Dr. P. K. Manoharan
Affiliation: Arecibo Observatory, University of Central Florida
About the Speaker.
Manoharan developed a unique method to determine the speed and other physical
properties of the solar wind using interplanetary scintillation (IPS)
measurements from a single radio telescope. He performs space weather studies with
the Arecibo Telescope. His research interests include multi–wavelength studies of
eruptive solar events, physical properties of solar wind, space weather events,
turbulence, pulsars, radio astronomy techniques, etc.
SOLAR WIND STUDIES WITH ARECIBO TELESCOPE
17 Dec 2020
I will review the significance of the interplanetary scintillation (IPS) observations
made with the Arecibo Telescope in the frequency range of ~300 to 3000 MHz.
These observations have been made with the telescope time available during the
current COVID-19 pandemic period and are extremely useful to characterize the
properties of the quiet solar wind (i.e., at the minimum phase between
solar cycles 24 and 25) and some weak solar wind transient events (e.g., coronal
mass ejections and interacting streams) at sun-earth distances between ~10 and 200 solar radii.
Present results emphasis the importance of IPS measurements with a
highly sensitive Arecibo-like radio telescope in understanding: (i) properties of the
solar wind in its acceleration region, (ii) evolution of solar wind in association with
the source region on the Sun, and (iii) physical properties of earth-directed space
weather events. Moreover, IPS studies suggest that the MHD simulation of propagation of coronal
mass ejection (CME) along with the IPS data in the inner heliosphere
can be useful to accurately predict the time of arrival of the CME at the near-Earth space.
Teaser interview w/ Dr. P.K. Manoharan
Jan 28, 2021: Recorded session w/ Dr. P.K. Manoharan