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Astronomers have discovered a strangely massive black hole in a nearby galaxy

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Astronomers have discovered a strangely massive black hole in a nearby galaxy

ESA / Gaia / DPAC; SDSS

Burako Negro – Leo I.

Astronomers at the University of Texas’ MacDonald Observatory at Austin have discovered an unusually massive black hole at the center of one of the Milky Way’s dwarf satellite galaxies, named Leo I.

This discovery, almost as massive as a black hole in our galaxy, could redefine our understanding of how all galaxies – the building blocks of the universe – evolve. work was published by in a recent issue of the Astrophysical Journal.

The team decided to study Leo I am because of its peculiarity. Unlike most dwarf galaxies orbiting the Milky Way, Leo I does not contain much dark matter.

investigators measured the profile of dark matter Leo I – That is, how the density of dark matter changes from the outer edges of the galaxy towards the center.

They did this by measuring their gravitational attraction towards the stars: the faster the stars move, the more matter is trapped in their orbits. Specifically, the team wanted to know if the density of dark matter is increasing towards the center of the galaxy.

They also wanted to know if their profile would be measured. compatible with previous received using data from old telescopes in combination with computer models.

The team, led by the recent Ph.D. from the University of Texas at Austin, Maria Jose Bustamante, includes astronomers Eva Noyola, Karl Gebhardt and Greg Seimann from the same institution, as well as colleagues from the Max Planck Institute for Extraterrestrial Physics in Germany.

For their observations, they used a unique instrument called VIRUS-W, mounted on the 2.7-meter Harlan J. Smith telescope located at the MacDonald Observatory.

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When the team submitted their augmented data and complex models in a supercomputer at the University of Texas Advanced Computing Center at Austin, got an amazing result.

“Models are screaming that we need a black hole in the center; we really don’t need a lot of dark matter, ”Gebhardt said. “We have a very small galaxy that is falling into the Milky Way, and its black hole is almost as massive as the Milky Way.… The mass ratio is absolutely enormous. The Milky Way dominates; the black hole of Leo I is almost comparable. ” The result is unprecedented.

The researchers said the result was different from previous Leo I studies due to a combination of more accurate data and better simulations on a supercomputer.

Dense central region of the galaxy remained practically unknown in previous studies that focused on the speed of individual stars. Current research has shown that for the few speeds obtained in the past, there was a bias towards lower speeds. This, in turn, reduced the estimated amount of matter trapped in their orbits.

New data are concentrated in the central region and are not subject to this bias. The amount of putative matter trapped in the orbits of stars has skyrocketed.

The discovery could undermine astronomers’ understanding of galactic evolution because “there is no explanation for this type of black hole in dwarf spheroidal galaxies, ”said Bustamante.

The result is even more important because astronomers have used galaxies like Leo I to be classified as galaxies. “dwarf spheroidal galaxy”“20 years ago to understand how dark matter is distributed in galaxies,” added Gebhardt. This new type of black hole fusion is also giving gravitational wave observatories a new signal to watch out for.

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“If the mass of a Leo I black hole is large, that could explain how black holes grow in massive galaxies,” Gebhardt said. This is because over time, as small galaxies like Leo I fall into larger galaxies, the black hole of the smaller galaxy merges with the black hole of the larger galaxy, increasing its mass.

Created by a team from the Institute for Extraterrestrial Physics. Max Planck in Germany, the VIRUS-W is the only device in the world capable of currently performing studies of dark matter profiles of this type.

Noyola noted that many of the dwarf galaxies observed from the southern hemisphere are good candidates, but no telescope in the southern hemisphere is equipped for this. However, the GMT (Giant Magellanic Telescope) currently under construction in Chile was partly designed for this kind of work. The University of Texas at Austin is a Founding Partner of GMT.

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The new European Samsung Galaxy S22 will be equipped with an Exynos 2200 processor

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The new European Samsung Galaxy S22 will be equipped with an Exynos 2200 processor

As the date of the announcement of the new Samsung Galaxy S22 family of smartphones approaches, publications begin to appear on social networks, which in some way confirm many of the rumors that have appeared.

One of the most pressing doubts is related to the new SoC (System-on-Chip) from Samsung. new exynos 2200, which features the new Xclipse 920 graphics controller using the AMD RDNA2 architecture.

According to this Twitter post, which lists the SoCs that will be distributed across different regions, it was created with firmware development in mind, which is being created for the new Galaxy S22.

If proven, the European continent will be the only region where the new Exynos 2200 will be exclusive, and the markets where both SoCs are available, such as Africa, the Middle East, and Southwest Asia, the rest will be Snapdragon 8 Gen1 exclusive. . . .

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Horizon Chase Gets New China Spirit DLC – Mobile Gamer

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Horizon Chase Gets New China Spirit DLC - Mobile Gamer

Horizon Chase, one of best offline racing games per android e iOS it has a new update. The update brought a new DLC called Chinese spirit, which includes cars and new tracks. The price of new content is 10.99 reais.

The DLC is exclusive to the mobile version of Horizon Chase.

as it happened in other years, Aquiris releases an exclusive mobile update to celebrate the Chinese New Year. Chinese New Year is celebrated on February 1st.

This update comes with a new Lightning car (signs?) that looks like a Tesla. This car is also equipped with an electric motor in the game. The pack includes 4 unique coloring pages and 9 new tracks.

Watch the update trailer.

About chasing the horizon

Originally released in 2015, Horizon Chase is still being updated to this day (24). The racing game is one of the main games of the genre and one of the best offline racing games for mobile phones.

Created as a tribute to such classics as Top Gear (SNES), Out Run (Mega Drive) and Lotus Turbo Challenge (Amiga, the eternal “father of Top Gear”). Three super classics from the 90s, Horizon Chase also features Amazing DLC ​​with the eternal idol tracks Airton Senna.

A complete offline oriented game with so much content that it also ended up on PC and consoles. Horizon Chase is a must. A game that will appeal to both the generation that grew up on old consoles and the youth who like games that do not require the Internet.

Download links: ANDROID | iOS

Developer: Aquiris
Advertising: No | Offline game
Contains in-app purchases: only one
Requires Android 4.0 / iOS 7.1
Language: Portuguese | Size: 530 MB

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The James Webb Telescope arrived today at L2, its destination in orbit around the Sun – 01/24/2022

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The James Webb Telescope arrived today at L2, its destination in orbit around the Sun - 01/24/2022

Nearly a month after launch, the James Webb Space Telescope will arrive today (24) at its deep space destination. According to NASA, the telescope’s thrusters are due to fire on Monday afternoon, when the giant is put into orbit around the Sun.

Released December 25James Webb will enter orbit at a point known as Lagrange 2 (or L2), about 1.5 million kilometers from Earth. This distance is four times greater than the distance between our planet and the Moon. At this point, the gravitational forces of the Earth and the Sun cancel each other out, forcing the object to stay there effortlessly and using a minimum of fuel.

Once in his new home, millions of miles from Earth, Webb will complete instrument testing and calibration procedures before he goes to work. Work is only scheduled to begin in June 2022, a date that should also mark the delivery of the first images taken by the telescope.

NASA will not broadcast James Webb’s arrival at his new home in space. However, the agency plans several follow-up live broadcasts after completing an important part of the mission.

Starting at 5:00 pm (Brazil time), the agency will host a live broadcast with scientists and engineers working on the Webb project. The broadcast will be NASA Science Live as well as their profiles on YouTube, facebook e Twitter.

During the live broadcast, viewers will be able to ask questions using the hashtag #UnfoldtheUniverse or leave comments on facebook or on youtube.

Amber Strawn, Associate Communications Specialist for the Webb Project at NASA’s Goddard Space Flight Center, and Scarlene Hernandez, Flight Systems Engineer at the Space Telescope Science Institute, will talk about the telescope’s journey and answer questions from netizens.

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The live broadcast will be followed by a press conference, also broadcast on the agency’s website.

Mission

The mission of the James Webb Telescope is to better understand the early stages of the formation of our Universe, to observe and discover distant exoplanets, and to try to answer questions such as: How fast is the Universe expanding?

The telescope, with a $10 billion investment, is the successor and collaborator of the Hubble telescope launched in 1990. Both were created for observation in deep space, that is, astronomical objects that are very far from the Earth. But while Hubble is detecting ultraviolet light and the visible elements of the electromagnetic spectrum, the novice will be able to see space in the infrared spectrum – invisible to the naked eye.

James Webb will be able to take pictures beyond the nebulae — clouds of gas and dust — that are the strength of his predecessor, and he will be able to show where stars are born. Thus, it complements the existing information.

In addition, Hubble will be able to look 400 million years after the Big Bang, and James Webb will allow us to observe the first galaxies formed about 100 million years after this phenomenon. Thanks to this, scientists will be able to better understand the conditions for the origin of the universe.

The researchers also intend to use the telescope to study the supermassive black holes that appear to occupy the centers of distant galaxies.

Last stage

With the arrival of James Webb at point L2, the mission comes to the last leg of the journey. During the 30 days that the telescope followed its orbital point, it completed the relevant assembly steps without much trouble.

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In early January, the telescope passed the most difficult stage fully open the heat shield, a five-tier umbrella measuring 20 by 14 meters – the size of a tennis court.

This equipment is necessary for observing space and is important for protecting scientific instruments from the heat of the sun and radiation emitted by the Earth and the Moon. Shortly thereafter, Webb achieved his goal. final configuration completing the “unrolling” of their mirrors two weeks after launch.

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