1k citations · 9.5k across the 216 of their papers we have counts for
11 papers · 2 filters
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…
New Galactic multi-mode Cepheids from the ASAS-SN Survey
Johanna Jurcsik, Gergely Hajdu, Márcio Catelan
A systematic search for multi-mode Cepheids using the database of the ASAS-SN survey has led to the detection of thirteen new double-mode and two triple-mode Cepheids in the Galact…
VVV-WIT-07: another Boyajian's star or a Mamajek's object?
Roberto K. Saito, Dante Minniti, Valentin D. Ivanov +6
We report the discovery of VVV-WIT-07, an unique and intriguing variable source presenting a sequence of recurrent dips with a likely deep eclipse in July 2012. The object was foun…
Long-term Stellar Variability in the Galactic Centre Region
C. Navarro Molina, J. Borissova, M. Catelan +5
We report the detection of variable stars within a 11.5' x 11.5' region near the Galactic centre (GC) that includes the Arches and Quintuplet clusters, as revealed by the VISTA Var…
Milky Way metallicity gradient from Gaia DR2 F/1O double-mode Cepheids
Bertrand Lemasle, Gergely Hajdu, Valery Kovtyukh +8
The ratio of the first overtone (1O) / fundamental (F) periods of mixed-mode Cepheids that pulsate simultaneously in these two modes (F/1O) is metallicity-dependent. It can therefo…
An Updated Catalog of 4680 Northern Eclipsing Binaries with Algol-Type light curve morphology in the Catalina Sky Surveys
A. Papageorgiou, M. Catelan, P. -E. Christopoulou +2
We present an updated catalog of 4680 northern eclipsing binaries (EBs) with Algol-type light curve morphology (i.e., with well-defined beginning and end of primary and secondary e…
An Automated tool to detect variable sources in the Vista Variables in the V\'ıa Láctea Survey. The VVV Variables (V) catalog of tiles d001 and d002
Nicolás Medina, Jura Borissova, Amelia Bayo +8
Time-varying phenomena are one of the most substantial sources of astrophysical information and their study has led to many fundamental discoveries in modern astronomy. We have dev…
A Near-infrared RR Lyrae census along the southern Galactic plane: the Milky Way's stellar fossil brought to light
István Dékány, Gergely Hajdu, Eva K. Grebel +5
RR Lyrae stars (RRLs) are tracers of the Milky Way's fossil record, holding valuable information on its formation and early evolution. Owing to the high interstellar extinction end…
A Data-driven Study of RR Lyrae Near-IR Light Curves: Principal Component Analysis, Robust Fits, and Metallicity Estimates
Gergely Hajdu, István Dékány, Márcio Catelan +2
RR~Lyrae variables are widely used tracers of Galactic halo structure and kinematics, but they can also serve to constrain the distribution of the old stellar population in the Gal…
The Globular Cluster NGC 6402 (M14). II. Variable Stars
C. Contreras Peña, M. Catelan, F. Grundahl +2
We present time-series photometry for the Galactic globular cluster NGC 6402 (M14). The data consists of 137 images per filter, obtained using the 0.9m and 1.0m SMARTS…
Blazhko modulation in the infrared
J. Jurcsik, G. Hajdu, I. Dékány +3
We present first direct evidence of modulation in the -band of Blazhko-type RR Lyrae stars that are identified by their secular modulations in the I-band data of OGLE-IV. A meth…