Event calendar file
3-11 July 2007
Merida, Mexico
Mexico/General timezone
- icrc2007@icrc2007.unam.mx
Support
SH 5.3
Place
Location: Merida, Mexico
Room: Yucatan I (Fiesta Americana)
Date:
10 Jul 12:05 - 13:30
Conveners
-
- Dr. Burger, Renier (North-West University)
Timetable | Contribution List
Displaying 7
contributions
out of
7
The subsonic heliosheath beyond the termination shock (TS) of the solar wind plays a
profound role in the transport of anomalous (ACR) and galactic cosmic rays (GCR). The
energetic particle observations of Voyager-1, after crossing the TS in December 2004,
indicate that the distribution of ACR is not uniform in the heliosheath.
We point out that our concepts based on a simple 1-D shock canno
... More
Presented by Dr. Jozsef KOTA
on
10/7/2007
at
17:41
Voyager 1 observations at the termination shock and in the
heliosheath revealed new phenomena which required rethinking
of some of our established paradigms. Very important among the new
factors is the temporal and probably spatial variations
which produce a number of effects which affect the
energetic-particle spectra, anisotropies and their
time variations observed at Voyager1.
... More
Presented by Prof. Jack (Randy) JOKIPII
on
10/7/2007
at
17:29
A numerical model, based on Parker’s transport equation, is utilized to
investigate several aspects of the modulation of cosmic rays and the
anomalous component beyond the solar wind termination shock (TS), in
particular in the heliosheath, in the nose direction of the heliosphere. These
aspects include: The latitude dependence of (1) radial perpendicular diffusion,
the dominant diffu
... More
Presented by Prof. Marius POTGIETER
The origin of anomalous cosmic ray ions has long been assumed to be heliospheric
pickup ion production from interstellar neutrals and acceleration at the solar wind
termination shock. The Voyager-1 shock crossing showed a well-defined boundary for
sharply increased keV ion fluxes in the heliosheath but no sign of local
acceleration. Ion flux spectra at keV to MeV energies are instead unfolding
... More
Presented by Dr. John F. COOPER
on
10/7/2007
at
17:05
Stochastic acceleleration has been unimportant inside the solar wind termination
shock. This is due to the fact that, its characteristic time is much larger than the
time for particle propagation in this region. However, in the heliosheath, where the
turbulence in the heliospheric magnetic field increases with the radial distance and
the solar wind speed decreases as it moves out, the accelera
... More
Presented by Prof. Harm MORAAL
on
10/7/2007
at
18:05
Anomalous cosmic ray spectra, observed by Voyager 1 at the solar wind
terminatiuon shock crossing, were not of the form expected of first
order Fermi (or shock) acceleration, but gave an indication that they
were modulated relative to that form. Further data analysis reveals two
other remarkable features, namely that the energy where the peak ACR
intensity occurs is about four times high
... More
Presented by Dr. Rogelio CABALLERO-LOPEZ
on
10/7/2007
at
17:17
The transport and acceleration of a few-MeV anomalous cosmic rays in the
heliosheath is studied. We show that the compression of the solar wind (due to
charge exchange) result in adiabatic acceleration of these particles.
Furthermore, anomalous cosmic rays also experience acceleration of a
stochastic nature in the inner heliosheath. Comparing numerical model results
with Voyager 1 cosmic
... More
Presented by Dr. Stefan FERREIRA
on
10/7/2007
at
17:53
