Astronomers utilizing the NASA/ESA Hubble Space Telescope have captured remarkable new images of the Dwarf Starburst Galaxy NGC 4449.
This Hubble image illustrates NGC 4449, a galaxy of dwarf stars located roughly 12.5 million light years away within the Canes constellation. Image credits: NASA/ESA/Hubble/E. Sabbi/D. Calzetti/A. Aloisi.
NGC 4449 is situated about 12.5 million light years away in the constellation of Canes.
Also known as Caldwell 21, Leda 40973, or UGC 7592, this galaxy is approximately 20,000 light-years in age.
NGC 4449 was first identified by German-born British astronomer William Herschel on April 27, 1788.
This galaxy is part of the M94 Galaxy group and is in close proximity to the local group that contains our Milky Way.
“NGC 4449 is a dwarf galaxy, meaning it is significantly smaller than our Milky Way and contains fewer stars,” a Hubble astronomer remarked.
“However, its small size is deceptive; NGC 4449 is prolific in star formation.”
“This galaxy is referred to as a Starburst galaxy because it produces new stars at a rate much higher than would be expected for its size.”
“While most Starburst Galaxies primarily produce stars in their centers, NGC 4449 is scattered with bright young stars throughout its structure.”
Astronomers believe this global surge in star formation has resulted from interactions between NGC 4449 and its neighboring galaxies.
“Due to its proximity, NGC 4449 offers a valuable opportunity for Hubble to investigate how intergalactic interactions influence new star formation,” they noted.
The new color image of NGC 4449 is derived from Hubble observations utilizing the Advanced Cameras for Surveys (ACS) and the Widefield Camera 3 (WFC3) across the UV, near-infrared, and optical segments of the spectrum.
Seven filters were employed to capture various wavelengths, assigning different hues to each monochrome image linked to the specific filters.
“The Hubble images of NGC 4449 were previously released in 2007,” the researchers stated.
“This updated version includes several additional wavelengths of light gathered by Hubble through multiple observational programs.”
“These programs encompass groundbreaking science, ranging from exploring the history of star formation in NGC 4449 to mapping galaxies with the brightest, hottest, and most extensive stellar structures.”
Source: www.sci.news
