First-Year Results of SALSA: Survey of extragALactic magnetiSm with SOFIA
Event date
-
Speaker
Enrique López-Rodriguez
Affiliation
KIPAC Stanford
Location
Online
Event Type
Teletalk

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SOFIA is key to providing a complete picture of extragalactic magnetism by doing what only HAWC+ can observe: magnetic fields (B-fields) in the densest regions of the universe. I will present a summary of the first-year results of the Survey of extragALactic magetiSm with SOFIA (SALSA). Using SOFIA/HAWC+, the extragalactic B-fields are measured by means of magnetically aligned dust grains in the dense interstellar medium (ISM) in a sample of 18 nearby galaxies. In addition, SALSA performs a multi-wavelength analysis using neutral (HI) and molecular (CO) gas observations to trace and compare the gas velocity fields with the B-fields in the diffuse and dense ISM using radio and far-infrared polarimetric observations, respectively. We find that all the observed galaxies are permeated by large-scale ordered B-fields in the dense and cold ISM. Specifically, we have detected 1) spiral large-scale B-fields across the galactic disk of spiral galaxies, 2) ordered B-fields in merger galaxies, 3) B-fields along the outflows of the starburst galaxies permeating the circumgalactic medium with astrophysical B-fields, and 4) a magnetically-driven flow towards active nuclei. These results open a new window of exploration on galaxy evolution.

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