From Radio with Love: an overview of the role of radio observations in understanding high-energy emission from active galaxies

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Ojha_2012_J._Phys.__Conf._Ser._355_012006.pdf (845.67 KB)

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https://iopscience.iop.org/article/10.1088/1742-6596/355/1/012006

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http://hdl.handle.net/11603/18212
 https://doi.org/10.1088/1742-6596/355/1/012006

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UMBC Physics Department
UMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)

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2012-03-26

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journal articles
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Ojha, Roopesh; From Radio with Love: an overview of the role of radio observations in understanding high-energy emission from active galaxies; Journal of Physics: Conference Series, Volume 355 (2012); https://iopscience.iop.org/article/10.1088/1742-6596/355/1/012006

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Abstract

The gamma-ray satellite Fermi and the ground based TeV facilities MAGIC, VERITAS and HESS have ushered in a new era in the observation of high-energy emission from active galaxies. The energy budgets of these objects have a major contribution from gamma-rays and it is simply not possible to understand their physics without high-energy observations. Though the exact mechanisms for high-energy production in galaxies remains an open question, gamma-rays typically result from interactions between high-energy particles. Via different interactions these same particles can produce radio emission. Thus the non-thermal nature of gamma-ray emission practically guarantees that high-energy emitters are also radio loud. Aside from their obvious role as a component of multiwavelength analysis, radio observations provide two crucial elements essential to understanding the source structure and physical processes of high-energy emitters: very high timing resolution and very high spatial resolution. A brief overview of the unique role played by radio observations in unraveling the mysteries of the high energy Universe is presented here.