NARIT researchers discovered 13 additional low-mass galaxies using the James Webb Space Telescope.

NARIT researchers discovered 13 other low-mass galaxies using the James Webb Space Telescope.

NARIT Page, National Institute for Astronomical Research The publication said NARIT researchers discovered 13 more low-mass galaxies using the James Webb Space Telescope.

Dr. Nisha Litoshawalit is a researcher at NARIT, the Cosmology and Theoretical Astronomy Research Group. Leading a team of astronomers within the GLASS Collaborative Research Network, using data from the first images from the James Webb Space Telescope, we searched for small galaxies. Which happened when the universe was about 550-700 million years old, that is, about 13,000 million years ago. 13 galaxies were discovered with a mass 10-100 times less than our Milky Way Galaxy, which is another group of less massive galaxies. During this time in the universe This discovery gives astronomers more information about low-mass galaxies during this time in the universe. It is sufficient to be used 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, observing low-mass galaxies is difficult. 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. Covers wavelengths between 900 – 4400 nm. The data was obtained from the images and 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.

Prepared by: Dr. Nisha Letuchawalit and Dr. Supachai Avivan, researchers at SDR​

pointing to:…/2023ApJ…942L…/abstract

#JWST #NARIT #NARITResearchoftheMonth #Cosmology

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