Data from the ESA Gaia star mapping satellite

Data From The ESA Gaia Star Mapping Satellite

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Data from the ESA Gaia star mapping satellite, due to the recent mockery of the Milky Way or the ongoing encounter with the satellite galaxy. ESA Gaia star mapping satellite data suggests that the prevailing disks, or wobbles, of our Milky Way also have a maximum spin speed.

The warp revolves around the galactic center faster than expected, completing a turnoff in 600 to 700 million years. However, it is still slower than the speed at which the stars on the disk revolve around the galactic center. For example, the Sun completes a circle in about 220 million years. The speed of the pre-war war led an international team of astronomers to believe it was due to a recent or minor collision with a smaller galaxy.

Our Milky Way is structured with its warped galactic disk, where hundreds of billions of stars live. Data from ESA’s Gaia spacecraft recently demonstrated that disc deformation is the above, essentially similar to a spinning top. Astronomers believe that the rate of deformation is so high that it must have been caused by a powerful event, perhaps due to a continuous collision with another smaller galaxy that is agitated through the disk like a rock thrown into the water.

Image by Stephen Payne-Wardener / NASA / JPL-Caltech / ESA. Our Milky Way is structured along its galactic disk, where hundreds of billions of stars reside. Data from ESA’s Gaia spacecraft recently demonstrated that disc deformation is the above, essentially spinning like a wobbly spinning top.

Astronomers believe that the rate of deformation is so high that it must have been caused by a powerful event, perhaps due to a collision with another smaller galaxy that is stirred through the disk like a rock thrown into the water.

An astronomer at the Astrophysical Observatory in Turin, Drs. Eloisa Poggio and her colleagues measured the precedence rate using 12 million giant stars from another Gaia data publication of the Milky Way mockery.

They found that it is eastward in the direction of galactic rotation at 10.86 3 0.03 (statistic) is 3.20 (systematic) km / s. We measured warp speed by comparing the data with our models, said Dr. Poggio. Depending on the speed reached.

The deformation would complete a detour around the center of the Milky Way in 600 to 700 million years. This is much faster than we expected based on the predictions of other models, such as those that observe the effects of the non-spherical aura.

The precession rate and the magnitude of the warp favor the scenario that the warp is the result of a recent or ongoing encounter with the satellite galaxy rather than a remnant of the history of the former galaxy assembly. Astronomers do not yet know what galaxy can cause the wave or when the collision begins.

One of the contenders is the dwarf galaxy, a small satellite of the Milky Way that is leaving behind a stream of stars as a result of the gravitational pull of our galaxy and is believed to have exploded through galactic disks many times in the past. Astronomers think that Dhanu will be gradually absorbed by the Milky Way. “With Gaia, for the first time, we have a lot of data about a large number of stars.

Whose movement is measured with such precision that we try to understand the mass movement of the galaxy and model the history of its Can formation,” he said. ESA Gaia project deputy scientist, Dr. Jose de Bruijne. “This is something unique. This is actually the Gaia revolution.” As Tana-Bana and its prevalence appear on a galactic scale, scientists assure us that it has no notable effect on life on our planet. “

“The Sun is 26,000 light years away from the galactic center where the width of the warp is very small,” said Dr. Poggio.

“Our measurements were mainly dedicated to the external parts of the galactic disk, up to 52,000 light years from the galactic center and beyond.”

The results appear in the journal Nature Astronomy.

ESA’s Gaia satellite spot flies between high-speed star galaxies. Astronomers who used data from ESA’s Star Mapping Gaia mission to look at the hyper-rolling stars that came out of our Milky Way Galaxy were surprised to find stars instead of turning inwards, perhaps from another galaxy.

20 high-speed stars were surrounded and reconstructed on an artistic view of the Milky Way. The seven stars shown in red extend far beyond the galaxy and travel faster and can eventually escape its gravity. Surprisingly, the study also revealed that thirteen stars appear in orange, rushing towards the Milky Way – these may be stars from another galaxy, which is approaching ours.

20 high-speed stars were surrounded and reconstructed on an artistic view of the Milky Way. The seven stars shown in red extend far beyond the galaxy and travel faster and can eventually escape its gravity. Surprisingly, the study also revealed that thirteen stars appear in orange, rushing towards the Milky Way – these may be stars from another galaxy, which spans across ours. Image credit: NASA / ESA / Hubble / Marketti et al.

The Milky Way has more than one hundred billion stars. Most are on a disk with a dense, bulging center; The rest extend in a very large circular aura. Stars revolve around the Milky Way at hundreds of miles per second, and their movements contain information about the galaxy’s past history.

The fastest class of stars in our galaxy is called hypervelance stars, which are believed to start life near the galactic center and then flow through interaction with the black hole toward the edge of the Milky Way. Only a very small number of hyperlocity stars have been discovered, and Gaia’s second data release offers a unique opportunity to see more of them.

“Of the seven million Gaia stars with fully 3D velocity measurements, we found twenty that can travel fast enough to escape the Milky Way,” said team member Dr. Elena Maria Rossi, an astronomer at the Leiden Observatory.

Leiden Observatory team leader Dr. Tommaso Markheti said: “Instead of flying away from the galactic center, the fastest stars we have seen are rushing towards it.” “These may be stars from another galaxy approaching through the Milky Way.”

These interlactic interpoppers may have come from the Large Magellanic Cloud, a relatively small galaxy orbiting the Milky Way, or they may have originated from an even larger galaxy. If so, they bear the imprint of their point of origin and can provide unprecedented information about the nature of stars in another galaxy, studying them at a much closer distance than their original galaxy.

Dr. Rossi said that “stars can accelerate at high speed when interacting with a supermassive black hole.” “Therefore, the presence of these stars may indicate a black hole in nearby galaxies. But the stars may also be part of a binary system, drifting towards the Milky Way when their stars explode as supernovae. Either way, studying them can give us more information about this type of process in nearby galaxies. “

An alternative explanation is that the newly identified hypervalue stars may be native to our galaxy’s halo, accelerated and pushed through interactions with one of the dwarf galaxies that fall into the Milky Way during their accumulation history may go

Additional information on the age and composition of stars can help astronomers clarify their origins. Dr. “A star in the Milky Way’s halo is quite old and made mostly of hydrogen, while stars in other galaxies can contain many heavy elements,” said Tommaso.

“Looking at the colors of the stars gives us more information about what they are made of.” The findings were published in the Royal Astronomical Society’s monthly notice.

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