Publicado em Bulgaria - Entretenimento e interações sociais - 23 Feb 2020 03:27 - 0
SN 1987A е свръхнова, избухнала в покрайнините на мъглявината Тарантула в Големия Магеланов облак, близка галактика-джудже. Избухването е станало на около 51,4 килопарсека (около 168 000 светлинни години) от Земята, достатъчно близо, за да бъде видимо с невъоръжено око в южното полукълбо. Това е най-близката наблюдавана свръхнова след SN 1604, която се появява в самия Млечен път. Светлината от свръхновата достига Земята на 23 февруари 1987 година. Тъй като е първата свръхнова, открита през 1987 г., тя е означена „1987A“. Яркостта ѝ достига върха си през месец май с видима величина от около 3 и бавно намалява през следващите месеци. Това е първата възможност за съвременните астрономи да наблюдават свръхнова отблизо.
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SN 1987A was a type II supernova in the Large Magellanic Cloud, a dwarf galaxy satellite of the Milky Way. It occurred approximately 51.4 kiloparsecs (168,000 light-years) from Earth and was the closest observed supernova since Kepler's Supernova. 1987A's light reached Earth on February 23, 1987, and as the earliest supernova discovered that year, was labeled "1987A". Its brightness peaked in May, with an apparent magnitude of about 3.
It was the first supernova that modern astronomers were able to study in great detail, and its observations have provided much insight into core-collapse supernovae.
SN 1987A provided the first opportunity to confirm by direct observation the radioactive source of the energy for visible light emissions, by detecting predicted gamma-ray line radiation from two of its abundant radioactive nuclei. This proved the radioactive nature of the long-duration post-explosion glow of supernovae.
For over thirty years, the expected collapsed neutron star could not be found, but in 2019 it was announced found using the ALMA telescope.
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SN 1987A was a type II supernova in the Large Magellanic Cloud, a dwarf galaxy satellite of the Milky Way. It occurred approximately 51.4 kiloparsecs (168,000 light-years) from Earth and was the closest observed supernova since Kepler's Supernova. 1987A's light reached Earth on February 23, 1987, and as the earliest supernova discovered that year, was labeled "1987A". Its brightness peaked in May, with an apparent magnitude of about 3.
It was the first supernova that modern astronomers were able to study in great detail, and its observations have provided much insight into core-collapse supernovae.
SN 1987A provided the first opportunity to confirm by direct observation the radioactive source of the energy for visible light emissions, by detecting predicted gamma-ray line radiation from two of its abundant radioactive nuclei. This proved the radioactive nature of the long-duration post-explosion glow of supernovae.
For over thirty years, the expected collapsed neutron star could not be found, but in 2019 it was announced found using the ALMA telescope.
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