Scientists Detect Radio Signals from an Exoplanet for the First Time in History
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Advancements in radio astronomy and telescope technology for exoplanetary study: a GS3 Science & Technology topic.
Why in news
Researchers from Harvard and the University of Oregon reported the first-ever unequivocal detection of radio signals from an exoplanet, Beta Pictoris b.
Background
The Beta Pictoris system is located approximately 63 light-years from Earth and contains a star more massive than the sun. The radio waves were detected using the MeerKAT telescope in South Africa and are attributed to magnetic activity in the gas giant planet Beta Pictoris b.
Facts for Prelims
- S&TBeta Pictoris b: A gas giant planet several times larger than Jupiter.
- FactBeta Pictoris system: Located approximately 63 light-years from Earth.
- S&TRadio emissions: Linked to charged particles trapped in a planet's magnetosphere releasing energy during rotation.
Prelims practice question
With reference to the exoplanet Beta Pictoris b, consider the following statements:
- Radio emissions from the planet are attributed to low-intensity solar winds.
- The planet is a gas giant several times larger than Jupiter.
- The planet is located approximately 163 light-years from Earth.
Which of the statements given above is/are correct?
- (a)2 only
- (b)3 only
- (c)1 and 3 only
- (d)1, 2 and 3
Show answer
Answer: (a) 2 only — Statement 2 is correct. Statement 1 is incorrect: The emissions are attributed to intense magnetic activity and charged particles in its magnetosphere. Statement 3 is incorrect: The note states it is located approximately 63 light-years from Earth.
For Mains
Q. Discuss how advancements in radio astronomy and telescope technology are revolutionizing our understanding of exoplanetary magnetospheres and planetary formation.
Dimensions to cover in your answer
- Technological leap: MeerKAT's sensitivity enabling detection of low-frequency radio emissions from distant celestial bodies
- Astrophysical significance: Linking magnetic activity to planetary rotation as a key indicator of exoplanet composition
Keywords: Exoplanet · Magnetosphere · Radio Astronomy · Beta Pictoris · Space Exploration
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