PARTICLE ACCELERATION IN PROTOSTELLAR JETS: an observational approach

CARRASCO-GONZÁLEZ, C.; ADRIANA R., RODRÍGUEZ K.

Sant Cugat

Workshop; Workshop on Polarization in Protoplanetary Disks and Jets; 2019

Institut de Ciències de l'Espai, CSIC

Deeplyembedded protostellar jets are well known to be dominated by theemission of thermal electrons. Interestingly, in the last decades,negative spectral indices have been detected at centimeterwavelengths in some protostellar jets, indicating the presence of anon-thermal component. Detecting non-thermal emission implies theexistence of a population of relativistic particles interacting withmagnetic fields, and therefore, the action of a mechanism able toaccelerate them efficiently. Which are the conditions needed toaccelerate these particles, and where might they be met? To answerthese questions we studied the radio continuum emission of tworepresentative YSOs having different masses: (1) The triple source inSerpens (intermediate mass); (2) The system HH 80-81 (high mass),being one of the most powerful protostellar jets known, and the onlyone (to date) for which linearly polarized centimeter emission hasbeen detected. In this talk I will discuss theconditions needed to produceefficient particle acceleration in protostellarjets, based on the analysis of highsensitivity multi frequency radio continuum images obtained with theKarl G. Jansky Very Large Array.p { margin-bottom: 0.1in; line-height: 120%; }