Tip of the Red Giant Branch Distance to NGC 3379

Details Tip of the Red Giant Branch Distance to NGC 3379 Tip of the Red Giant Branch Distance to NGC 3379

Apr 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aspc...92..548s&link_type=abstract

Formation of the Galactic Halo...Inside and Out, ASP Conference Series, Vol. 92, 1996, Heather Morrison and Ata Sarajedini, eds.

Physics

Scientific paper

We report the detection of individually resolved stars in NGC 3379, a giant elliptical galaxy in the Leo I Group. The bright end of its stellar luminosity function has a logarithmic slope of 0.6 dex/mag, which is fully consistent with these stars being Population II red giants. Identifying an abrupt discontinuity in the luminosity function at I = 26.29 +/- 0.10 mag with the tip of the first--ascent red giant branch and adopting M_I (TRGB) = -4.0 +/- 0.1 mag, we obtain the distance modulus of 30.29 +/- 0.14 mag, corresponding to a linear distance to NGC 3379 of 11.4 +/- 0.8 Mpc.

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