19.6k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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339 papers · 1 filter
NGC 6791: an exotic open cluster or the nucleus of a tidally disrupted galaxy?
Giovanni Carraro, Sandro Villanova, Pierre Demarque +3
We report on high resolution Echelle spectroscopy of 20 giant stars in the Galactic old open clusters NGC 6791 obtained with Hydra at the WIYN telescope. High precision radial velo…
Reflections on Reflexions: II. Effects of Light Echoes on the luminosity and spectra of Type Ia Supernovae
F. Patat, S. Benetti, E. Cappellaro +1
In this paper we present and discuss the effects of scattered light echoes (LE) on the luminosity and spectral appearance of Type Ia Supernovae (SNe). After introducing the basic c…
Resolving the disk rotation of HD 97048 and HD 100546 in the [O I] 6300A line: evidence for a giant planet orbiting HD 100546
B. Acke, M. E. van den Ancker
Aims. We intend to spatially and spectrally resolve the [O I] emission region in two nearby Herbig stars. Methods. We present high-resolution (R = 80,000) VLT/UVES echelle spectra…
Integrated optics for astronomical interferometry - VI. Coupling the light of the VLTI in K band
Jean-Baptiste Le Bouquin, Pierre Labeye, Fabien Malbet +8
Our objective is to prove that integrated optics (IO) is not only a good concept for astronomical interferometry but also a working technique with high performance. We used the com…
Adaptive Optics Concept For Multi-Objects 3D Spectroscopy on ELTs
B. Neichel, T. Fusco, M. Puech +7
In this paper, we present a first comparison of different Adaptive Optics (AO) concepts to reach a given scientific specification for 3D spectroscopy on Extremely Large Telescope (…
AO Velorum: a young quadruple system with a ZAMS eclipsing BpSi primary
J. F. Gonzalez, S. Hubrig, N. Nesvacil +1
Using recent spectroscopic observations, we show that the triple system AO Vel with an eclipsing BpSi primary is in fact a remarkable quadruple system formed by two double-lined sp…
VOFilter, Bridging Virtual Observatory and Industrial Office Applications
Chen-zhou Cui, Markus Dolensky, Peter Quinn +2
VOFilter is an XML based filter developed by the Chinese Virtual Observatory project to transform tabular data files from VOTable format into OpenDocument format. VOTable is an XML…
Spectroscopic metallicities for Fornax UCDs, GCs and dE,Ns
S. Mieske, M. Hilker, L. Infante +1
Various formation channels for the puzzling ultra-compact dwarf galaxies (UCDs) have been proposed in the last few years. To better judge on some of the competing scenarios, we pre…
Dwarf elliptical galaxies in Centaurus A group: stellar populations in AM 1339-445 and AM 1343-452
M. Rejkuba, G. S. Da Costa, H. Jerjen +2
We study the red giant populations of two dE galaxies, AM 1339-445 and AM 1343-452, with the aim of investigating the number and luminosity of any upper asymptotic giant branch (AG…
The evolution of Radio Loud Quasar host galaxies: AO observations at z = 3
R. Falomo, J. K. Kotilainen, R. Scarpa +2
We report on ESO--VLT adaptive optics imaging of one radio-loud quasar at z 3. In spite of the large distance of the object we are able to detect its surrounding extended ne…
HD 178892 - a cool Ap star with extremely strong magnetic field
T. Ryabchikova, O. Kochukhov, D. Kudryavtsev +6
We report a discovery of the Zeeman resolved spectral lines, corresponding to the extremely large magnetic field modulus <Bs>=17.5 kG, in the cool Ap star HD 178892. The mean longi…
Li and Be depletion in metal-poor subgiants
A. E. García Pérez, F. Primas
A sample of metal-poor subgiants has been observed with the UVES spectrograph at the Very Large Telescope and abundances of Li and Be have been determined. Typical signal-to-noise…
