40.2k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR2.5k papers
- European Southern ObservatoryCL1.5k papers
- Max Planck SocietyDE1.4k papers
- National Institute for AstrophysicsIT1.4k papers
- Center for Astrophysics Harvard & SmithsonianUS1.4k papers
- Ludwig-Maximilians-Universität MünchenDE1.4k papers
- Leiden UniversityNL1.3k papers
- California Institute of TechnologyUS1.2k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR1.2k papers
- Max Planck Institute for AstronomyDE1.1k papers
- University of CambridgeGB950 papers
- University College LondonGB919 papers
56 papers · 2 filters
Radio and Gamma-Ray Constraints on the Emission Geometry and Birthplace of PSR J2043+2740
A. Noutsos, A. A. Abdo, M. Ackermann +146
We report on the first year of Fermi gamma-ray observations of pulsed high-energy emission from the old PSR J2043+2740. The study of the gamma-ray efficiency of such old pulsars gi…
Water in Star-Forming Regions with the Herschel Space Observatory (WISH): Overview of key program and first results
E. F. van Dishoeck, L. E. Kristensen, A. O. Benz +12
`Water In Star-forming regions with Herschel' (WISH) is a key program on the Herschel Space Observatory designed to probe the physical and chemical structure of young stellar objec…
Mid-Infrared Spectral Diagnostics of Luminous Infrared Galaxies
A. O. Petric, L. Armus, J. Howell +22
We present a statistical analysis of the mid-infrared (MIR) spectra of 248 luminous infrared (IR) galaxies (LIRGs) which comprise the Great Observatories All-sky LIRG Survey (GOALS…
Formation of Cold Filamentary Structure from Wind Blown Superbubbles
Evangelia Ntormousi, Andreas Burkert, Katharina Fierlinger +1
The expansion and collision of two wind-blown superbubbles is investigated numerically. Our models go beyond previous simulations of molecular cloud formation from converging gas f…
Performance of astrometric detection of a hotspot orbiting on the innermost stable circular orbit of the galactic centre black hole
F. H. Vincent, T. Paumard, G. Perrin +3
The galactic central black hole Sgr A* exhibits outbursts of radiation in the near infrared (so-called IR flares). One model of these events consists in a hotspot orbiting on the i…
Galactic ménage à trois: Simulating magnetic fields in colliding galaxies
H. Kotarba, H. Lesch, K. Dolag +4
We present high resolution simulations of a multiple merger of three disk galaxies including the evolution of magnetic fields performed with the N-body/SPH code Gadget. For the fir…
Gas dynamics in whole galaxies: SPH
Clare Dobbs
I review the progress of SPH calculations for modelling galaxies, and resolving gas dynamics on GMC scales. SPH calculations first investigated the response of isothermal gas to a…
Optical/IR counterpart to the resolved X-ray jet source CXO J172337.5-373442 and its distance
Bhaswati Mookerjea, Pietro Parisi, Sudip Bhattacharyya +3
We present results of observations in the optical to mid-infrared wavelengths of the X-ray source CXO J172337.5-373442, which was serendipitously discovered in the Chandra images a…
The outer halos of elliptical galaxies
Ortwin Gerhard
Recent progress is summarized on the determination of the density distributions of stars and dark matter, stellar kinematics, and stellar population properties, in the extended, lo…
zCOSMOS 10k-bright spectroscopic sample: exploring mass and environment dependence in early-type galaxies
M. Moresco, L. Pozzetti, A. Cimatti +58
We present the analysis of the U-V rest-frame color distribution and some spectral features as a function of mass and environment for two sample of early-type galaxies up to z=1 ex…
Bulgeless Giant Galaxies Challenge our Picture of Galaxy Formation by Hierarchical Clustering
John Kormendy, Niv Drory, Ralf Bender +1
We dissect giant Sc-Scd galaxies with Hubble Space Telescope photometry and Hobby-Eberly Telescope spectroscopy. We use HET's High Resolution Spectrograph (resolution = 15,000) to…
Detection of 16 Gamma-Ray Pulsars Through Blind Frequency Searches Using the Fermi LAT
