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Date and Time of the Query: 2019-05-21 T17:37:42 PDT
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For refcode 2001ApJ...557L..31L:
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Copyright by American Astronomical Society. Reproduced by permission
2001ApJ...557L..31L Infrared Surface Brightness Fluctuations of the Coma Elliptical Galaxy NGC 4874 and the Value of the Hubble Constant Michael C. Liu and James R. Graham Department of Astronomy, University of California at Berkeley, 601 Campbell Hall, Berkeley, CA 94720-3411 Received 2001 March 14; accepted 2001 July 10; published 2001 July 20 ABSTRACT We have used the Keck I telescope to measure K-band surface brightness fluctuations (SBFs) of NGC 4874, the dominant elliptical galaxy in the Coma Cluster. We use deep Hubble Space Telescope (HST) WFPC2 optical imaging to account for the contamination due to faint globular clusters and improved analysis techniques to derive measurements of the SBF apparent magnitude. Using a new SBF calibration that accounts for the dependence of K-band SBFs on the integrated color of the stellar population, we measure a distance modulus of 34.99 +/- 0.21 mag (100 +/- 10 Mpc) for the Coma Cluster. The resulting value of the Hubble constant is 71 +/- 8 km s^-1^ Mpc^-1^, not including any systematic error in the HST Cepheid distance scale. Subject headings: distance scale - galaxies: distances and redshifts - galaxies: elliptical and lenticular, cD - galaxies: individual (NGC 4874) - infrared: galaxies
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