1.2k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Consejo Nacional de Investigaciones Científicas y TécnicasAR105 papers
- National University of San JuanAR51 papers
- University of La SerenaCL38 papers
- Institute of Astronomy and Space PhysicsAR34 papers
- European Southern ObservatoryCL28 papers
- Argentine National ObservatoryAR25 papers
- Universidad Nacional de La PlataAR25 papers
- Leibniz Institute for Astrophysics PotsdamDE24 papers
- Universidad de Buenos AiresAR23 papers
- Instituto de Astrofísica de La Plata20 papers
- Universidad Nacional de CórdobaAR18 papers
- Centro Científico Tecnológico - San JuanAR16 papers
159 papers
A search for new symbiotic stars in the Milky Way: Using machine learning techniques applied to photometric databases
V. Contreras Rojas, M. Jaque Arancibia, C. E. Ferreira Lopes +8
Symbiotic stars (SySts) are interacting binaries composed of a red giant transferring material to a hot compact star, typically a white dwarf. Although only about 300 systems are c…
Skykatana: a scalable framework to construct sky masks for the Vera Rubin Observatory and large astronomical surveys
Claudio Lopez, Emilio Donoso, Mariano Javier de L. Dominguez Romero
Modern wide-field surveys require robust spatial masks to excise bright-star halos, bleed trails, poor-quality regions, and user-defined geometry at scale. We present Skykatana, an…
Searching for lambda Boo stars in binary systems
J. Alacoria, C. Saffe, A. Collado +7
Our goal is to find new candidate lambda Boo stars that belong to binary systems. A detailed abundance determination of some candidates could confirm their true lambda Boo nature,…
Strong signature of right-handed circularly polarized photoionization close to the cyclotron line in the atmosphere of magnetic white dwarfs
René D. Rohrmann
Magnetic fields break the symmetry of the interaction of atoms with photons with different polarizations, yielding chirality and anisotropy properties. The dependence of the absorp…
The VISTA Variables in the Vía Láctea eXtended (VVVX) ESO public survey: Completion of the observations and legacy
R. K. Saito, M. Hempel, J. Alonso-García +143
The ESO public survey VISTA Variables in the Vía Láctea (VVV) surveyed the inner Galactic bulge and the adjacent southern Galactic disk from . Upon its conclusion, the c…
A numerical code for the analysis of magnetic white dwarf spectra that includes field effects on the chemical equilibrium
Matías Vera-Rueda, René D. Rohrmann
We present a new magnetic-atmosphere model code for obtaining synthetic spectral fluxes of hydrogen-rich magnetic white dwarfs. To date, observed spectra have been analyzed with mo…
Disentangling the origin of chemical differences using GHOST
C. Saffe, P. Miquelarena, J. Alacoria +8
Aims. We explore different scenarios to explain the chemical difference found in the remarkable giant-giant binary system HD 138202 + CD-30 12303. For the first time, we suggest ho…
NIRDust: Probing Hot Dust Emission Around Type 2 AGN Using K-band Spectra
Gaia Gaspar, Martín Chalela, Juan Cabral +3
Hot dust in the proximity of AGNs strongly emits in the Near Infrared producing a red excess that, in type 2 sources, can be modeled to measure its temperature. In the era of high…
Protective Effects of Halite to Vacuum and Vacuum-Ultraviolet Radiation: A Potential Scenario During a Young Sun Superflare
Ximena C. Abrevaya, Douglas Galante, Paula M. Tribelli +16
Halite (NaCl mineral) has exhibited the potential to preserve microorganisms for millions of years on Earth. This mineral was also identified on Mars and in meteorites. In this stu…
Correlation between activity indicators: H and Ca II lines in M-dwarf stars
R. V. Ibañez Bustos, A. P. Buccino, M. Flores +2
Different approaches have been adopted to study short- and long-term stellar magnetic activity, and although the mechanisms by which low-mass stars generate large-scale magnetic fi…
A candidate magnetic helium core white dwarf in the globular cluster NGC 6397
Manuel Pichardo Marcano, Liliana E. Rivera Sandoval, Thomas J. Maccarone +5
We report a peculiar variable blue star in the globular cluster NGC 6397, using Hubble Space Telescope optical imaging. Its position in the colour-magnitude diagrams, and its spect…
Taking a break: paused accretion in the symbiotic binary RT Cru
A. Pujol, G. J. M. Luna, K. Mukai +10
Symbiotic binaries sometimes hide their symbiotic nature for significant periods of time. There is mounting observational evidence that in those symbiotics that are powered solely…
Are Am stars and hot-Jupiter planets related?
