Results 51 to 60 of about 5,541 (198)

RR Lyrae Variable Stars in the CCD/Transit Instrument Survey

The Astronomical Journal, 1996
Abstract : RR Lyrae variable stars have long been recognized as important tools in probing the mass, chemical distribution and kinematics of the Galaxy from the inner recesses of the nuclear bulge to the outer environs of the distant Galactic halo. This dissertation chronicles an RR Lyrae variable star survey from a thorough description of the initial ...
Charles J. Wetterer, John T. McGraw, Thomas R. Hess, Randy Grashuis   +3 more
openaire   +1 more source

Photometric Metallicity and Distance Estimates for ∼136,000 RR Lyrae Stars from Gaia Data Release 3

The Astrophysical Journal, 2023
We present a sample of 135,873 RR Lyrae stars (RRLs) with precise photometric metallicity and distance estimates from our newly calibrated P – ϕ _31 – R _21 –[Fe/H]/ P – R _21 –[Fe/H] and G -band absolute magnitude–metallicity relations.
Xin-Yi Li, Yang Huang, Gao-Chao Liu, Timothy C. Beers, Hua-Wei Zhang   +4 more
doaj   +1 more source

RR Lyrae Stars In The GCVS Observed By The Qatar Exoplanet Survey [PDF]

, 2014
We used the light curve archive of the Qatar Exoplanet Survey (QES) to investigate the RR Lyrae variable stars listed in the General Catalogue of Variable Stars (GCVS).
Alsubai, K. A., Bramich, D. M., Cameron, A. Collier, Ferro, A. Arellano, Horne, K., Parley, N. R., Pollacco, D., West, R. G.   +7 more
core   +1 more source

HST Snaphot Study of Variable Stars in Globular Clusters: Inner Region of NGC 6441

, 2003
[Abridged] We present the results of a Hubble Space Telescope snapshot program to survey the inner region of the globular cluster NGC 6441 for its variable stars.
Allen V. Sweigart, Andrew C. Layden, Barton J. Pritzl, Bono G., Borissova J., Castellani V., Clement C. M., Demers S., Dickens R. J., Gingold R. A., Horace A. Smith, Kaluzny J., Kinman T. D., Kwee K. K., Lee S. W., Longmore A. J., Moehler S., Mrcio Catelan, Oosterhoff P. Th., Peter B. Stetson, Pike C. D., Pinto G., R. Michael Rich, Renzini A., Russeva T., Russeva T., Russeva T., Sweigart A. V., Wehlau A., Wehlau A.   +29 more
core   +1 more source

Variable Stars in the Cetus dSph Galaxy: Population Gradients and Connections with the Star Formation History [PDF]

, 2012
We investigate the variable star content of the isolated, Local Group, dwarf spheroidal galaxy (dSph) Cetus. Multi-epoch, wide-field images collected with the VLT/VIMOS camera allowed us to detect 638 variable stars (630 RR Lyrae stars and 8 Anomalous ...
A. Aparicio, Aparicio, Battaglia, Bellazzini, Bernard, Bernard, Bernard, Bono, Bono, C. Gallart, Cacciari, Cardelli, Casagrande, Cassisi, Castellani, Cignoni, Clement, Cole, Dall’Ora, Di Criscienzo, Di Criscienzo, Dolphin, E. D. Skillman, E. J. Bernard, Fiorentino, Fraternali, G. Bono, G. Fiorentino, Gallart, Gallart, Girardi, Gratton, Harbeck, Hidalgo, Hidalgo, Holtzman, Horne, I. Drozdovsky, Iben, Kunder, Lee, Lewis, M. Monelli, Marconi, McConnachie, Monelli, Monelli, Monelli, Monelli, Monelli, Noël, Noël, P. B. Stetson, S. Cassisi, Sandage, Soszyński, Soszyński, Stetson, Stetson, Stinson, Tolstoy, van den Bergh   +61 more
core   +1 more source

RADIATIVE TRANSFER EFFECTS ON THE COLORS OF RR LYRAE STARS

Odessa Astronomical Publications, 2017
The methods of Davis and Cox (1980), are applied to a series of models described by Bono and Stellingwerf  (1994) to deter-mine the colors of RR Lyrae stars.
C. G. Davis
doaj   +1 more source

Search for the Blazhko Effect in Field RR Lyrae Stars Using LINEAR and ZTF Light Curves

The Astronomical Journal
We analyzed the incidence and properties of RR Lyrae stars that show evidence for amplitude and phase modulation (the so-called Blazhko Effect) in a sample of ∼3000 stars with LINEAR and ZTF light curve data collected during the periods of 2002–2008 and ...
Ema Donev, Željko Ivezić
doaj   +1 more source

Wide-field variability survey of the globular cluster NGC 4833

, 2013
We present preliminary results of the variability survey in the field of the glo bular cluster NGC 4833. We observed all 34 variable stars known in the cluster.
Kopacki, Grzegorz
core   +1 more source

Search of Short-Period Pulsating Variables(I) [PDF]

Journal of Astronomy and Space Sciences, 1996
CCD differential photometry was carried out for seven stars in the "New Catalogue of Suspected Variable Stars" in order to discover new short-period pulsating variables such as low and high amplitude δ Scuti stars and RR Lyrae stars.
Chulhee Kim, Nam-Kyu Park
doaj  

Highlights on eclipsing binary variables from Araucaria Project

EPJ Web of Conferences, 2015
The Araucaria Project, which main goal is to provide precise determination of the cosmic distance scale, has recently made a set of discoveries involving variable stars in binary systems. Among these discoveries we highlight three: 1% precise measurement
Karczmarek Paulina, Pietrzyński Grzegorz, Gieren Wolfgang, Pilecki Bogumił, Graczyk Dariusz, Thompson Ian, Górski Marek, Konorski Piotr, Suchomska Ksenia, Nardetto Nicholas, Smolec Radoslaw   +10 more
doaj   +1 more source