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The eclipsing massive X-ray binary M 33 X-7: New X-ray observations and optical identification
Pietsch, W.; Haberl, F.; Ehle, M. +3 more
The eclipsing X-ray binary
XMM-Newton probes the stellar population in Chamaeleon I South
Neuhäuser, R.; Micela, G.; Stelzer, B.
We report on a 30 ks XMM-Newton observation of the central region of the Cha I star forming cloud. The field includes a substantial fraction of the known pre-main-sequence population of Cha I South, including all thirteen known very-low mass Hα emitters. We detect two bona-fide brown dwarfs (spectral types M 7.5 and M 8) and seven Hα emitting obje…
A two-dimensional Alfvén wave-driven solar wind model with proton temperature anisotropy
Li, Xing; Li, Bo; Habbal, Shadia R. +1 more
We present the first two-dimensional (2-D) Alfvén wave turbulence-driven solar wind model which takes the proton temperature anisotropy into account. While the modeled proton temperature anisotropy in the fast solar wind is established in the inner corona and yields Tp∥/Tp⊥ = 0.57 at 1 AU, which is compa…
Geometry of an interplanetary CME on October 29, 2003 deduced from cosmic rays
Marubashi, K.; Bieber, J. W.; Evenson, P. +16 more
A coronal mass ejection (CME) associated with an X17 solar flare reached Earth on October 29, 2003, causing an ~11% decrease in the intensity of high-energy Galactic cosmic rays recorded by muon detectors. The CME also produced a strong enhancement of the cosmic ray directional anisotropy. Based upon a simple inclined cylinder model, we use the an…
On the structure of polar faculae on the Sun
Okunev, O. V.; Kneer, F.
Faculae on the polar caps of the Sun, in short polar faculae (PFe), are investigated. They take part in the magnetic solar cycle. Here, we study the fine structures of PFe, their magnetic fields and their dynamics on short time scales. The observations stem from several periods in 2001 and 2002. They consist of spectropolarimetric data (Stokes I a…
The Nitrogen Isotopic Ratio in Jupiter's Atmosphere from Observations by the Composite Infrared Spectrometer on the Cassini Spacecraft
Flasar, F. M.; Owen, T.; Achterberg, R. K. +9 more
The Composite Infrared Spectrometer (CIRS) on the Cassini spacecraft made infrared observations of Jupiter's atmosphere during the flyby of 2000 December to 2001 January. The unique database in the 600-1400 cm-1 region with 0.53 and 2.8 cm-1 spectral resolutions obtained from the observations permits retrieval of global maps …
A Reexamination of the Evidence for Reconnection Inflow
Chen, P. F.; Brooks, D. H.; Shibata, K. +1 more
In the flare event of 1999 March 18, a threadlike structure observed in EUV Imaging Telescope images was found to move inward and collapse to an X-shaped configuration below the ejecta, strongly suggestive of the occurrence of magnetic reconnection. On the basis of the numerical results of a coronal mass ejection (CME) flare model, a similar threa…
Solitary structures associated with short large-amplitude magnetic structures (SLAMS) upstream of the Earth's quasi-parallel bow shock
Balogh, A.; Pickett, J. S.; André, M. +4 more
For the first time, solitary waves (SWs) have been observed within short large-amplitude magnetic structures (SLAMS) upstream of the Earth's quasi-parallel bow shock. The SWs often occur as bipolar pulses in the electric field data and move parallel to the background magnetic field at velocities of v = 400-1200 km/s. They have peak-to-peak amplitu…
XMM-Newton observations of GB B1428+4217: confirmation of intrinsic soft X-ray absorption
Iwasawa, K.; Fabian, A. C.; Celotti, A. +1 more
We report the results of XMM-Newton observations of the X-ray bright, radio-loud blazar GB B1428+4217 at a redshift of z= 4.72. We confirm the presence of soft X-ray spectral flattening at energies <~0.7 keV as reported in previous ROSAT and BeppoSAX observations. At hard X-ray energies, the spectrum is consistent with a power law, although we …
65 Cybele in the thermal infrared: Multiple observations and thermophysical analysis
Blommaert, J. A. D. L.; Müller, T. G.
We investigated the physical and thermal properties of