Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR3.5k papers
- National Institute for AstrophysicsIT1.8k papers
- Max Planck Institute for AstronomyDE1.8k papers
- Max Planck Institute for Extraterrestrial PhysicsDE1.5k papers
- California Institute of TechnologyUS1.5k papers
- Space Telescope Science InstituteUS1.5k papers
- Leiden UniversityNL1.4k papers
- Center for Astrophysics Harvard & SmithsonianUS1.3k papers
- Osservatorio Astronomico di PadovaIT1.3k papers
- University of CambridgeGB1.2k papers
- Observatoire de ParisFR1.2k papers
- Instituto de Astrofísica de CanariasES1.2k papers
65 papers · 1 filter
Proper Motions and Variability of the H Emission in the HH~46/47system
Milena Micono, Christopher J. Davis, Thomas P. Ray +2
We report here on the first proper motion measurements of molecular hydrogen emission features in the Herbig-Haro 46/47 outflow. Assuming a distance of 350 pc to this flow, the inf…
Discovery of a Supernova Explosion at Half the Age of the Universe and its Cosmological Implications
S. Perlmutter, G. Aldering, M. Della Valle +20
The ultimate fate of the universe, infinite expansion or a big crunch, can be determined by measuring the redshifts, apparent brightnesses, and intrinsic luminosities of very dista…
Performance of the CFHT Adaptive Optics Bonnette
F. Rigaut, D. Salmon, R. Arsenault +10
Extensive results from the commissioning phase of PUEO, the adaptive optics instrument adaptor for the Canada-France-Hawaii telescope, are presented and discussed. Analyses of more…
The Deuterium Abundance Towards Q1937-1009
Scott Burles, David Tytler
We present a new measurement of the deuterium-to-hydrogen ratio (D/H) in the Lyman limit absorption system at towards Q1937--1009. We use an improved method to measure…
What Powers Ultra-luminous IRAS Galaxies?
R. Genzel, D. Lutz, E. Sturm +9
We present an ISO SWS and ISOPHOT-S, mid-infrared spectroscopic survey of 15 ultra-luminous IRAS galaxies. We combine the survey results with a detailed case study, based on near-I…
Tidal dwarf galaxies
Pierre-Alain Duc, Felix Mirabel
We review the observational evidences for tidal dwarf galaxies, a class of small galaxies formed out of the tidal debris of collisions between massive galaxies. Tidal dwarfs are fo…
Evolution of Massive Stars under New Mass-Loss Rates for RSG: Is the mystery of the missing blue gap solved ?
B. Salasnich, A. Bressan, C. Chiosi
In this paper we present new models of massive stars based on recent advancements in the theory of diffusive mixing and a new empirical formulation of the mass-loss rates of red su…
Understanding the Cool DA White Dwarf, G29-38
S. J. Kleinman, R. E. Nather, D. E. Winget +37
The white dwarfs are promising laboratories for the study of cosmochronology and stellar evolution. Through observations of the pulsating white dwarfs, we can measure their interna…
TP-AGB stars with envelope burning
P. Marigo, A. Bressan, C. Chiosi
In this paper we focus on the TP-AGB evolution of intermediate-mass stars experiencing envelope burning (M=4-5Mo). The approach we have adopted is a semi-analytical one as it combi…
Seeking the Local Convergence Depth. II. TF Observations of the Clusters A114, A119, A194, A2295, A2457, A2806, A3193, A3381, AND A3744
Daniel A. Dale, Riccardo Giovanelli, Martha P. Haynes +3
We present Tully-Fisher (TF) observations for nine rich Abell clusters of galaxies. This is the second such data installment of an all-sky survey of 50 clusters in the redshift ran…
Search and analysis of small scale structures in two X-ray clusters of galaxies
D. Lazzati, S. Campana, P. Rosati +2
We present a refinement of the wavelet analysis technique for the detection and characterisation of small scale features embedded in a strongly varying background. This technique h…
The ROSAT Deep Cluster Survey: the X-ray Luminosity Function out to z=0.8
P. Rosati, R. Della Ceca, C. Norman +1
