Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- F. Navarra167 · h 33
- B. Barbuy2 profiles131 · h 53
- M. Nielsen2 profiles119 · h 30
- D. Gitman2 profiles118 · h 30
- J. Frenkel2 profiles102 · h 25
- E. Abdalla101 · h 37
- F. T. Brandt2 profiles93 · h 9
- M. Gomes2 profiles92 · h 16
- R. Funchal82 · h 32
- J. Fontanari81 · h 28
- G. Landi79 · h 32
- J. Horvath2 profiles78 · h 21
- Centre National de la Recherche ScientifiqueFR2.5k papers
- The Ohio State UniversityUS1.9k papers
- Institute for High Energy PhysicsES1.7k papers
- Lawrence Berkeley National LaboratoryUS1.7k papers
- Brookhaven National LaboratoryUS1.7k papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR1.6k papers
- Yale UniversityUS1.6k papers
- The University of TokyoJP1.6k papers
- Argonne National LaboratoryUS1.5k papers
- Czech Technical University in PragueCZ1.5k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR1.5k papers
- Lund UniversitySE1.5k papers
37 papers · 2 filters
Calculation of molecular line intensity in stellar atmospheres
B. Barbuy, J. Trevisan, A. de Almeida
Molecular line intensity calculations are not a straightforward task. We present a description of the basics for including molecular linesin synthetic spectra, and of the input dat…
Accurate effective temperature from H profiles
Riano E. Giribaldi, Maria L. Ubaldo-Melo, Gustavo F. Porto de Mello +4
The determination of stellar effective temperature () in F, G, and K stars using H profile fitting is a quite remarkable and powerful tool, because it practica…
The R-Process Alliance: Spectroscopic Follow-up of Low-Metallicity Star Candidates from the Best & Brightest Survey
Vinicius M. Placco, Rafael M. Santucci, Timothy C. Beers +17
We present results from an observing campaign to identify low-metallicity stars in the Best & Brightest Survey. From medium-resolution (R ~ 1, 200 - 2, 000) spectroscopy of 857 can…
J-PLUS: Identification of low-metallicity stars with artificial neural networks using SPHINX
D. D. Whitten, V. M. Placco, T. C. Beers +24
We present a new methodology for the estimation of stellar atmospheric parameters from narrow- and intermediate-band photometry of the Javalambre Photometric Local Universe Survey…
The radius inflation problem in short-period low-mass binaries: a large sample analysis
Hernan E. Garrido, Patricia Cruz, Marcos P. Diaz +1
Due to the recent increase in the availability of photometric time-series databases, the characterisation of low-mass eclipsing binaries for the study of their orbital and physical…
High-resolution abundance analysis of four red giants in the globular cluster NGC 6558
B. Barbuy, L. Muniz, S. Ortolani +8
NGC 6558 is a bulge globular cluster with a blue horizontal branch (BHB), combined with a metallicity of [Fe/H]~-1.0. It is similar to HP 1 and NGC 6522, which could be among the o…
Thorium in solar twins: implications for habitability in rocky planets
Rafael B. Botelho, Andre de C. Milone, Jorge Melendez +10
We have investigated the thorium (Th) abundance in a sample of 53 thin disc solar twins covering a wide range of ages. These data provide constrains on the mantle energy budget of…
Modelling the solar twin 18 Sco
M. Bazot, O. Creevey, J. Christensen-Dalsgaard +1
Solar twins are objects of great interest in that they allow us to understand better how stellar evolution and structure are affected by variations of the stellar mass, age and che…
What sets the magnetic field strength and cycle period in solar-type stars?
