Top Thai astronomer discovers 13 more low-mass galaxies

The National Institute of Astronomical Research unveils the talents of Thai astronomers, who have discovered 13 more low-mass galaxies with the James Webb Space Telescope, less massive than the Milky Way.

Today (February 1), the NARIT, National Institute for Astronomical Research page posted a message saying: “NARIT researchers have discovered 13 additional low-mass galaxies using the James Webb Space Telescope. Dr. Nisha Litochawalit NARIT Researcher in Cosmology and Theoretical Astronomy Research Group Lead Team From astronomers within the GLASS Collaborative Research Network, using data from the first images from the James Webb Space Telescope, we searched for young galaxies. This occurred when the universe was about 550-700 million years old, about 13,000 million years ago. 13 galaxies have been discovered. ​​Its mass is 10-100 times less than our Milky Way Galaxy, which is another group of less massive galaxies. During this period in the universe, this discovery gives astronomers more information about low-mass galaxies during this time in the universe. Enough to use them in analyzing statistical properties. This research was published in the journal Astrophysical Journal Letters

About 13,000 million years ago, while the universe was about 550-700 million years old, there was a period in which intergalactic matter turned into plasma again, called the era of reionization. In order to understand the evolution of the universe in that era, astronomers need to study galaxies during The age of reionization, including its mass, age, shape, and even mineralogy. Especially low mass galaxies. However, low-mass galaxies are difficult to observe. Because those galaxies are very far from our world. It is very bright, requiring the use of large telescopes such as the James Webb Space Telescope.

In this research, the researchers used the first set of imaging data from the project's James Webb Space Telescope. GLASS-JWST-ERS searches for low-mass galaxies The first set of images were taken using the NIRCam 20-hour observing instrument. The images obtained with this instrument produce images captured through seven filters at infrared wavelengths that cannot be seen with the eye. Abstract. The imaging data, covering wavelengths ranging from 900 to 4,400 nanometers, led to the discovery of 13 new galaxies that are 10 to 100 times less massive than our Milky Way.

When the newly discovered galaxy data is calculated, it turns out that these galaxies produce from 1 to 10 new stars annually, and the average age of the stars within these galaxies ranges between 30 to 200 million years, according to the theories expected by astronomers, in addition to that from the data. Age of galaxies. A spherical body that enables the research team to create a simple mathematical formula. “To estimate the birth rate of new stars, including the mass of galaxies as well.”

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