Identity of Nuclear X-ray Sources in Bulge-less Galaxies

Details Identity of Nuclear X-ray Sources in Bulge-less Galaxies Identity of Nuclear X-ray Sources in Bulge-less Galaxies

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009xmm..prop...94m&link_type=abstract

XMM-Newton Proposal ID #06524502

Physics

Galaxies, Galactic Surveys, Ngc 1493, Ngc 2500

Scientific paper

We initiated a Chandra program to search for low-level nuclear activity in a representative sample of late-type galaxies within 20 Mpc. We propose XMM-Newton observations of two late-type galaxies, Scd and Sd, in both 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 the identification of X-ray sources as either AGNs, low-mass X-ray binaries or star clusters. Discovering secure AGNs in these 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 towards understanding the formation and co-evolution of black holes and galaxies.

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