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Am 26. Mai 2020 registrierte das Swift Observatorium den besonders intensiven Gamma Ray Burst GRB 200522A
Auf die Nachricht unterbrachen mehrere Observatorien ihr reguläres Beobachtungsprogramm, um an der berichteten Position nachzuschauen. Dazu gehörte auch das Hubble Space Telescope, welches ein starkes Signal im nahen Infrarot registrierte:
The Broad-band Counterpart of the Short GRB 200522A at z = 0.5536: A Luminous Kilonova ...
Die Interpretation läuft darauf hinaus, dass man die Verschmelzung (Merger) zweier Neutronensterne zu einem Magnetar beobachtet hat:
Birth of a magnetar from neutron star merger (Animation)
This image shows the glow from a kilonova caused by the merger of two neutron stars. The merger of the neutron stars is believed to have produced a magnetar, which has an extremely powerful magnetic field.
Credit: NASA, ESA, W. Fong (Northwestern University), and T. Laskar (University of Bath, UK)
This illustration shows the sequence for forming a magnetar-powered kilonova, whose peak brightness reaches up to 10,000 times that of a classical nova. 1) Two orbiting neutron stars spiral closer and closer together. 2) They collide and merge, triggering an explosion that unleashes more energy in a half-second than the Sun will produce over its entire 10-billion-year lifetime. 3) The merger forms an even more massive neutron star called a magnetar, which has an extraordinarily powerful magnetic field. 4) The magnetar deposits energy into the ejected material, causing it to glow unexpectedly bright at infrared wavelengths.
Credit: NASA, ESA, and D. Player (STScI)
Neutron star merger results in magnetar with brightest kilonova ever observed
Auf die Nachricht unterbrachen mehrere Observatorien ihr reguläres Beobachtungsprogramm, um an der berichteten Position nachzuschauen. Dazu gehörte auch das Hubble Space Telescope, welches ein starkes Signal im nahen Infrarot registrierte:
The Broad-band Counterpart of the Short GRB 200522A at z = 0.5536: A Luminous Kilonova ...
Die Interpretation läuft darauf hinaus, dass man die Verschmelzung (Merger) zweier Neutronensterne zu einem Magnetar beobachtet hat:
Birth of a magnetar from neutron star merger (Animation)
This image shows the glow from a kilonova caused by the merger of two neutron stars. The merger of the neutron stars is believed to have produced a magnetar, which has an extremely powerful magnetic field.
Credit: NASA, ESA, W. Fong (Northwestern University), and T. Laskar (University of Bath, UK)
This illustration shows the sequence for forming a magnetar-powered kilonova, whose peak brightness reaches up to 10,000 times that of a classical nova. 1) Two orbiting neutron stars spiral closer and closer together. 2) They collide and merge, triggering an explosion that unleashes more energy in a half-second than the Sun will produce over its entire 10-billion-year lifetime. 3) The merger forms an even more massive neutron star called a magnetar, which has an extraordinarily powerful magnetic field. 4) The magnetar deposits energy into the ejected material, causing it to glow unexpectedly bright at infrared wavelengths.
Credit: NASA, ESA, and D. Player (STScI)
Neutron star merger results in magnetar with brightest kilonova ever observed