FSR 1716: A new Milky Way Globular Cluster confirmed using VVV RR Lyrae stars
dc.contributor.author | Minniti, Dante | |
dc.contributor.author | Palma, Tali | |
dc.contributor.author | Dékány, Istvan | |
dc.contributor.author | Hempel, Maren | |
dc.contributor.author | Rejkuba, Marina | |
dc.contributor.author | Pullen, Joyce | |
dc.contributor.author | Alonso-García, Javier | |
dc.contributor.author | Barbá, Rodolfo | |
dc.contributor.author | Barbuy, Beatriz | |
dc.contributor.author | Bica, Eduardo | |
dc.contributor.author | Bonatto, Charles | |
dc.contributor.author | Borissova, Jura | |
dc.contributor.author | Catelan, Marcio | |
dc.contributor.author | Carballo-Bello, Julio A. | |
dc.contributor.author | Chene, Andre Nicolas | |
dc.contributor.author | Clariá, Juan J. | |
dc.contributor.author | Cohen, Roger E. | |
dc.contributor.author | Contreras-Ramos, Rodrigo | |
dc.contributor.author | Dias, Bruno | |
dc.contributor.author | Emerson, Jim | |
dc.contributor.author | Froebrich, Dirk | |
dc.contributor.author | Buckner, Anne S. M. | |
dc.contributor.author | Geisler, Douglas | |
dc.contributor.author | Gonzalez, Oscar A. | |
dc.contributor.author | Gran, Felipe | |
dc.contributor.author | Hagdu, Gergely | |
dc.contributor.author | Irwin, Mike | |
dc.contributor.author | Ivanov, Valentin D. | |
dc.contributor.author | Kurtev, Radostin | |
dc.contributor.author | Lucas, Philip W. | |
dc.contributor.author | Majaess, Daniel | |
dc.contributor.author | Mauro, Francesco | |
dc.contributor.author | Moni-Bidin, Christian | |
dc.contributor.author | Navarrete, Camila | |
dc.contributor.author | Alegría, Sebastian Ramírez | |
dc.contributor.author | Saito, Roberto K. | |
dc.contributor.author | Valenti, Elena | |
dc.contributor.author | Zoccali, Manuela | |
dc.date.accessioned | 2018-09-22T09:12:23Z | |
dc.date.available | 2018-09-22T09:12:23Z | |
dc.date.issued | 2017-03-24 | |
dc.identifier.citation | Minniti , D , Palma , T , Dékány , I , Hempel , M , Rejkuba , M , Pullen , J , Alonso-García , J , Barbá , R , Barbuy , B , Bica , E , Bonatto , C , Borissova , J , Catelan , M , Carballo-Bello , J A , Chene , A N , Clariá , J J , Cohen , R E , Contreras-Ramos , R , Dias , B , Emerson , J , Froebrich , D , Buckner , A S M , Geisler , D , Gonzalez , O A , Gran , F , Hagdu , G , Irwin , M , Ivanov , V D , Kurtev , R , Lucas , P W , Majaess , D , Mauro , F , Moni-Bidin , C , Navarrete , C , Alegría , S R , Saito , R K , Valenti , E & Zoccali , M 2017 , ' FSR 1716: A new Milky Way Globular Cluster confirmed using VVV RR Lyrae stars ' , Astrophysical Journal Letters , vol. 838 , no. 1 , L14 . https://doi.org/10.3847/2041-8213/838/1/L14 | |
dc.identifier.issn | 2041-8205 | |
dc.identifier.other | ArXiv: http://arxiv.org/abs/1703.02033v1 | |
dc.identifier.other | ORCID: /0000-0002-8872-4462/work/62748903 | |
dc.identifier.uri | http://hdl.handle.net/2299/20634 | |
dc.description | 7 pages, 4 figures. © 2017. The American Astronomical Society. All rights reserved. | |
dc.description.abstract | We use deep multi-epoch near-IR images of the VISTA Variables in the V\'ia L\'actea (VVV) Survey to search for RR Lyrae stars towards the Southern Galactic plane. Here we report the discovery of a group of RR Lyrae stars close together in VVV tile d025. Inspection of the VVV images and PSF photometry reveals that most of these stars are likely to belong to a globular cluster, that matches the position of the previously known star cluster FSR\,1716. The stellar density map of the field yields a $>100$ sigma detection for this candidate globular cluster, that is centered at equatorial coordinates $RA_{J2000}=$16:10:30.0, $DEC_{J2000}=-$53:44:56; and galactic coordinates $l=$329.77812, $b=-$1.59227. The color-magnitude diagram of this object reveals a well populated red giant branch, with a prominent red clump at $K_s=13.35 \pm 0.05$, and $J-K_s=1.30 \pm 0.05$. We present the cluster RR Lyrae positions, magnitudes, colors, periods and amplitudes. The presence of RR Lyrae indicates an old globular cluster, with age $>10$ Gyr. We classify this object as an Oosterhoff type I globular cluster, based on the mean period of its RR Lyrae type ab, $ =0.540$ days, and argue that this is a relatively metal-poor cluster with $[Fe/H] = -1.5 \pm 0.4$ dex. The mean extinction and reddening for this cluster are $A_{K_s}=0.38 \pm 0.02$, and $E(J-K_s)=0.72 \pm 0.02$ mag, respectively, as measured from the RR Lyrae colors and the near-IR color-magnitude diagram. We also measure the cluster distance using the RR Lyrae type ab stars. The cluster mean distance modulus is $(m-M)_0 = 14.38 \pm 0.03$ mag, implying a distance $D = 7.5 \pm 0.2$ kpc, and a Galactocentric distance $R_G=4.3$ kpc. | en |
dc.format.extent | 5427270 | |
dc.language.iso | eng | |
dc.relation.ispartof | Astrophysical Journal Letters | |
dc.subject | astro-ph.GA | |
dc.subject | astro-ph.SR | |
dc.title | FSR 1716: A new Milky Way Globular Cluster confirmed using VVV RR Lyrae stars | en |
dc.contributor.institution | Centre for Astrophysics Research (CAR) | |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.description.status | Peer reviewed | |
dc.date.embargoedUntil | 2018-03-20 | |
dc.identifier.url | https://arxiv.org/abs/1703.02033 | |
rioxxterms.versionofrecord | 10.3847/2041-8213/838/1/L14 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true |