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Tip of the Red Giant Branch Distances with JWST: An Absolute Calibration in NGC 4258 and First Applications to Type Ia Supernova Hosts
Gagandeep S. Anand, Adam G. Riess, Wenlong Yuan +12
The tip of the red giant branch (TRGB) allows for the measurement of precise and accurate distances to nearby galaxies, based on the brightest ascent of low-mass red giant branch s…
Cosmicflows-2: The Data
R. Brent Tully, Helene M. Courtois, Andrew E. Dolphin +11
Cosmicflows-2 is a compilation of distances and peculiar velocities for over 8000 galaxies. Numerically the largest contributions come from the luminosity-linewidth correlation for…
Distances to Dwarf Galaxies of the Canes Venatici I Cloud
D. I. Makarov, L. N. Makarova, R. I. Uklein
We determined the spatial structure of the scattered concentration of galaxies in the Canes Venatici constellation. We redefined the distances for 30 galaxies of this region using…
A unique isolated dwarf spheroidal galaxy at D=1.9 Mpc
Dmitry Makarov, Lidia Makarova, Margarita Sharina +5
We present a photometric and spectroscopic study of the unique isolated nearby dSph galaxy KKR25. The galaxy was resolved into stars with HST/WFPC2 including old red giant branch a…
Star formation history and environment of the dwarf galaxy UGCA 92
Lidia Makarova, Dmitry Makarov, Sergey Savchenko
We present a quantitative star formation history of the nearby dwarf galaxy UGCA 92. This irregular dwarf is situated in the vicinity of the Local Group of galaxies in a zone of st…
Emission sparks around M 81 and in some dSph galaxies
Igor Karachentsev, Elena Kaisina, Serafim Kaisin +1
We use H-alpha images of three clumps of young stars situated between M81 and NGC3077 to estimate their star formation rate. Radial velocities of the clumps measured by us, as well…