Megamaser: cosmic light show, PgII

Key Highlights:

• Astronomers discovered the most distant hydroxyl maser using the MeerKAT telescope.
• Hydroxyl megamasers are naturally occurring lasers in deep space that focus microwave or radio waves.
• These megamasers are millions of times brighter than masers in the Milky Way.
• The newly found megamaser is billions of lightyears away and magnified by a cosmic lens, named 'gigamaser'.

Detailed Insights:

• Hydroxyl molecules (OH–) in gas clouds within distant galaxies emit powerful radio waves when struck by infrared energy released during galaxy collisions.
• These amplified beams act as cosmic beacons, allowing scientists to study obscured sources, measure galaxy speeds, and understand the universe's evolution.
• The collision of galaxies triggers intense star formation and feeds giant black holes, releasing infrared energy that energizes hydroxyl molecules.

Scientific/Technical Concepts Involved:

• Maser: A device that produces coherent electromagnetic waves through amplification by stimulated emission.
• Hydroxyl Molecule (OH–): A molecule consisting of one oxygen atom and one hydrogen atom.
• Redshift: The displacement of spectral lines toward longer wavelengths in radiation from distant galaxies and celestial objects.