Far Infrared Studies of the Galactic Plane
Mireya Etxaluze-Azkonaga (Open University, UK)
Monday 1st February 2010, 12:00pm
Pratt conference room, 60 Garden Street
AKARI is the first Japanese satellite dedicated for infrared astronomy. It made an all-sky survey at four wavelengths: 65, 90, 140 and 160 microns. The method used in order to calibrate the AKARI diffuse maps, principally the correction of the positional errors and the determination of the colour correction factors and the conversion factors are going to be described.
Maps of the diffuse Galactic Plane emission with AKARI provide a considerable increase in sharpness and fidelity over previously available data from the IRAS all sky survey. An overview of the Cygnus X star forming region using AKARI FIS data is going to presented.
The AKARI maps show many interesting structures and regions related to star formation activity, tracing the physical processes that trigger high and low mass star formation, as well as the distribution and properties of dust, along the Galactic Plane.
The dust emission at far-infrared wavelengths is a thermal emission peaking at 100 microns. Correlations of this emission at infrared wavelengths with the emission at sub-millimetre wavelengths allow us to study the physical properties of dust. We studied the "anomalous" dust emission in Ophiuchus by correlating a CBI map at 31 GHz with the ISO-LWS maps at far-infrared wavelengths.
ISO-LWS spectra were also used to constrain the physical conditions of the Galactic Centre by reproducing the observed emission line intensities with MOCASSIN photoionisation code.