Conveners
session I: Tr. 2 Astronomy, Astrophysics and Cosmology
- Alejandro Saiz Rivera (Mahidol University)
Description
Astronomy&Astrophyiscs
A neutron monitor (NM) detects atmospheric secondary particles, mostly neutrons, due to cosmic rays, i.e., energetic particles from space. The main goal of an NM is to track time variations in the cosmic ray flux to high precision, over time scales from minutes to decades. These time variations are due to effects of the solar wind and solar storms, both of which vary with the 11-year sunspot...
The Earth’s gamma ray emission is produced from the interactions between cosmic rays (CRs), high-energy particles in space, and the Earth’s upper atmosphere. These gamma rays are measured by the Large Area telescope (LAT), the instrument onboard the Fermi Gamma-ray Space Telescope (Fermi) which was launched in 2008 to orbit the Earth at the altitude of ~540 km. Here we present preliminary...
In this study, the preliminary results are presented about the studies of kinematics properties of rotation of our galaxy and mapping the Milky Way galaxy only on quadrant I which is observed from the emission lines of neutral hydrogen (HI) at frequency 1420 MHz. Those observed HI clouds lead us to calculate the radial velocity from a shift in frequency of HI’s cloud which is called Doppler...
Jupiter’ polar emission is a part of Jovian’s aurora features that still receives debates about its origin and behavior of brightness which seem to be unstable. In this work, we study Jupiter’s polar emissions on May 13th 2007 observed by Advanced Camera for Surveys (ACS) camera on board the Hubble Space Telescope. We found that active region, which is a section of the polar region, appeared...
The occurrence region of the Earth’s aurora is mostly near the pole. The terrestrial aurora has a feature of emission band, which locates around geomagnetic latitude between 61 and 73 degrees. The appearance of the aurora is not in a stable form but changing with time. This study presents three periods of Earth’s auroral activity on April 28th, 2007, which was observed by the Visible Imaging...
