Here is NGC 253, aka the Sculptor Galaxy. Sitting pretty at approx 11 million light years away. This is classified as a starburst galaxy because it is in a period of intense star formation. Starbursts are triggered by mergers or 'close-encounters' between galaxies. Tidal interactions can make the galaxies to go a bit wobbly or lopsided causing gas clouds to get slammed and funneled together, igniting new star formation. Studies on NGC 253 indicate a merger, or at the very least some other violent event in it's recent past. Pretty cool! 🌀
It has been discovered that the radio pulsar J0952-0607 also emits pulsed gamma radiation. J0952-0607 spins 707 times in one second and is second in the list of rapidly rotating neutron stars. By analyzing about 8.5 years worth of data from Fermi Gamma-ray Space Telescope.
Pulsars are the compact remnants of stellar explosions which have strong magnetic fields and are rapidly rotating. They emit radiation like a cosmic lighthouse and can be observable as radio pulsars and/or gamma-ray pulsars depending on their orientation towards Earth.
The fastest pulsar outside globular clusters
PSR J0952-0607 (the name denotes the position in the sky) was first discovered in 2017 by radio observations of a source identified by the Fermi Gamma-ray Space Telescope as possibly being a pulsar.
LOFAR identified a pulsating radio source and—together with optical telescope observations—allowed to measure some properties of the pulsar. It is orbiting the common center of mass in 6.2 hours with a companion star that only weighs a fiftieth of our Sun.
The pulsar rotates 707 times in a single second and is therefore the fastest spinning in our Galaxy outside the dense stellar environments of globular clusters.A strange first detection
Our search found a signal, but something was wrong! The signal was very faint and not quite where it was supposed to be. The reason: our detection of gamma rays from J0952-0607 had revealed a position error in the initial optical-telescope
Observations which we used to target our analysis.
Rapidly rotating neutron starsHow fast neutron stars can spin before they break apart from centrifugal forces is unknown and depends on unknown nuclear physicsJ0952-0607 are rotating so rapidly because they have been spun up by accreting matter from their companion.
J0952-0607 has one of the ten lowest magnetic fields ever measured for a pulsar, consistent with expectations from theory.