NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-16 T15:47:21 PDT
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For refcode 1993ApJ...417..553L:
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1993ApJ...417..553L THE TIP OF THE RED GIANT BRANCH AS A DISTANCE INDICATOR FOR RESOLVED GALAXIES MYUNG GYOON LEE AND WENDY L. FREEDMAN Carnegie Observatories, 813 Santa Barbara Street, Pasadena, CA 91101 AND BARRY F. MADORE NASA/IPAC Extragalactic Database, Infrared Processing and Analysis Center, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91101 Received 1993 March 4; accepted 1993 May 18 ABSTRACT We show that the I magnitude of the tip of the first-ascent red giant branch (TRGB) of low-mass stars is a distance indicator for resolved galaxies with metal-poor ([Fe/H] < -0.7 dex) old populations, having a precision comparable to primary distance indicators such as Cepheids and RR Lyraes. A comparison of the distances to resolved galaxies based on the TRGB with those derived from Cepheids and RR Lyraes shows that they agree within +/- 0.1 mag. Advantages of the TRGB method are discussed. Subject headings: Cepheids - galaxies: distances and redshifts Hertzsprung-Russell (H-R) diagram stars: distances - stars: evolution - stars: giants
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