79 citations · 1.2k across the 49 of their papers we have counts for
49 papers
The treasure behind the haystack: MUSE analysis of five recently discovered globular clusters
F. Gran, G. Kordopatis, M. Zoccali +10
After the second data release of Gaia, the number of new globular cluster candidates has increased importantly. However, most of them need to be properly characterised, both spectr…
Infrared variability of young solar analogs in the Lagoon Nebula
C. Ordenes-Huanca, M. Zoccali, A. Bayo +9
T Tauri stars are low-mass pre-main sequence stars that are intrinsically variable. Due to the intense magnetic fields they possess, they develop dark spots on their surface that,…
Spectroscopic analysis of VVV CL001 cluster with MUSE
Julio Olivares Carvajal, Manuela Zoccali, Alvaro Rojas-Arriagada +4
Like most spiral galaxies, the Milky Way contains a population of blue, metal-poor globular clusters and another of red, metal-rich ones. Most of the latter belong to the bulge, an…
The VVV survey: Long-period variable stars I. Photometric catalog of ten VVV/OGLE tiles
F. Nikzat, C. E. Ferreira Lopes, M. Catelan +7
Long-period variable stars (LPVs) are pulsating red giants, primarily in the asymptotic giant branch phase, and they include both Miras and semi-regular variables (SRVs). Their per…
Hidden in the Haystack: Low-luminosity globular clusters towards the Milky Way bulge
F. Gran, M. Zoccali, I. Saviane +8
Recent wide-area surveys have enabled us to study the Milky Way with unprecedented detail. Its inner regions, hidden behind dust and gas, have been partially unveiled with the arri…
CAPOS: The bulge Cluster APOgee Survey I. Overview and initial ASPCAP results
Doug Geisler, Sandro Villanova, Julia E. O'Connell +39
Context. Bulge globular clusters (BGCs) are exceptional tracers of the formation and chemodynamical evolution of this oldest Galactic component. However, until now, observational d…
Variable stars in the VVV globular clusters. II. NGC6441, NGC6569, NGC6626 (M28), NGC6656 (M22), 2MASS-GC02, and Terzan10
Javier Alonso-García, Leigh C. Smith, Márcio Catelan +18
The Galactic globular clusters (GGCs) located in the inner regions of the Milky Way suffer from high extinction that makes their observation challenging. The VVV survey provides a…
Infrared photometry and CaT spectroscopy of globular cluster M 28 (NGC 6626)
C. Moni Bidin, F. Mauro, R. Contreras Ramos +12
Recent studies show that the inner Galactic regions host genuine bulge globular clusters, but also halo intruders, complex remnants of primordial building blocks, and objects likel…
The RR Lyrae projected density distribution from the Galactic centre to the halo
Maria Gabriela Navarro, Dante Minniti, Roberto Capuzzo-Dolcetta +4
The projected density distribution of type ab RR Lyrae (RRab) stars was characterised from the innermost regions of the Milky Way to the halo, with the aim of placing constraints o…
Using classical Cepheids to study the far side of the Milky Way disk: I. Spectroscopic classification and the metallicity gradient
J. H. Minniti, L. Sbordone, A. Rojas-Arriagada +9
The structure, kinematics, and chemical composition of the far side of the Milky Way disk, beyond the bulge, are still to be revealed. Classical Cepheids (CCs) are young and lumino…
Type II Cepheids as stellar tracers and distance indicators
Anupam Bhardwaj, Vittorio F. Braga, Dante Minniti +2
Type II Cepheids are both useful distance indicators and tracers of old age stellar populations in their host galaxy. We summarize near-infrared observations of type II Cepheids in…
VVV Survey Microlensing: the Galactic Latitude Dependence
Maria Gabriela Navarro, Dante Minniti, Joyce Pullen +1
We search for microlensing events in fields along the Galactic minor axis, ranging from the Galactic center to -3.7<b< 3.9 deg., using the VVV survey near-IR photometry. The new se…
VVV-WIT-04: an extragalactic variable source caught by the VVV Survey
Roberto K. Saito, Dante Minniti, Valentin D. Ivanov +8
We report the discovery of VVV-WIT-04, a near-infrared variable source towards the Galactic disk located ~0.2 arcsec apart from the position of the radio source PMN J1515-5559. The…
A Color-Excess Extinction map of the Southern Galactic disk from the VVV and GLIMPSE Surveys
M. Soto, R. Barbá, D. Minniti +24
An improved high-resolution and deep A foreground dust extinction map is presented for the Galactic disk area within , $-1.0^{\c…
Microlensing events in the Galactic bulge
Maria Gabriela Navarro, Dante Minniti, Roberto Capuzzo-Dolcetta +2
For the first time we detected microlensing events at zero latitude in the Galactic bulge using the VISTA Variables in the Via Lactea Survey (VVV) data. We have discovered a total…
Analysis of the physical nature of 22 New VVV Survey Globular Cluster candidates in the Milky Way Bulge
Tali Palma, Dante Minniti, Javier Alonso-García +11
In order to characterize 22 new globular cluster (GC) candidates in the Galactic bulge, we present their colour-magnitude diagrams (CMDs) and Ks-band luminosity functions (LFs) usi…
Globular cluster candidates in the Galactic bulge: Gaia and VVV view of the latest discoveries
F. Gran, M. Zoccali, R. Contreras Ramos +7
Thanks to the recent wide-area photometric surveys, the number of star cluster candidates have risen exponentially in the last few years. Most detections, however, are based only o…
The asymptotic evolution of the stellar merger V1309 Sco: a Blue Straggler in the making?
Thiago Ferreira, Roberto K. Saito, Dante Minniti +4
Stellar mergers are estimated to be common events in the Galaxy. The best studied stellar merger case to date is V1309 Sco (= Nova Scorpii 2008) which was originally misclassified…
New variable stars in NGC 6652 and its background Sagittarius stream
Ricardo Salinas, A. Katherina Vivas, Rodrigo Contreras Ramos
We conducted a variable star search on the metal-rich Galactic globular cluster NGC 6652 using archival Gemini-S/GMOS data. We report the discovery of nine new variable stars in th…
unVEil the darknesS of The gAlactic buLgE (VESTALE)
G. Bono, M. Dall'Ora, M. Fabrizio +55
The main aim of this experiment is to provide a complete census of old (t > 10 Gyr, RR Lyrae, type II Cepheids, red horizontal branch), intermediate age (red clump, Miras) and youn…
Discovery of Tidal RR LYRAE stars in the Bulge Globular Cluster M 62
Dante Minniti, José G. Fernández-Trincado, Vincenzo Ripepi +3
The RR Lyrae (RRL) rich globular cluster M 62 (NGC 6266) is one of the most massive globular clusters in the Milky Way, located in the dense region of the Galactic bulge, where dyn…
VVV Survey Microlensing: the Galactic Longitude Dependence
María Gabriela Navarro, Dante Minniti, Rodrigo Contreras Ramos
We completed the search for microlensing events in the zero latitude area of the Galactic bulge using the VVV Survey near-IR data obtained between 2010 and 2015. We have now a tota…
Structure and kinematics of Type II Cepheids in the Galactic bulge based on near-infrared VVV data
V. F. Braga, A. Bhardwaj, R. Contreras Ramos +5
Type II Cepheids (T2Cs) are radially pulsating variables that trace old stellar populations and provide distance estimates through their period-luminosity (PL) relation. We trace t…
Milky Way demographics with the VVV survey. IV. PSF photometry from almost one billion stars in the Galactic bulge and adjacent southern disk
Javier Alonso-García, Roberto K. Saito, Maren Hempel +10
The inner regions of the Galaxy are severely affected by extinction, which limits our capability to study the stellar populations present there. The Vista Variables in the Via Lact…