Extended far-UV emission surrounding asymptotic giant branch stars as seen by GALEX
- Author(s)
- V. Rǎstǎu, M. Mečina, F. Kerschbaum, H. Olofsson, M. Maercker, M. Drechsler, X. Strottner, L. Mulato
- Abstract
Aims. Our goal is to study the long-term mass-loss rate characteristics of asymptotic giant branch (AGB) stars through wind-wind and wind-interstellar medium interaction. Methods. Far-ultraviolet (FUV) images from the GALEX survey are used to investigate extended UV emission associated with AGB stars. Results. FUV emission was found towards eight objects. The emission displays different shapes and sizes; interaction regions were identified, often with infrared counterparts, but no equivalent near-ultraviolet (NUV) emission was found in most cases. Conclusions. The FUV emission is likely attributed to shock-excited molecular hydrogen, considering the lack of NUV emission and the large space velocities of the objects, and makes it possible to trace old structures that are too faint to be observed, for instance, in the infrared.
- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- Chalmers University of Technology, Sternwarte Bärenstein, Montfraze, 2SPOT (Southern Spectroscopic Observatory Team)
- Journal
- Astronomy and Astrophysics
- Volume
- 680
- No. of pages
- 10
- ISSN
- 0004-6361
- DOI
- https://doi.org/10.1051/0004-6361/202346120
- Publication date
- 12-2023
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103003 Astronomy, 103004 Astrophysics
- Keywords
- ASJC Scopus subject areas
- Astronomy and Astrophysics, Space and Planetary Science
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/8bc6fb73-fb8f-470e-a5a2-7b8e2a9c449f