A new pulsar was born

A new pulsar was born

The supernovae are the most powerful, most destructive, but also among the most important events in the Universe. During the final explosion of a star, in fact, new planets and new forms of life are produced. In addition, type Ia supernovae can be used to determine the distances of galaxies up to a billion light years.

When a star explodes, becoming a supernova, a fairytale energy is released even the light of the entire galaxy in which the dying star is located. The supernova SN 1054, for example, remained visible even during the day for 23 consecutive days and was studied by Arab and Chinese astronomers.

Usually, my degrowth over the days, a new month or a few months, but a supernova in particular, SN 2012AU, sembre just do not get enough even after over six years. For example, persistent exposure indicates that our experience is very simple.

In the case of the SN 2012AU supernova, however, the hydrogen lines in its spectrum were not detected. But what then is the source of energy in this case?

According to Dan Milisavljevic, of the Purdue University, it would be a pulsar. These are neutron stars, originating from the collapse of the supernova nucleus, which possess very intense magnetic fields and rotate on themselves at very high speed.

It is therefore a wind nebula pulsar, or a pulsar organized by a nebula. The first wind nebula pulsar was detected in 1976. These nebulae have a very complex evolution, attention in the first 2,000 years after the supernova explosion and are sources of X-rays and gamma rays. These nebulae tend to dissipate according to astronomers in about 15,000 years.

Thus Milisavljevic commented about this discovery:

If there really is a pulsar wind nebula at the center of the exploded star, it could push from the inside out and even accelerate the gas. If we go back and look at some of these events after a few years and take accurate measurements, we could see the oxygen-rich gas being thrown off the explosion even faster.

You can read the full study on Astrophysical Journal Letters: “Evidence for a Pulsar Wind Nebula in the Type Ib Peculiar Supernova SN 2012au”.


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