Results 11 to 20 of about 20,344 (216)
Modelling the Galactic bar using OGLE-II Red Clump Giant Stars [PDF]
Monthly Notices of the Royal Astronomical Society, 2007 Red clump giant stars can be used as distance indicators to trace the mass distribution of the Galactic bar. We use RCG stars from 44 bulge fields from the OGLE-II microlensing collaboration database to constrain analytic tri-axial models for the ...
Mao, Shude +3 more
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The spectroscopic indistinguishability of red giant branch and red clump stars [PDF]
Astronomy & Astrophysics, 2016 Stellar spectroscopy provides useful information on the physical properties of stars such as effective temperature, metallicity and surface gravity (log g). However, those photospheric characteristics are often hampered by systematic uncertainties.
Hawkins, Keith, Masseron, Thomas
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Constraining the Galactic bar parameters with red clump giants [PDF]
Monthly Notices of the Royal Astronomical Society, 2002 We show that the small intrinsic spread in luminosities of red clump giants can be used to constrain the differences in the streaming motions of Galatic bulge stars on the near side and those on the far side. We propose two methods to select two samples with one preferentially on the near side and the other on the far side.
S. Mao, B. Paczynski
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Red giant clump in the Tycho-2 catalogue [PDF]
Astronomy Letters, 2008 The Tycho-2 proper motions and Tycho-2 and 2MASS photometry are used to select 97348 red giant clump (RGC) stars. The interstellar extinction and photometric distance are calculated for each of the stars. The selected stars are shown to form a selection-unbiased sample of RGC stars within about 350 pc of the Sun with the addition of more distant stars.
G. A. Gontcharov
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A new photometric model of the Galactic bar using red clump giants [PDF]
Monthly Notices of the Royal Astronomical Society, 2013 We present a study of the luminosity density distribution of the Galactic bar using number counts of red clump giants (RCGs) from the OGLE-III survey. The data were recently published by Nataf et al. (2013) for 9019 fields towards the bulge and have $2.94\times 10^6$ RC stars over a viewing area of $90.25 \,\textrm{deg}^2$.
Liang Cao +4 more
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Milky Way rotation curve from proper motions of red clump giants [PDF]
Astronomy & Astrophysics, 2014 We derive the stellar rotation curve of the Galaxy in the range of Galactocentric radii of R=4-16 kpc at different vertical heights from the Galactic plane of z between -2 and +2 kpc. We used the PPMXL survey, which contains the USNO-B1 proper motions catalog cross-correlated with the astrometry and near-infrared photometry of the 2MASS Point Source ...
M. López‐Corredoira
+6 more sources
Mean density inversions for red giants and red clump stars [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 Accepted for publication in ...
G. Buldgen +10 more
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On the Photometric Variability of Red Clump Giants [PDF]
Open Astronomy, 2001 Saul J. Adelman
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Theoretical Expectations for Clump Red Giants as Distance Indicators [PDF]
Highlights of Astronomy, 2002 AbstractVariations of ~ 0.4 mag are expected in the I-band absolute magnitude of red clump giants, , as a function of both stellar age and metallicity. This is the case regardless of some potential theoretical uncertainties. The quite large differences in mean ages and metallicities of clump stars among galaxies result in systematic changes (of up to ~
L. Girardi
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Proper motion dispersions of red clump giants in the galactic bulge: observations and model comparisons [PDF]
Monthly Notices of the Royal Astronomical Society, 2007 Red clump giants in the Galactic bulge are approximate standard candles and hence they can be used as distance indicators. We compute the proper motion dispersions of RCG stars in the Galactic bulge using the proper motion catalogue from the second phase of the Optical Gravitational Microlensing Experiment (OGLE-II, Sumi et al. 2004) for 45 fields. The
Nicholas J. Rattenbury +5 more
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