Sign on

SAO/NASA ADS Astronomy Abstract Service


· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· References in the article
· Citations to the Article (10) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (3)
· NED Objects (3)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Hanny's Voorwerp . Evidence of AGN activity and a nuclear starburst in the central regions of IC 2497
Authors:
Rampadarath, H.; Garrett, M. A.; Józsa, G. I. G.; Muxlow, T.; Oosterloo, T. A.; Paragi, Z.; Beswick, R.; van Arkel, H.; Keel, W. C.; Schawinski, K.
Affiliation:
AA(Joint Institute for VLBI in Europe (JIVE), Postbus 2, 7990 AA Dwingeloo, The Netherlands; Leiden Observatory, Leiden University, PO Box 9513, 2300RA Leiden, The Netherlands; Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, Univ. Manchester, Alan Turing Building, Oxford Road, Manchester, M13 9PL, UK ), AB(Netherlands Institute for Radio Astronomy (ASTRON), Postbus 2, 7990 AA Dwingeloo, The Netherlands ; Leiden Observatory, Leiden University, PO Box 9513, 2300RA Leiden, The Netherlands; Centre for Supercomputing, Swinburne University of Technology, Mail number H39, PO Box 218, Hawthorn, Victoria 3122, Australia ), AC(Netherlands Institute for Radio Astronomy (ASTRON), Postbus 2, 7990 AA Dwingeloo, The Netherlands), AD(Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, Univ. Manchester, Alan Turing Building, Oxford Road, Manchester, M13 9PL, UK ), AE(Netherlands Institute for Radio Astronomy (ASTRON), Postbus 2, 7990 AA Dwingeloo, The Netherlands; Kapteyn Astronomical Institute, Univ. Groningen, Postbus 800, 9700 AV Groningen, The Netherlands), AF(Joint Institute for VLBI in Europe (JIVE), Postbus 2, 7990 AA Dwingeloo, The Netherlands; MTA Research Group for Physical Geodesy and Geodynamics, PO Box 91, 1521 Budapest, Hungary), AG(Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, Univ. Manchester, Alan Turing Building, Oxford Road, Manchester, M13 9PL, UK), AH(Netherlands Institute for Radio Astronomy (ASTRON), Postbus 2, 7990 AA Dwingeloo, The Netherlands), AI(Univ. Alabama, Department Physics and Astronomy, Box 870324, University of Alabama, Tuscaloosa, AL 35487-0324, USA), AJ(Univ. Yale, Department Physics, J.W. Gibbs Laboratory, 260 Whitney Avenue, Yale University, New Haven, CT 06511, USA; Einstein Fellow)
Publication:
Astronomy and Astrophysics, Volume 517, id.L8, 5 pp. (A&A Homepage)
Publication Date:
07/2010
Origin:
EDP Sciences
Astronomy Keywords:
galaxies: active, galaxies: ISM, galaxies: individual: IC 2497, galaxies: star formation
DOI:
10.1051/0004-6361/201014782
Bibliographic Code:
2010A&A...517L...8R

Abstract

We 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 105 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&sun;) of 12.4 M&sun;/yr. These results are in line with the hypothesis that the ionisation nebula ``Hanny's Voorwerp'' at a distance of ~ 15-25 kpc from the galaxy is ionised by the radiation cone of the AGN.

Table 2 is only available in electronic form at http://www.aanda.org


Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)

  New!

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints