CORE
🇺🇦
make metadata, not war
Services
Services overview
Explore all CORE services
Access to raw data
API
Dataset
FastSync
Content discovery
Recommender
Discovery
OAI identifiers
OAI Resolver
Managing content
Dashboard
Bespoke contracts
Consultancy services
Support us
Support us
Membership
Sponsorship
Community governance
Advisory Board
Board of supporters
Research network
About
About us
Our mission
Team
Blog
FAQs
Contact us
research
Confirmation of a New Metal-poor Globular Cluster in the Galactic Bulge
Authors
Alonso-Garcí
Eduardo Bica
+15 more
Charles Bonatto
Vittorio F. Braga
Clariá
Gisella Clementini
Gó
Alessia Garofalo
Maren Hempel
Valentin D. Ivanov
Phillip W. Lucas
Dante Minniti
Tali Palma
Joyce Pullen
Roberto K. Saito
E.F. Schlafly
Leigh C. Smith
Publication date
1 January 2018
Publisher
'American Astronomical Society'
Doi
Cite
Abstract
© 2018. The American Astronomical Society. All rights reserved.We use deep near-IR photometry of the VISTA Variables in the V'a L'ctea (VVV) Survey and deep DECam Plane Survey (DECaPS) optical photometry to confirm the physical reality of the candidate globular cluster (GC) Minni 22, which is located in the Galactic bulge. This object, which was detected as a high density region in our maps of bulge red giants, is now confirmed as a real GC based on the optical and near-IR color'magnitude diagrams. We also recover three known fundamental mode (ab type) RR Lyrae stars within 2 arcmin of the cluster center. The presence of RR Lyrae stars also seems to confirm Minni 22 as a bonafide old and metal-poor GC. We estimate a cluster reddening E(J - Ks) = 0.6 mag and determine its heliocentric distance D = 7.4 ± 0.3 kpc. The optical and near-IR color'magnitude diagrams reveal well-defined red giant branches in all cases, including a red giant branch bump at Ks = 13.30 ± 0.05 mag. The comparison with theoretical isochrones yields a mean metallicity of [Fe/H] = -1.3 ± 0.3 dex, and age of t ∼ 11.2 Gyr. This is a good example of a new low-luminosity (MV = -6.2 mag) GC found in the central bulge of the Milky Way. After discussing the different ways to confirm the existence of bulge GC candidates, we find that one of the best methods is to use the CMDs from the combination of the DECaPS + VVV photometries.Peer reviewe
Similar works
Full text
Open in the Core reader
Download PDF
Available Versions
Archivio istituzionale della ricerca - Alma Mater Studiorum Università di Bologna
See this paper in CORE
Go to the repository landing page
Download from data provider
oai:cris.unibo.it:11585/659984
Last time updated on 04/09/2019
University of Hertfordshire Research Archive
See this paper in CORE
Go to the repository landing page
Download from data provider
oai:uhra.herts.ac.uk:2299/2076...
Last time updated on 09/03/2020
LAReferencia - Red Federada de Repositorios Institucionales de Publicaciones Científicas Latinoamericanas
See this paper in CORE
Go to the repository landing page
Download from data provider
oai:ri.conicet.gov.ar:11336/10...
Last time updated on 26/12/2021
Lume 5.8
See this paper in CORE
Go to the repository landing page
Download from data provider
oai:www.lume.ufrgs.br:10183/18...
Last time updated on 05/04/2020
CONICET Digital
See this paper in CORE
Go to the repository landing page
Download from data provider
oai:ri.conicet.gov.ar:11336/10...
Last time updated on 14/05/2020