Cores of Early-Type Galaxies

Details Cores of Early-Type Galaxies Cores of Early-Type Galaxies

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992hst..prop.3912f&link_type=abstract

HST Proposal ID #3912

Computer Science

Hst Proposal Id #3912

Scientific paper

We are conducting a comprehensive imaging survey of the cores of early-type galaxies and spiral bulges. The high spatial resolving power of deconvolved HST images will be used to measure core structure parameters over a wide range of core size and luminosity. PC images in F555W will be taken of 45 galaxies covering a range of 9 magnitudes in luminosity. Ground- based photometry and kinematic data will be obtained to augment small-radii HST data. Observations will be used to constuct dynamical models of the core regions using a maximum-entropy technique with the particular goal of searching for BHs in selected galaxy candidates. Existing HST images of galaxy cores are revealing a wide variety of different types of structure including the prevalence of nuclear cusps. At the same time, ground-based data suggest that cores can retain information about merger processes and accretion events for up to Gyrs after they occur. In studying systematic core properties over a wide range of galaxies, we expect to learn much about how spheroidal galaxies were formed.

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