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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170 papers · 1 filter
The O-Na and Mg-Al Anticorrelations in Turn-Off and early Subgiants in Globular Clusters
R. G. Gratton, P. Bonifacio, A. Bragaglia +16
High dispersion spectra (R>40,000) for a quite large number of stars at the main sequence turn-off and at the base of the subgiant branch in NGC6397 and NGC6752 were obtained with…
The Cuspy LINER Nucleus of the S0/a Galaxy NGC 2681
Michele Cappellari, Francesco Bertola, David Burstein +3
The nucleus of the bulge-dominated, multiply-barred S0/a galaxy NGC 2681 is studied in detail, using high resolution Hubble Space Telescope FOC and NICMOS imaging and FOS spectrosc…
Why did Supernova 1054 shine at late times?
Jesper Sollerman, Cecilia Kozma, Peter Lundqvist
The Crab nebula is the remnant of supernova 1054 (SN 1054). The progenitor of this supernova has, based on nucleosynthesis arguments, been modeled as an 8-10 solar mass star. Here…
Tunable-filter imaging of quasar fields at z~1. I. A cluster around MRC B0450-221
Joanne C. Baker, Richard W. Hunstead, Malcolm N. Bremer +3
Using a combination of multicolour broad- and narrow-band imaging techniques and follow-up spectroscopy, we have detected an overdensity of galaxies in the field of quasar MRC B045…
The ROSAT-ESO Flux Limited X-Ray (REFLEX) Galaxy Cluster Survey I: The Construction of the Cluster Sample
H. Boehringer, P. Schuecker, L. Guzzo +10
We describe the construction of an X-ray flux-limited sample of galaxy clusters, the REFLEX survey catalogue, to be used for cosmological studies. The survey is based on the ROSAT…
Optical/Infrared Survey of Galaxy Clusters
Luiz da Costa, S. Arnouts, S. Bardelli +13
In this contribution the ongoing effort to build a statistical sample of clusters of galaxies over a wide range of redshifts to study the evolution of clusters and member galaxies…
The Intracluster Medium in z > 1 Galaxy Clusters
S. A. Stanford, B. Holden, P. Rosati +4
The Chandra X-ray Observatory was used to obtain a 190 ks image of three high redshift galaxy clusters in one observation. The results of our analysis of these data are reported fo…
The microwave background temperature at the redshift of 2.33771
R. Srianand, Patrick Petitjean, Cedric Ledoux
The Cosmic Microwave Background radiation is a fundamental prediction of Hot Big Bang cosmology. The temperature of its black-body spectrum has been measured at the present time, $…
Confirmation of the existence of coherent orientations of quasar polarization vectors on cosmological scales
D. Hutsemekers, H. Lamy
In order to verify the existence of coherent orientations of quasars polarization vectors on very large scales, we have obtained new polarization measurements for a sample of quasa…
MACHO 96-LMC-2: Lensing of a Binary Source in the LMC and Constraints on the Lensing Object
C. Alcock, R. A. Allsman, D. R. Alves +21
We present photometry and analysis of the microlensing alert MACHO 96-LMC-2. The ~3% photometry provided by the Global Microlensing Alert Network follow--up effort reveals a period…
The ROSAT-ESO Flux-Limited X-Ray (REFLEX) Galaxy Cluster Survey III: The Power Spectrum
Peter Schuecker, Hans Boehringer, Luigi Guzzo +11
We present a measure of the power spectrum on scales from 15 to 800 Mpc/h using the ROSAT-ESO Flux-Limited X-Ray(REFLEX) galaxy cluster catalogue. The REFLEX survey provides a samp…
The Core-Wing Anomaly of Cool Ap Stars: Abnormal Balmer Profiles
Charles R. Cowley, S. Hubrig, T. A. Ryabchikova +3
Paper by Cowley et al. The Core-Wing Anomaly Etc. The profiles of H in a number of cool Ap stars are anomalous. Broad wings, indicative of temperatures in the range 7000-8000K e…
The BMW (Brera-Multiscale-Wavelet) Catalogue of Serendipitous X-ray Sources
D. Lazzati, S. Campana, S. Covino +6
In collaboration with the Observatories of Palermo and Rome and the SAX-SDC we are constructing a multi-site interactive archive system featuring specific analysis tools. In this c…
Identification of the donor in GRS 1915+105
J. Greiner, M. J. McCaughrean, J. G. Cuby +2
We report on the results of medium-resolution spectroscopy of GRS 1915+105 in the H and K band using the 8m VLT at ESO. We clearly identify absorption bandheads from CO12 and CO13.…
Linking the Metallicity Distribution of Galactic Halo Stars to the Enrichment History of the Universe
Evan Scannapieco, Tom Broadhurst
We compare the metallicity distribution of Galactic Halo stars with 3D realizations of hierarchical galaxy formation. Outflows from dwarf galaxies enrich the intergalactic medium i…
The obscured mid-infrared continuum of NGC 4418: a dust- and ice-enshrouded AGN
H. W. W. Spoon, J. V. Keane, A. G. G. M. Tielens +2
We report the detection of absorption features in the 6-8 micron region superimposed on a featureless mid-infrared continuum in NGC 4418. For several of these features this is the…
MACHO Project Limits on Black Hole Dark Matter in the 1-30 Solar Mass Range
The Macho collaboration, C. Alcock, R. A. Allsman +22
We report on a search for long duration microlensing events towards the Large Magellanic Cloud. We find none, and therefore put limits on the contribution of high mass objects to t…
Molecular hydrogen abundance in the dust-free damped Ly-alpha galaxy at z = 3.4
S. A. Levshakov, P. Molaro, M. Centurion +3
New results from the search for H2 absorption in the damped Ly-alpha galaxy at redshift z = 3.4 toward QSO 0000-2620 (z_em = 4.1) are reported. The high-resolution (lambda/Delta la…
Molecular hydrogen and the nature of damped Lyman-alpha systems
Patrick Petitjean, R. Srianand, Cédric Ledoux
We report results from our mini-survey for molecular hydrogen in eight high redshift damped Lyman-alpha (DLA) systems using the ESO Ultra-violet and Visible Spectrograph on the VLT…
The LMC eclipsing binary HV 2274 revisited
M. A. T. Groenewegen, M. Salaris
We reanalyse the UV/optical spectrum and optical broad-band data of the eclipsing binary HV 2274 in the LMC, and derive its distance following the method given by Guinan et al. (19…
A search for possible interactions between ejections from GRS 1915+105 and the surrounding interstellar medium
S. Chaty, L. F. Rodriguez, I. F. Mirabel +5
We have observed an extended region surrounding the first discovered galactic superluminal source GRS 1915+105, seeking evidence of interaction between the relativistic ejecta of t…
Anomalous Surface Brightness Fluctuations in NGC 4489
S. Mei, D. R. Silva, P. J. Quinn
Anomalously high K-band surface brightness fluctuations (SBF) have been reported in NGC 4489 by Pahre & Mould (1994), Jensen et al. (1996) and Jensen et al. (1998). However, these…
XMM-Newton observation of the Lockman Hole; I. The X-ray Data
G. Hasinger, B. Altieri, M. Arnaud +25
We report on the first deep X-ray survey with the XMM-Newton observatory during the performance verification phase. The field of the Lockman Hole, one of the best studied sky areas…
Galaxy mapping with the SAURON integral-field spectrograph: The star formation history of NGC 4365
Roger L. Davies, Harald Kuntschner, Eric Emsellem +9
We report the first wide-field mapping of the kinematics and stellar populations in the E3 galaxy NGC 4365. The velocity maps extend previous long-slit work. They show two independ…