Astronomers see a strange “spring” on the spiral arm of the Milky Way

Astronomers see a strange "spring" on the spiral arm of the Milky Way

This illustration is currently our best approximation of what the Milky Way looks like.

This illustration is currently our best approximation of what the Milky Way looks like.
Clarity: NASA / JPL-Caltech

That’s it An unusual “fracture” was found in a nearby galaxy Spiral hand on the ground. Astronomers have never seen anything like this before and are not sure how it got there.

Describes new research published in astronomy and astronomy “High angle structure at the arch arm. Astronomers use this “long slope” to indicate the extreme angle at which they rise. The arch arm of the Milky Way. The newly discovered feature measures 3,000 lightYears (less than 3% of the total galaxy average)), Young stars and gas clouds become stars. The study was co-authored by Michael Kunn, an astronomer at the California Institute of Technology.

Graphic display of the position of the function, a detailed view

Graphic display of the position of the function, detailed view of the “spring” on the front arm.
An image: NASA / JPL-Caltech

It is not easy to map the various activities of our galaxy because we live directly inside this object. As the new document states, “Because of our view from within the disk, it was difficult to connect the individual star formation regions with their larger galaxy atmosphere.”

Fortunately, astronomical instruments and technology can help in this direction. In this case, the information gathered by Spitzer Space T was analyzed by Hill and colleaguesElascope abandoned by NASA only last year. Spitzer discovered infrared light, an instrument suitable for observing newborn stars, which could be obscured by dense clouds of gas and dust (i.e., nebulae). The team focused specifically on data from the Galactic Legacy Infrared Mid-Plain Survey Extraordinary (GLIMPSE) survey.

Gaya also analyzed data from the European Space Agency mission that provided the team with accurate measurements of interstellar distance. This was allowedCreate a 3D view of the arch arm, a prominent spiral arm of the Milky Way.

“When we combine Gia and Spitzer data and finally see this detailed 3D map, we see that there are a lot of complexities in this area that were not previously clear,” NASA’s Conn said. Press release.

A The arched arm is a well-studied component of the Milky Way, and hosts many vast star-forming regions, including the Omega Nebula, the Trifid Nebula, Lake Nebula, and the Eagle Nebula, which contain the famous nebula. . Pillars of work. Scientists for a new study He sought to determine the positions and velocities of the star formation regions on the side of the Sagittarius arm.

The newly discovered structure excels At an angle of approximately 60 degrees. The arm rotates around the Milky Way at an inclination of 12 ((for example, a perfect circle has an inclination of 0). Therefore, the fibula is described as having a high angle structure.

“Ultimately, this reminds us that there is a lot of uncertainty about the vast structure of the Milky Way, and we need to look at the details to understand the overall picture,” explains Robert Benjamin, an astronomer at the university. . From Wisconsin Whitewater and Chief Investigator at GLIMPS.

The authors of the new article are not entirely sure how fluffy substances occur It formed, but it is possible that young stars in this region formed at the same time and in the same place. As close relatives of these brothers, these stars must be affected by the same effects caused by the rotation of the galaxy – forces such as gravity and shear. Improved models based on the distance and speed of the stars can shed light on this new astronomical mystery. Also, Hungarian spirals are generally mysterious.

“This structure is a small part of the Milky Way, but it can tell us something important about the galaxy as a whole,” Benjamin said.

Astronomers have previously observed strange spherical features in other spiral galaxies, including objects. They are called spurs and feathers, some extending vertically from the spiral arms. Spurs are bright spots made up of many stars, while feathers are dusty. The new feature found in the Milky Way is neither of these two features and is therefore considered unique.

Whether there are high-angle structures in our galaxy or anywhere else in the universe is now an open question. The focus will be on future operations, along with further research to confirm the new functionality of the good front infrastructure.

And more: How difficult is the Milky Way?

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