Radio Pulses Trace to White Dwarf in GPM J071507−114153

Researchers traced radio pulses from GPM J071507−114153 to an area near its white dwarf, or possibly the star itself. The binary system pairs the white dwarf with a G-type companion similar to the Sun.

Key details

• The white dwarf rotates about once every eight minutes.
• A survey with the Murchison Widefield Array identified the system; MeerKAT observations refined its position.
• Visible-light observations with the W. M. Keck Observatory supported the companion’s G-type classification.
• Researchers observed flares and a likely magnetic prominence associated with the companion.
• The system is classified as a long-period transient, a type whose radio emissions can switch on and off over minutes or hours.
• The research was reported as published in Nature Astronomy on November 12, 2026.

The white dwarf in GPM J071507−114153 rotates about once every eight minutes.

Why it matters

The observations connect the radio pulses with the white dwarf while also documenting activity in its Sun-like companion. Combining radio measurements from Murchison Widefield Array and MeerKAT with visible-light follow-up from Keck gave researchers complementary views of the system.