Results 11 to 20 of about 5,915 (202)
How rotation affects masses and ages of classical Cepheids
EPJ Web of Conferences, 2017 Classical Cepheid variable stars are both sensitive astrophysical laboratories and accurate cosmic distance tracers. We have recently investigated how the evolutionary effects of rotation impact the properties of these important stars and here provide an
Anderson Richard I. +4 more
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Bayesian Nonparametric Shrinkage Applied to Cepheid Star Oscillations. [PDF]
Stat Sci, 2012 Bayesian nonparametric regression with dependent wavelets has dual shrinkage properties: there is shrinkage through a dependent prior put on functional differences, and shrinkage through the setting of most of the wavelet coefficients to zero through ...
Berger J, Jefferys W, Müller P.
europepmc +2 more sources
A three-dimensional map of the Milky Way using classical Cepheid variable stars [PDF]
Science, 2019 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 Way.
Dorota M. Skowron +11 more
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Three classical Cepheid variable stars in the nuclear bulge of the Milky Way [PDF]
Nature, 2011 The nuclear bulge is a region with a radius of about 200 parsecs around the centre of the Milky Way. It contains stars with ages ranging from a few million years to over a billion years, yet its star-formation history and the triggering process for star formation remain to be resolved.
Matsunaga, N. +8 more
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The period-luminosity relation for Cepheid variable stars
The Astrophysical Journal, 1989 Flux-constant, hydrostatic model stellar atmospheres have been calculated using effective temperatures, gravities, and abundances appropriate for Cepheid variable stars. These models have been used to compute synthetic spectra, which have been used to compute synthetic colors and the visual surface brightness parameter S(v). The Johnson system color (V-
R. B. Hindsley, R. A. Bell
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NEW VARIABLE STARS AROUND THE CEPHEID VARIABLE TU CAS
Publications of The Korean Astronomical Society, 2005 Time-series observations were carried out using a 155mm refractor and a CCD camera at Bohyunsan Optical Astronomy Observatory. We found 38 new variable stars in the region around the Cepheid variable TU Cas: 22 eclipsing binary stars, 11 Scuti type stars and an RR Lyrae star, and 4 unclassified variables.
Young-Beom Jeon +3 more
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Radial Velocities of Cepheid Variable Stars in the Southern Hemisphere [PDF]
Monthly Notices of the Royal Astronomical Society, 1955 openaire +3 more sources
Radial Velocities of Cepheid Variable Stars
The Astrophysical Journal, 1937 openaire +3 more sources
Spectroscopic Determination of Radius Changes of Cepheid Variable Stars [PDF]
Publications of the Astronomical Society of the Pacific, 2007 We introduce a simple method for determining pulsation velocities of Cepheid variables; namely, the matching of observed spectral line profiles in both shape and absolute position with model profiles. This approach avoids the ambiguous meaning of radial velocity for asymmetric lines, and it avoids the awkward projection factor (the "p" factor) used to ...
David F. Gray, Kevin B. Stevenson
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Metallicities of Classical Cepheids in the Inner Galactic Disk
The Astrophysical Journal, 2023 Metallicity gradients refer to the sloped radial profiles of the metallicities of gas and stars and are commonly seen in disk galaxies. A well-defined metallicity gradient of the Galactic disk is observed particularly well with classical Cepheids, which ...
Noriyuki Matsunaga +16 more
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