The radio corona of AR Lacertae

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.

Volume

373

Issue

1

Start page

181

Uri

http://hdl.handle.net/20.500.12386/33058

Url

https://www.aanda.org/articles/aa/abs/2001/25/aa10553/aa10553.html

Issn Identifier

0004-6361

Ads BibCode

2001A&A...373..181T

Rights

open.access

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0104376.pdf

Description

arXiv

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358.19 KB

Format

Adobe PDF

Checksum (MD5)

2706d85867292df645c6f94856a8fa77

Name

aa10553.pdf

Description

Pdf editoriale

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322.08 KB

Format

Adobe PDF

Checksum (MD5)

2a93eca4ce835cad958bf5e838082bcf

The radio corona of AR Lacertae

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