Hanny's Voorwerp Evidence of AGN activity and a nuclear starburst in the central regions of IC 2497

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dc.contributor.authorRampadarath, H.
dc.contributor.authorGarrett, M. A.
dc.contributor.authorJozsa, G. I. G.
dc.contributor.authorMuxlow, T.
dc.contributor.authorOosterloo, T. A.
dc.contributor.authorParagi, Z.
dc.contributor.authorBeswick, R.
dc.contributor.authorvan Arkel, H.
dc.contributor.authorKeel, W. C.
dc.contributor.authorSchawinski, K.
dc.contributor.otherLeiden University
dc.contributor.otherLeiden University - Excl LUMC
dc.contributor.otherUniversity of Manchester
dc.contributor.otherJodrell Bank Centre for Astrophysics
dc.contributor.otherSwinburne University of Technology
dc.contributor.otherUniversity of Groningen
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.contributor.otherYale University
dc.date.accessioned2018-09-25T21:04:15Z
dc.date.available2018-09-25T21:04:15Z
dc.date.issued2010
dc.description.abstractWe present high-and intermediate resolution radio observations of the central region in the spiral galaxy IC 2497, performed using the European VLBI Network (EVN) at 18 cm, and the Multi-Element Radio Linked Interferometer Network (MERLIN) at 18 cm and 6 cm. We detect two compact radio sources, with brightness temperatures above 10(5) K, suggesting that they are related to AGN activity. We show that the total 18 cm radio emission from the galaxy is dominated neither by these compact sources nor large-scale emission, but extended emission confined within a sub-kpc central region. IC 2497 therefore appears as a typical luminous infrared galaxy that exhibits a nuclear starburst with a massive star formation rate (M > 5 M(circle dot)) of 12.4 M(circle dot)/yr. These results are in line with the hypothesis that the ionisation nebula "Hanny's Voorwerp" at a distance of similar to 15-25 kpc from the galaxy is ionised by the radiation cone of the AGN.en_US
dc.format.mimetypeapplication/pdf
dc.identifier.citationRampadarath, H. et al. (2010): Hanny’s Voorwerp Evidence of AGN activity and a nuclear starburst in the central regions of IC 2497. Astronomy & Astrophysics, 517(L8). DOI: https://doi.org/10.1051/0004-6361/201014782
dc.identifier.doi10.1051/0004-6361/201014782
dc.identifier.orcidhttps://orcid.org/0000-0001-5464-0888
dc.identifier.orcidhttps://orcid.org/0000-0002-0616-6971
dc.identifier.orcidhttps://orcid.org/0000-0002-5195-335X
dc.identifier.orcidhttps://orcid.org/0000-0001-5797-8796
dc.identifier.urihttp://ir.ua.edu/handle/123456789/3972
dc.languageEnglish
dc.language.isoen_US
dc.publisherEDP Sciences
dc.subjectgalaxies: active
dc.subjectgalaxies: ISM
dc.subjectgalaxies: individual: IC 2497
dc.subjectgalaxies: star formation
dc.subjectINFRARED GALAXIES
dc.subjectRADIO
dc.subjectPOWERFUL
dc.subjectAstronomy & Astrophysics
dc.titleHanny's Voorwerp Evidence of AGN activity and a nuclear starburst in the central regions of IC 2497en_US
dc.typetext
dc.typeArticle

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