Variable stars in Local Group Galaxies – I. Tracing the early chemical enrichment and radial gradients in the Sculptor dSph with RR Lyrae stars [PDF]
Monthly Notices of the Royal Astronomical Society, 2015 We identified and characterized the largest (536) RR Lyrae (RRL) sample in a Milky Way dSph satellite (Sculptor) based on optical photometry data collected over $\sim$24 years.
Matteo Monelli +2 more
exaly +4 more sources
RR Lyrae Stars and Anomalous Cepheids as Population Tracers in Local Group Galaxies
Universe, 2022 We discuss the use and importance of pulsating variable stars as population tracers in Local Group galaxies. Among bright variable crossing the classical instability strip, we mostly focus on RR Lyrae stars and Anomalous Cepheids.
Matteo Monelli, Giuliana Fiorentino
doaj +2 more sources
A HIGH-VELOCITY BULGE RR LYRAE VARIABLE ON A HALO-LIKE ORBIT [PDF]
, 2015 We report on the RR Lyrae variable star, MACHO 176.18833.411, located toward the Galactic bulge and observed within the data from the ongoing Bulge RR Lyrae Radial Velocity Assay, which has the unusual radial velocity of −372 ± 8 km s−1 and true space ...
Andrea Kunder +23 more
openalex +3 more sources
The Lack of RR Lyrae Variables in Ultrafaint Dwarf Galaxy Sextans II [PDF]
The Astronomical JournalRR Lyrae in ultrafaint dwarf (UFD) galaxies, if found, would be valuable to constrain the distances of these UFD. In this work, we report our search of RR Lyrae in a recently discovered UFD—Sextans II. Based on multiband (griz) time-series archival DECam
Chow-Choong Ngeow, Anupam Bhardwaj
doaj +2 more sources
FINDING, CHARACTERIZING, AND CLASSIFYING VARIABLE SOURCES IN MULTI-EPOCH SKY SURVEYS: QSOs AND RR LYRAE IN PS1 3π DATA [PDF]
, 2016 In area and depth, the Pan-STARRS1 (PS1) 3π survey is unique among many-epoch, multi-band surveys and has enormous potential for the all-sky identification of variable sources.
Nina Hernitschek +16 more
openalex +3 more sources
CONSTRAINTS ON THE DISTANCE MODULI, HELIUM AND METAL ABUNDANCES, AND AGES OF GLOBULAR CLUSTERS FROM THEIR RR LYRAE AND NON-VARIABLE HORIZONTAL-BRANCH STARS. I. M3, M15, AND M92 [PDF]
, 2016 Up-to-date isochrones, zero-age horizontal-branch (ZAHB) loci, and evolutionary tracks for core He-burning stars are applied to the color–magnitude diagrams of M3, M15, and M92, focusing in particular on their RR Lyrae populations.
Don A. VandenBerg +2 more
openalex +3 more sources
The Mode Change of the RR Lyrae Variable V79 in M3 [PDF]
, 1999 Christine M. Clement, V. P. Goranskij
openalex +2 more sources
The Changing Lightcurve of the Double-mode RR Lyrae Variable Star V338 Boo [PDF]
Astrophysical Journal Letters, 2021 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
K. Carrell +5 more
semanticscholar +1 more source
Identifying RR Lyrae Variable Stars in Six Years of the Dark Energy Survey [PDF]
Astrophysical Journal, 2020 We present a search for RR Lyrae stars using the full six-year data set from the Dark Energy Survey covering ∼5000 deg2 of the southern sky. Using a multistage multivariate classification and light-curve template-fitting scheme, we identify RR Lyrae ...
K. Stringer +68 more
semanticscholar +1 more source
The properties of RR Lyrae variable stars in the Local Group dwarf galaxy LGS-3
Monthly notices of the Royal Astronomical Society, 2023 We present a sample of 56 RR Lyrae variable stars (48 ab-type and 8 c-type) measured from a set of F475W (≈B filter) and F814W (≈I filter) archival images taken with the Hubble Space Telescope/Advanced Camera for Surveys of one field in the Local Group
A. Sarajedini
semanticscholar +1 more source