Jump To Date
View By Semester
View By Series
Add An Event


Center for Astrophysics Research and Technologies Seminar Series Information

 

Events Calendar

Testing the Nature of Meteor Radio Afterglows

Thursday May 10, 2018
2:00 pm


 Presenter:  Savin Varghese
 Series:  Center for Astrophysics Research and Technologies Seminar Series
 Abstract:  Meteors occur when high velocity, solid material collides with earth's atmosphere, ablates, and ionizes forming a plasma trail. The recent discovery of high frequency (HF; 3-30 MHz) and very high frequency (VHF; 30-300 MHz) radio emission from meteors in 2014 has opened a new window to study meteor physics. The radio emission from meteors was detected at frequencies below 60 MHz using the all-sky imager of the first station of the Long Wavelength Array (LWA1). Follow-up observations revealed that the emission is broadband, has a power law dependence on frequency and typically last for 10-300 seconds.

In this work, we use the newly commissioned LWA -SV station (Sevilleta National Wild Refuge) along with LWA 1 to carry out coordinated observations which will probe the emission mechanism. The combined all-sky observations from LWA1 and LWA-SV have already detected co-observed meteor radio afterglows. The presence of false positives from RFI and scintillation of bright radio sources make the detection of meteor afterglows a difficult process. We triangulate the transients seen at both stations to eliminate false positives and to identify radio afterglows. In this talk, I will focus on how co-observed meteor radio afterglows are used to understand the nature of radio emission by addressing whether they are isotropic or not.
 Host:  Gregory Taylor
 Location:  Room 190, Physics & Astronomy

Disability Notice Individuals with disabilities who need an auxiliary aid or service to attend or participate in P&A events should contact Sandra Ortiz (phone: 505-277-5900, email: sportiz@unm.edu) well in advance to ensure your needs are accommodated. Event handouts can be provided in alternative accessible formats upon request. Please contact Ms. Ortiz if you need written information in an alternative format.