The Araucaria Project. Infrared TRGB distances to the Carina and Fornax dwarf spheroidal galaxies
作者： Grzegorz Pietrzyński , Marek Górski , Wolfgang Gieren , Valentin D. Ivanov , Fabio Bresolin
DOI: 10.1088/0004-6256/138/2/459
关键词: Distance modulus 、 Physics 、 K band 、 Local Group 、 RR Lyrae variable 、 Astronomy 、 Infrared 、 Galaxy 、 Red-giant branch 、 Astrophysics
摘要: We present distance determinations for two Local Group dwarf spheroidal galaxies, Carina and Fornax, based on the near-infrared magnitudes of tip red giant branch (TRGB). For we derive true moduli 20.09 20.13 mag in J K bands, respectively, while Fornax same modulus 20.84 was derived both filters. The statistical errors these are order 0.03-0.04 mag, whereas systematic uncertainties distances 0.12 band 0.14 band. obtained from TRGB method this paper agree very well with those galaxies optical calibrations method, their horizontal branches, RR Lyrae variables, clumps.
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