60 citations · 291 across the 20 of their papers we have counts for
20 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…
Discovery of lambda Boo stars in open clusters
C. Saffe, J. Alacoria, A. Alejo +7
The origin of lambda Boo stars is currently unknown. After several efforts by many authors, no bona fide lambda Boo stars have been confirmed as members of open clusters. Their det…
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,…
The largest metallicity difference in twin systems: high-precision abundance analysis of the benchmark pair Krios & Kronos
P. Miquelarena, C. Saffe, M. Flores +7
Aims.We conduct a high-precision differential abundance analysis of the remarkable binary system HD 240429/30 (Krios and Kronos, respectively), whose difference in metallicity is o…
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…
Elemental abundances differences in the massive planet-hosting wide binary HD 196067-68
M. Flores, J. Yana Galarza, P. Miquelarena +6
It has been suggested that small chemical anomalies observed in planet-hosting wide binary systems could be due to planet signatures, where the role of the planetary mass is still…
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…
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…
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…
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…
Detecting prolonged activity minima in binary stars. The case of Ret
M. Flores, M. Jaque Arancibia, R. V. Ibañez Bustos +7
Context. It is well known that from 1645 to 1715 solar activity was notably low and the number of sunspots was extremely reduced. This epoch is known as the Maunder Minimum (MM). T…
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…
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…
Using non-solar-scaled opacities to derive stellar parameters. Toward high-precision parameters and abundances
C. Saffe, M. Flores, P. Miquelarena +5
We implemented non-solar-scaled opacities in a simultaneous derivation of fundamental parameters and abundances. We carried out a high-precision stellar parameters and abundance de…
HD 38858: a solar type star with a 10.8 yr activity cycle. Searching for Balmer and metallic line variations
M. Flores, J. F. González, M. Jaque Arancibia +5
Context. The detection of chromospheric activity cycles in solar-analogue and twin stars, can be used to put in context the solar cycle. However, there is a relatively low percenta…
Reticuli binary system: A puzzling chromospheric activity pattern
M. Flores, C. Saffe, A. Buccino +4
We perform, for the first time, a detailed long-term activity study of the binary system Ret. We use all available HARPS spectra obtained between the years 2003 and 2016. We bu…
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…
Discovery of an activity cycle in the solar-analog HD 45184. Exploring Balmer and metallic lines as activity proxy candidates
M. Flores, J. F. González, M. Jaque Arancibia +2
(Abridged) Most stellar activity cycles similar to that found in the Sun have been detected by using the chromospheric Ca II H&K lines as stellar activity proxies. However, it is u…
A temperature condensation trend in the debris-disk binary system Zet2 Ret
C. Saffe, M. Flores, M. Jaque Arancibia +2
We explore condensation temperature Tc trends in the unique binary system Zet1 Ret - Zet2 Ret, to determine whether there is a depletion of refractories, which could be related to…
HD 80606: Searching the chemical signature of planet formation
C. Saffe, M. Flores, A. Buccino
(Abridged) Binary systems with similar components are ideal laboratories which allow several physical processes to be tested, such as the possible chemical pattern imprinted by the…