2.5k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of CambridgeGB680 papers
- Russian Academy of SciencesRU572 papers
- KU LeuvenBE531 papers
- Centre National de la Recherche ScientifiqueFR460 papers
- Max Planck Institute for AstronomyDE316 papers
- Sorbonne UniversitéFR214 papers
- European Southern ObservatoryCL203 papers
- Université Paris CitéFR200 papers
- Instituto de Astrofísica de CanariasES184 papers
- Center for Astrophysics Harvard & SmithsonianUS181 papers
- Leiden UniversityNL162 papers
- Heidelberg UniversityDE161 papers
46 papers · 1 filter
Pulsations in the atmosphere of the roAp star HD 24712 II. Theoretical models
Hideyuki Saio, Tanya Ryabchikova, Mikhail Sachkov
We discuss pulsations of the rapidly oscillating Ap (roAp) star HD 24712 (HR 1217) based on nonadiabatic analyses taking into account the effect of dipole magnetic fields. We have…
A delta Scuti star in the post-MS contraction phase: 44 Tauri
P. Lenz, A. A. Pamyatnykh, T. Zdravkov +1
The evolutionary stage of the delta Scuti star 44 Tau has been unclear. Recent asteroseismic studies have claimed models on the main sequence, as well as in the expansion phase of…
The chemical composition of TS 01, the most oxygen-deficient planetary nebula. AGB nucleosynthesis in a metal-poor binary star
G. Stasinska, C. Morisset, G. Tovmassian +10
The planetary nebula TS 01 (also called PN G 135.9+55.9 or SBS 1150+599A), with its record-holding low oxygen abundance and its double degenerate close binary core (period 3.9 h),…
Magnetic Doppler imaging of the roAp star HD 24712
T. Lüftinger, O. Kochukhov, T. Ryabchikova +3
We present the first magnetic Doppler images of a rapidly oscillating Ap (roAp) star. We deduce information about magnetic field geometry and abundance distributions of a number of…
Fe I/Fe II ionization equilibrium in cool stars: NLTE versus LTE
Lyudmila Mashonkina, Thomas Gehren, Jianrong Shi +2
Non-local thermodynamic equilibrium (NLTE) line formation for neutral and singly-ionized iron is considered through a range of stellar parameters characteristic of cool stars. A co…
Why Simple Stellar Population models do not reproduce the colours of Galactic open clusters
A. E. Piskunov, N. V. Kharchenko, E. Schilbach +3
(...) We search for an explanation of the disagreement between the observed integrated colours of 650 local Galactic clusters and the theoretical colours of present-day SSP models.…
Time-resolved photometric and spectroscopic analysis of a luminous Ap star HD103498
S. Joshi, T. Ryabchikova, O. Kochukhov +4
We present the results on the photometric and spectroscopic monitoring of a luminous Ap star HD103498. The time-series photometric observations were carried out on 17 nights using…
The chemical composition of donors in AM CVn stars and ultra-compact X-ray binaries: observational tests of their formation
G. Nelemans, L. R. Yungelson, M. V. van der Sluys +1
We study the formation of ultra-compact binaries (AM CVn stars and ultra-compact X-ray binaries) with emphasis on the surface chemical abundances of the donors in these systems. Hy…
A Mechanism for the Oxygen and Iron Bimodal Radial Distribution Formation in the Disc of our Galaxy
I. A. Acharova, J. R. D. Lépine, Yu. N. Mishurov +3
Recently it has been proposed that there are two types of SN Ia progenitors -- short-lived and long-lived. On the basis of this idea, we develope a theory of a unified mechanism fo…
High mass of the type IIP supernova 2004et inferred from hydrodynamic modeling
V. P. Utrobin, N. N. Chugai
Previous studies of type IIP supernovae have inferred that progenitor masses recovered from hydrodynamic models are higher than 15 Msun. To verify the progenitor mass of this super…
Circumstellar interaction in type Ibn supernovae and SN 2006jc
N. N. Chugai
I analyse peculiar properties of light curve and continua of enigmatic Ibn supernovae, including SN 2006jc, and argue in favour of the early strong circumstellar interaction. This…
