The Tip of the Red Giant Branch as a Distance Indicator for Resolved Galaxies

Details The Tip of the Red Giant Branch as a Distance Indicator for Resolved Galaxies The Tip of the Red Giant Branch as a Distance Indicator for Resolved Galaxies

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...417..553l&link_type=abstract

Astrophysical Journal v.417, p.553

Astronomy and Astrophysics

Astronomy

386

Galaxies: Distances And Redshifts, Stars: Distances, Stars: Evolution, Stars: Giants, Stars: Hertzsprung-Russell Diagram, Stars: Variables: Cepheids

Scientific paper

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 o{ the TRGB method are discussed.

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