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A Red Giants’ Toy Story. II. Understanding the Red-giant Branch Bump
The Astrophysical Journal, 2023 The Red-Giant Branch Bump (RGBB) is one of the most noteworthy features in the red-giant luminosity function of stellar clusters. It is caused by the passage of the hydrogen-burning shell through the composition discontinuity left at the point of the ...
Marcelo M. Miller Bertolami
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Red variables in the OGLE-II data base - I. Pulsations and period-luminosity relations below the tip of the red giant branch of the Large Magellanic Cloud [PDF]
, 2003 We present period-luminosity relations for more than 23,000 red giants in the Large Magellanic Cloud observed by the OGLE-II microlensing project. The OGLE period values were combined with the 2MASS single-epoch JHK photometric data.
L. L. Kiss, T. R. Bedding
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The red giant branch tip and bump of the Leo II dwarf spheroidal galaxy [PDF]
, 2005 We present V and I photometry of a 9.4' X 9.4' field centered on the dwarf spheroidal galaxy Leo II. The Tip of the Red Giant Branch is identified at I^{TRGB}=17.83 +/- 0.03 and adopting = -1.53 +/- 0.2 from the comparison of RGB stars with Galactic ...
M. Bellazzini +2 more
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Inferring Coupling Strengths of Mixed-mode Oscillations in Red Giant Stars Using Deep Learning
The Astrophysical Journal, 2023 Asteroseismology is a powerful tool that may be applied to shed light on stellar interiors and stellar evolution. Mixed modes, behaving like acoustic waves in the envelope and buoyancy modes in the core, are remarkable because they allow for probing the ...
Siddharth Dhanpal +5 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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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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Metallicities of Globular Clusters m3 and m5 from VI CCD Photometry [PDF]
Journal of Astronomy and Space Sciences, 2000 To derive the metallicities of M3 and M5, we used the shape of red giant branch, horizontal branch magnitude, and red giant branch bump on the (V - I) - V color magnitude diagrams.
Young-Jong Sohn, Hyun-Chul Lee
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