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|Title:||Coexistence of a non-thermal jet and a complex ultra-fast X-ray outflow in a moderately luminous AGN||Authors:||GIROLETTI, MARCELLO
Longinotti, A. L.
|Issue Date:||2017||Journal:||ASTRONOMY & ASTROPHYSICS||Number:||600||First Page:||A87||Abstract:||Context. Recent XMM-Newton observations have revealed that IRAS 17020+4544 is a very unusual example of black hole wind-produced feedback by a moderately luminous AGN in a spiral galaxy. <BR /> Aims: Since the source is known to be a radio emitter, we investigated the presence and the properties of a non-thermal component. <BR /> Methods: We observed IRAS 17020+4544 with the Very Long Baseline Array at 5, 8, 15, and 24 GHz within a month of the 2014 XMM-Newton observations. We further analysed archival data taken in 2000 and 2012. <BR /> Results: We detect the source at 5 GHz and on short baselines at 8 GHz. At 15 and 24 GHz, the source is below our baseline sensitivity for fringe fitting, indicating a lack of prominent compact features. The morphology is that of an asymmetric double, with significant diffuse emission. The spectrum between 5 and 8 GHz is rather steep (S(ν) ν<SUP>- (1.0 ± 0.2)</SUP>). Our reanalysis of the archival data at 5 and 8 GHz provides results consistent with the new observations, suggesting that flux density and structural variability are not important in this source. We put a limit on the separation speed between the main components of <0.06c. <BR /> Conclusions: IRAS 17020+4544 shows interesting features of several classes of objects: its properties are typical of compact steep spectrum sources, low power compact sources, and radio-emitting narrow line Seyfert 1 galaxies. However, it cannot be classified in any of these categories, and remains a one-of-a-kind object. <P />Reduced images (FITS files) are only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (<A href="http://220.127.116.11">http://18.104.22.168</A>) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/600/A87">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/600/A87</A> .||URI:||http://hdl.handle.net/20.500.12386/27187||URL:||https://www.aanda.org/articles/aa/full_html/2017/04/aa30161-16/aa30161-16.html||ISSN:||0004-6361||DOI:||10.1051/0004-6361/201630161||Bibcode ADS:||2017A&A...600A..87G||Fulltext:||open|
|Appears in Collections:||1.01 Articoli in rivista|
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