Searching for Intragroup Light in Multiple Galaxy Groups

Details Searching for Intragroup Light in Multiple Galaxy Groups Searching for Intragroup Light in Multiple Galaxy Groups

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21714925f&link_type=abstract

American Astronomical Society, AAS Meeting #217, #149.25; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

Intracluster stars, stars outside of galaxies, have been shown to be common in galaxy clusters, and contain approximately 20% of the total stellar luminosity. However, the amount of intragroup light in galaxy groups is substantially less certain. Estimates of the intragroup luminosity fraction range from 0% to 46% of the total light. This is extremely unfortunate, since the majority of galaxies are in groups, and theoretical work shows that the group environment can have strong effects on the production of intracluster/intragroup light.
Here, we give an update on our efforts to determine the amount and spatial distribution of intragroup light in both normal and compact groups. We will present data from the 0.6m Burrell Schmidt and the KPNO 2.1m of four Hickson and four normal galaxy groups, including the nearby Leo I group that is known to have intergalactic star formation. Using the techniques of deep surface photometry, we can reach faint surface brightnesses of 26-27 magnitudes per square arcsecond. We will show tidal features found in these groups, and provide estimates of the total intragroup fraction.

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