High-cadence stellar variability studies of RR Lyrae stars with DECam: New multi-band templates
arXiv:2501.03813 · doi:10.1051/0004-6361/202453129
Abstract
We present the most extensive set to date of high-quality RR Lyrae light curve templates in the griz bands, based on time-series observations of the Dark Energy Camera Plane Survey (DECaPS) East field, located in the Galactic bulge at coordinates (RA, DEC)(J2000) = (18:03:34, -29:32:02), obtained with the Dark Energy Camera (DECam) on the 4-m Blanco telescope at the Cerro Tololo Inter-American Observatory (CTIO). Our templates, which cover both fundamental-mode (RRab) and first-overtone (RRc) pulsators, can be especially useful when there is insufficient data for accurately calculating the average magnitudes and colors, hence distances, as well as to inform multi-band light curve classifiers, as will be required in the case of the Vera C. Rubin Observatory's Legacy Survey of Space and Time (LSST). In this paper, we describe in detail the procedures that were adopted in producing these templates, including a novel approach to account for the presence of outliers in photometry. Our final sample comprises 136 RRab and 144 RRc templates, all of which are publicly available. Lastly, in this paper we study the inferred Fourier parameters and other light curve descriptors, including rise time,skewness, and kurtosis, as well as their correlations with the pulsation mode, period, and effective wavelength.
arXiv comment19 pages, 17 figures and 4 tables
References in corpus (46)
- Astropy: A Community Python Package for Astronomy
- The Sloan Digital Sky Survey: Technical Summary
- Binary companions of evolved stars in APOGEE DR14: Search method and catalog of ~5,000 companions
- The Eleventh and Twelfth Data Releases of the Sloan Digital Sky Survey: Final Data from SDSS-III
- The Pan-STARRS1 Photometric System
- Variable Stars in Galactic Globular Clusters
- OGLE 2003-BLG-235/MOA 2003-BLG-53: A planetary microlensing event
- Cosmological Constraints from Measurements of Type Ia Supernovae discovered during the first 1.5 years of the Pan-STARRS1 Survey
- Horizontal Branch Stars: The Interplay between Observations and Theory, and Insights into the Formation of the Galaxy
- The ESSENCE Supernova Survey: Survey Optimization, Observations, and Supernova Photometry
- Light Curve Templates and Galactic Distribution of RR Lyrae Stars from Sloan Digital Sky Survey Stripe 82
- On a new theoretical framework for RR Lyrae stars I: the metallicity dependence
- Testing LMC Microlensing Scenarios: The Discrimination Power of the SuperMACHO Microlensing Survey
- A multi-color and Fourier study of RR Lyrae variables in the globular cluster NGC 5272 (M3)
- Machine-Learned Identification of RR Lyrae Stars from Sparse, Multi-band Data: the PS1 Sample
- The DECam Plane Survey: Optical photometry of two billion objects in the southern Galactic plane
- Alert Classification for the ALeRCE Broker System: The Light Curve Classifier
- Uncloaking globular clusters in the inner Galaxy
- On the distance of the globular cluster M4 (NGC 6121) using RR Lyrae stars: I. optical and near-infrared Period-Luminosity and Period-Wesenheit relations
- Evidence for Distinct Components of the Galactic Stellar Halo from 838 RR Lyrae Stars Discovered in the LONEOS-I Survey
- Light curve analysis of Variable stars using Fourier decomposition and Principal component analysis
- Fourier decomposition and frequency analysis of the pulsating stars with P < 1day in the OGLE database. II. Multiperiodic RR Lyrae variables in the Galactic Bulge
- The Evolutionary Status of M3 RR Lyrae Variables: Breakdown of the Canonical Framework?
- The age of the Milky Way inner stellar spheroid from RR Lyrae population synthesis
- The Metallicity Dependence of the Fourier Components of RR Lyrae Light Curves is the Oosterhoff/Arp/Preston Period Ratio Effect in Disguise
- A DECam Search for an Optical Counterpart to the LIGO Gravitational Wave Event GW151226
- KIC 11285625: a double-lined spectroscopic binary with a gamma Dor pulsator discovered from Kepler space photometry
- A Catalogue of RR Lyrae Stars from the Northern Sky Variability Survey
- Metallicity of Galactic RR Lyrae from Optical and Infrared Light Curves: I. Period-Fourier-Metallicity Relations for Fundamental Mode RR Lyrae
- A Search for RR Lyrae Stars in Segue 2 and Segue 3
- Blazhko effect in the Galactic bulge fundamental mode RR~Lyrae stars I: Incidence rate and differences between modulated and non-modulated stars
- Mapping the Interstellar Reddening and Extinction towards Baade's Window Using Minimum Light Colors of ab-type RR Lyrae Stars. Revelations from the De-reddened Color-Magnitude Diagrams
- New Near-Infrared light-curve templates for RR Lyrae variables
- TESS Data for Asteroseismology (T'DA) Stellar Variability Classification Pipeline: Set-Up and Application to the Kepler Q9 Data
- Predicted and empirical radii of RR Lyrae stars
- Absolute Magnitudes and Colors of RR Lyrae stars in DECam Passbands from Photometry of the Globular Cluster M5
- Cepheid investigations using the Kepler space telescope
- Persistent and occasional: searching for the variable population of the ZTF/4MOST sky using ZTF data release 11
- Metallicity of Galactic RR Lyrae from Optical and Infrared Light Curves: II. Period-Fourier-Metallicity Relations for First Overtone RR Lyrae
- Rubin Observatory LSST Stars Milky Way and Local Volume Star Clusters Roadmap
- Deep Drilling in the Time Domain with DECam: Survey Characterization
- Period-Color and Amplitude-Color Relations at Maximum and Minimum Light for RR Lyrae Stars in the SDSS Stripe 82 Region
- Humps and bumps: The effects of shocks on the optical light curves of fundamental-mode RR Lyrae stars
- RR Lyrae stars as probes of the outer Galactic halo: Chemical and kinematic analysis of a pilot sample
- Preliminary Analysis of ULPC Light Curves Using Fourier Decomposition Technique
- A Study of Pulsation properties of 57 Non-Blazhko effect ab-type RR Lyrae stars with homogeneous metallicities from the LAMOST-Kepler/K2 survey