Results 1 to 10 of about 399 (192)

ULTRA-LOW AMPLITUDE VARIABLES IN THE LARGE MAGELLANIC CLOUD—CLASSICAL CEPHEIDS, POP. II CEPHEIDS, RV TAU STARS, AND BINARY VARIABLES [PDF]

open access: bronzeThe Astrophysical Journal, 2009
A search for variable stars with ultra-low amplitudes (ULAs), in the millimagnitude range, has been made in the combined MACHO and OGLE databases in the broad vicinity of the Cepheid instability strip in the HR diagram. A total of 25 singly periodic and 4 multiply periodic ULA objects have been uncovered.
J. Robert Buchler   +2 more
openalex   +4 more sources

Variable Stars in M13. III. The Cepheid Variables and their Relation to Evolutionary Changes in Metal-poor BL Her Stars [PDF]

open access: greenActa Astronomica, 2019
New CCD photometry has been combined with published and unpublished earlier observations to study the three Cepheid variables in M13: V1, V2 and V6. The light curve characteristics in $B$, $V$ and $I_{\rm C}$ have been determined and the periods updated.
W. Osborn   +5 more
openalex   +3 more sources

The OGLE Collection of Variable Stars. Anomalous Cepheids in the\n Magellanic Clouds [PDF]

open access: green, 2015
18 pages, 9 figures, submitted to Acta ...
I. Soszyński   +12 more
  +5 more sources

First detection of CO emission from Cepheid Variable stars [PDF]

open access: green, 2023
We present IRAM 30~m Telescope observations of the CO(1-0) and CO(2-1) emission lines in a sample of eight Cepheid variable stars. The CO(1-0) line is detected in four of the eight targets at a signal-to-noise of $>$3.5 confirming the presence of CO in Cepheid atmospheres.
S. L. Hamer, Steve Ardern, V. Scowcroft
openalex   +3 more sources

Convection in the interior of Cepheid variable stars

open access: green
Visualization of vorticity magnitude of a 8 solar mass Cepheid variable star. This 2D simulation in a spherical shell has been performed with the MUltidimensional Stellar Implicit Code (MUSIC). The zero point in vorticity is in white.This poster won a Gallery of Fluid motion award at the APS/DFD 2025 conference.This work was performed under the ...
Stuck, Maxime, Pratt, Jane
  +4 more sources

The OGLE Collection of Variable Stars. Classical Cepheids in the\n Magellanic System [PDF]

open access: green, 2016
16 pages, 5 ...
I. Soszyński   +12 more
  +5 more sources

Cepheids and other variable stars and the distance to the Galactic Centre [PDF]

open access: bronzeProceedings of the International Astronomical Union, 2012
AbstractWe review and discuss results of our survey of variable stars towards the Galactic Centre and their distances. In our near-infrared monitoring survey using IRSF/SIRIUS, we detected a number of Miras and Cepheids (both classical and type II) within 20 arcmin of the Galactic Centre.
Noriyuki Matsunaga
openalex   +2 more sources

A three-dimensional map of the Milky Way using classical Cepheid variable stars [PDF]

open access: greenScience, 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
openalex   +5 more sources

Period Changes of Mira Variables, RR Lyrae Stars, and Type II Cepheids [PDF]

open access: green, 2013
Mira variables, RR Lyrae variables, and type II Cepheids all represent evolved states of low-mass stars, and long term observations have revealed that changes in pulsation period occur for each of these classes of variable. Most Mira variables show small or no period changes, but a few show large period changes that can plausibly be associated with ...
H. A. Smith
openalex   +3 more sources

Variable Stars in Leo A: RR Lyrae Stars, Short-Period Cepheids, and Implications for Stellar Content [PDF]

open access: bronzeThe Astronomical Journal, 2002
46 pages, 12 figures Accepted by ...
Andrew E. Dolphin   +8 more
openalex   +4 more sources

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