X-ray emission from NGC 1808: more than a complex starburst

17 pages, 14 figures.-- arXiv:0506762 astro-ph pre-print supplied.-- Final full-text version of the paper available at: http://dx.doi.org/10.1051/0004-6361:20053022.

Detalles Bibliográficos
Autores: Jiménez-Bailón, Elena, Santos-Lleó, María, Dahlem, M., Ehle, M., Mas-Hesse, J. Miguel, Guainazzi, Matteo, Heckman, T. M., Weaver, K. A.
Tipo de recurso: artículo
Fecha de publicación:2005
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/6770
Acceso en línea:http://hdl.handle.net/10261/6770
Access Level:acceso abierto
Palabra clave:Galaxies: active
Galaxies: nuclei
Galaxies: general
X-ray general
Galaxies: evolution
Galaxies: halos
Galaxies: starburst
Individual: NGC 1808
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spelling X-ray emission from NGC 1808: more than a complex starburstJiménez-Bailón, ElenaSantos-Lleó, MaríaDahlem, M.Ehle, M.Mas-Hesse, J. MiguelGuainazzi, MatteoHeckman, T. M.Weaver, K. A.Galaxies: activeGalaxies: nucleiGalaxies: generalX-ray generalGalaxies: evolutionGalaxies: halosGalaxies: starburstIndividual: NGC 180817 pages, 14 figures.-- arXiv:0506762 astro-ph pre-print supplied.-- Final full-text version of the paper available at: http://dx.doi.org/10.1051/0004-6361:20053022.SIMBAD Objects associated to the paper available at: http://simbad.u-strasbg.fr/simbo.pl?bibcode=2005A%26A...442..861J.Earlier observations of NGC 1808 in various wavebands (X-ray, optical, near-infrared, radio) provided evidence for the existence of either a starburst or a Seyfert 2 nucleus. We here present the results of multiwavelength XMM-Newton and Chandra observations, which directly prove the co-existence of thermal diffuse plasma and non-nuclear unresolved point-like sources associated with the starburst activity, along with a Low Luminosity Active Galactic Nucleus (LLAGN) or an Ultra Luminous X-ray source (ULX). The broad bandwidth of XMM-Newton allows us to show that the unresolved nuclear source in NGC 1808 dominates the hard X-ray spectrum, while the emission in the soft regime, below 1 keV, is dominated by a thermal component associated to an extended starburst. Both EPIC and RGS data provide reliable detections of a number of emission lines from heavy elements, with abundances ranging from roughly 0.7 to 2.2 Z_O for different elements. However, no 6.4 keV Fe Kα fluorescence line emission was detected. The analysis of the nuclear region of NGC 1808 allows us to detect and disentangle the contribution of an unresolved nuclear X-ray source and the starhurst region, but the exact nature of the nucleus remains unknown. The observed luminosity of NGC 1808 is L_2-10 keV = (1.61 ± 0.06)× 10e40 erg s-1. A comparison of our OM 212 nm image with a CTIO 4-m telescope Hα frame shows a good general correspondence between the emission from massive stars and warm ionized gas, with minor deviations near the ends of the bar in NGC 1808. An aditional, very soft thermal spectral component with kT ~ 0.1 keV has been discovered in the XMM-Newton spectral analysis, which most likely originates from the halo of NGC 1808.EJB, MSLl and JMMH have been supported by Spanish MEC under grant AYA2001-3939-C03-02.Peer reviewedEDP SciencesMinisterio de Educación y Ciencia (España)200820082005info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501760156 bytesapplication/pdfhttp://hdl.handle.net/10261/6770http://dx.doi.org/10.1051/0004-6361:20053022reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglésinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/67702026-05-22T06:33:51Z
dc.title.none.fl_str_mv X-ray emission from NGC 1808: more than a complex starburst
title X-ray emission from NGC 1808: more than a complex starburst
spellingShingle X-ray emission from NGC 1808: more than a complex starburst
Jiménez-Bailón, Elena
Galaxies: active
Galaxies: nuclei
Galaxies: general
X-ray general
Galaxies: evolution
Galaxies: halos
Galaxies: starburst
Individual: NGC 1808
title_short X-ray emission from NGC 1808: more than a complex starburst
title_full X-ray emission from NGC 1808: more than a complex starburst
title_fullStr X-ray emission from NGC 1808: more than a complex starburst
title_full_unstemmed X-ray emission from NGC 1808: more than a complex starburst
title_sort X-ray emission from NGC 1808: more than a complex starburst
dc.creator.none.fl_str_mv Jiménez-Bailón, Elena
Santos-Lleó, María
Dahlem, M.
Ehle, M.
Mas-Hesse, J. Miguel
Guainazzi, Matteo
Heckman, T. M.
Weaver, K. A.
author Jiménez-Bailón, Elena
author_facet Jiménez-Bailón, Elena
Santos-Lleó, María
Dahlem, M.
Ehle, M.
Mas-Hesse, J. Miguel
Guainazzi, Matteo
Heckman, T. M.
Weaver, K. A.
author_role author
author2 Santos-Lleó, María
Dahlem, M.
Ehle, M.
Mas-Hesse, J. Miguel
Guainazzi, Matteo
Heckman, T. M.
Weaver, K. A.
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Educación y Ciencia (España)
dc.subject.none.fl_str_mv Galaxies: active
Galaxies: nuclei
Galaxies: general
X-ray general
Galaxies: evolution
Galaxies: halos
Galaxies: starburst
Individual: NGC 1808
topic Galaxies: active
Galaxies: nuclei
Galaxies: general
X-ray general
Galaxies: evolution
Galaxies: halos
Galaxies: starburst
Individual: NGC 1808
description 17 pages, 14 figures.-- arXiv:0506762 astro-ph pre-print supplied.-- Final full-text version of the paper available at: http://dx.doi.org/10.1051/0004-6361:20053022.
publishDate 2005
dc.date.none.fl_str_mv 2005
2008
2008
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/6770
url http://hdl.handle.net/10261/6770
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 760156 bytes
application/pdf
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv http://dx.doi.org/10.1051/0004-6361:20053022
reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
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