LAT Collaboration
Pulsars are rapidly-rotating, highly-magnetized neutron stars emitting radiation across the electromagnetic spectrum. Although there are more than 1800 known radio pulsars, until r…
The two states of Sgr A* in the near-infrared: bright episodic flares on top of low-level continuous variability
K. Dodds-Eden, S. Gillessen, T. K. Fritz +11
In this paper we examine properties of the variable source Sgr A* in the near-infrared (NIR) using a very extensive Ks-band data set from NACO/VLT observations taken 2004 to 2009.…
VLT Kinematics for omega Centauri: Further Support for a Central Black Hole
Eva Noyola, Karl Gebhardt, Markus Kissler-Patig +4
The Galactic globular cluster omega Centauri is a prime candidate for hosting an intermediate mass black hole. Recent measurements lead to contradictory conclusions on this issue.…
Variations in H2O+/H2O ratios toward massive star-forming regions
F. Wyrowski, F. van der Tak, F. Herpin +63
Early results from the Herschel Space Observatory revealed the water cation H2O+ to be an abundant ingredient of the interstellar medium. Here we present new observations of the H2…
Water abundances in high-mass protostellar envelopes: Herschel observations with HIFI
M. Marseille, F. F. S. van der Tak, F. Herpin +4
We derive the dense core structure and the water abundance in four massive star-forming regions which may help understand the earliest stages of massive star formation. We present…
Hot gas haloes around disc galaxies: O VII column densities from galaxy formation simulations
Evangelia Ntormousi, Jesper Sommer-Larsen
Numerical models of disc galaxy formation predict the existence of extended, hot ( T~10^6 K) gas haloes around present day spirals. The X-ray luminosity of these haloes is predicte…
Hydrides in Young Stellar Objects: Radiation tracers in a protostar-disk-outflow system
Arnold O. Benz, Simon Bruderer, Ewine F. van Dishoeck +2
Context: Hydrides of the most abundant heavier elements are fundamental molecules in cosmic chemistry. Some of them trace gas irradiated by UV or X-rays. Aims: We explore the abund…
The colour-magnitude relation of Elliptical and Lenticular galaxies in the ESO Distant Cluster Survey
Yara L. Jaffe, Alfonso Aragon-Salamanca, Gabriella De Lucia +4
We study the colour-magnitude relation (CMR) for a sample of 172 morphologically-classified E/S0 cluster galaxies from the ESO Distant Cluster Survey (EDisCS) at 0.4<z<0.8. The int…
Age distributions of star clusters in spiral and barred galaxies as a test for theories of spiral structure
C. L. Dobbs, J. E. Pringle
We consider models of gas flow in spiral galaxies in which the spiral structure has been excited by various possible mechanisms: a global steady density wave, self-gravity of the s…
Water vapor toward starless cores: the Herschel view
P. Caselli, E. Keto, L. Pagani +63
SWAS and Odin provided stringent upper limits on the gas phase water abundance of dark clouds (x(H2O) < 7x10^-9). We investigate the chemistry of water vapor in starless cores beyo…
A catalogue of young runaway Hipparcos stars within 3kpc from the Sun
N. Tetzlaff, R. Neuhäuser, M. M. Hohle
Traditionally runaway stars are O and B type stars with large peculiar velocities.We want to extend this definition to young stars (up to ~50 Myr) of any spectral type and identify…
The structure of gravitationally unstable gas-rich disk galaxies
Michael Aumer, Andreas Burkert, Peter H. Johansson +1
We use a series of idealized, numerical SPH simulations to study the formation and evolution of galactic, gas-rich disks forming from gas infall within dark matter halos. The tempe…
Distinct core and halo stellar populations and the formation history of the bright Coma cluster early-type galaxy NGC 4889
Lodovico Coccato, Ortwin Gerhard, Magda Arnaboldi
We study the stellar population far into the halo of one of the two brightest galaxies in the Coma cluster, NGC 4889, based on deep medium resolution spectroscopy with FOCAS at the…