VMC RR Lyrae in LMC

We present results from an analysis of ~29000 RR Lyrae stars located in the Large Magellanic Cloud (LMC). For these objects, near-infrared time-series photometry from the VISTA survey of the Magellanic Clouds system (VMC) and optical data from the Optical Gravitational Lensing Experiment (OGLE) IV survey and the Gaia Data Release 2 catalogue of confirmed RR Lyrae stars were exploited. Using VMC and OGLE IV magnitudes we derived period-luminosity (PL), period-luminosity-metallicity (PLZ), period-Wesenheit (PW), and period-Wesenheit-metallicity (PWZ) relations in all available bands. More that 7000 RR Lyrae were discarded from the analysis because they appear to be overluminous with respect to the PL relations. The PL_K_s_ relation was used to derive individual distance to ~22000 RR Lyrae stars, and study the three-dimensional structure of the LMC. The distribution of the LMC RR Lyrae stars is ellipsoidal with the three axis S_1_=6.5kpc, S_2_=4.6kpc, and S_3_=3.7kpc, inclination i=22+/-4{deg} relative to the plane of the sky and position angle of the line of nodes {theta}=167+/-7{deg} (measured from north to east). The north-eastern part of the ellipsoid is closer to us and no particular associated substructures are detected and neither any metallicity gradient.

Cone search capability for table J/MNRAS/504/1/table3 (List of LMC RRLs analysed in the paper)

Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/MNRAS/504/1
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/504/1
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/504/1
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/MNRAS/504/1
Creator Cusano F.; Moretti M.I.; Clementini G.; Ripepi V.; Marconi M.,Cioni M.-R.L.; Rubele S.; Garofalo A.; De Grijs R.; Groenewegen M.A.T.,Oliveira J.M.; Subramanian S.; Sun N.-C.; Van Loon J.T.
Publisher CDS
Publication Year 2024
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Galactic and extragalactic Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy