Search Publications
Grad-Shafranov Reconstruction of Magnetic Flux Ropes in the Near-Earth Space
Lui, A. T. Y.
Electric currents permeate space plasmas and often have a significant component along the magnetic field to form magnetic flux ropes. A larger spatial perspective of these structures than from the direct observation along the satellite path is crucial in visualizing their role in plasma dynamics. For magnetic flux ropes that are approximately two-…
Suzaku Detection of Diffuse Hard X-Ray Emission outside Vela X
Temim, Tea; Katsuda, Satoru; Petre, Robert +9 more
Vela X is a large, 3
On the simultaneity of substorm onset between two hemispheres
Misawa, H.; Parks, G. K.; Décréau, P. M. E. +13 more
Simultaneous observations of auroral kilometric radiation from the Northern and Southern Hemispheres showed some cases in which the buildup of field-aligned acceleration occurred only in one hemisphere at the substorm onset. This indicates that a substorm does not always complete the current system by connecting the cross-tail current with both no…
Vertical profile of H 2SO 4 vapor at 70-110 km on Venus and some related problems
Krasnopolsky, Vladimir A.
The vertical profile of H 2SO 4 vapor is calculated using current atmospheric and thermodynamic data. The atmospheric data include the H 2O profiles observed at 70-112 km by the SOIR solar occultations, the SPICAV-UV profiles of the haze extinction at 220 nm, the VeRa temperature profiles, and a typical profile of …
Diffuse thermal X-ray emission in the core of the young massive cluster Westerlund 1
Kavanagh, P. J.; Norci, L.; Meurs, E. J. A.
We present an analysis of the diffuse hard X-ray emission in the core of the young massive Galactic cluster Westerlund 1 based on a 48 ks XMM-Newton observation. Chandra results for the diffuse X-ray emission have indicated a soft thermal component together with a hard component that could be either thermal or non-thermal. We seek to resolve this …
Discovery of a Candidate Quiescent Low-mass X-Ray Binary in the Globular Cluster NGC 6553
Pavlov, George G.; Guillot, Sebastien; Zavlin, Vyacheslav E. +2 more
This paper reports the search for quiescent low-mass X-ray binaries (qLMXBs) in the globular cluster (GC) NGC 6553 using an XMM-Newton observation designed specifically for that purpose. We spectrally identify one candidate qLMXB in the core of the cluster, based on the consistency of the spectrum with a neutron star H-atmosphere model at the dist…
Interstellar H2 toward HD 37903
Gnaciński, P.
We present an analysis of interstellar H2 toward
Exploring the nature of the brightest hyper-luminous X-ray source
Maccarone, T. J.; Heywood, I.; Farrell, S. A. +7 more
The small subset of hyper-luminous X-ray sources with luminosities in excess of ∼1041 erg s-1 are hard to explain without the presence of an intermediate mass black hole, as significantly super-Eddington accretion and/or very small beaming angles are required. The recent discovery of HLX-1, the most luminous object in this cl…
Debris disc candidates in systems with transiting planets
Krivov, A. V.; Löhne, T.; Neuhäuser, R. +2 more
Debris discs are known to exist around many planet-host stars, but no debris dust has been found so far in systems with transiting planets. Using publicly available catalogues, we searched for infrared excesses in such systems. In the recently published Wide-field Infrared Survey Explorer catalogue, we found 52 stars with transiting planets. Two s…
Discovery of X-ray flaring activity in the Arches cluster
Czesla, S.; Cappelluti, N.; Capelli, R. +4 more
Context. We present a study of the Arches cluster based on XMM-Newton observations performed over the past 8 years. Unexpectedly, we find that the X-ray emission associated with the cluster experienced a marked brightening in March/April 2007.
Aims: We investigate the origin of both the X-ray continuum emission emanating from the star cluster…