Encyclopedia of Science News LHC Library Video Library Book Club Challenges Children questions Posters Science calendar Science and Law Zhob Science in RuNet Sign up for news of science (in Subscribe.ru) Library N. Resnick Cverchki: A conspiracy of silence Muradova Assimilation or Death? B. Stern hot spot H. Koronovskii "Earth". Chapter from the book Gel'fand logic Kunin N. Resnick ala carte entertainment Ladies prefer chivalry, and not force V. Surdin Science - like a candle in the darkness Yu Black Dairy goat mouse and treatment B. Stern And again about gravitational waves N. Resnick Print sharkskin
Image of the galaxy (indicated ala carte entertainment by a red cross), in which there was a "hybrid" of gamma-ray burst GRB 060614, made by the space telescope "Hubble". However, a supernova "Hubble" in the area, to the surprise of astronomers, not found (picture from the site www.physorg.com. Credit: K.Sharon, A.Gal-Yam, Caltech)
Dec. 21 in the journal Nature has published just four articles devoted to the same astrophysical discovery. In these studies, a summary of the results ala carte entertainment to date results of the analysis of unusual gamma-ray burst GRB 060614, registered the American orbital gamma-ray ala carte entertainment observatory Swift June 14 this year. Gamma-ray bursts (gamma-ray bursts, hence the abbreviation GRB) called short-lived ala carte entertainment bursts of gamma rays coming to Earth from distances of billions of light years. Some of these outbreaks are accompanied ala carte entertainment by X-ray, ultraviolet light, and even the "tails" - the so-called afterglow. This phenomenon has been known for many years, in the spring of 1969.
Gamma-ray bursts ala carte entertainment are not accidentally cause so much interest among researchers ala carte entertainment heaven. They come with a truly gigantic ala carte entertainment distances and at the same time bring to the Earth is not a little energy. This means that the total luminosity of such outbreaks - in other words, the total amount ala carte entertainment of energy released during their birth, - not less than 10 51 -10 52 erg, and perhaps even 10 54 erg. The latter value is approximately equal to the energy that would be released ala carte entertainment in the annihilation of the entire mass of our sun! It is not surprising that such a mighty cosmic cataclysms became the subject ala carte entertainment of scrutiny.
Statistics observations of gamma-ray bursts has long forced scientists to divide them into two classes: "short", with an average duration of about 300 milliseconds, and "long", with a typical duration of two to 20 seconds (but it does happen and minute, and even more extensive - up to half an hour). The average energy (also known as frequency) gamma-ray bursts is much shorter than the energy "dlinnovspyshechnyh" photons.
The nature of gamma-ray bursts is still a matter of dispute. At the moment, no one doubts ala carte entertainment that the gamma-ray bursts of different lengths ala carte entertainment due to various reasons. ala carte entertainment The most plausible version of the origin of long bursts considered generation of hard electromagnetic radiation ala carte entertainment in the last stage of the gravitational collapse of a rapidly rotating supermassive star, which ends the birth of a black hole. The proposed mechanism of this process is quite complex in detail, a description would take up too much space. Suffice it to say that this model satisfactorily explains the origin of both the gamma-ray bursts, as well as their long-wavelength suite. ala carte entertainment From this it follows that the occurrence of bursts of this type must be accompanied by supernova explosions.
