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Non-thermal Emission in Sagittarius B? | | Cornelia C. Lang
; Patrick Palmer
; W. M. Goss
; | | Date: |
15 Jan 2008 | | Abstract: | In this paper, we summarize three recent papers which point out possible
non-thermal radio emission arising from the Sgr B region in the Galactic
Center. We also present a high-resolution and sensitive image of the Sgr B
region at 1.4 GHz made with the VLA. Using this image and a matched-array 327
MHz VLA image, we derive a thermal spectrum for the Sgr B complex and suggest
that the radio emission is a mixture of optically thin and optically thick
emission over the frequency range discussed here (255 MHz to 1.4 GHz). In
addition, we show that the the apparent non-thermal power law slope for the Sgr
B2 continuum temperature observed by the GBT is likely determined by source
structure and provides limited information about the physical processes in the
Sgr B region. While the structure Sgr B region is complex and furthermore
confused by the Galactic background, there does not appear to be substantial
evidence for a non-thermal component in Sgr B. | | Source: | arXiv, 0801.2168 | | Services: | Forum | Review | PDF | Favorites | |
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