Astronomers using the NASA/ESA Hubble Space Telescope have captured an excellent image of the spiral galaxy ESO 422-41 in the constellation Columba.
This Hubble image shows ESO 422-41, a spiral galaxy located in the constellation Columba, about 34 million light-years away. Image credit: NASA / ESA / Hubble / C. Kilpatrick.
ESO 422-41 It is located in the constellation Columba, about 34 million light years away.
DDO 230, LEDA 16864, or UGCA 103, the diameter of this spiral galaxy is 30,000 light years.
“The name ESO 422-41 comes from its appearance in the European Southern Observatory (B) Atlas of the Southern Sky,” Hubble astronomers said.
“In the era before automated sky surveys by space observatories such as ESA's Gaia satellite, large-scale photographic surveys discovered many stars, galaxies, and nebulae.”
“Astronomers used the then most advanced large telescopes to create hundreds of photographs covering parts of the sky.”
“They then studied the resulting photographs and attempted to catalog all the new objects revealed.”
“In the 1970s, a new telescope at ESO's La Silla facility in Chile probed the southern sky, which had not yet been explored as deeply as the northern sky,” they added.
“At that time, the primary technology for recording images was glass plates treated with chemicals.”
“The resulting collection of photographic plates became the ESO (B) Atlas of the Southern Sky.”
“Astronomers from ESO and Uppsala, Sweden, worked together to study the plates and recorded hundreds of galaxies (ESO 422-41 is just one of them), star clusters and nebulae. I was a beginner.”
“Since then, astronomical sky surveys have progressed from digital, computer-aided surveys such as the Sloan Digital Sky Survey (SDSS) and Legacy Survey to surveys performed by space telescopes such as Gaia and the Wide-Field Infrared Survey Explorer (WISE). It has transitioned to
“Nonetheless, photographic sky surveys have made significant contributions to astronomical knowledge over the decades, and the glass plate archive serves as an important historical reference for a wide range of skies. .”
“Some of them are still actively used, for example, to study variable stars over time,” the researchers pointed out.
“And the objects revealed by these surveys, including ESO 422-41, can now be studied in detail with telescopes like Hubble.”
The new images of ESO 422-41 consist of observations from Hubble's advanced survey camera (ACS) in the near-infrared and optical portions of the spectrum.
Two filters were used to sample different wavelengths. Color is obtained by assigning different hues to each monochromatic image associated with an individual filter.
Source: www.sci.news
