Astronomers using the NASA/ESA Hubble Space Telescope have captured stunning images of the dwarf spiral galaxy IC 3476 in the constellation of Coma.
This Hubble image shows IC 3476, a dwarf spiral galaxy located 54 million light-years away in the constellation Coma. This image consists of observations made by Hubble's Altitude Survey Camera (ACS) in the near-infrared and optical parts of the spectrum. This is based on data obtained through his two filters. Color is obtained by assigning different hues to each monochromatic image associated with an individual filter. Image credit: NASA / ESA / Hubble / M. Sun.
IC 3476 It is located in the constellation Coma, approximately 54 million light-years from Earth.
This galaxy is first discovered It was proposed by German astronomer Arnold Schwassmann on November 22, 1900.
IC 3476, also known as IRAS 12301+1419 or LEDA 41608, is a member of the Virgo Cluster.
On the other hand, new Hubble images of the galaxy don't look quite as dramatic. The actual physical events occurring in IC 3476 are highly energetic.
“IC 3476 is undergoing a process known as ram pressure stripping, which promotes unusually high levels of star formation within the region of the galaxy itself,” the Hubble astronomers said.
“We tend to associate the letter 'ram' with the acronym RAM, which refers to random access memory in computing.”
“But ram pressure has a perfectly clear definition in physics: it is the pressure exerted on an object by the overall resistance of the fluid as it moves through some form of fluid.”
“If the entire galaxy is under ram pressure, then the galaxy is a 'celestial body', and the intergalactic medium or the intracluster medium (dust and gas that permeates the space between galaxies, in the latter case the intergalactic space) becomes a “celestial body”. fluid'. “
“Lamb pressure stripping occurs when gas is stripped from a galaxy by ram pressure,” the astronomers explained.
“Gas is absolutely key to star formation, so removing this gas could lead to reduced levels of star formation or even a complete cessation.”
“But the ram's pressure could also compress other parts of the galaxy, which could actually promote star formation.”
“This is what appears to be happening in IC 3476: no star formation appears to be occurring at the edges of the galaxy, which are bearing the brunt of the ram pressure separation, but in deeper regions of the galaxy, the rate of star formation slows down. It seems to be clearly above average. ”
Source: www.sci.news
