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The distance to the Leo I dwarf spheroidal galaxy from the Red Giant Branch Tip

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arxiv astro-ph/0407444 v1 pith:CXQAX3YS submitted 2004-07-21 astro-ph

M. Bellazzini (INAF-OAB) , N. Gennari (Bologna Univ.) , F.R. Ferraro (Bologna Univ.) , A. Sollima (Bologna Univ.) This is my paper
classification astro-ph
keywords distancearcminbranchdwarfgalaxygiantspheroidaladopting
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We present V and I photometry of a 9.4 arcmin X 9.4 arcmin field centered on the dwarf spheroidal galaxy Leo I. The I magnitude of the tip of the Red Giant Branch is robustly estimated from two different datasets (I^{TRGB}=17.97 +0.05/-0.03). From this estimate, adopting [M/H]=-1.2 from the comparison of RGB stars with Galactic templates, we obtain a distance modulus (m-M)_0=22.02 +/- 0.13, corresponding to a distance D=254 +16/-19 Kpc.

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  1. Dwarf galaxies in non-local gravity

    astro-ph.CO 2025-07 conditional novelty 5.0 of 10

    Non-local gravity can fit the velocity dispersions of eight dwarf spheroidals without dark matter, but its scale parameter is poorly constrained and two galaxies show tension with earlier rotation-curve results.

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