G. Guerrero, B. Zaire, P. K. Smolarkiewicz +3
Two fundamental properties of stellar magnetic fields have been determined by observations for solar-like stars with different Rossby numbers (Ro), namely, the magnetic field stren…
The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. XVI. The helium abundance of multiple populations
A. P. Milone, A. F. Marino, A. Renzini +16
Recent work, based on data from the Hubble Space Telescope (HST) UV Legacy Survey of Galactic Globular Clusters (GCs), has revealed that all the analyzed clusters host two groups o…
Short-term variability and mass loss in Be stars IV. Two groups of closely spaced, approximately equidistant frequencies in three decades of space photometry of Puppis (B7-8 IIIe)
D. Baade, A. Pigulski, Th. Rivinius +13
In early-type Be stars, groups of nonradial pulsation (NRP) modes with numerically related frequencies may be instrumental for the release of excess angular momentum through mass-e…
Astrometric and photometric study of Dias 4, Dias 6 and other five open clusters using ground based and Gaia DR2 data
Wilton S. Dias, Hektor Monteiro, Jacques R. D. Lépine +3
We present a study of 7 southern open clusters based on UBVRI CCD photomety (Johnsons-Cousins system) and Gaia DR2 data. Dias 4, Dias 6 and four other clusters had UBVRI photometri…
The Gould's Belt Distances Survey (GOBELINS). V. Distances and Kinematics of the Perseus molecular cloud
Gisela N. Ortiz-León, Laurent Loinard, Sergio A. Dzib +10
We derive the distance and structure of the Perseus molecular cloud by combining trigonometric parallaxes from Very Long Baseline Array (VLBA) observations, taken as part of the GO…
The structure of a recent nova shell as observed by ALMA
Marcos P. Diaz, Zulema Abraham, Valério A. R. M. Ribeiro +2
High resolution ALMA observations of the recent (2.52 yrs old) shell of Nova V5668 Sgr (2015) show a highly structured ionised gas distribution with small (10 cm) clumps. Th…
The R-Process Alliance: Chemical Abundances for a Trio of R-Process-Enhanced Stars -- One Strong, One Moderate, One Mild
Madelyn Cain, Anna Frebel, Maude Gull +9
We present detailed chemical abundances of three new bright (V ~ 11), extremely metal-poor ([Fe/H] ~ -3.0), r-process-enhanced halo red giants based on high-resolution, high-S/N Ma…
The Solar Twin Planet Search: The age - chromospheric activity relation
Diego Lorenzo-Oliveira, Fabrício C. Freitas, Jorge Meléndez +8
It is well known that the magnetic activity of solar type stars decreases with age, but it is widely debated in the literature whether there is a smooth decline or if there is an e…
The life cycles of Be viscous decretion discs: The case of ω CMa
M. R. Ghoreyshi, A. C. Carciofi, L. R. Rimulo +6
We analyzed V-band photometry of the Be star ω CMa, obtained during the last four decades, during which the star went through four complete cycles of disc formation and dissipation…
The Gould's Belt Distances Survey (GOBELINS). IV. Distance, Depth and Kinematics of the Taurus Star-Forming Region
Phillip A. B. Galli, Laurent Loinard, Gisela N. Ortiz-Leon +13
We present new trigonometric parallaxes and proper motions of young stellar objects in the Taurus molecular cloud complex from observations collected with the Very Long Baseline Ar…
Mass Loss Rates of Li-rich AGB/RGB Stars
W. J. Maciel, R. D. D. Costa
A sample of AGB/RGB stars with an excess of Li abundances is considered in order to estimate their mass loss rates. Our method is based on a correlation between the Li abundances a…
Spectroscopic Validation of Low-Metallicity Stars from RAVE
Vinicius M. Placco, Timothy C. Beers, Rafael M. Santucci +16
We present results from a medium-resolution (R ~ 2, 000) spectroscopic follow-up campaign of 1,694 bright (V < 13.5), very metal-poor star candidates from the RAdial Velocity Exper…
Nuclear processes in Astrophysics: Recent progress
V. Liccardo, M. Malheiro, M. S. Hussein +2
The origin of the elements is a fascinating question that scientists have been trying to answer for the last seven decades. The formation of light elements in the primordial univer…
The seven sisters DANCe IV. Bayesian hierarchical model
J. Olivares, L. M. Sarro, E. Moraux +8
Aims. We develop, test and characterise of a new statistical tool (intelligent system) for the sifting and analysis of nearby young open cluster (NYOC) populations. Methods. Using…
Gaia Data Release 2: Variable stars in the colour-absolute magnitude diagram
Gaia Collaboration, L. Eyer, L. Rimoldini +14
The ESA Gaia mission provides a unique time-domain survey for more than 1.6 billion sources with G ~ 21 mag. We showcase stellar variability across the Galactic colour-absolute mag…
Oxygen and zinc abundances in 417 Galactic bulge red giants
C. R. da Silveira, B. Barbuy, A. C. S. Friaça +7
Oxygen and zinc in the Galactic bulge are key elements for the understanding of the bulge chemical evolution. Oxygen-to-iron abundance ratios provide a most robust indicator of the…