Near-Infrared Observations of RR Lyrae variables in Galactic Globular Clusters: I. The case of M92

Abstract

We present near-infrared J,H, and K-band time series observations of the Galactic Globular Cluster (GGC) M92. On the basis of these data, we derived well-sampled light curves for eleven out of the seventeen cluster RR Lyrae variables, and in turn, accurate mean near-infrared (NIR) magnitudes. The comparison between predicted and empirical slopes of NIR Period-Luminosity (PL) relations indicates a very good agreement. Cluster distance determinations based on independent theoretical NIR $PL$ relations present uncertainties smaller than 5% and agree quite well with recent distance estimates based on different distance indicators. We also obtained accurate and deep NIR color-magnitude diagrams (CMDs) ranging from the tip of the Red Giant Branch (RGB) down to the Main Sequence Turn-Off. We detected the RGB bump and the NIR luminosities of this evolutionary feature are, within theoretical and empirical uncertainties, in good agreement with each other.

30 pages, 8 figures, accepted for pubblication on AJ

References in corpus (36)

• A large stellar evolution database for population synthesis studies. I. Scaled solar models and isochrones
• Variable Stars in Galactic Globular Clusters
• Distances, ages, and epoch of formation of globular clusters
• Ages of Globular Clusters from Hipparcos Parallaxes of Local Subdwarfs
• The RR Lyrae Period-Luminosity Relation. I. Theoretical Calibration
• Homogeneous age dating of 55 Galactic globular clusters. Clues to the Galaxy formation mechanisms
• Galactic Globular Cluster Relative Ages
• Younger and brighter - New distances to globular clusters based on Hipparcos parallax measurements of local subdwarfs
• A new IR-Array photometric survey of Galactic Globular Clusters: A detailed study of the RGB sequence as a step towards the global testing of stellar models
• A pulsational approach to near infrared and visual magnitudes of RR Lyrae stars
• A critical investigation on the discrepancy between the observational and theoretical Red Giant luminosity function "Bump"
• The calibration of the RGB Tip as a Standard Candle: Extension to Near Infrared colors and higher metallicity
• Theoretical Models for Classical Cepheids: II. Period-Luminosity, Period-Color and Period-Luminosity-Color Relations
• Blue Straggler Stars: The Spectacular Population in M80
• Un updated theoretical scenario for globular cluster stars
• Nonlinear Investigation of the Pulsational Properties of RR Lyrae Variables
• The Red Giant Branch in the Near-Infrared Colour-Magnitude Diagrams. I: The calibration of photometric indices
• Globular Cluster Distances from RR Lyrae Stars
• Comparison between predicted and empirical DV(Bump -HB) in Galactic Globular Clusters
• Theoretical insights into the RR Lyrae K-band Period-Luminosity relation
• The Red Giant Branch in Near-Infrared Colour-Magnitude Diagrams. II: The luminosity of the Bump and the Tip
• Metal Rich RR Lyrae Variables: II. The Pulsational Scenario
• Pulsational M_V versus [Fe/H] relation(s) for globular cluster RR Lyrae variables
• A Comparison of Deep HST Luminosity Functions of Four Globular Clusters
• The Metallicity Dependence of RR Lyrae Absolute Magnitudes from Synthetic Horizontal-Branch Models
• The distance to the LMC cluster Reticulum from the K-band Period-Luminosity-Metallicity relation of RR Lyrae stars
• RR Lyrae variables in Galactic globular clusters: IV. Synthetic HB and RR Lyrae predictions
• Properties of RR Lyrae stars in the Inner Regions of the Large Magellanic Cloud
• Wide field CCD photometry of the globular cluster M92
• High Angular Resolution JHK Imaging of the Centers of the Metal-Poor Globular Clusters NGC5272 (M3), NGC6205 (M13), NGC6287, and NGC6341 (M92)
• Distances to Local Group Galaxies
• TNG Near-IR Photometry of five Galactic Globular Clusters
• RR Lyrae Distance Scale: Theory and Observations
• On the pulsation parallax of the variable star RR Lyr
• The RR Lyrae Star Period - K-band Luminosity Relation of the Globular Cluster M3
• The distance to IC4499 from K-band photometry of 32 RR Lyrae stars

Cited by in corpus (28)

• A large stellar evolution database for population synthesis studies. II. Stellar models and isochrones for an alpha-enhanced metal distribution
• Accurate distances to Galactic globular clusters through a combination of Gaia EDR3, HST and literature data
• The Quenching of the Ultra-Faint Dwarf Galaxies in the Reionization Era
• Distance Scale Zero-Points from Galactic RR Lyrae Star Parallaxes
• Revised bolometric corrections and interstellar extinction coefficients for the ACS and WFPC2 photometric systems
• The Primeval Populations of the Ultra-Faint Dwarf Galaxies
• 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
• The period-luminosity relation for type II Cepheids in globular clusters
• Old-Aged Stellar Population Distance Indicators
• A pulsational distance to Omega Centauri based on Near-Infrared Period-Luminosity relations of RR Lyrae stars
• The infrared JHK light curves of RR Lyr
• Distance to Galactic globulars using the near-infrared magnitudes of RR Lyrae stars: IV. The case of M5 (NGC5904)
• 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
• Eridanus II: A Fossil from Reionization with an Off-Center Star Cluster
• High-precision distance measurements with classical pulsating stars
• Synthetic properties of bright metal-poor variables. II. BL Her stars
• Galactic Bulge Population II Cepheids in the VVV Survey: Period-Luminosity Relations and a Distance to the Galactic Center
• The VVV Templates Project. Towards an Automated Classification of VVV Light-Curves. I. Building a database of stellar variability in the near-infrared
• Timing the r-Process Enrichment of the Ultra-Faint Dwarf Galaxy Reticulum II
• Bulge RR Lyrae stars in the VVV tile $\text{b201}$
• Constraints on the Distance Moduli, Helium and Metal Abundances, and Ages of Globular Clusters From Their RR Lyrae and Non-Variable Horizontal-Branch Stars. III. M55 and NGC 6362
• Signatures of Tidal Disruption in Ultra-Faint Dwarf Galaxies: A Combined HST, Gaia, and MMT/Hectochelle Study of Leo V
• Precise Empirical Determination of Metallicity Dependence of Near-infrared Period-Luminosity Relations for RR Lyrae Variables
• The Swift/UVOT Stars Survey. II. RR Lyrae Stars in M 3 and M 15
• The Elusive Distance Gradient in the Ultra-Faint Dwarf Galaxy Hercules: A Combined Hubble Space Telescope and Gaia View
• Identifying Contaminated K-band Globular Cluster RR Lyrae Photometry
• The VMC Survey -- LIV. Anomalous Cepheids in the Magellanic Clouds Period-Luminosity relations in the near-infrared bands
• Optical and near-infrared pulsation properties of RR Lyrae and Population II Cepheid variables in the Messier 15 globular cluster