Astronomers report finding hundreds of dead stars pulsating with gamma rays

A group of scientists has announced the release of a third catalog compiled based on data from the Gamma-ray Space Telescope. Fermi. Over 15 years of operation, the telescope has discovered about 300 gamma-ray pulsars since the first such object was discovered in 2008. The resulting pulsar samples could reveal the evolution of stars and help us navigate the universe.

Observations of the sky with the Fermi Global Area Telescope have expanded the catalog of gamma-ray pulsars with 294 previously unknown objects. The new edition of the Gamma Pulsar Catalog includes more than 340 dead stars that emit pulses in this range. This is about 10% of the total number of pulsars in the sky discovered by Earth science (3400), most of which emit within radio range. Although this is not a very impressive sample, the resulting material is enough to shed further light on the evolution of stars. A pulsar is a type of neutron star that emits pulses in one or more regions simultaneously.

They are formed by the collapse of relatively low-mass stars, less than 1.6 to 2.4 solar masses. Stars with more mass turn into black holes. Not all neutron stars become pulsars. More rarely, pulsars only emit in the gamma ray range. “Pulsars touch a wide range of astrophysical research, from cosmic rays and stellar evolution to the search for gravitational waves and dark matter,” says the Bordeaux Astrophysical Institute, part of the French National Center for Scientific Research. said astrophysicist David Smith. CNRS) contributed to the catalog.

Fermi data has become, and will continue to be, a treasure trove of information for the full range of scientific research in astronomy. Gamma-ray pulsars with millisecond pulses are also suitable for space navigation. They can serve as a kind of beacon for flight into space. Cataloging such objects creates the basis for planning routes within the solar system with maximum precision. The new catalog includes 144 of them. Finally, observations of pulsars can be used to detect gravitational waves. Such waves of many events distort the fabric of space-time, which is reflected in the pulsar’s time dilation.