Radio-continuum jets around the peculiar galaxy pair ESO 295-IG022

Article


Filipovic, M.D., Crawford, E.J., Jones, P.A. and White G.L.. 2010. "Radio-continuum jets around the peculiar galaxy pair ESO 295-IG022 ." Serbian Astronomical Journal. 2010 (181), pp. 31-37. https://doi.org/10.2298/SAJ1081031F
Article Title

Radio-continuum jets around the peculiar galaxy pair ESO 295-IG022

ERA Journal ID41911
Article CategoryArticle
AuthorsFilipovic, M.D., Crawford, E.J., Jones, P.A. and White G.L.
Journal TitleSerbian Astronomical Journal
Journal Citation2010 (181), pp. 31-37
Number of Pages7
Year2010
PublisherAstronomical Observatory of Belgrade
Place of PublicationSerbia
ISSN1450-698X
Digital Object Identifier (DOI)https://doi.org/10.2298/SAJ1081031F
Web Address (URL)https://doiserbia.nb.rs/Article.aspx?ID=1450-698X1081031F
Abstract

We report new radio-continuum observations with the Australia Telescope Compact Array (ATCA) of the region surrounding the peculiar galaxy pair ESO 295-IG022 at the centre of the poor cluster Abell S0102. We observed this cluster at wavelengths of λ=20/13 and 6/3 cm with the ATCA 6 km array. With these configurations, we achieved a resolution of ~2" at 3 cm which is sufficient to resolve the jet-like structure of ~3' length detected at 20 cm. From our new high resolution images at 6 and 3 cm we confirm the presence of a double jet structure, most likely originating from the northern galaxy (ESO 295-IG022-N), bent and twisted towards the south. We found the spectral index of the jet to be very steep (α=-1.32). No point source was detected that could be associated with the core of ESO 295-IG022-N. On the other hand, ESO 295-IG022-S does not show any jet structure, but does show a point radio source. This source has variable flux and spectral index, and appears to be superposed on the line-of-sight of the jets (seen at 20-cm) originating from the northern galaxy ESO 295-IG022-N. Finally, regions of very high and somewhat well ordered polarisation were detected at the level of 70%.

KeywordsGalaxies: clusters: individual: Abell S0102; Galaxies: individual: ESO 295-IG022; Galaxies: interactions; Galaxies: jets; Radio continuum: galaxies; X-rays: galaxies
Page Range31-37
Byline AffiliationsUniversity of Western Sydney
University of New South Wales
University of Chile, Chile
Charles Sturt University
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