Distances to galaxies from the brightest stars in the Universe [PDF]
Astrophysics and Space Science, 2012 Review paper to appear in "The Fundamental Cosmic Distance Scale: State of the Art and GAIA Perspective" 2012, Astrophysics and Space Science, special issue, eds.: E. Brocato, G. Clementini, M. Marconi. (12 pages, 14 figures)
Kudritzki, R., Urbaneja, M.
openaire +3 more sources
IDENTIFYING THE YOUNG LOW-MASS STARS WITHIN 25 pc. II. DISTANCES, KINEMATICS, AND GROUP MEMBERSHIP [PDF]
, 2012 We have conducted a kinematic study of 165 young M dwarfs with ages of ≲300 Myr. Our sample is composed of stars and brown dwarfs with spectral types ranging from K7 to L0, detected by ROSAT and with photometric distances of ≲25 pc assuming that the ...
E. Shkolnik +7 more
semanticscholar +1 more source
Simultaneous calibration of spectro-photometric distances and the Gaia DR2 parallax zero-point offset with deep learning [PDF]
Monthly notices of the Royal Astronomical Society, 2019 Gaia measures the five astrometric parameters for stars in the Milky Way, but only four of them (positions and proper motion, but not distance) are well measured beyond a few kpc from the Sun.
Henry W. Leung, J. Bovy
semanticscholar +1 more source
VERIFYING ASTEROSEISMICALLY DETERMINED PARAMETERS OF KEPLER STARS USING HIPPARCOS PARALLAXES: SELF-CONSISTENT STELLAR PROPERTIES AND DISTANCES [PDF]
, 2012 Accurately determining the properties of stars is of prime importance for characterizing stellar populations in our Galaxy. The field of asteroseismology has been thought to be particularly successful in such an endeavor for stars in different ...
V. S. Aguirre +37 more
semanticscholar +1 more source
Bayesian analysis of ages, masses and distances to cool stars with non-LTE spectroscopic parameters [PDF]
, 2012 For studies of Galactic evolution, the accurate characterization of stars in terms of their evolutionary stage and population membership is of fundamental importance. A standard approach relies on extracting this information from stellar evolution models
A. Serenelli +7 more
semanticscholar +1 more source
Gaia DR2 study of Herbig Ae/Be stars [PDF]
Astronomy & Astrophysics, 2018 Aims. We use Gaia Data Release 2 (DR2) to place 252 Herbig Ae/Be stars in the Hertzsprung–Russell diagram and investigate their characteristics and properties. Methods.
M. Vioque +4 more
semanticscholar +1 more source
A three-dimensional map of the Milky Way using classical Cepheid variable stars [PDF]
Science, 2018 Cepheids help to map the Galaxy Cepheid variable stars pulsate, which allows their distances to be determined from the periodic variations in brightness. Skowron et al. constructed a catalog of thousands of Cepheids covering a large fraction of the Milky
D. Skowron +11 more
semanticscholar +1 more source
Asteroseismology and Gaia: Testing Scaling Relations Using 2200 Kepler Stars with TGAS Parallaxes [PDF]
, 2017 We present a comparison of parallaxes and radii from asteroseismology and Gaia DR1 (TGAS) for 2200 Kepler stars spanning from the main sequence to the red-giant branch.
D. Huber +19 more
semanticscholar +1 more source
The Galactic WN stars revisited [PDF]
Astronomy & Astrophysics, 2019 Comprehensive spectral analyses of the Galactic Wolf-Rayet stars of the nitrogen sequence (i.e. the WN subclass) have been performed in a previous paper. However, the distances of these objects were poorly known.
W. Hamann +8 more
semanticscholar +1 more source