The High-Metallicity Explosion Environment of the Relativistic Supernova 2009bb
E. M. Levesque, A. M. Soderberg, R. J. Foley +23
We investigate the environment of the nearby (d ~ 40Mpc) broad-lined Type Ic supernova SN 2009bb. This event was observed to produce a relativistic outflow likely powered by a cent…
A Relativistic Type Ibc Supernova Without a Detected Gamma-ray Burst
A. M. Soderberg, S. Chakraborti, G. Pignata +21
Long duration gamma-ray bursts (GRBs) mark the explosive death of some massive stars and are a rare sub-class of Type Ibc supernovae (SNe Ibc). They are distinguished by the produc…
Statistical equilibrium of silicon in the atmospheres of metal-poor stars
J. R. Shi, T. Gehren, L. Mashonkina +1
Aims. The statistical equilibrium of neutral and ionized silicon in the atmospheres of metal-poor stars is discussed. Non-local thermodynamic equilibrium effects are investigated a…
Scale Length of Disk Galaxies
Kambiz Fathi, Mark Allen, Eduardo Gonzalez-Solares +2
As a part of a Euro-VO research initiative, we have undertaken a programme aimed at studying the scale length of 54909 Sa-Sd spiral galaxies from the SDSS DR6 catalogue. We have re…
The chemical abundance analysis of normal early A- and late B-type stars
L. Fossati, T. Ryabchikova, S. Bagnulo +4
Modern spectroscopy of early-type stars often aims at studying complex physical phenomena. Comparatively less attention is paid to identifying and studying the "normal" A- and B-ty…
Modeling of Protostellar Clouds and their Observational Properties
A. G. Zhilkin, Ya. N. Pavlyuchenkov, S. N. Zamozdra
A physical model and two-dimensional numerical method for computing the evolution and spectra of protostellar clouds are described. The physical model is based on a system of magne…
The History of the Solar System's Debris Disc: Observable Properties of the Kuiper Belt
Mark Booth, Mark C. Wyatt, Alessandro Morbidelli +2
The Nice model of Gomes et al. (2005) suggests that the migration of the giant planets caused a planetesimal clearing event which led to the Late Heavy Bombardment (LHB) at 880 Myr…
Abundant Circumstellar Silica Dust and SiO Gas Created by a Giant Hypervelocity Collision in the ~12 Myr HD172555 System
C. M. Lisse, C. H. Chen, M. C. Wyatt +4
The fine dust detected by IR emission around the nearby Beta Pic analogue star HD172555 is very peculiar. The dust mineralogy is composed primarily of highly refractory, non-equili…
Instability of LBV-stars against radial oscillations
Yu. A. Fadeyev
In this study we consider the nonlinear radial oscillations exciting in LBV--stars with effective temperatures 1.5e4 K <= Teff <= 3e4 K, bolometric luminosities 1.2e6 L_odot <= L <…
Improved fundamental parameters and LTE abundances of the CoRoT solar-type pulsator HD49933
T. Ryabchikova, L. Fossati, D. Shulyak
The knowledge of accurate stellar parameters is a key stone in several fields of stellar astrophysics, such as asteroseismology and stellar evolution. Although the parameters can b…
Asteroseismology of hybrid pulsators made possible: simultaneous MOST space photometry and ground-based spectroscopy of Gamma Peg
G. Handler
We have acquired simultaneous high-precision space photometry and radial velocities of the bright hybrid Beta Cep/SPB pulsator Gamma Peg. Frequency analyses reveal the presence of…
Brane Inflation and the Overshoot Problem
Simeon Bird, Hiranya V. Peiris, Daniel Baumann
We investigate recent claims that brane inflation solves the overshoot problem through a combination of microphysical restrictions on the phase space of initial conditions and the…
Growing the first bright quasars in cosmological simulations of structure formation
Debora Sijacki, Volker Springel, Martin G. Haehnelt
We employ cosmological hydrodynamical simulations to study the growth of massive black holes (BHs) at high redshifts subject to BH merger recoils from gravitational wave emission.…