Results 11 to 20 of about 189,294 (310)

Theoretical Uncertainties in Red Giant Branch Evolution: The Red Giant Branch Bump [PDF]

The Astrophysical Journal, 2005
A Monte Carlo simulation exploring uncertainties in standard stellar evolution theory on the red giant branch of metal-poor globular clusters has been conducted.
Alongi M., Brian Chaboyer, Cassisi S., Cassisi S., Castellani V., Fusi Pecci F., Raffelt G. G., Salpeter E. E., Singh H. P., Stephan R. Bjork, Sweigart A. V., Weiss A.   +11 more
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THE ACS LCID PROJECT. IV. DETECTION OF THE RED GIANT BRANCH BUMP IN ISOLATED GALAXIES OF THE LOCAL GROUP [PDF]

Astronomy & Astrophysics, 2010
11 pages, accepted for publication in A& ...
M. Monelli, S. Cassisi, Edouard J. Bernard, S. L. Hidalgo, A. Aparicio, Carme Gallart, Evan D. Skillman   +6 more
openalex   +5 more sources

Calibration of the Tip of the Red Giant Branch [PDF]

The Astrophysical Journal, 2020
Abstract The tip of the red giant branch (TRGB) method provides one of the most accurate and precise means of measuring the distances to nearby galaxies. Here we present a multi-wavelength, VIJHK absolute calibration of the TRGB based on observations of TRGB stars in the Large Magellanic Cloud (LMC), grounded on a geometric distance ...
Wendy L. Freedman, Barry F. Madore, Taylor Hoyt, In Sung Jang, Rachael Beaton, Myung Gyoon Lee, Andrew Monson, Jill Neeley, Jeffrey Rich   +8 more
openalex   +3 more sources

Modeling APOKASC-3 Red Giants. I. The First Dredge-up and Red Giant Branch Bump

The Astrophysical Journal
We focus on two key diagnostics of stellar physics in red giant branch (RGB) stars: the first dredge-up (FDU) of nuclear processed material and the location of the RGB bump (RGBB).
Kaili Cao, Marc H. Pinsonneault
doaj   +3 more sources

Testing Tidal Theory Using Gaia Binaries: The Red Giant Branch

The Astrophysical Journal
Tidal interaction is a major ingredient in the theory of binary evolution. Here, we study tidal circularization in binaries with red giant primaries. We compute the tidal evolution for binaries as their primary stars evolve along the red giant branch ...
Janosz W. Dewberry, Yanqin Wu
doaj   +3 more sources

The red giant branch in the Tycho-2 catalogue [PDF]

Astronomy Letters, 2011
Based on multicolor photometry from the 2MASS and Tycho-2 catalogues, we have produced a sample of 38 368 branch red giants that has less than 1\% of admixtures and is complete within 500 pc of the Sun. The sample includes 30 671 K giants, 7544 M giants, 49 C giants, and 104 suspected supergiants or S stars.
G. A. Gontcharov
openalex   +4 more sources

Red-giant branch stellar cores as macroscopic dark matter detectors [PDF]

Physical Review D, 2022
We show that macroscopic dark matter (DM) impacts on the degenerate helium cores of red-giant branch (RGB) stars can ignite helium fusion via DM-baryon elastic scattering. The onset of helium burning leads to a characteristic drop in luminosity and rise in temperature that marks the transition to a horizontal branch star.
Christopher Dessert, Zachary A. Johnson
openalex   +5 more sources

The Aarhus red giants challenge [PDF]

Astronomy & Astrophysics, 2020
Contact. The large quantity of high-quality asteroseismic data that have been obtained from space-based photometric missions and the accuracy of the resulting frequencies motivate a careful consideration of the accuracy of computed oscillation frequencies of stellar models, when applied as diagnostics of the model properties. Aims.
Christensen-Dalsgaard, Jørgen, Christensen-Dalsgaard, Jørgen, Silva Aguirre, Víctor, Silva Aguirre, Víctor, Miller Bertolami, Marcelo M., Miller Bertolami, Marcelo M., Serenelli, A., Serenelli, A., Stello, Dennis, Stello, Dennis, Weiss, A., Weiss, A., Angelou, George, Angelou, George, Jiang, Chen, Jiang, Chen, Lebreton, Yveline, Lebreton, Yveline, Spada, Federico, Spada, Federico, Bellinger, E. P., Bellinger, E. P., Deheuvels, Sébastien, Deheuvels, Sébastien, Ouazzani, R.-M., Ouazzani, R.-M., Pietrinferni, A., Pietrinferni, A., Mosumgaard, Jakob R., Mosumgaard, Jakob R., Townsend, Richard H. D., Townsend, Richard H. D., Battich, Tiara, Bossini, Diego, Constantino, Thomas N., Eggenberger, P., Hekker, Saskia, Mazumdar, A., Miglio, Andrea, Nielsen, K. B., Salaris, M.   +40 more
openaire   +19 more sources

Red Giant Branch Stars: The Theoretical Framework [PDF]

Publications of the Astronomical Society of the Pacific, 2002
Theoretical predictions of Red Giant Branch stars' effective temperatures, colors, luminosities and surface chemical abundances are a necessary tool for the astrophysical interpretation of the visible--near infrared integrated light from unresolved stellar populations, the Color-Magnitude-Diagrams of resolved stellar clusters and galaxies, and ...
Salaris, M., Cassisi, S., Weiss, A.
openaire   +3 more sources

Galactic calibration of the tip of the red giant branch [PDF]

Publications of the Astronomical Society of Australia, 2019
AbstractIndications from Gaia data release 2 are that the tip of the red giant branch (a population II standard candle related to the helium flash in low mass stars) is close to –4 in absolute I magnitude in the Cousins photometric system. Our sample is high-latitude southern stars from the thick disk and inner halo, and our result is consistent with ...
Jeremy Mould, Gisella Clementini, Gary Da Costa   +2 more
openalex   +6 more sources