Results 21 to 30 of about 2,679,498 (179)
RR Lyrae Variables in the Crater II Dwarf Galaxy [PDF]
The Astrophysical Journal, 2018 Abstract We report the detection of RR Lyrae variable stars in Crater II, a recently discovered large and diffuse satellite dwarf galaxy of the Milky Way (MW). Based on B, V time-series photometry obtained with the Korea Microlensing Telescope Network 1.6 m telescope at Cerro Tololo Inter-American Observatory, we identified 83 ab-type ...
Seok-Joo Joo +12 more
openaire +3 more sources
Physical parameters of three field RR Lyrae stars [PDF]
, 2014 This work was partially supported by DGAPA–Universidad Nacional Autonoma de Mexico through project IN104612.Stromgren uvby - beta photometry of the stars classified as RR Lyrae stars RU Piscium, SS Piscium and TU Ursae Majoris has been used to estimate ...
Jaimes, R. Figuera +2 more
core +2 more sources
RR Lyrae Variable Stars: Pulsational Constraints Relevant to the Oosterhoff Controversy [PDF]
The Astrophysical Journal, 1995 postscript file of 7 pages and 2 figures; one non postcript figure is available upon request; for any problem please write to marcella@astr1pi.difi.unipi ...
Bono, G. +3 more
openaire +2 more sources
, 2017 Observations by Kepler/K2 have revolutionized the study of RR Lyrae stars by allowing the detection of new phenomna, such as low amplitude additional modes and period doubling, which had not previously been seen from the ground.
Pawel Moskalik +2 more
core +2 more sources
A catalogue of RR Lyrae stars from the Northern Sky Variability Survey [PDF]
Monthly Notices of the Royal Astronomical Society, 2006 Abstract A search for RR Lyrae stars has been conducted in the publicly available data of the Northern Sky Variability Survey. Candidates have been selected by the statistical properties of their variation; the standard deviation, skewness and kurtosis with appropriate limits determined from a sample 314 known RRab and RRc stars listed ...
Wils, Patrick +2 more
openaire +2 more sources
RR Lyrae Variables in the Globular Cluster M55. The First Evidence for Nonradial Pulsations in RR Lyr Stars [PDF]
International Astronomical Union Colloquium, 1999 AbstractWe present the results of a photometric study of RR Lyrae variables in the field of the globular cluster M55. We have discovered nine new RR Lyrae stars, increasing the number of known variables in this cluster to 15 objects. Five of the newly discovered variables belong to Bailey type RRc and two to type RRab.
Olech, A. +5 more
openaire +2 more sources
The Changing Lightcurve of the Double-mode RR Lyrae Variable Star V338 Boo [PDF]
The Astrophysical Journal Letters, 2021 Abstract We present an analysis of the lightcurve extracted from Transiting Exoplanet Survey Satellite (TESS) Full Frame Images (FFIs) of the double-mode RR Lyrae V338 Boo. We find that the fundamental mode pulsation is changing in amplitude across the 54 days of observations.
Kenneth Carrell +5 more
openaire +2 more sources
Study of the Blazhko Type RRc stars in the Stripe 82 Region Using SDSS and ZTF
The Astronomical Journal, 2023 RR Lyrae stars (RRLs) are pulsating stars, many of which also show a long-term variation called the Blazhko effect which is a modulation of amplitude and phase of the lightcurve.
Vaidehi Varma +2 more
doaj +1 more source
On the RR Lyrae Stars in Globulars. V. The Complete Near-infrared (JHKs) Census of ω Centauri RR Lyrae Variables* [PDF]
The Astronomical Journal, 2018 Abstract We present a new complete near-infrared (NIR, JHK s ) census of RR Lyrae stars (RRLs) in the globular ω Cen (NGC 5139). We collected 15,472 JHK s images with 4–8 m class telescopes over 15 years (2000–2015 ...
V. F. Braga +37 more
openaire +6 more sources
THE CHEMICAL COMPOSITIONS OF RR LYRAE TYPE C VARIABLE STARS [PDF]
The Astrophysical Journal, 2014 We present a detailed chemical abundance study of eight RR Lyrae variable stars of subclass c (RRc). The target RRc stars chosen for study exhibit "Blazhko-effect" period and amplitude modulations to their pulsational cycles. Data for this study were gathered with the echelle spectrograph of the 100 inch du Pont telescope at Las Campanas Observatory ...
Govea, Jose +3 more
openaire +2 more sources