427 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 TécnicasAR78 papers
- Universidad Nacional de La PlataAR40 papers
- Argentine National ObservatoryAR28 papers
- Universidad Nacional de CórdobaAR28 papers
- Balseiro InstituteAR22 papers
- Institute of Astronomy and Space PhysicsAR22 papers
- Fundación Ciencias Exactas y NaturalesAR21 papers
- Bariloche Atomic CentreAR20 papers
- Comisión Nacional de Energía AtómicaAR19 papers
- Instituto de Astrofísica de La Plata19 papers
- Universidad de Buenos AiresAR18 papers
- National University of San JuanAR17 papers
25 papers · 1 filter
Modeling the high-brightness state of the recurrent nova T CrB as an enhanced mass-transfer event
Wagner Schlindwein, Raymundo Baptista, Gerardo Juan Manuel Luna
T~Coronae Borealis is the nearest symbiotic recurrent nova. Twice in the last two centuries, in 1866 and 1946, the accreted material ignited on the surface of the white dwarf via r…
Unveiling compact planetary nebulae: Broad-band survey analysis and LAMOST confirmation
L. A. Gutiérrez-Soto, M. Belén Mari, W. A. Weidmann +1
Planetary nebulae (PNe) are pivotal for advancing our knowledge of stellar evolution and galactic chemical enrichment. Recent progress in surveys and data analysis has revolutioniz…
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,…
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…
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…
Type II supernovae from the Carnegie Supernova Project-I. I. Bolometric light curves of 74 SNe II using uBgVriYJH photometry
L. Martinez, M. C. Bersten, J. P. Anderson +18
The present study is the first of a series of three papers where we characterise the type II supernovae (SNe~II) from the Carnegie Supernova Project-I to understand their diversity…
Type II supernovae from the Carnegie Supernova Project-I. II. Physical parameter distributions from hydrodynamical modelling
L. Martinez, M. C. Bersten, J. P. Anderson +18
Linking supernovae to their progenitors is a powerful method for furthering our understanding of the physical origin of their observed differences, while at the same time testing s…
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…
Hunting white dwarfs at the center of planetary nebulae
Javier Ahumada, Walter Weidmann, Marcelo Miller Bertolami +1
We present Gemini-South observations of nine faint and extended planetary nebulae. Using direct images taken with the spectrograph GMOS, we built the vs. di…
High-precision analysis of binary stars with planets. I. Searching for condensation temperature trends in the HD 106515 system
C. Saffe, E. Jofre, P. Miquelarena +4
We explore the probable chemical signature of planet formation in the remarkable binary system HD 106515. The A star hosts a massive long-period planet with 9 MJup detected by radi…
The white dwarf mass-radius relation and its dependence on the hydrogen envelope
Alejandra D. Romero, S. O. Kepler, S. R. G. Joyce +2
We present a study of the dependence of the mass-radius relation for DA white dwarf stars on the hydrogen envelope mass and the impact on the value of log g, and thus the determina…
Quest for the Donor Star in the Magnetic Precataclysmic Variable V1082 Sgr
G. Tovmassian, J. F. Gonzalez, M. -S. Hernandez +3
We obtained high-resolution spectra and multicolor photometry of V1082 Sgr to study the donor star in this 20.8 hr orbital period binary, which is assumed to be a detached system.…
Signatures of rocky planet engulfment in HAT-P-4. Implications for chemical tagging studies
C. Saffe, E. Jofré, E. Martioli +3
Aims. To explore the possible chemical signature of planet formation in the binary system HAT-P-4, by studying abundance vs condensation temperature Tc trends. The star HAT-P-4 hos…
A Bright Short Period M-M Eclipsing Binary from the KELT Survey: Magnetic Activity and the Mass-Radius Relationship for M-dwarfs
Jack B. Lubin, Joseph E. Rodriguez, George Zhou +26
We report the discovery of KELT J041621-620046, a moderately bright (J10.2) M dwarf eclipsing binary system at a distance of 393 pc. KELT J041621-620046 was first identi…
Multi-wavelength observations of vortex-like flows in the photosphere using ground-based and space-borne telescopes
J. Palacios, S. Vargas Domínguez, L. A. Balmaceda +2
In this work we follow a series of papers on high-resolution observations of small-scale structures in the solar atmosphere \citep[][Cabello et al., in prep]{Balmaceda2009, Balmace…
The beta Pictoris association: Catalog of photometric rotational periods of low-mass members and candidate members
S. Messina, M. Millward, A. Buccino +19
We intended to compile the most complete catalog of bona fide members and candidate members of the beta Pictoris association, and to measure their rotation periods and basic proper…
2D cellular automaton model for the evolution of active region coronal plasmas
Marcelo López Fuentes, James A. Klimchuk
We study a 2D cellular automaton (CA) model for the evolution of coronal loop plasmas. The model is based on the idea that coronal loops are made of elementary magnetic strands tha…
Bright 30 THz Impulsive Solar Bursts
P. Kaufmann, S. M. White, R. Marcon +10
Impulsive 30 THz continuum bursts have been recently observed in solar flares, utilizing small telescopes with a unique and relatively simple optical setup concept. The most intens…
The Counter-kink Rotation of a Non-Hale Active Region
M. C. López Fuentes, P. Démoulin, C. H. Mandrini +1
We describe the long-term evolution of a bipolar non-Hale active region which was observed from October, 1995, to January, 1996. Along these four solar rotations the sunspots and s…
3D MHD simulation of flare supra-arcade downflows in a turbulent current sheet medium
M. Cécere, E. Zurbriggen, A. Costa +1
Supra-arcade downflows (SADs) are sunward, generally dark, plasma density depletions originated above posteruption flare arcades. In this paper using 3D MHD simulations we investig…
Evolution of small-scale magnetic elements in the vicinity of granular-size swirl convective motions
S. Vargas Dominguez, J. Palacios, L. Balmaceda +2
Advances in solar instrumentation have led to a widespread usage of time series to study the dynamics of solar features, specially at small spatial scales and at very fast cadences…
Sub-THz and Hα activity during the preflare and main phases of a GOES class M2 event
Pierre Kaufmann, Rogério Marcon, C. Guillermo Giménez de Castro +8
Radio and optical observations of the evolution of flare-associated phenomena have shown an initial and rapid burst at 0.4 THz only followed subsequently by a localized chromospher…
Accurate stellar rotational velocities using the Fourier transform of the cross correlation maximum
C. G. Díaz, J. F. González, H. Levato +1
We propose a method for measuring the projected rotational velocity with high-precision even in spectra with blended lines. Though not automatic, our method is designed t…