Search Publications
The kinematics of coronal mass ejections using multiscale methods
Gallagher, P. T.; Young, C. A.; McAteer, R. T. J. +1 more
Aims: The diffuse morphology and transient nature of coronal mass ejections (CMEs) make them difficult to identify and track using traditional image processing techniques. We apply multiscale methods to enhance the visibility of the faint CME front. This enables an ellipse characterisation to objectively study the changing morphology and kinematic…
AGN/starburst connection in action: the half million second RGS spectrum of NGC 1365
Zezas, A.; Bianchi, S.; Guainazzi, M. +4 more
Context: High-resolution X-ray observations in the imaging and spectral domain have recently opened a new window on active galactic nuclei (AGN) feedback onto the circumnuclear gas. Spectral diagnostics, as well as the remarkable morphological coincidence between [O iii] and X-rays, point to AGN photoionisation as the dominant ionisation mechanism…
The mass profile of early-type galaxies in overdense environments: the case of the double source-plane gravitational lens SL2SJ02176-0513
Kneib, J. -P.; Sygnet, J. -F.; Treu, T. +8 more
Context: The Strong Lensing Legacy Survey (SL2S) provides a sample of the strong lensing events associated with massive distant galaxies, some of which lie in the outskirts of galaxy groups and clusters.
Aims: We investigate the internal structure of early-type galaxies in overdense environments, where tidal forces are expected to alter dark m…
A self-consistent empirical model atmosphere, abundance and stratification analysis of the benchmark roAp star α Circini
Shulyak, D.; Ryabchikova, T.; Kochukhov, O.
Context: Chemically peculiar (CP) stars are unique natural laboratories for the investigation of the microscopic diffusion processes of chemical elements. The element segregation under the influence of gravity and radiation pressure leads to the appearance of strong abundance gradients in the atmospheres of CP stars. Consequently, the atmospheric …
A ionized reflecting skin above the accretion disk of GX 349+2
Robba, N. R.; Papitto, A.; Burderi, L. +4 more
Context: The broad emission features in the Fe-Kα region of X-ray binary spectra represent an invaluable probe to constrain the geometry and the physics of these systems. Several Low Mass X-ray binary systems (LMXBs) containing a neutron star (NS) show broad emission features between 6 and 7 keV and most of them are now interpreted as reflection f…
High energy emission and polarisation limits for the INTEGRAL burst GRB 061122
McGlynn, S.; McBreen, S.; Foley, S. +6 more
Context: GRB 061122 is one of the brightest GRBs detected within INTEGRAL's field of view to date, with a peak flux (20-200 keV) of 32 photons cm-2 s-1 and fluence of 2 × 10-5 erg cm-2. The Spectrometer aboard INTEGRAL, SPI, can measure linear polarisation in bright GRBs through the process of Compton sc…
New X-ray detections of Herbig stars
Schmitt, J. H. M. M.; Bouvier, J.; Robrade, J. +1 more
Context: The interpretation of X-ray detections from Herbig Ae/Be stars is disputed as it is not clear whether these intermediate-mass pre-main sequence stars are able to drive a dynamo and ensuing phenomena of magnetic activity. Alternative X-ray production mechanisms, related to stellar winds, star-disk magnetospheres, or unresolved late-type T …
Is cold gas fuelling the radio galaxy NGC 315?
Capetti, A.; Morganti, R.; de Ruiter, H. R. +5 more
We present WSRT, VLA and VLBI observations of the H i absorption in the radio galaxy NGC 315. The main result is that two H i absorbing systems are detected against the central region. In addition to the known highly redshifted, very narrow component, we detect relatively broad (FWZI ~ 150 km s-1) absorption. This broad component is red…
Planetary transit candidates in CoRoT-LRc01 field
Mazeh, T.; Aigrain, S.; Alapini, A. +52 more
Aims: We present here the list of planetary transit candidates detected in the first long run observed by CoRoT: LRc01, towards the galactic center in the direction of Aquila, which lasted from May to October 2007.
Methods: we analyzed 3719 (33%) sources in the chromatic bands and 7689 in the monochromatic band. Instrumental noise and the stel…
Statistical evaluation of the flux cross-calibration of the XMM-Newton EPIC cameras
Read, A. M.; Saxton, R. D.; Mateos, S. +1 more
Context: The second XMM-Newton serendipitous source catalogue, 2XMM, provides the ideal data base for performing a statistical evaluation of the flux cross-calibration of the XMM-Newton European Photon Imaging Cameras (EPIC).
Aims: We aim to evaluate the status of the relative flux calibration of the EPIC cameras on board the XMM-Newton observ…