399 citations · 1.3k across the 30 of their papers we have counts for
30 papers
ArtHOI: Taming Foundation Models for Monocular 4D Reconstruction of Hand-Articulated-Object Interactions
Zikai Wang, Zhilu Zhang, Yiqing Wang +2
Existing hand-object interactions (HOI) methods are largely limited to rigid objects, while 4D reconstruction methods of articulated objects generally require pre-scanning the obje…
Quantitative comparison of opacities calculated using the -matrix and Distorted-Wave methods: Fe XVII
F. Delahaye, C. P. Connor, R. T. Smith +1
We present here a detailed calculation of opacities for Fe~XVII at the physical conditions corresponding to the base of the Solar convection zone. Many ingredients are involved in…
New insight on Young Stellar Objects accretion shocks -- a claim for NLTE opacities
Lionel de Sá, Jean-Pierre Chièze, Chantal Stehlé +3
Context. Accreted material onto CTTSs is expected to form a hot quasi-periodic plasma structure that radiates in X-rays. Simulations of this phenomenon only partly match with obser…
A Quantitative Comparison of Opacities Calculated Using the Distorted- Wave and -Matrix Methods
F. Delahaye, N. R. Badnell, C. P. Ballance +7
The present debate on the reliability of astrophysical opacities has reached a new climax with the recent measurements of Fe opacities on the Z-machine at the Sandia National Labor…
IPOPv2 online service for the generation of opacity tables
F. Delahaye, C-M. Zwolf, C. Zeippen +1
In the framework of the present phase -- IPOPv2 -- of the international Opacity Project (OP), a new web service has been implemented based on the latest release of the OP opacities…
Ipopv2: Photoionization of Ni XIV -- a test case
F. Delahaye, P. Palmeri, P. Quinet +1
Several years ago, M. Asplund and coauthors (2004) proposed a revision of the Solar composition. The use of this new prescription for Solar abundances in standard stellar models ge…
The chemical composition of the Sun from helioseismic and solar neutrino data
F. L. Villante, A. M. Serenelli, F. Delahaye +1
We perform a quantitative analysis of the solar composition problem by using a statistical approach that allows us to combine the information provided by helioseimic and solar neut…
Simulations of protostellar collapse using multigroup radiation hydrodynamics. II. The second collapse
N. Vaytet, G. Chabrier, E. Audit +4
Star formation begins with the gravitational collapse of a dense core inside a molecular cloud. As the collapse progresses, the centre of the core begins to heat up as it becomes o…
Comparison of Fe and Ni opacity calculations for a better understanding of pulsating stellar envelopes
D. Gilles, S. Turck-Chièze, G. Loisel +19
Opacity is an important ingredient of the evolution of stars. The calculation of opacity coefficients is complicated by the fact that the plasma contains partially ionized heavy io…
On plasma radiative properties in stellar conditions
S. Turck-Chièze, F. Delahaye, D. Gilles +2
The knowledge of stellar evolution is evolving quickly thanks to an increased number of opportunities to scrutinize the stellar internal plasma properties by stellar seismology and…
Iron and Nickel spectral opacity calculations in conditions relevant for pulsating stellar envelopes and experiments
D. Gilles, S. Turck-Chièze, M. Busquet +18
Seismology of stars is strongly developing. To address this question we have formed an international collaboration OPAC to perform specific experimental measurements, compare opaci…
How to Make an Atomic Blog in Your Own Kitchen. Summary of the Workshop: Uncertainties in Atomic Data and How They Propagate in Chemical Abundances
Valentina Luridiana, Jorge García-Rojas, Kanti Aggarwal +12
This workshop brought together scientists (including atomic physicists, theoretical astrophysicists and astronomers) concerned with the completeness and accuracy of atomic data for…
A numerical model for multigroup radiation hydrodynamics
N. M. H. Vaytet, E. Audit, B. Dubroca +1
We present in this paper a multigroup model for radiation hydrodynamics to account for variations of the gas opacity as a function of frequency. The entropy closure model (M1) is a…
Theoretical and experimental activities on opacities for a good interpretation of seismic stellar probes
S Turck-Chièze, G Loisel, D Gilles +23
Opacity calculations are basic ingredients of stellar modelling. They play a crucial role in the interpretation of acoustic modes detected by SoHO, COROT and KEPLER. In this review…
Radiative properties of stellar plasmas and open challenges
S. Turck-Chièze, G. Loisel, D. Gilles +24
The lifetime of solar-like stars, the envelope structure of more massive stars, and stellar acoustic frequencies largely depend on the radiative properties of the stellar plasma. U…
Helioseismic Constraints on the Solar Ne/O Ratio and Heavy Element Abundances
F. Delahaye, M. H. Pinsonneault, L. Pinsonneault +1
We examine the constraints imposed by helioseismic data on the solar heavy element abundances. In prior work we argued that the measured depth of the surface convection zone R_CZ a…
Metallicity Mapping with gri Photometry: The Virgo Overdensity and the Halos of the Galaxy
Timothy C. Beers, Deokkeun An, Jennifer A. Johnson +7
We describe the methodology required for estimation of photometric estimates of metallicity based on the SDSS gri passbands, which can be used to probe the properties of main-seque…
A Photometric Metallicity Estimate of the Virgo Stellar Overdensity
Deokkeun An, Jennifer A. Johnson, Timothy C. Beers +6
We determine photometric metal abundance estimates for individual main-sequence stars in the Virgo Overdensity (VOD), which covers almost 1000 deg^2 on the sky, based on a calibrat…
Galactic Globular and Open Clusters in the Sloan Digital Sky Survey. II. Test of Theoretical Stellar Isochrones
Deokkeun An, Marc H. Pinsonneault, Thomas Masseron +6
We perform an extensive test of theoretical stellar models for main-sequence stars in ugriz, using cluster fiducial sequences obtained in the previous paper of this series. We gene…
OPserver: interactive online-computations of opacities and radiative accelerations
C. Mendoza, M. J. Seaton, P. Buerger +8
Codes to compute mean opacities and radiative accelerations for arbitrary chemical mixtures using the Opacity Project recently revised data have been restructured in a client--serv…
The Solar Heavy Element Abundances: II. Constraints from Stellar Atmospheres
M. H. Pinsonneault, Franck Delahaye
Estimates of the bulk metal abundance of the Sun derived from the latest generation of model atmospheres are significantly lower than the earlier standard values. In Paper I we dem…
Electron impact excitation of Helium-like ions up to n=4 levels including radiation damping
Franck Delahaye, Anil K. Pradhan, Claude J. Zeippen
Helium-like ions provide the most important X-ray spectral diagnostics in high temperature fusion and astrophysical plasmas. We previously presented computed collision strengths fo…
The Solar Heavy Element Abundances: I. Constraints from Stellar Interiors
Franck Delahaye, Marc Pinsonneault
The latest solar atmosphere models include non-LTE corrections and 3D hydrodynamic convection simulations. These models predict a significant reduction in the solar metal abundance…
Comparison of radiative accelerations obtained with atomic data from OP and OPAL
Franck Delahaye, Marc Pinsonneault
Here, we compare radiative accelerations (g_rad) derived from the new Opacity Project (OP) data with those computed from OPAL and some previous data from OP. For the case where we…