Search Publications
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…
Balancing the Cosmic Energy Budget: The Cosmic X-ray Background, Blazars, and the Compton Thick Active Galactic Nucleus Fraction
Ballantyne, D. R.; Draper, A. R.
At energies gsim2 keV, active galactic nuclei (AGNs) are the source of the cosmic X-ray background (CXB). For AGN population synthesis models to replicate the peak region of the CXB (~30 keV), a highly obscured and therefore nearly invisible class of AGN, known as Compton thick (CT) AGN, must be assumed to contribute nearly a third of the CXB. In …
Discovery of a Highly Energetic X-Ray Pulsar Powering HESS J1813-178 in the Young Supernova Remnant G12.82-0.02
Gotthelf, E. V.; Halpern, J. P.
We report the discovery of 44.7 ms pulsations from the X-ray source CXOU J181335.1-174957 using data obtained with the XMM-Newton Observatory. PSR J1813-1749 lies near the center of the young radio supernova remnant G12.82-0.02, which overlaps the compact TeV source HESS J1813-178. This rotation-powered pulsar is the second most energetic in the G…
Spitzer 24 µm Detections of Starburst Galaxies in Abell 851
Fritz, Jacopo; Dressler, Alan; Rieke, George +4 more
Spitzer-MIPS 24 µm observations and ground-based optical imaging and spectroscopy of the rich galaxy cluster Abell 851 at z = 0.41 are used to derive and compare star formation rates from the mid-IR 24 µm and from [O II] λλ3727 emission. Many cluster galaxies have star formation rates SFR(24µm)/SFR([O II]) Gt 1, indicative of sta…
The Ellipticities of Cluster Early-type Galaxies from z ~ 1 to z ~ 0: No Evolution in the Overall Distribution of Bulge-to-Disk Ratios
Kelson, D. D.; Demarco, R.; van der Wel, A. +7 more
We have compiled a sample of early-type cluster galaxies from 0 < z < 1.3 and measured the evolution of their ellipticity distributions. Our sample contains 487 galaxies in 17 z>0.3 clusters with high-quality space-based imaging and a comparable sample of 210 galaxies in 10 clusters at z < 0.05. We select early-type galaxies (elliptica…
Explosive Events Associated with a Surge
Doyle, J. G.; Madjarska, M. S.; de Pontieu, B.
The solar atmosphere contains a wide variety of small-scale transient features. Here, we explore the interrelation between some of them such as surges, explosive events, and blinkers via simultaneous spectral and imaging data taken with the TRACE imager, the SUMER and Coronal Diagnostics Spectrometer (CDS) on board SOHO, and Swedish Vacuum Solar T…
The ~0.9 mJy Sample: A Mid-Infrared Spectroscopic Catalog of 150 Infrared-Luminous, 24 µm Selected Galaxies at 0.3 <= z <= 3.5
Fadda, Dario; Armus, Lee; Helou, George +6 more
We present a catalog of mid-infrared (MIR) spectra of 150 infrared (IR) luminous galaxies in the Spitzer extragalactic first look survey obtained with the IR spectrograph on board the Spitzer Space Telescope. The sample is selected to be brighter than ~0.9 mJy at 24 µm and it has a redshift distribution in the range [0.3, 3.5], with a peak a…
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…
New estimates of the gamma-ray line emission of the Cygnus region from INTEGRAL/SPI observations
Meynet, G.; Knödlseder, J.; Diehl, R. +1 more
Context: The Cygnus region harbours a huge complex of massive stars at a distance of 1.0-2.0 kpc from us. About 170 O stars are distributed over several OB associations, among which the Cyg OB2 cluster is by far the largest with about 100-120 O stars. As a consequence of their successive nuclear-burning episodes, these massive stars inject large q…
MMTF-Hα and HST-FUV Imaging of the Filamentary Complex in ABELL 1795
Veilleux, Sylvain; McDonald, Michael
We have obtained deep, high spatial resolution images of the central region of Abell 1795 at Hα and [N II] λ6583 with the Maryland-Magellan Tunable Filter (MMTF), and in the far-ultraviolet (FUV) with the Advanced Camera for Surveys solar blind channel on the Hubble Space Telescope (HST). The superb image quality of the MMTF data has made it possi…