Discovery of Cosmic Signals Linked to Unique Star System
Student Astronomer Identifies Source of Mysterious Cosmic Signals
Universe Today
Image: Universe Today
An international team has identified a binary star system, ASKAP J1745−5051, using the Australian Square Kilometer Array Pathfinder telescope. This system, consisting of a white dwarf and a red dwarf, is linked to long-period radio transients, confirming their source after two decades of research.
- 01ASKAP J1745−5051 is a binary system with a white dwarf and a red dwarf star, orbiting every 1.4 hours.
- 02The system emits powerful bursts of radio waves and X-rays due to material accretion from the red dwarf.
- 03This discovery confirms the source of long-period radio transients, previously a mystery for over 20 years.
- 04The research team included PhD student Kovi Rose and collaborators from multiple global institutions.
- 05ASKAP J1745−5051 is only the second known long-period radio transient to emit X-rays regularly.
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An international research team has successfully identified the source of long-period radio transients (LPTs) using the Australian Square Kilometer Array Pathfinder (ASKAP) telescope. The binary star system, named ASKAP J1745−5051, consists of a white dwarf and a red dwarf star, orbiting each other every 1.4 hours. As material from the red dwarf spirals onto the white dwarf, it generates intense bursts of radio waves and X-rays. This discovery marks a significant breakthrough in understanding LPTs, which have puzzled astronomers for over two decades. The research team, led by PhD student Kovi Rose from the University of Sydney and CSIRO, confirmed that the source of these signals is a 'cataclysmic variable', an accreting white dwarf star. The findings suggest that the radio and X-ray emissions originate from different regions in the system, providing a unique opportunity to study extreme physics. The team plans to further investigate ASKAP J1745−5051 through combined radio, optical, and X-ray observations, aiming to enhance the understanding of this new class of cosmic events.
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