Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.5510m&link_type=abstract
American Astronomical Society, AAS Meeting #211, #55.10; Bulletin of the American Astronomical Society, Vol. 39, p.827
Astronomy and Astrophysics
Astronomy
Scientific paper
The Tip of the Red Giant Branch (TRGB) is a distance indicator of comparable accuracy to the Cepheid Period-Luminosity relation. We analyzed HST/ACS archival data of three previously unstudied dwarf galaxies that are companions to NGC4258 and located the TRGBs in their I-band Luminosity Functions (LF). By doing so, we obtained an estimate of the distance to NGC4258 that is comparable to the one derived from Cepheids located within the galaxy itself.
Munshi's research was supported by the NOAO/KPNO Research Experiences for Undergraduates (REU) Program which is funded by the National Science Foundation through Scientific Program Order No. 3 (AST-0243875) of the Cooperative Agreement No. AST-0132798 between the Association of Universities for Research in Astronomy (AURA) and the NSF.
Macri Lucas
Munshi Ferah
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