Swinyard, B. M
Vandenbussche, Bart
Waelkens, Christoffel
Wesson, R #
Issue Date: Jul-2010
Publisher: Edp sciences s a
Series Title: Astronomy & astrophysics vol:518 pages:1-4
Article number: L141
Abstract: Herschel PACS and SPIRE images have been obtained over a 30' x 30' area around the well-known carbon star CW Leo (IRC + 10 216). An extended structure is found in an incomplete arc of similar to 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 mu m 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 R-0 = (8.0 +/- 0.3) x 10(17) cm. We also derive a relative velocity of the star with respect to the ISM of (106.6 +/- 8.7)/ root n(ISM) km s (1), where n(ISM) is the number density of the local ISM.
ISSN: 0004-6361
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Institute of Astronomy
× corresponding author
# (joint) last author

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