Synchrotron radiation from molecular clouds

A. W. Strong, C. Dickinson, E. J. Murphy

Research output: Contribution to journalConference articlepeer-review


Observations of the properties of dense molecular clouds are critical in understanding the process of star-formation. One of the most important, but least understood, is the role of the magnetic fields. We discuss the possibility of using high-resolution, high-sensitivity radio observations to measure the in-situ synchrotron radiation from these molecular clouds. If the cosmic-ray (CR) particles penetrate clouds as expected, then we can measure the B-field strength directly using radio data. So far, this signature has never been detected from the collapsing clouds themselves and would be a unique probe of the magnetic field. Dense cores are typically ∼ 0.05 pc in size, corresponding to ∼arcsec at ∼kpc distances, and flux density estimates are ∼ mJy at 1 GHz. They should be detectable, for example with the Square Kilometre Array.

Original languageEnglish
JournalProceedings of Science
Publication statusPublished - 1 Jan 2014
Event2014 Cosmic Rays and the InterStellar Medium, CRISM 2014 - Montpellier, France
Duration: 24 Jun 201427 Jun 2014


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