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Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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281 papers · 1 filter
XMM-Newton and VLT observations of the isolated neutron star 1E 1207.4-5209
A. De Luca, S. Mereghetti, P. A. Caraveo +3
In August 2002, XMM-Newton devoted two full orbits to the observation of 1E 1207.4-5209, making this isolated neutron star the most deeply scrutinized galactic target of the missio…
ACS Observations of a Strongly Lensed Arc in a Field Elliptical
J. P. Blakeslee, K. C. Zekser, N. Benitez +15
We report the discovery of a strongly lensed arc system around a field elliptical galaxy in Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS) images of a parallel fiel…
On The Hydrogen Emission From The Type Ia Supernova 2002ic
Lifan Wang, Dietrich Baade, Peter Hoeflich +3
The discovery of SN 2002ic and subsequent spectroscopic studies have led to the surprising finding that SN 2002ic is a Type Ia supernova with strong ejecta-circumstellar interactio…
Scaling laws in X-ray Galaxy Clusters at redshift between 0.4 and 1.3
S. Ettori, P. Tozzi, S. Borgani +1
(Abriged) We present a study of the integrated physical properties of a sample of 28 X-ray galaxy clusters observed with Chandra at redshift between 0.4 and 1.3. In particular, we…
Dust and Super Star Clusters in NGC 5253
Leonardo Vanzi, Marc Sauvage
We present new observations of the famous starburst galaxy NGC 5253 which owes its celebrity to possibly being the youngest and closest starburst galaxy known. Our observations in…
Keck Spectroscopy and Imaging of Globular Clusters in the Lenticular Galaxy NGC 524
Michael A. Beasley, Duncan A. Forbes, Jean P. Brodie +1
We have obtained Keck LRIS imaging and spectra for 29 globular clusters associated with the lenticular galaxy NGC 524. Using the empirical calibration of Brodie & Huchra we find th…
The Structure and Environment of Young Stellar Clusters in Spiral Galaxies
Soeren S. Larsen
A search for stellar clusters has been carried out in 18 nearby spiral galaxies, using HST/WFPC2 archive images. All of the galaxies have previously been imaged from the ground in…
The Millennium Galaxy Catalogue: The photometric accuracy, completeness and contamination of the 2dFGRS and SDSS-EDR & DR1 datasets
N. J. G. Cross, S. P. Driver, J. Liske +5
The Millennium Galaxy Catalogue (MGC) is a deep ( mag arcsec), wide field CCD imaging survey, covering 37.5deg and is completely contained within the 2…
On the reliability of the black hole mass and mass to light ratio determinations with Schwarzschild models
N. Cretton, E. Emsellem
In this Letter, we investigate the claim of Valluri et al. (2003), namely that the use of Schwarzschild dynamical (orbit-based) models leads to an indeterminacy regarding the estim…
Minor-axis velocity gradients in disk galaxies
L. Coccato, E. M. Corsini, A. Pizzella +3
We present the ionized-gas kinematics and photometry of a sample of 4 spiral galaxies which are characterized by a zero-velocity plateau along the major axis and a velocity gradien…
Magnetic topology and surface differential rotation on the K1 subgiant of the RS CVn system HR 1099
P. Petit, J. -F. Donati, G. A. Wade +8
We present here spectropolarimetric observations of the RS CVn system HR 1099 (V711 Tau) secured from 1998 February to 2002 January with the spectropolarimeter MuSiCoS at the Teles…
The cosmic evolution of quasar host galaxies
R. Falomo, J. K. Kotilainen, C. Pagani +2
We present near-infrared imaging of the host galaxies of 17 quasars in the redshift range 1 < z < 2, carried out at the ESO VLT UT1 8m telescope under excellent seeing conditions (…
The infrared L'-band view of the Galactic Center with NAOS-CONICA at VLT
Y. Clénet, D. Rouan, E. Gendron +9
We report on Galactic Center L'-band observations made during NAOS/CONICA Science Verification. Colors of the inner 2" stars reveal an infrared excess of S2, the closest star to th…
Cepheid distances from infrared long-baseline interferometry - I. VINCI/VLTI observations of seven Galactic Cepheids
P. Kervella, N. Nardetto, D. Bersier +2
We report the angular diameter measurements of seven classical Cepheids (X Sgr, eta Aql, W Sgr, zeta Gem, beta Dor, Y Oph and L Car) that we have obtained with the VINCI instrument…
A comprehensive set of elemental abundances in damped Ly-alpha systems: revealing the nature of these high-redshift galaxies
M. Dessauges-Zavadsky, F. Calura, J. X. Prochaska +2
By combining our UVES-VLT spectra of a sample of four damped Ly-alpha systems (DLAs) toward the quasars Q0100+13, Q1331+17, Q2231-00 and Q2343+12 with the existing HIRES-Keck spect…
Joint X-Ray and Optical Measurements of the Mass Distribution of the Distant Galaxy Cluster CLJ 0152.7-1357
Zhi-Ying Huo, Sui-Jian Xue, Haiguang Xu +2
We present joint X-ray and optical observations of the high redshift (z~0.83) lensing cluster CLJ0152.7-1357 made with the Chandra X-ray Observatory and the Keck telescope. We conf…
Hot Very Small dust Grains in NGC 1068 seen in jet induced structures thanks to VLT/NACO adaptive optics
Daniel Rouan, Francois Lacombe, Eric Gendron +12
We present K, L and M diffraction-limited images of NGC 1068 obtained with NAOS+CONICA at VLT/YEPUN over a 3.5" field around the central engine. Hot dust (Tcol = 550-650 K) is foun…
An unusual high-ionization nebula in NGC55
R. Tuellmann, M. R. Rosa
We report on the detection of a previously unknown extended low-density nebula of very high temperature and excitation, TR001507.7-391206, located above the midplane of NGC55. The…
Photometric redshifts with the Multilayer Perceptron Neural Network: application to the HDF-S and SDSS
E. Vanzella, S. Cristiani, A. Fontana +8
We present a technique for the estimation of photometric redshifts based on feed-forward neural networks. The Multilayer Perceptron (MLP) Artificial Neural Network is used to predi…
The Chandra Deep Field South: Optical Spectroscopy I
G. P. Szokoly, J. Bergeron, G. Hasinger +15
We present the results of our spectroscopic follow-up program of the X-ray sources detected in the 942 ks exposure of the Chandra Deep Field South (CDFS). 288 possible counterparts…
Redshifted 21 cm Emission From the Pre-Reionization Era I. Mean Signal and Linear Fluctuations
Nickolay Y. Gnedin, Peter A. Shaver
We use cosmological simulations of reionization to predict the possible signal from the redshifted 21 cm line of neutral hydrogen in the pre-reionization era and to investigate the…
A Medium-Resolution Near-Infrared Spectral Library of Late Type Stars: I
Valentin D. Ivanov, Marcia J. Rieke, Charles W. Engelbracht +3
We present an empirical infrared spectral library of medium resolution (R~2000-3000) H (1.6 micron) and K (2.2 micron) band spectra of 218 red stars, spanning a range of [Fe/H] fro…
Adiabatic relativistic models for the jets in the radio galaxy 3C 31
R. A. Laing, A. H. Bridle
We present a general approach to the modelling of the brightness and polarization structures of adiabatic, decelerating relativistic jets, based on the formalism of Matthews & Sche…
Near infrared imaging of NGC2316
P. S Teixeira, S. R. Fernandes, J. F. Alves +4
In the present paper we present JHK photometric results of the young embedded cluster NGC 2316. We construct the cluster radial profile from which we determine a radius of 0.63 pc.…