Infrared Surface Brightness Fluctuations of Coma Cluster Ellipticals

Details Infrared Surface Brightness Fluctuations of Coma Cluster Ellipticals Infrared Surface Brightness Fluctuations of Coma Cluster Ellipticals

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...188.1215l&link_type=abstract

American Astronomical Society, 188th AAS Meeting, #12.15; Bulletin of the American Astronomical Society, Vol. 28, p.843

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We present preliminary results from our program to measure infrared surface brightness fluctuations (SBFs) of elliptical galaxies using the 10-meter Keck Telescope. Unlike most cosmological distance indicators, SBF measurements are appealing because of their well-understood physical basis. As SBFs in ellipticals are dominated by late-type stars, IR measurements offer the potential to measure distances 2--3 times as far as previous optical SBF work. We have successfully detected K-band (2.2 mu m) SBFs of Coma cluster ellipticals (cz ~ 7000 km/s), the most distant SBF measurements to date. Combined with our ongoing effort at the Lick 3-meter telescope to calibrate the SBF zero point, distance measurements out to 100 h(-1) Mpc and, consequently, a determination of the Hubble Constant uncontaminated by local peculiar velocities seem within reach.

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