- Conference date: 12−14 Oct 1992
- Location: College Park, Maryland (USA)
A critical question in the study of the dynamics of our own galaxy is whether the cosmic rays are galactic or universal. Diffuse gamma ray emission from the Magellanic Clouds allows us to carry out studies of the cosmic ray distribution in these external galaxies and in turn permit us to answer the question on the origin of cosmic rays in our own galaxy. These gama rays are believed to be produced primarily through the interaction of cosmic rays with interstellar matter. Hence, combined with a knowledge of the interstellar matter distribution, they can provide a direct measure of the cosmic ray density. Results of a model calculation assuming quasi‐stable equilibrium between cosmic rays, magnetic fields, and interstellar gas, are presented and compared with recent data from the Energetic Gamma Ray Experiment Telescope (EGRET) aboard the Compton Observatory. On the important question of whether the origin of the bulk of cosmic rays is galactic or extragalactic, a definitive test of the universality of cosmic rays can be accomplished through the measurement of the high energy gamma ray emission from the SMC and the LMC. The results obtained from the EGRET on the Magellanic Clouds clearly resolves this debate in favor of a galactic origin.
- Cosmic rays
- Cosmic gamma ray sources
- Galactic cosmic rays
- Magellanic Clouds
- Galactic dynamics
Daniel Baumann, Mark G. Jackson, Peter Adshead, Alexandre Amblard, Amjad Ashoorioon, Nicola Bartolo, Rachel Bean, Maria Beltrán, Francesco de Bernardis, Simeon Bird, Xingang Chen, Daniel J. H. Chung, Loris Colombo, Asantha Cooray, Paolo Creminelli, Scott Dodelson, Joanna Dunkley, Cora Dvorkin, Richard Easther, Fabio Finelli, Raphael Flauger, Mark P. Hertzberg, Katherine Jones‐Smith, Shamit Kachru, Kenji Kadota, Justin Khoury, William H. Kinney, Eiichiro Komatsu, Lawrence M. Krauss, Julien Lesgourgues, Andrew Liddle, Michele Liguori, Eugene Lim, Andrei Linde, Sabino Matarrese, Harsh Mathur, Liam McAllister, Alessandro Melchiorri, Alberto Nicolis, Luca Pagano, Hiranya V. Peiris, Marco Peloso, Levon Pogosian, Elena Pierpaoli, Antonio Riotto, Uroš Seljak, Leonardo Senatore, Sarah Shandera, Eva Silverstein, Tristan Smith, Pascal Vaudrevange, Licia Verde, Ben Wandelt, David Wands, Scott Watson, Mark Wyman, Amit Yadav, Wessel Valkenburg and Matias Zaldarriaga
Data & Media loading...
Article metrics loading...