February 29, 2024

Astronomers Map the Movement of White Dwarfs of the Milky Way

In a research study published in the journal Monthly Notices of the Royal Astronomical Society, a research study team can present new findings of how the collapsed stars move.
Illustration of Gaia with the Milky Way in the background. Gaia is an ambitious mission to chart a three-dimensional map of our Galaxy, the Milky Way, while doing so exposing the structure, development and evolution of the Galaxy. Credit: ESA– D. Ducros, 2013.
” Thanks to observations from the Gaia area telescope, we have for the first time handled to expose the three-dimensional speed distribution for the biggest catalog of white dwarfs to date. This gives us an in-depth image of their speed structure with exceptional detail,” says Daniel Mikkola, doctoral trainee in astronomy at Lund University.
Thanks to Gaia, researchers have actually determined positions and velocities for about 1.5 billion stars. But just recently have they been able to completely concentrate on the white overshadows in the Solar neighborhood.
” We have actually handled to map the white overshadows velocities and motion patterns. Gaia revealed that there are 2 parallel sequences of white overshadows when looking at their temperature level and brightness. If we study these separately, we can see that they move in different ways, probably as an effect of them having various masses and lifetimes,” says Daniel Mikkola.
The outcomes can be used to develop brand-new simulations and designs to continue to map the history and advancement of the Milky Way. Through an increased understanding of the white dwarfs, the researchers intend to have the ability to correct a number of concern marks surrounding the birth of the Milky Way.
” This research study is necessary due to the fact that we discovered more about the closest areas in our galaxy. The outcomes are also fascinating because our own star, the Sun, will one day become a white dwarf similar to 97 percent of all stars in the Milky Way,” concludes Daniel Mikkola.
Recommendation: “The speed distribution of white dwarfs in Gaia EDR3 ″ by Daniel Mikkola, Paul J McMillan, David Hobbs and John Wimarsson, 22 February 2022, Monthly Notices of the Royal Astronomical Society.DOI: 10.1093/ mnras/stac434.

This illustration is an artists impression of the thin, rocky debris disc discovered around the two Hyades white overshadows. Rocky asteroids are believed to have actually been annoyed by worlds within the system and diverted inwards towards the star, where they broke up, circled around into a debris ring, and were then dragged onto the star itself. Credit: NASA, ESA, STScI, and G. Bacon (STScI).
When typical stars comparable to the Sun however then collapsed after tiring all their fuel, White overshadows were. Historically, these interstellar remnants have been challenging to study. A current research study from astronomers at Swedens Lund University, nevertheless, exposes new details about the movement patterns of these perplexing stars.
White dwarfs have a radius of about 1 percent that of the Suns. They have approximately the very same mass, which indicates they have an impressive density of about 1,000 kg (2,200 pounds) per cubic centimeter. After billions of years, white dwarfs will cool off to a point where they no longer release visible light, and transform into so-called black dwarfs.
40 Eridani A was the first white dwarf discovered. It is a brilliant celestial body 16.2 light-years far from Earth, surrounded by a binary system consisting of the white dwarf 40 Eridani B and the red dwarf 40 Eridani C. Ever because it was discovered in 1783, astronomers have actually attempted to find out more about white overshadows in order to gain a much deeper understanding of the evolutionary history of our home galaxy.

White dwarfs were as soon as typical stars comparable to the Sun however then collapsed after exhausting all their fuel. White overshadows have a radius of about 1 percent that of the Suns. After billions of years, white overshadows will cool down to a point where they no longer produce visible light, and change into so-called black overshadows.
” We have handled to map the white overshadows speeds and motion patterns. Gaia exposed that there are two parallel series of white overshadows when looking at their temperature level and brightness.