Results 11 to 20 of about 399 (192)
The evolution of the Galactic nuclear bulge traced by Cepheid variable stars [PDF]
Journal of Physics: Conference Series, 2012 The Galactic nuclear bulge hosts significant populations of young stars, within a few hundred parsecs around the Galactic Centre, unlike the more extended bulge. Recently, we discovered classical Cepheid variable stars (hereinafter Cepheids) in the Galactic nuclear bulge.
Noriyuki Matsunaga
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Eros variable stars: A catalog of Cepheids in the Magellanic Clouds [PDF]
, 1999 We present a catalog containing 290 LMC and 590 SMC Cepheids which have been obtained using the two 4k $\times$ 8k CCD cameras of the EROS~2 microlensing survey. The Cepheids were selected from 1,134,000 and 504,000 stars in the central regions of the LMC and SMC respectively, that were monitored over 150 nights between October 1996 and February 1997 ...
C. Afonso
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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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On the Differential Galactic Rotation of the System of Cepheid Variable Stars [PDF]
Monthly Notices of the Royal Astronomical Society, 1956 D. W. N. Stibbs
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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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M33 Cepheids from CFHT/MegaCam Survey
The Astronomical Journal, 2022 In this paper we analyze Sloan g, r, i archival imaging data of M33 taken by Hartman et al. using MegaCam at the Canada–France–Hawaii Telescope. To determine the distance to the M33 galaxy, we performed several analytical steps to identify its Cepheid ...
Samuel Adair, Chien-Hsiu Lee
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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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The MACHO Project LMC Variable Star Inventory: Classical Cepheids, AGB Variables, and the Nine Million Star Color-Magnitude Diagram [PDF]
Symposium - International Astronomical Union, 1999 We measure the ratio of ~ 5M⊙ blue and red LMC supergiants (representative of classical Cepheids) using the MACHO Project's 9 million star color-magnitude diagram (9M CMD) of the LMC bar. We find b/r = 0.39, which favors the Z=0.008, 5M⊙ theoretical model of Schaerer et al. (1993) over that of Fagatto et al. (1994).
Alves, DR, Basu, A, Cook, KH, Welch, DL
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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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