NASA CURIE – SCIENCE & TECHNOLOGY
News: NASA launched
the CubeSat Radio Interferometry Experiment (CURIE) to study the origins of
radio waves emanating from the Sun.
What’s in the News?
This mission, utilizing low frequency radio
interferometry, aims to address the mysterious origins of solar radio
emissions, particularly those linked to solar flares and coronal mass ejections
(CMEs).
Mission Goals
- Investigate Solar Radio Waves: CURIE
aims to pinpoint the exact origin of radio waves within CMEs, a phenomenon
observed decades ago but not fully understood.
- Study Solar Flares and CMEs: By
measuring radio waves linked to solar flares and CMEs, CURIE will enhance
our understanding of these solar events and their impact on space weather.
- Advance Radio Astronomy: CURIE's
use of low frequency radio interferometry in space is a pioneering
technique that could set the stage for future missions in radio astronomy.
Scientific and Technological Significance
- Space Weather:
Improved knowledge of solar radio waves can help predict and mitigate the
effects of space weather on satellite communications and Earth-based
technologies.
- Pathfinder Mission: CURIE
is considered a pathfinder for space-based radio astronomy, demonstrating
innovative techniques that could be used in future scientific missions.
- Enhanced Observations:
Operating above Earth's atmosphere allows CURIE to measure radio
frequencies that are otherwise blocked, providing clearer and more
detailed data about solar emissions.
Sun's Radio Waves
- The Sun is a prolific source of radio waves, emitting a wide range
of frequencies that reveal much about its structure and activity.
Types of Solar Radio Emissions
- Thermal Bremsstrahlung Emission:
·
Produced when free electrons in the solar corona
are deflected by ions, causing them to emit radiation.
·
Main source of the Sun's quiescent radio emission,
especially below 300 MHz due to typical coronal densities.
·
Emission frequency relates to the electron density
in the plasma.
- Gyromagnetic Emission:
·
Occurs when electrons spiral around magnetic field
lines, resulting in emissions known as gyroresonance and gyrosynchrotron.
·
Gyroresonance is prominent in the chromosphere,
producing microwave radiation in the GHz range.
·
Gyrosynchrotron is associated with microwave radio
bursts from the chromosphere and coronal radio bursts.
- Plasma Emission:
·
Responsible for most solar radio bursts,
originating from electron density oscillations (Langmuir waves).
Accelerated by magnetic reconnection or shock waves, these bursts can exceed background radiation significantly.
Source: https://www.indiatoday.in/science/story/nasas-curie-to-investigate-the-origin-of-suns-radio-waves-2564210-2024-07-09