The main tool of Space Gamma Ray Observatory Swift - telescope to search byctrogo GRBs BAT - the first defines the coordinates of the burst, then the source of induced other devices. This image GRB 060614 obtained board ray telescope XRT. Afterglow observed in X-rays more than a week after the GRB itself, helped to more accurately determine the position of GRB 060614 in the sky, and it is also able to watch the ground-based telescopes and space telescope "Hubble". Image from www.nasa.gov. Credit: NASA / Swift Team
On the nature of short gamma-ray bursts much less is known. More recently, believed that they are not accompanied ala carte entertainment by persistence, but in May last year, Swift observatory found in one of these X-ray bursts continue. For lack of a better believe ala carte entertainment that short bursts appear to arise in the process of merging neutron stars that orbit around their common center of gravity and gradually approach each other due to the energy ala carte entertainment loss due to the emission of gravitational waves. But there are other hypotheses: the retraction of a neutron star into a nearby black hole or a collision pair of black holes. In this case gives rise to gamma radiation, while it is not known by anybody. In particular, it is unclear why some short gamma-ray bursts ala carte entertainment are sent rays
Image of the galaxy (indicated ala carte entertainment by a red cross), in which there was a "hybrid" of gamma-ray burst GRB 060614, made by the space telescope "Hubble". However, a supernova "Hubble" in the area, to the surprise of astronomers, not found (picture from the site www.physorg.com. Credit: K.Sharon, A.Gal-Yam, Caltech)
Dec. 21 in the journal Nature has published just four articles devoted to the same astrophysical discovery. In these studies, a summary of the results ala carte entertainment to date results of the analysis of unusual gamma-ray burst GRB 060614, registered the American orbital gamma-ray ala carte entertainment observatory Swift June 14 this year. Gamma-ray bursts (gamma-ray bursts, hence the abbreviation GRB) called short-lived ala carte entertainment bursts of gamma rays coming to Earth from distances of billions of light years. Some of these outbreaks are accompanied ala carte entertainment by X-ray, ultraviolet light, and even the "tails" - the so-called afterglow. This phenomenon has been known for many years, in the spring of 1969.
Gamma-ray bursts ala carte entertainment are not accidentally cause so much interest among researchers ala carte entertainment heaven. They come with a truly gigantic ala carte entertainment distances and at the same time bring to the Earth is not a little energy. This means that the total luminosity of such outbreaks - in other words, the total amount ala carte entertainment of energy released during their birth, - not less than 10 51 -10 52 erg, and perhaps even 10 54 erg. The latter value is approximately equal to the energy that would be released ala carte entertainment in the annihilation of the entire mass of our sun! It is not surprising that such a mighty cosmic cataclysms became the subject ala carte entertainment of scrutiny.
Statistics observations of gamma-ray bursts has long forced scientists to divide them into two classes: "short", with an average duration of about 300 milliseconds, and "long", with a typical duration of two to 20 seconds (but it does happen and minute, and even more extensive - up to half an hour). The average energy (also known as frequency) gamma-ray bursts is much shorter than the energy "dlinnovspyshechnyh" photons.
The nature of gamma-ray bursts is still a matter of dispute. At the moment, no one doubts ala carte entertainment that the gamma-ray bursts of different lengths ala carte entertainment due to various reasons. ala carte entertainment The most plausible version of the origin of long bursts considered generation of hard electromagnetic radiation ala carte entertainment in the last stage of the gravitational collapse of a rapidly rotating supermassive star, which ends the birth of a black hole. The proposed mechanism of this process is quite complex in detail, a description would take up too much space. Suffice it to say that this model satisfactorily explains the origin of both the gamma-ray bursts, as well as their long-wavelength suite. ala carte entertainment From this it follows that the occurrence of bursts of this type must be accompanied by supernova explosions.
The main tool of Space Gamma Ray Observatory Swift - telescope to search byctrogo GRBs BAT - the first defines the coordinates of the burst, then the source of induced other devices. This image GRB 060614 obtained board ray telescope XRT. Afterglow observed in X-rays more than a week after the GRB itself, helped to more accurately determine the position of GRB 060614 in the sky, and it is also able to watch the ground-based telescopes and space telescope "Hubble". Image from www.nasa.gov. Credit: NASA / Swift Team
On the nature of short gamma-ray bursts much less is known. More recently, believed that they are not accompanied ala carte entertainment by persistence, but in May last year, Swift observatory found in one of these X-ray bursts continue. For lack of a better believe ala carte entertainment that short bursts appear to arise in the process of merging neutron stars that orbit around their common center of gravity and gradually approach each other due to the energy ala carte entertainment loss due to the emission of gravitational waves. But there are other hypotheses: the retraction of a neutron star into a nearby black hole or a collision pair of black holes. In this case gives rise to gamma radiation, while it is not known by anybody. In particular, it is unclear why some short gamma-ray bursts ala carte entertainment are sent rays
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