Chandra Observations of ULIRGs: Extended Hot Gas Halos in Merging Galaxies

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dc.creatorHuo, Z. Y.
dc.creatorXia, X. Y.
dc.creatorXue, S. J.
dc.creatorMao, S.
dc.creatorDeng, Z. G.
dc.date2003-12-06
dc.date2004-05-09
dc.date.accessioned2026-07-07T10:47:45Z
dc.date.available2026-07-07T10:47:45Z
dc.descriptionWe study the properties of hot gaseous halos in 10 nearby ultraluminous IRAS galaxies observed with the ACIS instrument on board Chandra. For all sample galaxies, diffuse soft X-ray emissions are found within ~10 kpc of the central region; their spectra are well fitted by a MEKAL model plus emission lines from alpha-elements and other ions. The temperature of the hot gas is about 0.7 keV and metallicity is about 1 solar. Outside the central region, extended hot gaseous halos are found for nine out of the ten ULIRGs. Most spectra of these extended halos can be fitted with a MEKAL model with a temperature of about 0.6 keV and a low metallicity (~ 0.1 solar). We discuss the implications of our results on the origin of X-ray halos in elliptical galaxies and the feedback processes associated with starbursts.
dc.description31 pages, 6 figuers, ApJ in press, accepted version
dc.identifierhttps://arxiv.org/abs/astro-ph/0312185
dc.identifierhttp://arxiv.org/abs/astro-ph/0312185
dc.identifierAstrophys.J.611:208-219,2004
dc.identifierdoi:10.1086/422164
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/183643
dc.subjectAstrophysics
dc.titleChandra Observations of ULIRGs: Extended Hot Gas Halos in Merging Galaxies
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