112 citations · 1.1k across the 55 of their papers we have counts for
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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…
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…
The Orbit of the new Milky Way Globular Cluster FSR1716 = VVV-GC05
Rodrigo Contreras Ramos, Dante Minniti, Jose G. Fernandez-Trincado +10
We use deep multi-epoch near-IR images of the VISTA Variables in the Via Lactea (VVV) Survey to measure proper motions (PMs) of stars in the Milky Way globular cluster FSR1716 = VV…
Establishing the Galactic Centre Distance Using VVV Bulge RR Lyrae Variables
D. Majaess, I. Dékány, G. Hajdu +3
This study's objective was to exploit infrared VVV (VISTA Variables in the Via Lactea) photometry for high latitude RRab stars to establish an accurate Galactic Centre distance. RR…
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…
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…