IAS Gyan

Daily News Analysis

LOFAR

3rd July, 2024 Science and Technology

LOFAR

Source: Wionews

Disclaimer: Copyright infringement not intended.

Context

  • A team of astronomers, led by Shobha Kumar from Midnapore City College in India, has recently discovered a new radio galaxy named J0011+3217 using the LOw-Frequency ARray (LOFAR).
  • This discovery sheds light on the dynamic processes within galaxies and their interactions with surrounding environments.

Details

Radio Galaxy

  • Core Activity:Radio galaxies like J0011+3217 emit significant amounts of radio waves from their central cores.
  • Black Hole Activity:The central black hole accretes gas and dust, generating high-energy jets that propel charged particles at high velocities, creating observable features like jets, lobes, and hotspots.
  • Active Phase:Radio galaxies remain active for up to 100 million years, characterized by visible features such as lobes and jets.
  • Transition:Activity ceases as the galaxy enters a remnant phase, and the active galactic nucleus (AGN) diminishes.

LOw-Frequency ARray (LOFAR)

  • The LOw-Frequency ARray (LOFAR) is a revolutionary radio telescope network designed to observe the universe at low radio frequencies.
  • Operated by the Netherlands Institute for Radio Astronomy (ASTRON), LOFAR is one of the most advanced and versatile radio telescopes in the world.
  • Frequency Range:10 MHz to 240 MHz
  • Location:Primarily located in the Netherlands, with stations across Europe
  • Operational Since:2010
  • Antenna Types:
    • Low-Band Antennas (LBA):Operate from 10 MHz to 90 MHz.
    • High-Band Antennas (HBA):Operate from 110 MHz to 240 MHz.

Sources:

Wionews

PRACTICE QUESTION

Q: Discuss the significance of the LOw-Frequency ARray (LOFAR) in advancing our understanding of the universe. Highlight its major scientific contributions and the impact of international collaboration in its operations. (150 Words)