The Carnegie RR Lyrae Program: Mid-infrared Period-Luminosity relations of RR Lyrae stars in Reticulum

Abstract

We analysed 30 RR Lyrae stars (RRLs) located in the Large Magellanic Cloud (LMC) globular cluster Reticulum that were observed in the 3.6 and 4.5 $\mu$m passbands with the Infrared Array Camera (IRAC) on board of the Spitzer Space Telescope. We derived new mid-infrared (MIR) period-luminosity PL relations. The zero points of the PL relations were estimated using the trigonometric parallaxes of five bright Milky Way (MW) RRLs measured with the Hubble Space Telescope (HST) and, as an alternative, we used the trigonometric parallaxes published in the first Gaia data release (DR1) which were obtained as part of the Tycho-Gaia Astrometric Solution (TGAS) and the parallaxes of the same stars released with the second Gaia data release (DR2). We determined the distance to Reticulum using our new MIR PL relations and found that distances calibrated on the TGAS and DR2 parallaxes are in a good agreement and, generally, smaller than distances based on the HST parallaxes, although they are still consistent within the respective errors. We conclude that Reticulum is located ~3 kpc closer to us than the barycentre of the LMC.

17 pages, 10 figures. Accepted for publication in MNRAS

References in corpus (20)

• Gaia Data Release 2. Summary of the contents and survey properties
• The Gaia mission
• Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
• Gaia Data Release 2: The astrometric solution
• Gaia Data Release 2: using Gaia parallaxes
• An eclipsing binary distance to the Large Magellanic Cloud accurate to 2 per cent
• Gaia Data Release 1: Astrometry - one billion positions, two million proper motions and parallaxes
• Milky Way Cepheid Standards for Measuring Cosmic Distances and Application to Gaia DR2: Implications for the Hubble Constant
• Gaia Data Release 1: Catalogue validation
• Evidence for a systematic offset of -80 micro-arcseconds in the Gaia DR2 parallaxes
• Clustering of Local Group distances: publication bias or correlated measurements? I. The Large Magellanic Cloud
• RR Lyrae stars as standard candles in the Gaia Data Release 2 Era
• 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
• Standard Galactic Field RR Lyrae. I. Optical to Mid-infrared Phased Photometry
• New near-infrared period-luminosity-metallicity relations for RR Lyrae stars and the outlook for Gaia
• The $>100$ kpc Distant Spur of the Sagittarius Stream and the Outer Virgo Overdensity, as Seen in PS1 RR Lyrae Stars
• Gaia Data Release 2: Summary of the variability processing & analysis results
• The infrared JHK light curves of RR Lyr
• On the RR Lyrae stars in globulars: V. the complete Near-Infrared (JHKs) census of omega Centauri RR Lyrae variables
• SMHASH: Anatomy of the Orphan Stream using RR Lyrae stars

Cited by in corpus (16)

• Modules for Experiments in Stellar Astrophysics (MESA): Pulsating Variable Stars, Rotation, Convective Boundaries, and Energy Conservation
• RR Lyrae stars as standard candles in the Gaia Data Release 2 Era
• Old-Aged Stellar Population Distance Indicators
• Photometric metallicity and distance estimates for $\sim$ 136,000 RR Lyrae stars from Gaia DR3
• RR Lyrae From Binary Evolution: Abundant, Young and Metal-Rich
• New Near-Infrared $JH{K}_s$ light-curve templates for RR Lyrae variables
• Metallicities from high resolution spectra of 49 RR Lyrae Variables
• Precision distances to dwarf galaxies and globular clusters from Pan-STARRS1 3$\pi$ RR Lyrae
• Kinematics and Multi Band Period-Luminosity-Metallicity Relation of RR Lyrae Stars via Statistical Parallax
• RR Lyrae mid-infrared Period-Luminosity-Metallicity and Period-Wesenheit-Metallicity relations based on Gaia DR3 parallaxes
• A fresh look at the RR Lyrae population in the Draco dwarf spheroidal galaxy with Gaia
• Hubble distancing: Focusing on distance measurements in cosmology
• Application of Convolutional Neural Networks to time domain astrophysics. 2D image analysis of OGLE light curves
• A hierarchical Bayesian model to infer PL(Z) relations using Gaia parallaxes
• Distances to Local Group Galaxies via Population II, Stellar Distance Indicators I: The Sculptor Dwarf Spheroidal
• SMHASH: A new mid-infrared RR Lyrae distance determination for the Local Group dwarf spheroidal galaxy Sculptor