Constraining solar emission radius at 42 MHz during the 2024 total solar eclipse using a student-commissioned radio telescope
Low-frequency solar radio emission is sourced in the solar corona, with sub-100 MHz radio emission largely originating from the $\sim$10$^{5}$\,$\mathrm{K}$ plasma around 2 optical radii. However, the region of emission has yet to be constrained at 35--45\,MHz due to both instrumentation limitations...
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Zusammenfassung: | Low-frequency solar radio emission is sourced in the solar corona, with
sub-100 MHz radio emission largely originating from the
$\sim$10$^{5}$\,$\mathrm{K}$ plasma around 2 optical radii. However, the region
of emission has yet to be constrained at 35--45\,MHz due to both
instrumentation limitations and the rarity of astronomical events, such as
total solar eclipses, which allow for direct observational approaches. In this
work, we present the results from a student-led project to commission a
low-frequency radio telescope array situated in the path of totality of the
2024 total solar eclipse in an effort to probe the middle corona. The
Deployable Low-Band Ionosphere and Transient Experiment (DLITE) is a
low-frequency radio array comprised of four dipole antennas, optimized to
observe at 35--45\,MHz, and capable of resolving the brightest radio sources in
the sky. We constructed a DLITE station in Observatory Park, a dark sky park in
Montville, Ohio. Results of observations during the total solar eclipse
demonstrate that DLITE stations can be quickly deployed for observations and
provide constraints on the radius of solar emission at our center observing
frequency of 42\,MHz. In this work, we outline the construction of DLITE Ohio
and the solar observation results from the total solar eclipse that transversed
North America in April 2024. |
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DOI: | 10.48550/arxiv.2412.07034 |