Search Publications
A Multiwavelength Study of a Sample of 70 µm Selected Galaxies in the COSMOS Field. I. Spectral Energy Distributions and Luminosities
Aussel, H.; Le Floc'h, E.; Kartaltepe, Jeyhan S. +26 more
We present a large robust sample of 1503 reliable and unconfused 70 µm selected sources from the multiwavelength data set of the Cosmic Evolution Survey. Using the Spitzer IRAC and MIPS photometry, we estimate the total infrared (IR) luminosity, L IR (8-1000 µm), by finding the best-fit template from several different templa…
A systematic analysis of the broad iron Kα line in neutron-star LMXBs with XMM-Newton
Díaz Trigo, M.; Cadolle Bel, M.; Migliari, S. +1 more
We analysed the XMM-Newton archival observations of 16 neutron star (NS), low-mass X-ray binaries (LMXBs) to study the Fe K emission in these objects. The sample includes all the observations of NS LMXBs performed in EPIC pn timing mode with XMM-Newton publicly available until September 30, 2009. We performed a detailed data analysis considering p…
3D models of radiatively driven colliding winds in massive O + O star binaries - III. Thermal X-ray emission
Pittard, J. M.; Parkin, E. R.
The X-ray emission from the wind-wind collision in short-period massive O + O star binaries is investigated. The emission is calculated from 3D hydrodynamical models which incorporate gravity, the driving of the winds, orbital motion of the stars and radiative cooling of the shocked plasma. Changes in the amount of stellar occultation and circumst…
Reconnection and Energetics in Two-ribbon Flares: A Revisit of the Bastille-day Flare
Qiu, Jiong; Liu, WenJuan; Hill, Nicholas +1 more
We conduct a semi-quantitative analysis of two-ribbon flares to investigate the observational relationship between magnetic reconnection and energetics by revisiting the Bastille-day flare, particularly the UV and hard X-ray (HXR) observations. The analysis establishes that prominent UV emission is primarily produced by precipitating electrons tha…
Pumping out the atmosphere of Mars through solar wind pressure pulses
Barabash, S.; Futaana, Y.; Fränz, M. +6 more
We study atmospheric escape from Mars during solar wind pressure pulses. During the solar minimum of 2007-08 we have observed 41 high pressure events, which are predominantly identified as corotating interaction regions (CIR) while a few are coronal mass ejections (CME), in data from the Advanced Composition Explorer (ACE) upstream of the Earth. 3…
Completing the puzzle of the 2004-2005 outburst in V0332+53: the brightening phase included
Tsygankov, S. S.; Lutovinov, A. A.; Serber, A. V.
Analysis of the data obtained with the RXTE observatory during a powerful outburst of the X-ray pulsar V0332+53 in 2004-2005 is presented. Observational data covering the outburst brightening phase are analysed in detail for the first time. A comparison of source parameters and their evolution during the brightening and fading phases shows no evid…
High-excitation Emission Lines near Eta Carinae, and Its Likely Companion Star
Humphreys, Roberta M.; Davidson, Kris; Mehner, Andrea +1 more
In order to study the distribution of gas and ionizing radiation around η Car and their implications for its likely companion star, we have examined high-excitation emission lines of [Ne III], [Fe III], etc., in spectra obtained with the Hubble Space Telescope/Space Telescope Imaging Spectrograph instrument during 1998-2004. Our principal results,…
White dwarf masses in intermediate polars observed with the Suzaku satellite
Yamada, S.; Makishima, K.; Ebisawa, K. +5 more
Context. White dwarfs (WDs) in cataclysmic variables (CVs) are important experimental laboratories where the electron degeneracy is taking place on a macroscopic scale. Magnetic CVs increase in number especially in the hard X-ray band (≳ 10 keV) thanks to sensitive hard X-ray missions.
Aims: From X-ray spectroscopy, we estimate the masses of …
How Can a Negative Magnetic Helicity Active Region Generate a Positive Helicity Magnetic Cloud?
Mandrini, C. H.; Schmieder, B.; Pariat, E. +2 more
The geoeffective magnetic cloud (MC) of 20 November 2003 was associated with the 18 November 2003 solar active events in previous studies. In some of these, it was estimated that the magnetic helicity carried by the MC had a positive sign, as did its solar source, active region (AR) NOAA 10501. In this article we show that the large-scale magnetic…
Detection of hydrogen fluoride absorption in diffuse molecular clouds with Herschel/HIFI: an ubiquitous tracer of molecular gas
Menten, K. M.; Perault, M.; Boulanger, F. +47 more
We discuss the detection of absorption by interstellar hydrogen fluoride (HF) along the sight line to the submillimeter continuum sources W49N and W51. We have used Herschel's HIFI instrument in dual beam switch mode to observe the 1232.4762 GHz J = 1-0 HF transition in the upper sideband of the band 5a receiver. We detected foreground absorption …