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19932026
most citedThe Gaia mission

7.1k citations

Showing 2018Show all

202 papers · 1 filter

cs.CV2018★ 283 cited

Monte-Carlo Sampling applied to Multiple Instance Learning for Histological Image Classification

Marc Combalia, Veronica Vilaplana

We propose a patch sampling strategy based on a sequential Monte-Carlo method for high resolution image classification in the context of Multiple Instance Learning. When compared w…

astro-ph.IM2018★ 9 cited

Why Chromatic Imaging Matters

Joel Sanchez-Bermudez, Florentin Millour, Fabien Baron +15

During the last two decades, the first generation of beam combiners at the Very Large Telescope Interferometer has proved the importance of optical interferometry for high-angular…

gr-qc2018★ 18 cited

Nonminimally coupled Weyl gravity

Cláudio Gomes, Orfeu Bertolami

Weyl gravity in the presence of a non-minimal matter-curvature coupling is presented. Some properties arising from the non-metricity give rise to a second order theory whose vacuum…

astro-ph.EP2018★ 34 cited

Detectability of shape deformation in short-period exoplanets

B. Akinsanmi, S. C. C. Barros, N. C. Santos +4

Short-period planets suffer from extreme tidal forces from their parent stars causing them to deform and attain non-spherical shapes. The planet shapes, modeled here as triaxial el…

math.DS2018

Large deviations for dynamical systems with stretched exponential decay of correlations

Romain Aimino, Jorge Milhazes Freitas

We obtain large deviations estimates for systems with stretched exponential decay of correlations, which improve the ones obtained in \cite{AFLV11}. As a consequence we obtain bett…

astro-ph.EP2018★ 64 cited

Bright Opportunities for Atmospheric Characterization of Small Planets: Masses and Radii of K2-3 b, c, d and GJ3470 b from Radial Velocity Measurements and Spitzer Transits

Molly R. Kosiarek, Ian J. M. Crossfield, Kevin K. Hardegree-Ullman +36

We report improved masses, radii, and densities for four planets in two bright M-dwarf systems, K2-3 and GJ3470, derived from a combination of new radial velocity and transit obser…

astro-ph.EP2018★ 44 cited

HD219666b: A hot-Neptune from TESS Sector 1

M. Esposito, D. J. Armstrong, D. Gandolfi +73

We report on the confirmation and mass determination of a transiting planet orbiting the old and inactive G7 dwarf star HD219666 (Mstar = 0.92 +/- 0.03 MSun, Rstar = 1.03 +/- 0.03…

astro-ph.CO2018★ 10 cited

Dynamics of junctions and the multi-tension velocity-dependent one-scale model

I. Yu. Rybak, A. Avgoustidis, C. J. A. P. Martins

The dynamics of string junctions and their influence on the evolution of cosmic superstring networks are studied in full detail. We review kinematic constraints for colliding strin…

astro-ph.CO2018★ 45 cited

Scaling properties of cosmological axion strings

C. J. A. P. Martins

There has been recent interest in the evolution and cosmological consequences of global axionic string networks, and in particular in the issue of whether or not these networks rea…

math.OC2018★ 18 cited

An indirect numerical method for a time-optimal state-constrained control problem in a steady two-dimensional fluid flow

Roman Chertovskih, Nathalie T. Khalil, Dmitry Karamzin +1

This article concerns the problem of computing solutions to state-constrained optimal control problems whose trajectory is affected by a flow field. This general mathematical frame…

astro-ph.SR2018★ 16 cited

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…

astro-ph.GA2018

The impact of spiral density waves on the star formation distribution: a view from core-collapse supernovae

A. G. Karapetyan, A. A. Hakobyan, L. V. Barkhudaryan +4

We present an analysis of the impact of spiral density waves (DWs) on the radial and surface density distributions of core-collapse (CC) supernovae (SNe) in host galaxies with diff…

astro-ph.EP2018★ 8 cited

SOPHIE velocimetry of Kepler transit candidates. XIX. The transiting temperate giant planet KOI-3680b

