Periods and classifications of RR Lyrae stars in the globular cluster M15
arXiv:2008.09778 · doi:10.1093/mnras/stab010
Abstract
We present measurements of the periods, amplitudes, and types of 74 RR Lyrae stars in the globular cluster M15 derived from Nickel 1 m telescope observations conducted at LickObservatory in 2019 and 2020. Of these RR Lyrae stars, two were previously reported but without a determination of the period. In addition, we identify five Type II Cepheid variable stars for which we report three novel period determinations, and a further 34 stars with uncertain classifications and periods. We discuss the development and subsequent application to our data of a new Python package, Period-determination and Identification Pipeline Suite(PIPS), based on a new adaptive free-form fitting technique to detect the periods of variable stars with a clear treatment of uncertainties.
21 pages. Accepted to MNRAS
References in corpus (12)
- SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
- Homogeneous Analysis of Globular Clusters from the APOGEE Survey with the BACCHUS Code. II. The Southern Clusters and Overview
- Gaia Data Release 1 - The Cepheid & RR Lyrae star pipeline and its application to the south ecliptic pole region
- Lick Observatory Supernova Search Follow-Up Program: Photometry Data Release of 93 Type Ia Supernovae
- MOST photometry of the RRd Lyrae variable AQ Leo: Two radial modes, 32 combination frequencies, and beyond
- Revisiting CoRoT RR Lyrae stars: detection of period doubling and temporal variation of additional frequencies
- The shortest modulation period Blazhko RR Lyrae star: SS Cnc
- Blazhko effect in the Galactic bulge fundamental mode RR~Lyrae stars I: Incidence rate and differences between modulated and non-modulated stars
- The Globular Cluster M15. I. Identification, Discovery, and Period Determination of Variable Stars
- Computation of the Fourier parameters of RR Lyrae stars by template fitting
- Period doubling and Blazhko modulation in BL Herculis hydrodynamic models
- The first Baade-Wesselink analysis of Blazhko RR Lyrae stars: discrepancies between photometrically and spectroscopically determined radius variations
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- On the Use of Field RR Lyrae as Galactic Probes. VI. Mixed mode RR Lyrae variables in Fornax and in nearby dwarf galaxies
- Hubble Space Telescope imaging of the extremely metal-poor globular cluster EXT8 in Messier 31
- TUVOpipe: a pipeline to search for UV transients with Swift-UVOT
- PIPS, an advanced platform for period detection in time series -- I. Fourier-likelihood periodogram and application to RR Lyrae Stars
- A Multiband Photometric Study of RR Lyrae Stars in M53 (NGC 5024)
- Optical and near-infrared pulsation properties of RR Lyrae and Population II Cepheid variables in the Messier 15 globular cluster