Oxygen abundances in metal-poor subgiants as determined from [O I], O I and OH lines
A. E. García Pérez, M. Asplund, F. Primas +2
The debate on the oxygen abundances of metal-poor stars has its origin in contradictory results obtained using different abundance indicators. To achieve a better understanding of…
Most precise single redshift bound to the variability of the fine-structure constant
S. A. Levshakov, M. Centurion, P. Molaro +4
Verification of theoretical predictions of an oscillating behavior of the fine-structure constant, alpha, with cosmic time requires high precision measurements at individual redshi…
Probing the evolution of the near-IR luminosity function of galaxies to z ~ 3 in the Hubble Deep Field South
P. Saracco, A. Fiano, G. Chincarini +6
[Abridged] We present the rest-frame Js-band and Ks-band luminosity function of a sample of about 300 galaxies selected in the HDF-S at Ks<23 (Vega). We use calibrated photometric…
An Atlas of K-line Spectra for Cool Magnetic CP Stars: The Wing-Nib Anomaly (WNA)
C. R. Cowley, S. Hubrig, I. Kamp
We present a short atlas illustrating the unusual Ca {\sc ii} K-line profiles in upper main sequence stars with anomalous abundances. Slopes of the profiles for 10 cool, magnetic c…
Multiplicity of very low-mass objects in the Upper Scorpius OB association: a possible wide binary population
H. Bouy, E. L. Martin, W. Brandner +5
We report the initial results of a VLT/NACO high spatial resolution imaging survey for multiple systems among 58 M-type members of the nearby Upper Scorpius OB association. Nine pa…
Extrasolar Planets with AMBER/VLTI, What can we expect from current performances ?
Florentin Millour, Martin Vannier, R. G. Petrov +2
We present the current performances of the AMBER / VLTI instrument in terms of differential observables (differential phase and differential visibility) and show that we are alread…
Kinematics and star formation activity in the z=2.03954 damped Lyman-alpha system towards PKS 0458-020
Janine Heinmueller, Patrick Petitjean, Cedric Ledoux +2
We present UVES observations of the log N(HI)= 21.7 damped Lyman-alpha system at z=2.03954 towards the quasar PKS 0458-020. HI Lyman-alpha emission is detected in the center of the…
The age of the main population of the Sagittarius dwarf spheroidal galaxy. Solving the "M giant conundrum"
M. Bellazzini, M. Correnti, F. R. Ferraro +2
We present a statistically decontaminated Color Magnitude Diagram of a 1 deg X 1 deg field in the core of the Sagittarius dSph galaxy. Coupling this CMD with the most recent metall…
Hydrogen and helium traces in type Ib-c supernovae
A. Elmhamdi, I. J. Danziger, D. Branch +3
The spectroscopic properties of a selected optical photospheric spectra of core collapse supernovae (CCSNe) are investigated.Special attention is devoted to traces of hydrogen at e…
Multi-wavelength study of the gravitational lens system RXS J113155.4-123155: I. Multi-epoch optical and near infrared imaging
D. Sluse, J. -F. Claeskens, B. Altieri +6
(abridged) Aims: RXS J113155.4-123155 (z=0.66) is a quadruply imaged lensed quasar with a resolved Einstein Ring. The goal of this paper is to provide a full characterization of th…
A Lyman-alpha blob in the GOODS South field: evidence for cold accretion onto a dark matter halo
Kim Nilsson, Johan P. U. Fynbo, Palle Moller +2
We report on the discovery of a z = 3.16 Lyman-alpha emitting blob in the GOODS South field. The blob has a total Ly-alpha luminosity of ~ 10^(43) erg s^(-1) and a diameter larger…
The design and performance of the Gaia photometric system
C. Jordi, E. Hoeg, A. G. A. Brown +32
The European Gaia astrometry mission is due for launch in 2011. Gaia will rely on the proven principles of ESA's Hipparcos mission to create an all-sky survey of about one billion…