C. Saffe, J. Alacoria, P. Miquelarena +8
Am stars are often components of short-period binary systems, where tidal interactions would result in low rotational velocities and help to develop the chemical peculiarities obse…
Rayleigh scattering from hydrogen atoms including resonances and high photon energies
René D. Rohrmann, Matías Vera Rueda
The non-relativistic cross section from Rayleigh scattering by hydrogen atoms in the ground state is calculated over a wide range of photon energies ( keV). Evaluations are…
Testing the accretion scenario of lambda Boo stars
J. Alacoria, C. Saffe, M. Jaque Arancibia +5
Our aim is to test the accretion scenario of lambda Boo stars. This model predicts that a binary system with two early-type stars passing through a diffuse cloud should both displa…
Activity cycles in RS CVn type stars
C. I. Martínez, P. J. D. Mauas, A. P. Buccino
We compile a list of 121 RS CVn type stars from the bibliography in southern hemisphere, to search for activity cycles, covering a large range of luminosities and rotation periods.…
The peculiar chemical pattern of the WASP-160 binary system: signatures of planetary formation and evolution?
Emiliano Jofré, Romina Petrucci, Yilen Gómez Maqueo Chew +8
Wide binary stars with similar components hosting planets provide a favorable opportunity for exploring the star-planet chemical connection. We perform a detailed characterization…
Fundamental parameters of the eclipsing binary DD CMa and evidence for mass exchange
J. A. Rosales, R. E. Mennickent, G. Djurašević +5
We present a detailed photometric and spectroscopic analysis of DD CMa, based on published survey photometry and new spectroscopic data. We find an improved orbital period of $P_\m…
Constraints on planetesimal accretion inferred from particle-size distribution in CO chondrites
Gabriel A. Pinto, Yves Marrocchi, Alessandro Morbidelli +5
The formation of planetesimals was a key step in the assemblage of planetary bodies, yet many aspects of their formation remain poorly constrained. Notably, the mechanism by which…
Searching for new solar twins: The Inti survey for the Northern Sky
J. Y. Galarza, R. López-Valdivia, D. Lorenzo-Oliveira +9
Solar twins are key in different areas of astrophysics, however only just over a hundred were identified and well-studied in the last two decades. In this work, we take advantage o…
Chemical analysis of early-type stars with planets
C. Saffe, P. Miquelarena, J. Alacoria +6
Aims. To explore the chemical pattern of early-type stars with planets, searching for a possible signature of planet formation. In particular, we study a likely relation between th…
Spectroscopic observations of the machine-learning selected anomaly catalogue from the AllWISE Sky Survey
A. Solarz, R. Thomas, F. M. Montenegro-Montes +7
We present the results of a programme to search and identify the nature of unusual sources within the All-sky Wide-field Infrared Survey Explorer (WISE) that is based on a machine-…
KELT-17: a chemically peculiar Am star and a hot-Jupiter planet
C. Saffe, P. Miquelarena, J. Alacoria +6
Context. The detection of planets orbiting chemically peculiar stars is very scarcely known in the literature. Aims. To determine the detailed chemical composition of the remarkabl…
HATS: A Ground-Based Telescope to Explore the THz Domain
C. G. Giménez de Castro, J. -P. Raulin, A. Valio +11
The almost unexplored frequency window from submillimeter to mid-infrared (mid-IR) may bring new clues about the particle acceleration and transport processes and the atmospheric t…