Title:

                The Tip of the Red Giant Branch Distance to the Large Magellanic Cloud
 Authors:

                Sakai, Shoko; Zaritsky, Dennis; Kennicutt, Robert C., Jr.
 Affiliation:

                AA(Kitt Peak National Observatory, P.O. Box 26732, Tucson, AZ 85726), AB(Steward Observatory, University of
                Arizona, 933 North Cherry Avenue, Tucson, AZ 85721-0065), AC(Steward Observatory, University of Arizona,
                933 North Cherry Avenue, Tucson, AZ 85721-0065)
 Journal:

                The Astronomical Journal, Volume 119, Issue 3, pp. 1197-1204. (AJ Homepage)
 Publication Date:

                03/2000
 Origin:

                UCP
 AJ Keywords:

                GALAXIES: DISTANCES AND REDSHIFTS, GALAXIES: IRREGULAR, GALAXIES: MAGELLANIC
                CLOUDS
 Abstract Copyright:

                (c) 2000: The American Astronomical Society
 Bibliographic Code:

                2000AJ....119.1197S


                                         Abstract

We present the I-band luminosity function of the red giant branch stars in the Large Magellanic Cloud (LMC) using the data from the
Magellanic Clouds Photometric Survey (MCPS). By selecting stars in uncrowded, low-extinction regions, we observe a discontinuity in the
luminosity function at I0=14.54 mag. Identifying this feature with the tip of the red giant branch (TRGB) and adopting an absolute TRGB
magnitude of -4.05+/-0.04 based on the calibration of Lee, Freedman, & Madore, we obtain a distance modulus of 18.59+/-0.09 (random)
+/-0.16 (systematic) mag. If the theoretical TRGB calibration provided by Cassisi & Salaris is adopted instead, the derived distance would
be 4% greater. The LMC distance modulus reported here, 18.59+/-0.09, is larger by 0.09 mag (1 σ) than the value that is most
commonly used in the extragalactic distance scale calibrated by the period-luminosity relation of the Cepheid variable stars. Our TRGB
distance modulus agrees with several RR Lyrae distances to the LMC based on Hipparcos parallaxes. Finally, we note that, by using the
same MCPS data, we obtain a distance modulus of 18.29+/-0.03 mag using the red clump method, which yields a distance shorter by 0.3
mag compared with the TRGB estimate.