8.6k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Leiden UniversityNL722 papers
- Centre National de la Recherche ScientifiqueFR633 papers
- University of AmsterdamNL630 papers
- University of GroningenNL511 papers
- Center for Astrophysics Harvard & SmithsonianUS508 papers
- Radboud University NijmegenNL424 papers
- Leiden Observatory362 papers
- Max Planck Institute for Extraterrestrial PhysicsDE362 papers
- National Institute for AstrophysicsIT342 papers
- Goddard Space Flight CenterUS333 papers
- California Institute of TechnologyUS313 papers
- University of CambridgeGB299 papers
84 papers · 2 filters
A comparative study of the X-ray afterglow properties of optically bright and dark GRBs
M. De Pasquale, L. Piro, R. Perna +9
We have examined the complete set of X-ray afterglow observations of dark and optically bright GRBs performed by BeppoSAX until February 2001. X-ray afterglows are detected in 90%…
Discovery of a binary AGN in the ultraluminous infrared galaxy NGC 6240 using Chandra
Stefanie Komossa, Vadim Burwitz, Guenther Hasinger +3
Ultraluminous infrared galaxies (ULIRGs) are outstanding due to their huge luminosity output in the infrared, which is predominantly powered by super starbursts and/or hidden activ…
Connection between PAHs and small hydrocarbons in the Horsehead Nebula Photo-Dissociation Region
David Teyssier, David Fosse, Maryvonne Gerin +3
We present recent observations of small hydrocarbons (C3H2, C2H, C4H) with high abundances in the Photo-Dissociation Region of the Horsehead nebula. Our results show for the first…
Photospheric radius expansion X-ray bursts as standard candles
E. Kuulkers, P. R. den Hartog, J. J. M. in 't Zand +3
We examined the maximum bolometric peak luminosities during type I X-ray bursts from the persistent or transient luminous X-ray sources in globular clusters. We show that for about…
High resolution soft X-ray spectroscopy of the elliptical galaxy NGC 5044. Results from the reflection grating spectrometer on-board XMM-Newton
T. Tamura, J. S. Kaastra, K. Makishima +1
The results from an X-ray spectroscopic study of the giant elliptical galaxy NGC5044 in the center of a galaxy group are presented. The line dominated soft X-ray spectra (mainly Fe…
The Millennium Outburst of the Cool Hypergiant Rho Cassiopeiae: Spectroscopy and Modeling
A. Lobel, A. K. Dupree, R. P. Stefanik +7
Between 2000 June and September an exceptional variability phase occurred in the peculiar F-type hypergiant Rho Cas, when the V-brightness dimmed by at least a full magnitude. The…
Results of the ESO-SEST Key Programme on CO in the Magellanic Clouds. IX. The giant LMC HII region complex N11
F. P. Israel, Th. de Graauw, L. E. B. Johansson +7
We present maps and a catalogue containing the J=1-0 12CO parameters of 29 individual molecular clouds in the second-brightest LMC star formation complex, N11. In the southwestern…
The Soft X-ray Spectrum from NGC 1068 Observed with LETGS on Chandra
A. C. Brinkman, J. S. Kaastra, R. L. J. van der Meer +5
Using the combined spectral and spatial resolving power of the Low Energy Transmission Grating (LETGS) on board Chandra, we obtain separate spectra from the bright central source o…
The dynamics of the nebula M1-67 around the run-away Wolf-Rayet star WR 124
M. V. van der Sluys, H. J. G. L. M. Lamers
A new point of view on the dynamics of the circumstellar nebula M1-67 around the run-away Wolf-Rayet (WR) star WR 124 is presented. We found that it has been interacting with the s…
Gravitationally redshifted absorption lines in the X-ray burst spectra of a neutron star
J. Cottam, F. Paerels, M. Mendez
The fundamental properties of neutron stars provide a direct test of the equation of state of cold nuclear matter, a relationship between pressure and density that is determined by…
The disruption time of clusters in selected regions of four galaxies
Henny J. G. L. M. Lamers, Stratos G. Boutloukos
If the cluster formation rate is constant and the disruption time of clusters depends on their initial mass as t_dis= t_4 x (M_i/10^4 Msun)^gamma, where M_i is the initial mass of…
