Gamma radiation sources

Astronomers counted 65 gamma radiation sources of the unknown nature

Astrophysics carried out census of the objects giving gamma radiation with energy over 10 gigaelectronvolts. Among 514 sources independently stand 65: their nature still isn’t established. Data which allowed to make the new catalog, gathered on an extent of three years with help of the most perfect for today a gamma telescope. The gamma telescope of Fermi represents the specialized detector with help of which it is possible to register quanta with energy to hundred gigaelectronvolts. The authors of the new review emphasize that this energy is much more of that which the previous gamma observatories allowed to register. Many of the objects which have entered into it (the share of the such made 87 percent) were known and earlier, but then scientists didn’t know how these gamma radiation sources will look at supervision in the range over ten gigaelectronvolts. Most of all bright points in the sky left active kernels of galaxies in which supermassive black holes absorb plasma surrounding them. On the second place there are pulsars (quickly rotating neutron stars), and further various objects of other nature: the remains of supernew stars, areas of active formation of new stars, bright blue variable stars and radio galaxies. The greatest interest is represented by the objects which haven’t been included in a body of the table: gamma radiation sources of the unspecified nature. And some of them appeared almost the brightest, in times is brighter than the identified sources. The special attention in the review is given to a problem of registration of gamma radiation sources. According to the catalog, the brightest in the range used for supervision objects gave the smallest number of quanta. On matrixes of the detector of 80х80 centimeters during supervision got no more than one quantum in one working day. At the same time with their registration by the scientist it was required to separate still a useful signal from hindrances and to define the direction on object.


Post navigation