Results 41 to 50 of about 5,382 (167)

RR Lyrae stars with variable mean magnitudes

Astronomy & Astrophysics
Context. A number of RR Lyrae stars exhibit variable mean magnitudes in the OGLE survey light curves of the Galactic bulge. Hitherto, this phenomenon has not been studied, as it was generally assumed to be related to photometric issues. Aims.
Hajdu G., Jurcsik J., Catelan M., Pietrzyński G., Hocdé V., Soszyński I., Udalski A., Lee C.-U., Kim D.-J.   +8 more
doaj   +1 more source

Bulge RR Lyrae stars in the VVV tile $\textit{b201}$

, 2015
The VISTA Variables in the V\'ia L\'actea (VVV) Survey is one of the six ESO public surveys currently ongoing at the VISTA telescope on Cerro Paranal, Chile. VVV uses near-IR ($ZYJHK_{\rm s}$) filters that at present provide photometry to a depth of $K_{\
Catelan, M., Dékány, I., Gran, F., McDonald, I., Minniti, D., Navarrete, C., Ramos, R. Contreras, Saito, R. K.   +7 more
core   +1 more source

Variable Stars in the Unusual, Metal-Rich Globular Cluster NGC 6388 [PDF]

, 2001
We have undertaken a search for variable stars in the metal-rich globular cluster NGC 6388 using time-series BV photometry. Twenty-eight new variables were found in this survey, increasing the total number of variables found near NGC 6388 to ~57.
Alcaino G., Allen V. Sweigart, Barton J. Pritzl, Bingham E. A., Brocato E., Caloi V., Caputo F., Castellani V., Catelan M., Catelan M., Fusi Pecci F., Horace A. Smith, Jurcsik J., Jurcsik J., Jurcsik J., Kaluzny J., Kovacs G., Lloyd Evans T., Márcio Catelan, Petersen J. O., Reimers D.   +20 more
core   +3 more sources

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

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

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

RR Lyrae Mid-infrared Period–Luminosity–Metallicity and Period–Wesenheit–Metallicity Relations Based on Gaia DR3 Parallaxes

The Astrophysical Journal, 2023
We present new empirical infrared period–luminosity–metallicity (PLZ) and period–Wesenheit–metallicity (PWZ) relations for RR Lyae based on the latest Gaia Early Data Release 3 (EDR3) parallaxes.
Joseph P. Mullen, Massimo Marengo, Clara E. Martínez-Vázquez, Brian Chaboyer, Giuseppe Bono, Vittorio F. Braga, Massimo Dall’Ora, Valentina D’Orazi, Michele Fabrizio, Matteo Monelli, Frédéric Thévenin   +10 more
doaj   +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

Gaia Data Release 2: Validation of the classification of RR Lyrae and Cepheid variables with the Kepler and K2 missions [PDF]

, 1912
The second data release of the Gaia mission includes an advance catalog of variable stars. The classification of these stars are based on sparse photometry from the first 22 months of the mission.
Molnár, László, Plachy, Emese, Juhász, Áron L., Rimoldini, Lorenzo   +3 more
core   +2 more sources

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