G. Hebrard, A. S. Bonomo, R. F. Diaz +15

Whereas thousands of transiting giant exoplanets are known today, only a few are well characterized with long orbital periods. Here we present KOI-3680b, a new planet in this categ…

cond-mat.mes-hall2018★ 8 cited

Transmission across a bilayer graphene region

Hadi Z. Olyaei, Pedro Ribeiro, Eduardo V. Castro

The transmission across a graphene bilayer region is calculated for two different types of connections to monolayer leads. A transfer matrix algorithm based on a tight binding mode…

astro-ph.GA2018★ 261 cited

Spatially resolved rotation of the broad-line region of a quasar at sub-parsec scale

GRAVITY Collaboration, E. Sturm, J. Dexter +32

The broadening of atomic emission lines by high-velocity motion of gas near accreting supermassive black holes is an observational hallmark of quasars. Observations of broad emissi…

physics.med-ph2018

Monte Carlo simulation of 192Ir radioactive source in a phantom designed for brachytherapy dosimetry and source position evaluation

Samuel Chiquita

In this report simulations of 192Ir source located inside a phantom designed for measuring the absorbed dose and radioactive source position are presented. Monte Carlo simulations…

astro-ph.IM2018★ 72 cited

ACTIN: A tool to calculate stellar activity indices

J. Gomes da Silva, P. Figueira, N. C. Santos +1

Magnetic activity in the atmospheres of stars produces a number of spectroscopic signatures that are visible in the shape and strength of spectral lines. These signatures can be us…

astro-ph.IM2018★ 33 cited

Telluric correction in the near-infrared: Standard star or synthetic transmission?

S. Ulmer-Moll, P. Figueira, J. J. Neal +2

Context. The atmospheric absorption of the Earth is an important limiting factor for ground-based spectroscopic observations and the near-infrared and infrared regions are the most…

astro-ph.SR2018★ 18 cited

Dynamics of wind and the dusty environments in the accreting T Tauri stars RY Tau and SU Aur

P. P. Petrov, K. N. Grankin, J. F. Gameiro +10

Classical T Tauri stars with ages of less than 10 Myr possess accretion discs. Magnetohydrodynamic processes at the boundary between the disc and the stellar magnetosphere control…

astro-ph.IM2018★ 26 cited

Estimation of atmospheric turbulence parameters from Shack-Hartmann wavefront sensor measurements

Paulo P. Andrade, Paulo J. V. Garcia, Carlos M. Correia +2

The estimation of atmospheric turbulence parameters is of relevance for: a) site evaluation & characterisation; b) prediction of the point spread function; c) live assessment of er…

astro-ph.EP2018★ 15 cited

The GAPS Programme with HARPS-N at TNG XVIII. Two new giant planets around the metal-poor stars HD 220197 and HD 233832

D. Barbato, A. Sozzetti, K. Biazzo +40

Statistical studies of exoplanets have shown that giant planets are more commonly hosted by metal-rich dwarf stars than low-metallicity ones, while such a correlation is not eviden…

astro-ph.EP2018★ 67 cited

Machine-learning Approaches to Exoplanet Transit Detection and Candidate Validation in Wide-field Ground-based Surveys

N. Schanche, A. Collier Cameron, G. Hébrard +23

Since the start of the Wide Angle Search for Planets (WASP) program, more than 160 transiting exoplanets have been discovered in the WASP data. In the past, possible transit-like e…

astro-ph.GA2018★ 12 cited

Global Correlations Between the Radio Continuum, Infrared and CO Emission in Dwarf Galaxies

Mercedes E. Filho, Fatemeh S. Tabatabaei, Jorge Sanchez Almeida +2

Correlations between the radio continuum, infrared and CO emission are known to exist for several types of galaxies and across several orders of magnitude. However, the low-mass, l…

astro-ph.GA2018★ 76 cited

Probing accretion of ambient cloud material into the Taurus B211/B213 filament

Y. Shimajiri, Ph. Andre, P. Palmeirim +5

Herschel observations have emphasized the role of molecular filaments in star formation. However, the origin and evolution of these filaments are not yet well understood, partly be…