We present the X-ray Luminosity Function (XLF) of the ROSAT Deep Cluster Survey (RDCS) sample over the redshift range 0.05-0.8. Our results are derived from a complete flux-limited…
The UV Background and the Lyman alpha Clouds at High Redshift
E. Giallongo, S. Cristiani, S. D'Odorico +2
The estimate of the ionizing UV background through the proximity effect analysis is discussed. Taking into account the correct bending of the column density distribution which appe…
Cepheid Period-Radius and Period-Luminosity Relations and the Distance to the LMC
Wolfgang P. Gieren, Pascal Fouque, Matias Gomez
We have used the infrared Barnes-Evans surface brightness technique to derive the radii and distances of 34 Galactic Cepheid variables. Radius and distance results obtained from bo…
Laser Guide Star for 3.6m and 8m telescopes: Performances and astrophysical implications
M. Le Louarn, R. Foy, N. Hubin +1
We have constructed an analytical model to simulate the behavior of an adaptive optics system coupled with a sodium laser guide star. The code is applied to a 3.6-m and 8m class te…
Constraints on Cosmological Models from Hubble Space Telescope Observations of High-z Supernovae
P. M. Garnavich, R. P. Kirshner, P. Challis +17
We have coordinated Hubble Space Telescope photometry with ground-based discovery for three supernovae: two SN Ia near z~0.5 (SN 1997ce, SN 1997cj) and a third event at z=0.97 (SN…
The Radio-Optical Correlation in Steep-Spectrum Quasars
Stephen Serjeant, Steve Rawlings, Stephen J. Maddox +4
Using complete samples of steep-spectrum quasars, we present evidence for a correlation between radio and optical luminosity which is not caused by selection effects, nor caused by…
Radial Velocities of Globular Clusters in the Giant Elliptical Galaxy NGC 1399
Dante Minniti, Markus Kissler-Patig, Paul Goudfrooij +1
We report on the radial velocity measurements of 18 globular clusters and one dE galaxy in the field of the giant elliptical galaxy NGC 1399, the dominant galaxy of the Fornax clus…
A new optical reddening model for the Solar neighborhood: Galactic Structure through low-latitude starcounts from the Guide Star Catalogue
R. A. Mendez, W. F. van Altena
A new optical reddening model for the Solar neighborhood is presented. The model makes use of the large-scale properties of the dust layer in the Galaxy, and of the observed clumpi…
Neutral sodium from comet Hale-Bopp: a third type of tail
G. Cremonese, H. Boehnhardt, J. Crovisier +7
We report on the discovery and analysis of a striking neutral sodium gas tail associated with comet C/1995 O1 Hale-Bopp. Sodium D-line emission has been observed at heliocentric di…
Ages and Metallicities in Elliptical Galaxies from the H_beta, <Fe>, and Mg2 Diagnostics
R. Tantalo, C. Chiosi, A. Bressan
Systematic variations in the line strength indices H_beta, Mg2, and <Fe> are observed across elliptical galaxies and from one object to another. Furthermore arguments are given for…
Spectro-Photometric Evolution of Elliptical Galaxies. III. Infall models with gradients in mass and star formation
R. Tantalo, C. Chiosi, A. Bressan +2
In this study we present a simple model of elliptical galaxies aimed at interpreting the gradients in colours and narrow band indices observed across these systems. Salient feature…
The ROSAT Deep Survey II. Optical identification, photomettry and spectra of sources in the Lockman field
Maarten Schmidt, Guenther Hasinger, James Gunn +7
The ROSAT Deep Survey includes a complete sample of 50 X-ray sources with fluxes in the keV band larger than 5.5 erg cm s in the Lockman field (H…
The ROSAT Deep Survey I. X-ray sources in the Lockman Field
Guenther Hasinger, Richard Burg, Riccardo Giacconi +3
The ROSAT Deep Survey in the Lockman Hole is the most sensitive X-ray survey performed to date, encompassing an exposure time of 207 ksec with the PSPC and a total of 1.32 Msec wit…