XMM-Newton confirmation of Soft X-ray excess emission in clusters of galaxies - the discovery of O VII emission from an extended warm baryonic component
J. S. Kaastra, R. Lieu, T. Tamura +2
We investigate a sample of 14 clusters of galaxies observed with XMM-Newton in a search for soft X-ray excess emission. In five of these clusters a significant soft excess is evide…
High Resolution X-ray Spectroscopic Constraints on Cooling-Flow Models for Clusters of Galaxies
J. R. Peterson, S. M. Kahn, F. B. S. Paerels +5
We present high resolution X-ray spectra of 14 putative cooling-flow clusters of galaxies obtained with the Reflection Grating Spectrometer on XMM-Newton. The clusters in the sampl…
Star Cluster Formation and Disruption Time-Scales -- I. An empirical determination of the disruption time of star clusters in four galaxies
S. G. Boutloukos, H. J. G. L. M. Lamers
We present a new method to derive the cluster disruption time in selected regions of galaxies from the mass or age distribution of magnitude-limited cluster samples. If the disrupt…
Clusters in the inner spiral arms of M51: the cluster IMF and the formation history
A. Bik, H. J. G. L. M. Lamers, N. Bastian +2
We study the cluster population in a region of 3.2x3.2 kpc^2 in the inner spiral arms of the intergacting galaxy M51, at a distance of about 1 to 3 kpc from the nucleus, based on H…
An explanation for the curious mass loss history of massive stars: from OB stars, through Luminous Blue Variables to Wolf-Rayet stars
H. J. G. L. M. Lamers, T. Nugis
The stellar winds of massive stars show large changes in mass-loss rates and terminal velocities during their evolution from O-star through the Luminous Blue Variable phase to the…
The dust disk of HR4049
C. Dominik, C. P. Dullemond, J. Cami +1
We present the Spectral Energy Distribution of HR 4049 based on literature data and new continuum measurements at 850 micron. The SED shows variable absorption in the UV, and a lar…
The census of cataclysmic variables in the ROSAT Bright Survey
A. D. Schwope, H. Brunner, D. Buckley +5
We give an identification summary and results of polarimetric, photometric and spectroscopic follow-up observations of new, X-ray bright cataclysmic variables. These were identifie…
Water emission in NGC1333-IRAS4: The physical structure of the envelope
S. Maret, C. Ceccarelli, E. Caux +2
We report ISO-LWS far infrared observations of CO, water and oxygen lines towards the protobinary system IRAS4 in the NGC1333 cloud. We detected several water, OH, CO rotational li…
The WSO, a world-class observatory for the ultraviolet
M. A. Barstow, L. Binette, N. Brosch +17
The World Space Observatory is an unconventional space project proceeding via distributed studies. The present design, verified for feasibilty, consists of a 1.7-meter telescope op…
Iron Emission Lines from Extended X-ray Jets in SS 433: Reheating of Atomic Nuclei
Simone Migliari, Rob Fender, Mariano Mendez
Powerful relativistic jets are among the most ubiquitous and energetic observational consequences of accretion around supermassive black holes in active galactic nuclei and neutron…
Coronal density diagnostics with Helium-like triplets: CHANDRA--LETGS observations of Algol, Capella, Procyon, Eps Eri, Alpha Cen A&B, UX Ari, AD Leo, YY Gem, and HR1099
J. -U. Ness, J. H. M. M. Schmitt, V. Burwitz +5
We present an analysis of ten cool stars (Algol, Capella, Procyon, Eps Eri, Alpha Cen A&B, UX Ari, AD Leo, YY Gem, and HR1099) observed with the Low Energy Transmission Grating Spe…
XMM-Newton EPIC observations of Her X-1
Gavin Ramsay, Silvia Zane, Mario Jimenez-Garate +2
We present spin-resolved X-ray data of the neutron star binary Her X-1 taken using the EPIC detectors on XMM-Newton. The data were taken at three distinct epochs through the 35 day…
The 2-10 keV emission properties of PSR B1937+21
L. Nicastro, G. Cusumano, L. Kuiper +3
We present the results of a BeppoSAX observation of the fastest pulsar known: PSR B1937+21. The ~ 200 ks observation (78.5 (34) ks MECS (LECS) exposure times) allowed us to investi…