Please use this identifier to cite or link to this item:
|Title:||Unveiling the 100 pc scale nuclear radio structure of NGC 6217 with e-MERLIN and the VLA||Authors:||Williams, D. R. A.
McHardy, I. M.
BALDI, RANIERI DIEGO
Beswick, R. J.
Argo, M. K.
Dullo, B. T.
Fenech, D. M.
Knapen, J. H.
Muxlow, T. W. B.
|Issue Date:||2019||Journal:||MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY||Number:||486||Issue:||4||First Page:||4962||Abstract:||We present high-sensitivity 1.51 GHz e-MERLIN (e-Multi-Element Radio-Linked Interferometer Network) radio images of the nearby galaxy NGC 6217. We resolve the compact radio source at the centre of NGC 6217 for the first time, finding a twin-lobed structure with a total linear size of ∼4 arcsec (∼400 pc). The radio source does not have a compact central core, but there is an unresolved hotspot near the outer edge of the southern lobe. Combining our e-MERLIN data with new VLA (Very Large Array) A-Array data and archival multiwavelength data, we explore possible scenarios which might explain this complex radio morphology. We conclude that this radio source is most likely powered by a low-luminosity active galactic nucleus but with a possible important contribution from nuclear star formation. We also investigate the origin of a putative X-ray jet in NGC 6217, previously suggested in the literature. This `jet' consists of three X-ray `knots' in a line, pointed away from the nucleus, with a total size of ∼3 arcmin (∼15 kpc). We find no extended radio emission coincident with the `jet'. An additional compact radio source, aligned with the knots but without an X-ray counterpart is detected. We detect infrared/optical sources falling within the X-ray extraction regions of the `knots', but note that these sources could be chance associations due to high source density around the target field and we estimate the probability of three randomly aligned X-ray sources to be 0.3 per cent in this field.||URI:||http://hdl.handle.net/20.500.12386/32481||URL:||https://academic.oup.com/mnras/article/486/4/4962/5482084||ISSN:||0035-8711||DOI:||10.1093/mnras/stz1135||Bibcode ADS:||2019MNRAS.486.4962W||Fulltext:||open|
|Appears in Collections:||1.01 Articoli in rivista|
Show full item record
Files in This Item:
Items in DSpace are published in Open Access, unless otherwise indicated.