Pulsating Binary: New research reveals it's actually the giant in the room that's beating like a drum
Sandeep K S
Dec 6, 2025
1 min read
Anatomy of a Pulsating Star System: KIC 5623923. This illustration details the complex dynamics of the eclipsing binary star system, highlighting the Delta Scuti-type pulsations originating from the primary star, which exhibits an effective temperature of 8,348 K and a luminosity of 22.4 times that of our Sun. The system features 41 significant frequency pulsations, primarily between 20.0 and 35.0 per day, with the stars tidally synchronized on a 1.21-day orbital period.
What if a galaxy could exist without the brilliant stars that normally make galaxies visible? Cloud-9 may offer astronomers one of the most intriguing examples yet. Located near the spiral galaxy M94,
What if a galaxy could exist without the brilliant stars that normally make galaxies visible? Cloud-9 may offer astronomers one of the most intriguing examples yet. Located near the spiral galaxy M94, this mysterious hydrogen-rich object appears to contain enormous amounts of gas while producing almost no detectable starlight.
Astrophysicists have completed ASTRID, the largest cosmological hydrodynamic simulation ever run, tracing the universe from the cosmic dawn ($z=99$) down to the present day ($z=0$). By resolving 166 billion particles across 815 million light-years, ASTRID unveils how supermassive black holes co-evolve with galaxies and sculpt the cosmic web.
Scientists have uncovered the first robust evidence of a black hole and neutron star crashing together while orbiting in an oval path, challenging long-standing assumptions about cosmic pair formation.
Most neutron star-black hole pairs are expected to adopt circular orbits long before merging, their orbits slowly rounded out by the constant emission of gravitational waves over millions of years.
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