Event calendar file
3-11 July 2007
Merida, Mexico
Mexico/General timezone
- icrc2007@icrc2007.unam.mx
Support
SH 3.2
Place
Location: Merida, Mexico
Room: Yucatan I (Fiesta Americana)
Date:
9 Jul 12:05 - 13:30
Conveners
-
- Dr. Dasso, Sergio (Instituto de Astronomía y Física del Espacio (IAFE))
Timetable | Contribution List
Displaying 6
contributions
out of
6
The residual modulation refers to the invariant level of modulation (modulation
potential approximately 450 MV) observed at sunspot minimum since the
commencement of the neutron monitor record in 1951. Satellite measurements
of the heliomagnetic field show that it exhibited a similar invariance (~5.2 nT)
between the sunspot minima of 1965 and 1996. The cosmic ray record since
1428 shows
... More
Presented by Dr. Ken MCCRACKEN
on
9/7/2007
at
17:29
We present a preliminary study of the observed 11-year modulation of galactic cosmic
rays for cycle 23. The detectors selected for the analyses have a track record of
stable operations and have median rigidities of response (Rm) covering a wide range
of GCR spectrum. Some of the observed features depend upon Rm while others are
independent of it. The detectors are located at different global s
... More
Presented by Prof. Harjit AHLUWALIA
on
9/7/2007
at
17:17
In the first part of paper on the basis of NM data for about 4 solar cycles we
investigate hysteresis effects, and separate convection-diffusion and drift
modulations in the suggestion that for NM data primary CR energies the
diffusion time lag may be neglected. Then we determine the relative role of drift
and convection-diffusion effects in the long-term CR variations. In the second
par
... More
Presented by Prof. Lev DORMAN
on
9/7/2007
at
17:41
GRAPES-3 experiment is situated at Ooty in South India 76.7 East 11.4 North.
Effective observation area of our muon telescopes is 560 m^2. They are the
largest detector in the world of its kind.
There were several reports that increase of the solar wind velocity suppresses
the intensity of cosmic rays. But there are few which studied qualitatively.
We have analyzed the variation of daily me
... More
Presented by T NONAKA
on
9/7/2007
at
17:05
This paper examines the properties of the ~2300-year periodicity in the galactic
cosmic radiation, previously recognized in power spectra of cosmogenic 10Be
and 14C. It shows that the periodicity consists of short episodes (50-100 year)
of high cosmic ray intensity, such as accompanied the Spoerer and Maunder
Minima, separated by long intervals (>1000years) of low intensities similar to,
... More
Presented by Dr. Ken MCCRACKEN
on
9/7/2007
at
18:05
Sunspot numbers, which reflect solar activity, have presented clear 11-year
periodicity since the early 18th century. However in the period around 1645 to
1715 AD sunspots were almost absent, and this period is called the Maunder
Minimum, one of grand solar minima implying weak solar activity. Variation of
solar activity in grand solar minima can be investigated by determining the
concen
... More
Presented by Mr. Kentaro NAGAYA
on
9/7/2007
at
17:53
