Accretion onto nuclear black holes in early type galaxies: comparing field vs. clusters

Details Accretion onto nuclear black holes in early type galaxies: comparing field vs. clusters Accretion onto nuclear black holes in early type galaxies: comparing field vs. clusters

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009cxo..prop.2861g&link_type=abstract

Chandra proposal ID #11620915

Computer Science

Scientific paper

IF black holes are indeed ubiquitous in galactic nuclei, little is known about the frequency and intensity of their activity, the more so at the low-mass/low-luminosity end. Our cycle 8 observations of the Virgo clusters have delivered the most comprehensive measurement of the duty cycle, showing that although black holes are present even in low mass spheroids, activity is a strong function of mass. However, nuclear activity is also expected to be a strong function of environment, which regulates the gas supply through processes such as ram pressure stripping and merging. We propose the first systematic study of the effects of the environment on low level accretion, by combining our Virgo study with new observations and archival data of a volume limited sample of 100 field spheroids.

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