Hubble Space Telescope Revisits NGC 4388

The NASA/ESA Hubble Space Telescope has captured breathtaking new images of the intriguingly tilted spiral galaxy NGC 4388.



This Hubble image showcases spiral galaxy NGC 4388, located about 59 million light-years away in the constellation Virgo. Image credits: NASA / ESA / Hubble / S. Veilleux / J. Wang / J. Greene.

NGC 4388 is situated roughly 59 million light-years away in the constellation Virgo.

This galaxy was first identified by British astronomer Sir Wilhelm Herschel on April 17, 1784.

Also referred to as LEDA 40581 and IRAS 12232+1256, it has a diameter of 120,000 light-years.

NGC 4388 is among the brightest galaxies in the Virgo Cluster, which comprises over 2,000 galaxies.

Classified as an active galaxy, NGC 4388 features a bright and energetic core.

“NGC 4388 is tilted at a steep angle relative to our viewpoint, appearing almost face-on,” Hubble astronomers mentioned in a statement.

“This angle allows us to observe intriguing features that were not visible in earlier Hubble images of the galaxy released in 2016. A gas plume is seen emanating from the galaxy’s core, extending outward from the galaxy’s disk towards the bottom right corner of the image.”

“But where did this outflow originate? What causes it to shine?”

“The answer seems to lie in the vast spaces that separate the galaxies within the Virgo Cluster.”

“Though it may seem like the void between galaxies is empty, this area is actually filled with clusters of hot gas known as the intracluster medium.”

“As NGC 4388 traverses the intracluster medium, it punches through this gas.”

“The pressure from the hot intracluster gas forces material out of NGC 4388’s disk, trailing it as the galaxy moves.”

“The origin of the energy that ionizes this gas cloud and produces its glow remains uncertain,” the researchers observed.

“We suspect that some energy may originate from the galaxy’s center, where a supermassive black hole accelerates the surrounding gas to create a superheated disk.”

“The intense radiation emitted from this disk could ionize the gas nearest to the galaxy, while shock waves could cause filaments of gas farther out to become ionized.”

Source: www.sci.news

Hubble revisits NGC 4414: The Majestic Spiral Galaxy

Astronomers using the NASA/ESA Hubble Space Telescope have captured stunning new images of unobstructed spiral galaxy NGC 4414.



This Hubble image shows the unobstructed spiral galaxy NGC 4414 located 51 million light-years away in the constellation of Coma. Image credits: NASA / ESA / Hubble / O. Graur / SW Jha / A. Filippenko.

NGC4414 It is located approximately 51 million light years from Earth in the constellation Coma.

The galaxy, also known as the Dusty Spiral Galaxy, Ark 365, IRAS 12239+3129, LEDA 40692, or UGC 7539, has a diameter of approximately 56,000 light years.

NGC 4414 was first discovered on March 13, 1785 by German-born British astronomer William Herschel.

galaxy belong to It belongs to the Coma I group, a group of galaxies close to the Virgo cluster.

NGC 4414 was previously observed It was studied by Hubble in 1995 and 1999 as part of its research efforts. Cepheid variable star.



This collage features the supernova observed by Hubble in NGC 4414. In the upper left, a large spiral galaxy can be seen tilted diagonally. Each subsequent panel shows a close-up of the galaxy in 1999, 2021, and 2023 to highlight the galaxy's supernovae. Image credits: NASA / ESA / Hubble / O. Graur / SW Jha / A. Filippenko.

“Cepheid stars are a special type of variable star with very stable and predictable brightness changes,” Hubble astronomers said in a statement.

“The period of these fluctuations is determined by the star's physical properties, such as its mass and true brightness.”

“This means that astronomers can learn about the physical properties of Cepheids just by looking at their light fluctuations, and can use that very effectively to determine their distances.”

“For this reason, cosmologists refer to Cepheids as 'standard candles.'”

“Astronomers used Hubble to observe Cepheids like those in NGC 4414, and the results were surprising.”

“Cepheids were then used as a stepping stone to measure distances to supernovae, which in turn gave us a measure of the size of the universe.”

“Today we can tell the age of the universe with much greater precision than before Hubble: about 13.7 billion years.”

Source: www.sci.news