Results 31 to 40 of about 182,899 (301)
The Red Giant Branch luminosity function bump [PDF]
Astronomy & Astrophysics, 2003 11 pages, accepted for publication in A& ...
Maurizio Salaris +9 more
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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 ...
Mould, Jeremy +2 more
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The Astrophysical Journal, 2023 This paper reports the estimated stellar parameters of 1153 Kepler red giant branch stars determined with asteroseismic modeling. We use radial-mode oscillation frequencies, gravity-mode period spacings, Gaia luminosities, and spectroscopic data to ...
Yingxiang Wang +4 more
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The Astronomical Journal, 2023 Given the recent successful launch of the James Webb Space Telescope, determining robust calibrations of the slopes and absolute magnitudes of the near- to mid-infrared tip of the red-giant branch (TRGB) will be essential to measuring precise ...
Barry F. Madore +2 more
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Dynamical Substructures of Galactic Globular Clusters II. NGC 6934 [PDF]
Journal of Astronomy and Space Sciences, 2004 The variations of the dynamical substructures of NGC 6934 have been investigated by means of performing point spread function stellar photometry and the surface photometry on BV CCD images of NGC 6934.
Jongwhan Rhee +3 more
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Calibration of the Tip of the Red Giant Branch
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 ...
Andrew J. Monson +9 more
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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 ...
Santi Cassisi +2 more
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The Near-IR TRGB Magnitude and Distance Modulus to NGC 185 [PDF]
Journal of Astronomy and Space Sciences, 2008 We determined values of distance modulus to nearby dwarf galaxy NGC 185 from the Tip of Red-Giant Branch (TRGB) method. Apparent magnitudes of the TRGB are estimated from the near-infrared JHK luminosity functions (LFs) of the resolved giant branch stars.
Y.-J. Sohn +7 more
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The Astronomical Journal, 2023 Wide-field and deep DECam multiband photometry, combined with HST data for the core of the Galactic globular cluster NGC 2808, allowed us to study the distribution of various stellar subpopulations and stars in different evolutionary phases out to the ...
Christian I. Johnson +9 more
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The analysis of isochrone fitting methods for red giant branch photometry, and tip red giant branch distance determination [PDF]
Monthly Notices of the Royal Astronomical Society, 2003 We consider the procedure of isochrone fitting and its application to the study of red giant branch (RGB) photometry in old stellar populations. This is extended to consider the problems introduced by the inclusion of lower-magnitude regions of the Colour Magnitude Diagram (CMD).
C. M. Frayn, Gerry Gilmore
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