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Global distribution of total ozone on Mars from SPICAM/MEX UV measurements
Montmessin, F.; Fedorova, A.; Korablev, O. +4 more
The dual UV/IR spectrometer SPICAM on board the European mission Mars Express is dedicated to monitoring the Martian atmosphere and has recorded spectra for more than one Martian year, from January 2004 to April 2006, over a large range of latitudes and longitudes. SPICAM UV spectra were recorded on the day side in a nadir geometry, in the 110-320…
Stellar occultations observed by SPICAM on Mars Express
Bertaux, Jean-Loup; Korablev, Oleg; Quémerais, Eric +4 more
Spectroscopy for the Investigation of the Characteristics of the Atmosphere of Mars (SPICAM) is the first instrument orbiting a planet other than Earth that is dedicated to the technique of stellar occultation. During the first year of operation on board Mars Express, SPICAM observed more than 500 star occultations, yielding vertical profiles of C…
Reflectance spectra and chemical structure of Titan's tholins: Application to the analysis of Cassini Huygens observations
Quirico, E.; Schmitt, B.; Coll, P. +7 more
Titan's tholins are used as analogs of Titan's aerosols and N-rich organic solids present on many icy surfaces. However, it is not clear whether or not they are relevant analogs, and which kind of tholins should be used among a wide set available in literature. This paper presents reflectance spectral data of two tholins selected as end-members of…
Observing the Modification of the Acoustic Cutoff Frequency by Field Inclination Angle
McIntosh, Scott W.; Jefferies, Stuart M.
We use observations of a sunspot from the Transition Region and Coronal Explorer (TRACE) spacecraft to demonstrate observationally the modification of the acoustic cutoff frequency in the lower solar chromosphere by the changing the inclination of the magnetic field as first predicted theoretically by Bel & Leroy.
Interferometric 890 µm Images of High-Redshift Submillimeter Galaxies
Le Floc'h, E.; Yun, M. S.; Scott, D. +12 more
We present high-resolution 890 µm images of two 20 mJy submillimeter galaxies, SMM J123711+622212 and MIPS J142824.0+352619, obtained using the Submillimeter Array (SMA). Using submillimeter interferometric observations with an angular resolution of 2.5", the coordinates of these high-redshift sources are determined with an accuracy of 0.2".…
The early phases of a solar prominence eruption and associated flare: a multi-wavelength analysis
Mason, H. E.; Isobe, H.; Tripathi, D. +2 more
Aims.We aim to examine the precursor phases and early evolution of a prominence eruption associated with a M4-class flare and a partial halo coronal mass ejection (CME) observed on 2005 July 27. Our main goal is to investigate the precursor eruption signatures observed in EUV, X-ray and microwave emission and their relation to the prominence desta…
Chemical evolution in Sérsic 159-03 observed with XMM-Newton
Kaastra, J. S.; de Plaa, J.; Vink, J. +6 more
Using a new long X-ray observation of the cluster of galaxies Sérsic 159-03 with XMM-Newton, we derive radial temperature and abundance profiles using single- and multi-temperature models. The fits to the EPIC and RGS spectra prefer multi-temperature models especially in the core. The radial profiles of oxygen and iron measured with EPIC/RGS and t…
Faint supernovae and supernova impostors: case studies of SN 2002kg/NGC 2403-V37 and SN 2003gm
Smartt, S. J.; Bresolin, F.; Maund, J. R. +6 more
Photometric and spectroscopic observations of the faint Supernovae (SNe) 2002kg and 2003gm, and their precursors, in NGC 2403 and NGC 5334, respectively, are presented. The properties of these SNe are discussed in the context of previously proposed scenarios for faint SNe: low-mass progenitors producing underenergetic SNe; SNe with ejecta constrai…
Plasma Moments in the Environment of Mars. Mars Express ASPERA-3 Observations
Coates, A. J.; Fedorov, A.; Barabash, S. +7 more
We present the first electron and ion moment maps (density, velocity and temperature) of the martian plasma environment, using data from the ELS and IMA sensors of the ASPERA-3 experiment onboard Mars Express. Moments are calculated by integration and by Gaussian fits to the phase space distribution. The methods of calculation and the calibration …
The 1-1000µm spectral energy distributions of far-infrared galaxies
Dole, H.; Lagache, G.; Scott, D. +3 more
Galaxies selected at 170µm by the Infrared Space Observatory (ISO) Far-IR BACKground (FIRBACK) survey represent the brightest ~10 per cent of the cosmic infrared background. Examining their nature in detail is therefore crucial for constraining models of galaxy evolution. Here, we combine Spitzer archival data with previous near-infrared (ne…