The nature of nuclear X-ray sources in nearby late-type galaxies

Details The nature of nuclear X-ray sources in nearby late-type galaxies The nature of nuclear X-ray sources in nearby late-type galaxies

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008xmm..prop...75m&link_type=abstract

XMM-Newton Proposal ID #06029201

Physics

Galaxies, Galactic Surveys, Ngc 4561

Scientific paper

We initiated a Chandra program to search for low-level nuclear activity in a representative sample of low-mass galaxies within 20 Mpc. We propose XMM-Newton observations of three late-type galaxies, Sdm-Sc-Sbc, in each of which a nuclear X-ray source was detected with Chandra. X-ray spectra and optical-X-ray spectral energy distributions obtained with XMM-Newton will secure identification of X-ray sources as either AGNs, binaries or star clusters. We will understand characteristics of low luminosity AGNs, if present. Discovering AGNs in bulge-less galaxies will be exciting as it will imply that bulges are not necessary for existence of black holes. This will have important consequences toward understanding the formation and co-evolution of galaxies and black holes.

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