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Dust in the giant elliptical galaxy - evidence of
collision of several spiral galaxies ?
Galactic Radio Arcs originating from the vicinity
of the black hole in the galaxy center - plasma
streaming along magnetic field lines ?
Same place - X rays
due to the collision
of the hot plasma
with a cold cloud ?
Recent EIT 195
movie
QuickTime™ and a
YUV420 codec decompressor
are needed to see this picture.
Supernova in UV in another galaxy
‫‪6‬שיעור‬
‫מעבר הקרינה ‪n‬‬
Exercise: Syhchrotron emission from
a power-law distribution
Exercise: Power of inverse Compton
scattering
Exercise: Natural line profile
‫תצפיות‬
‫הספק‬
‫שטף האנרגיה‬
‫כיוון‬
‫תדר‬
‫קשר בין ערכים‬
Q: Isotropic intensity - what is the flux ?
‫צפיפות האנרגיה‬
‫שטף התנע‬
Q: Isotropic intensity - what is the pressure ?
Q: Sun interior - flux ? pressure ?
‫משוואת המצב‬
‫קרינה איזוטרופית‬
‫דפנות מחזירות‬
‫פליטה ובליעה‬
‫פליטה ספונטנית‬
Q: Initial intensity =0 ?
Q: Emissivity = 0 ?
‫פליטה מאולצת ובליעה‬
‫עומק אופטי‬
Q: Optical depth - physical sense ?
Q: Dependence on the frame ?
‫פיזור‬
‫בליעה ופליטה‬
Q: Diff eq ?
Q: If non-isotropic scattering ?
‫משוואת מעבר הקרינה‬
‫פתרון‬
‫מקרה פשוט‬
Q: No initial intensity - what is this ?
Small and large optical depth ?
Q: Only Thomson scattering in the Sun.
What is the optical depth ?
Q: How long travels light before leaving
the Sun ?
‫גוף שחור‬
‫גוף שחור‬
‫המשך‬
‫קרינה תרמית‬
‫פליטה או בליעה‬
Q: Maximum intensity from a thermally
emitting body ?
Q: Where do the photons come from ?
Q: Emission and absorption lines ?
Q: Line shape (saturation) ?
‫פוטונים חופשיים‬
Q: Redshifted emission - intensity ?
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