Search Publications
From large scale gas compression to cluster formation in the Antennae overlap region
Boulanger, F.; Nesvadba, N. P. H.; Herrera, C. N.
We present a detailed observational analysis of how merger-driven turbulence may regulate the star-formation efficiency during galaxy interactions and set the initial conditions for the formation of super star clusters. Using VLT/SINFONI, we obtained near-infrared imaging spectroscopy of a small region in the Antennae overlap region, coincident wi…
Transiting exoplanets from the CoRoT space mission. XVI. CoRoT-14b: an unusually dense very hot Jupiter
Mazeh, T.; Aigrain, S.; Alonso, R. +46 more
In this paper, the CoRoT ExoplanetScience Team announces its 14th discovery. Herein, we discuss the observations and analyses that allowed us to derive the parameters of this system: a hot Jupiter with a mass of 7.6 ± 0.6 Jupiter masses orbiting a solar-type star (F9V) with a period of only 1.5 d, less than 5 stellar radii from its parent star. It…
Internal dynamics of Abell 2254: a merging galaxy cluster with a clumpy, diffuse radio emission
Gastaldello, F.; Nonino, M.; Bardelli, S. +3 more
Context. The mechanisms giving rise to diffuse radio emission in galaxy clusters and, in particular, their connection with cluster mergers are still being debated.
Aims: We explore the internal dynamics of Abell 2254, which has been shown to host a very clumpy and irregular radio halo.
Methods: Our analysis is mainly based on redshift da…
Tracing the energetics and evolution of dust with Spitzer: a chapter in the history of the Eagle Nebula
Boulanger, F.; Paladini, R.; Noriega-Crespo, A. +5 more
Context. The Spitzer GLIMPSE and MIPSGAL surveys have revealed a wealth of details about the Galactic plane in the infrared (IR) with orders of magnitude higher sensitivity, higher resolution, and wider coverage than previous IR observations. The structure of the interstellar medium (ISM) is tightly connected to the countless star-forming regions.…
The location of an active nucleus and a shadow of a tidal tail in the ULIRG Mrk 273
Veilleux, S.; Sanders, D. B.; Surace, J. A. +9 more
Analysis of data from the Chandra X-ray Observatory for the double nucleus ULIRG Mrk 273 reveals an absorbed hard X-ray source coincident with the southwest nucleus, implying that this unresolved, near-infrared source is where an active nucleus resides, while the northern nuclear region contains a powerful starburst that dominates the far infrared…
Discovery of gamma- and X-ray pulsations from the young and energetic PSR J1357-6429 with Fermi and XMM-Newton
Camilo, F.; Cohen-Tanugi, J.; Grondin, M. -H. +20 more
Context. Since the launch of the Fermi satellite, the number of known gamma-ray pulsars has increased tenfold. Most gamma-ray detected pulsars are young and energetic, and many are associated with TeV sources. PSR J1357-6429 is a high spin-down power pulsar (Ė = 3.1 × 1036 erg s-1), discovered during the Parkes multibeam surv…
Constructing a Galactic coordinate system based on near-infrared and radio catalogs
Zhu, Z.; Liu, J. -C.; Hu, B.
Context. The definition of the Galactic coordinate system was announced by the IAU Sub-Commission 33b on behalf of the IAU in 1958. An unrigorous transformation was adopted by the Hipparcos group to transform the Galactic coordinate system from the FK4-based B1950.0 system to the FK5-based J2000.0 system or to the International Celestial Reference…
Broad iron emission lines in Seyfert galaxies - re-condensation of gas onto an inner disk below the ADAF?
Meyer, F.; Meyer-Hofmeister, E.
Context. The number of strong iron Kα line detections in Seyfert AGN is clearly growing in the Chandra, XMM-Newton and Suzaku era. The iron emission lines are broad, some are relativistically blurred. These relativistic disk lines have also been observed for galactic black hole X-ray binaries. Thermal components found in hard spectra we…
Gas temperature profiles in galaxy clusters with Swift XRT: observations and capabilities to map near R200
Moretti, A.; Molendi, S.; Gastaldello, F. +1 more
Aims: We investigate the possibility of using the X-ray telescope (XRT) on board the Swift satellite to improve the current accuracy of the intra-cluster medium (ICM) temperature measurements in the region close to the virial radius of nearby clusters.
Methods: We present the spectral analysis of the Swift XRT observations of 6 galaxy cl…
Discovery of the correspondence between intra-cluster radio emission and a high pressure region detected through the Sunyaev-Zel'dovich effect
Croston, J. H.; Bourdin, H.; Mazzotta, P. +9 more
We analyzed new 237 MHz and 614 MHz GMRT data of the most X-ray luminous galaxy cluster, RX J1347-1145. Our radio results are compared with the MUSTANG 90 GHz Sunyaev-Zel'dovich effect map and with re-processed Chandra and XMM-Newton archival data of this cluster. We point out for the first time in an unambiguous way the correspondence between a r…