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April 7, 2016
Discovered a giant black hole 17 billion solar masses not far from us. The study published in Nature – This discovery of an international team of astronomers, which appeared in Nature. Even Hubble! Well yes! A black hole record: contains about 17 billion suns and is located in the center of the galaxy NGC 1600 . The discovery by researchers of the ‘ University of California at Berkeley under the Project MASSIVE , thanks to the data of the two jewels of the Earth’s technology: the’ Hubble Space Telescope of the NASA and Gemini Telescope in Hawaii.
NGC 1600 is an elliptical galaxy in the constellation Eridanus.
it identifies two degrees SSW star ν Eridani; it is a giant elliptical galaxy, whose brightness seems weak only because of the great distance. It is visible with a telescope 150mm opening like a nearly oval spot, extended in a north-south; most powerful tools let you find in its surroundings numerous other smaller galaxies, like NGC 1601 and NGC 1603. The distance from the Milky Way is estimated at 220 million light-years.
The observational campaign MASSIVE, begun in 2014, was promoted and supported by the National Science Foundation and the order to obtain mass estimates for stars, dark matter and central blacks holes belonging to 100 massive galaxies and nearby. More specifically, it deals with galaxies with more than 300 billion solar masses, and within 350 million light years away from Earth.
a supermassive black hole (or supermassive) is the largest type of black hole with a mass millions or billions of times that of the sun. it is believed that nearly all galaxies, including our Milky Way, contain a supermassive black hole at their center. CLICK HERE ‘ for direct NASA
“ the black hole supergiant – said the scholar Chung-Pei Ma, a professor at the University of California, as well as head of the observing campaign MASSIVE- is located in a sparsely populated area, the center of an elliptical galaxy located near a small group of 20 galaxies . “the question that assails the researcher and his team is that until now blacks holes this dimension were found only in the center of large galaxies and in populated areas of the Universe.
( the astronomer Chung-Pei Ma of the University of Berkeley)
“ When two galaxies merge explained But-, their central holes blacks stabilize in the nucleus of the new galaxy and orbit around each other. Shooting stars near the black hole binary, depending on their speed and trajectory, they can actually steal bikes from whirling couples and gather enough speed to escape from the nucleus of the galaxy. This gravitational interaction causes the blacks holes move slowly approaching, eventually merging to form a black hole even bigger. The supermassive black hole then continues to grow by swallowing gas channeled to the core by collisions of galaxies. “
it is also interesting to note that the stars rotating around the central core of NGC 1600 are moving as if the hole black belonged to a binary system. I like this are quite common in large galaxies systems, since it is believed that galaxies grow through successive mergers with other galaxies, each of which most likely has a central hole. These blacks holes would then be merged within the nucleus of a new and larger galaxy following a mutual orbital dance, resulting in a bigger black hole and emitting gravitational waves.
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the supermassive blacks holes have some interesting properties that distinguish them from their smaller like:
– the average density (defined as the ratio between black hole mass and volume enclosed within the event horizon) of a supermassive black hole can be the same (for blacks holes 1, 81 × 108 solar masses) or even less than that of water (for blacks holes of greater mass of 1.81 × 108 solar masses). [5] in fact, taking into account that the Schwarzschild radius of a black hole increases linearly with the mass and the volume of a spherical object, such as the event horizon of a black hole not rotating, is proportional to the cube of its radius, the density of the black hole is therefore inversely proportional to the square of its mass; consequently, the density of a black hole rapidly decreases with increasing of its size, and then supermassive holes blacks have lower densities than the smaller ones.
– the typical large tidal forces of the small holes blacks are very weak in the vicinity of the horizon of events: since the gravitational singularity is so far away from the horizon, a hypothetical astronaut who was traveling towards the center of the black hole would experience tidal forces before arriving very significant within the hole.
NASA – Behemoth Black Hole Found in an Unlikely Place
Astronomers have uncovered a record-breaking near supermassive black hole, weighing 17 billion suns, in an unlikely place: in the center of a galaxy in a sparsely populated area of the universe. The observations, made by NASA’s Hubble Space Telescope and the Gemini Telescope in Hawaii, may indicate That These monster objects may be blackberries common than once thought.
Until now, the biggest supermassive black holes – Those roughly 10 billion times the mass of our sun – sono stati found at the cores of very large galaxies in regions of the universe packed with other large galaxies. In fact, the current record holder tips the scales at 21 billion suns and resides in the crowded Coma galaxy cluster That Consists of over 1,000 galaxies … continue
it is thought that most, if not all galaxies are home to a supermassive black hole in their center. The Doppler measurements of the speed of the material (both stellar and gaseous) present at the center of nearby galaxies have revealed the very fast rotation motions, only possible with a large concentration of material in the center. At the time, the only known object that can concentrate enough matter in such a small space is a black hole. In the most distant active galaxies is suspected that the width of the spectral lines is correlated with the mass of the central black hole.
A spectacular evidence regarding the presence of one of these blacks holes extremely large mass at the center of our galaxy has recently obtained directly following the elliptical orbit of a star, by which time you can measure the mass of the alleged black hole with extreme precision.
These supermassive blacks holes at the center of many galaxies are suspected to be the “engine” of active galaxies such as Seyfert galaxies and quasars.
These blacks holes may, however, play an important role in the dynamics of galactic systems in many other cases, as shown by the recent discovery of a correlation between the mass of the central black hole and the velocity dispersion of the stars in the bulge of many spiral galaxies.
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