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Microcalorimeter Instruments for the Spectrum-R(X)G and NeXT Missions

Ohashi, Takaya; Mitsuda, Kazuhisa; den Herder, Jan-Willem +2 more

X-ray spectrometers utilizing a microcalorimeter array are presently under study for the Russian Spectrum R-G (or Spectrum-X-Gamma) mission, which is to be launched in 2011, and for the Japanese NeXT (New X-ray Telescope or Non-thermal energy eXploration Telescope) mission, whose launch is expected to be in 2012 to 2015. The primary instrument of …

Oxygen line mapping of SN 1006 with Suzaku

Petre, Rob; Katsuda, Satoru; Tsujimoto, Masahiro +25 more

SN 1006 is one of the supernova remnants (SNRs) with relatively low-temperature electrons, considering the young age of just 1000 years. We carried out SN 1006 mapping observations with the X-ray Imaging Spectrometers (XIS) and the Hard X-ray Detector (HXD) onboard Suzaku, the fifth Japanese X-ray satellite. Thanks to the excellent spectral resolu…

XMM-Newton survey of non-thermal shell candidates: Preliminary results on DA 530

Bocchino, F.; Gallant, Y.; Bandiera, R.

The investigation of the general properties of non-thermal (NT) X-ray shell supernova remnants (SNRs), of which SN 1006 is the prototype, is important to understand how electrons are accelerated in SNR shocks and what is the origin of cosmic rays. Using the XMM-Newton satellite, we are carrying on a survey of putative non-thermal SNR candidates pr…

On the classification of ultra-compact nuclear rings

Beckman, John E.; Comerón, Sébastien; Knapen, Johan H.

Ultra-compact nuclear rings (UCNRs) can be defined as those galactic circumnuclear rings with a radius inferior to 200 parsecs [1]. Because very high spatial resolution is needed, this population has not been studied systematically until now. One important issue that has to be solved is whether UCNRs have an origin similar to larger circumnuclear …

Low-frequency fluctuations in the magnetosheath: Double Star TC-1 and Cluster observations

Zhang, TieLong; Du, Jian; Wang, Chi +1 more

The magnetic field variations are analyzed in the range of time periods from 4 s to 240 s in the magnetosheath observed by the Double Star TC-1 and Cluster in 2004. The characteristics of the magnetic field fluctuations are strongly controlled by the angle between the upstream interplanetary magnetic field (IMF) and the normal of the bow shock. Ge…

The pulsations of the B5IVe star HD181231 revealed by CoRoT

Neiner, C.; Janot-Pacheco, E.; Floquet, M. +12 more

We present the first results of the analysis of the light curve of the B5IVe star HD 181231 obtained during a long run (5 months) of the CoRoT mission. The light curve shows clear pulsations and even beating effects. Several frequencies are detected. Ground-based spec- troscopic data have also been analyzed and help to determine the rotation frequ…

Latitude-time distribution of the solar magnetic fields from 1975 to 2006

Minarovjech, M.

This paper presents the solar magnetic field distribution and meridional migration for the period of 1975-2006. A magnetic field latitude-time distribution map covering a 32-year period has been investigated. For this purpose a modified latitude-time diagram of the solar magnetic field distribution containing different kinds of fine structures is …

The Saturn system's icy satellites: New results from Cassini

Buratti, B. J.; Hendrix, A. R.; Lopes, R. M. C.

Are there Kronian electrons in the inner heliosphere?

Fichtner, H.; Lange, D.

Context: As the largest in our solar system the Jovian magnetosphere is treated in the literature as the dominant source of a few-MeV electrons, which have been measured by various spacecraft. In particular, observations obtained with Ulysses have significantly broadened the available data base.
Aims: We simulated the transports of MeV electro…

INTEGRAL and Swift Observations of Blazars in Outburst

Ghisellini, G.; Pian, E.; Foschini, L.

The blazars 3C 454.3, PKS 0537-441 and PKS 2155-304 are traditionally known to be among the most active sources of this class. They emit at all frequencies, up to gamma-rays, and are good probes of multiwavelength nuclear variability. The first two also have luminous broad emission line regions. We have recently monitored them with various facilit…