Results 81 to 90 of about 5,382 (167)
The impact of large-scale, long-term optical surveys on pulsating star research
EPJ Web of Conferences, 2017 The era of large-scale photometric variability surveys began a quarter of a century ago, when three microlensing projects - EROS, MACHO, and OGLE - started their operation.
Soszyński Igor
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Discovery of RR Lyrae in the Ultra-faint-dwarf Galaxy Virgo III
The Astronomical JournalVirgo III is a newly discovered ultra-faint-dwarf (UFD) candidate, and finding RR Lyrae associated with this galaxy is important to constrain its distance.
Chow-Choong Ngeow, Anupam Bhardwaj
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The RR Lyrae variable stars in the globular cluster IC 4499
The Astronomical Journal, 1979 Periods and light curves are presented for 75 RR Lyrae variables in the globular cluster IC 4499. Of these, 52 are of the ab type with a mean period of 0.578 +- 0.009 and 23 are c type with a mean period of 0.351 +- 0.004. The cluster belongs to Oosterhoff group I (the short-period group) and has the greatest frequency of RR Lyrae variables of the ...
C. C. Clement +2 more
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On the central helium-burning variable stars of the LeoI dwarf spheroidal galaxy
, 2012 We present a study of short period, central helium-burning variable stars in the Local Group dwarf spheroidal galaxy LeoI, including 106 RR Lyrae stars and 51 Cepheids.
Bernard, E. J. +5 more
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The Dwarf Spheroidal Companions to M31: Variable Stars in Andromeda VI
, 2002 We have surveyed Andromeda VI, a dwarf spheroidal galaxy companion to M31, for variable stars using F450W and F555W observations obtained with the Hubble Space Telescope. A total of 118 variables were found, with 111 being RR Lyrae, 6 anomalous Cepheids,
Bailey S. I. +12 more
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RR Lyrae stars - A theoretical study of Bailey type C variables
The Astrophysical Journal, 1986 New theoretical models of stars pulsating in the first overtone have been constructed to simulate RR Lyr variables of Bailey type c. Despite the use of different opacities, these new models agree very well with earlier models built by Christy and Stellingwerf.
Olenka Hubickyj, Richard B. Stothers
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Classification for 969 Double-mode RR Lyrae Stars from Zwicky Transient Facility
The Astrophysical Journal Supplement SeriesRR Lyrae (RRL) variable stars are cornerstone distance indicators. In particular, double-mode RR Lyrae (RRd) stars enable period–luminosity relations (PLRs) that are less sensitive to metallicity, reducing systematic biases in distance measurements ...
Jianxing Zhang +4 more
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Period doubling and Blazhko modulation in BL Herculis hydrodynamic models
, 2012 We present the hydrodynamic BL Herculis-type models which display a long-term modulation of pulsation amplitudes and phases. The modulation is either strictly periodic or it is quasi-periodic, with the modulation period and modulation pattern varying ...
Moskalik, P., Smolec, R.
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Nonradial modes in RR Lyrae stars from the OGLE Collection of Variable Stars
, 2016 The Optical Gravitational Lensing Experiment (OGLE) is a great source of top-quality photometry of classical pulsators. Collection of variable stars from the fourth part of the project contains more than 38 000 RR Lyrae stars. These stars pulsate mostly in the radial fundamental mode (RRab), in radial first overtone (RRc) or in both modes ...
Netzel, Henryka +2 more
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Variable stars in the globular cluster M28 (NGC 6626)
, 2012 We present a new search for variable stars in the Galactic globular cluster M28 (NGC 6626). The search is based on a series of BVI images obtained with the SMARTS Consortium's 1.3m telescope at Cerro Tololo Inter-American Observatory, Chile.
Alonso-Garcia, J. +5 more
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