Breakthrough Discovery: Origin of Enigmatic Radio Signals Unveiled

WHO:

Space.com - Kovi Rose, a postgrad student at the University of Sydney, led the research.

Yahoo - The research involved the Australian SKA Pathfinder (ASKAP) radio telescope and was conducted by radio astronomers in Australia.

WHAT:

Space.com - The source of long-period radio transients has been identified as the clash of magnetic fields between a white dwarf and a red dwarf star.

Yahoo - Long-period radio transients produce radio waves in bursts lasting from minutes to over an hour, unlike most radio-producing objects that release bursts lasting seconds or less.

Yahoo - The system catalogued as ASKAP J1745-5051 features a white dwarf with a diameter similar to Earth and a mass comparable to that of the sun, accreting matter from a red dwarf star with a mass one-tenth that of the sun.

WHERE:

Space.com - The ASKAP radio telescope is located at the CSIRO Murchison Radio-astronomy Observatory on Wajarri Yamaji Country in Western Australia.

WHEN:

Yahoo - The long-period radio transients were discovered in 2005.

WHY:

Space.com - The research aims to explain the origin of long-period radio transients, which have puzzled astronomers for years.

HOW:

Yahoo - The white dwarf and red dwarf stars have their own intrinsic magnetic fields, and their elliptical orbit causes their magnetic fields to clash, stripping charged particles from each other's surfaces and producing synchrotron radiation.

Space.com - The orbital motion of the system takes just 1.4 hours to complete, and the radio bursts last for the duration that the magnetic fields are in contact, occurring every 1.4 hours.

(UPDATED June 3, 2026 16:32 UTC)

A team of radio astronomers in Australia, led by postgrad student Kovi Rose from the University of Sydney, has identified the source of long-period radio transients as the clash of magnetic fields between a white dwarf and a red dwarf star. This unique system, catalogued as ASKAP J1745-5051, features a white dwarf about the size of Earth and a red dwarf with a mass one-tenth that of the sun, producing bursts of radio waves that last from minutes to over an hour every 1.4 hours due to their elliptical orbit. The research, conducted using the Australian SKA Pathfinder radio telescope at the CSIRO Murchison Radio-astronomy Observatory in Western Australia, aims to unravel the mystery surrounding these puzzling radio emissions that have intrigued astronomers since their discovery in 2005.