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http://hdl.handle.net/20.500.12386/33058
Title: | The radio corona of AR Lacertae | Authors: | TRIGILIO, CORRADO BUEMI, CARLA SIMONA UMANA, Grazia Maria Gloria Rodonò, M. LETO, PAOLO Beasley, A. J. PAGANO, Isabella |
Issue Date: | 2001 | Journal: | ASTRONOMY & ASTROPHYSICS | Number: | 373 | Issue: | 1 | First Page: | 181 | Abstract: | We present multifrequency VLA and VLBA observations at 8.4 GHz of the RS CVn system {AR Lac}, that were performed in autumn 1997 simultaneously with X-ray observations obtained from Rodonòet al. (\cite{Rodono}). Our VLBA data indicate a resolved source with dimension close to the system separation, while the study of the flux density curve reveals a small amplitude outside of the eclipse variability. The derived five-frequencies spectra, combined with the size information from VLBA data, are compared with gyrosynchrotron emission from a two component structured source. A comparison with the results of the X-ray observations allow us to exclude the possibility that a thermal gyrosynchrotron is responsible for the radio emission, but it is compatible with the hypothesis of co-spatial X-ray and radio emitting sources. | URI: | http://hdl.handle.net/20.500.12386/33058 | URL: | https://www.aanda.org/articles/aa/abs/2001/25/aa10553/aa10553.html | ISSN: | 0004-6361 | DOI: | 10.1051/0004-6361:20010566 | Bibcode ADS: | 2001A&A...373..181T | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
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File | Description | Size | Format | |
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aa10553.pdf | Pdf editoriale | 322.08 kB | Adobe PDF | View/Open |
0104376.pdf | arXiv | 358.19 kB | Adobe PDF | View/Open |
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