Results 221 to 229 of about 51,533 (229)

Identification of a putative new virus from the <i>Jingmenvirus</i> group in ticks from wild animals in Brazil. [PDF]

open access: yesVirus Evol
Geraldini DB   +14 more
europepmc   +1 more source

The Tip of the Red Giant Branch Distances to Typa Ia Supernova Host Galaxies. V. NGC 3021, NGC 3370, and NGC 1309 and the Value of the Hubble Constant

, 2017
We present final results of a program for the determination of the Hubble constant based on the calibration of the Type Ia supernovae (SNe Ia) using the Tip of the Red Giant Branch (TRGB).
I. Jang, M. Lee
semanticscholar   +1 more source

Carbon Abundances of M92 Red Giant Branch Stars

Publications of the Astronomical Society of the Pacific, 2001
Using CCD imaging, Fusi Pecci et al. have identified a local maximum at MV = -0.4 in the giant branch luminosity function of three co-added globular clusters having metallicities [Fe/H] ~ -2.2, including M92 (NGC 6341). Theories of deep mixing predict that surface carbon abundance depletions should be produced only within stars brighter than this ...
C. F. Claver   +3 more
openaire   +2 more sources

Star Counts across the Red Giant Branch Bump and Below

The Astrophysical Journal, 2001
We present a new observable?Rbump?which is the ratio between the star counts across the red giant branch (RGB) bump and fainter RGB stars to investigate the occurrence of a deep-mixing phenomenon during these evolutionary phases. The comparison between predicted and empirical Rbump-values, based on a large and homogeneous set of Hubble Space Telescope ...
BONO G.   +3 more
openaire   +3 more sources

Evidence for non-standard mixing on the red giant branch

2008
Based on the new grid of standard stellar models computed at solar metallicity by the Geneva group (Schaller et al. 1992) with the recent OPAL opacity tables (Rogers & Iglesias 1992), we follow the theoretical evolution of the 12C/13C ratio along the red giant branch of low and intermediate mass stars.
openaire   +2 more sources

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