Search Publications
Observational appearances of isolated stellar-mass black hole accretion Theory and observations
Karpov, S.; Beskin, G.; Biryukov, A. +2 more
General properties of accretion onto isolated stellar-mass black holes in the Galaxy are discussed. An analysis of plasma internal energy growth during the infall is performed. Adiabatic heating of collisionless accretion flow due to magnetic adiabatic invariant conservation is 25% more efficient than in the standard non-magnetized gas case. It is…
Correlation between solar flare productivity and photospheric vector magnetic fields
Wang, Huaning; Cui, Yanmei
Studying the statistical correlation between the solar flare productivity and photospheric magnetic fields is very important and necessary. It is helpful to set up a practical flare forecast model based on magnetic properties and improve the physical understanding of solar flare eruptions. In the previous study ([Cui, Y.M., Li, R., Zhang, L.Y., He…
Determination of reconnected flux via remote sensing
Penz, T.; Kubyshkin, I. V.; Nakamura, R. +4 more
Magnetic reconnection is one of the most fundamental processes in the magnetosphere. We present here a simple method to determine the essential parameters of reconnection such as reconnected flux and location of the reconnection site out of single spacecraft data via remote sensing. On the basis of a time-dependent reconnection model, the dependen…
Search for methane on Mars: Observations, interpretation and future work
Encrenaz, Thérèse
The detection of methane on Mars has been reported by three different teams in 2004. Two of them used ground-based high-resolution spectroscopy in the near infrared range. The third one used the Planetary Fourier Spectrometer aboard Mars Express. Among the data sets, two of them reported a mean CH4 mixing ratio of 10 ppb. However, these…
Modeling PSBL high speed ion beams observed by Cluster and Double Star
Bosqued, Jean-Michel; El-Alaoui, Mostafa; Walker, Raymond J. +3 more
On October 8, 2004, the Cluster and Double Star spacecraft crossed the near-Earth (12 19 RE) magnetotail neutral sheet during the recovery phase of a small, isolated substorm. Although they were separated in distance by ∼7 RE and in time by ∼30 min, both Cluster and Double Star observed steady, but highly structured Earthward…
INTEGRAL observations of the SNR IC443 region
Bocchino, F.; Kretschmar, P.; Bykov, A. M. +3 more
IC433 is a supernova remnant (SNR) interacting with a molecular cloud. The field of IC443 also contains an unidentified gamma-ray source 3EG J0617 + 2238. Recent observations with XMM-Newton and Chandra have revealed a number of hard X-ray sources in the field of the extended SNR including a pulsar wind nebula and an enigmatic hard X-ray source in…
Results from the study of an M7.6 flare and its associated CME
Li, Hui; Li, Youping
An M7.6 flare was well observed on October 24, 2003 in active region 10486 by a few instruments and satellites, including GOES, TRACE, SOHO, RHESSI and NoRH. Multi-wavelength study shows that this flare underwent two episodes. During the first episode, only a looptop source of <40 keV was observed in reconstructed RHESSI images, which showed sh…
Coronal radio-sounding detection of a CME during the 1997 Galileo solar conjunction
Plettemeier, D.; Bird, M. K.; Efimov, A. I. +3 more
Frequency fluctuations of the Galileo S-band radio signal were recorded nearly continuously during the spacecraft’s solar conjunction from December 1996 to February 1997. A strong propagating disturbance, most probably associated with a coronal mass ejection (CME), was detected on 7 February when the radio ray path proximate point was on the west …
Recent progress in time distance helioseismology
Zhao, Junwei
Time distance helioseismology is one of the local helioseismology techniques that are used to derive the interior properties of the Sun. It has been used to study the structures and flow fields beneath sunspots on local scales, as well as used to derive interior rotational rates and meridional flow velocities on global scales. In addition to the e…
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…