Saturday , October 1 2022

The most famous galaxy glows at its neighbors – astronomy now


The best-known galaxy, described here in an artist's impression, is the cannibalization of three galaxies nearby, helping it shine with 350 times the sun's trilliance. Photo: NRAO / AUI / NSF) S. Dagnello

Observations of the best-known galaxy show that it vibrates three smaller neighbors, sucks in huge streams of dusty debris that contributes to its record.

The galaxy, discovered in 2015 by the broad infrared field survey, or WISE, is run by a black hole of 4 billion solar. The enormous gravity of the black hole accelerates the falling material to tremendous speeds, warming it to millions of degrees. The result is a strong quasar that is 350 trillion times more radiant than the sun.

Although the largest or largest galaxy in the known universe, WISE J224607.55-052634.9 will easily be the clearest if any other galaxy will be the same distance from Earth. As it is, W2246-0526 is about 12 billion light years away, which means it looked like when the universe was tenth of its current era.

Recent observations by the large Atacama millimeter / submillimetre array (Alma) show various trails of dust being attracted to three galaxies nearby. The researchers say the paths contain almost as much material as the galaxies themselves, and it is unclear whether any of them will survive the encounter or if they may be consumed by their glamor neighbor.

"It is possible that this feeding frenzy has been ongoing for some time, and we expect the Galactic Banquet to continue at least several hundred million years," said Tanio Diaz-Santos of Universidad Diego Portales in Santiago, Chile, lead newspaper author in the newspaper science.

This type of galactic cannibalism is not uncommon, but W2246-0526 is the farthest galaxy, but has been found to attract material from many sources.

"We knew from previous data that there were three companion galaxies, but there was no evidence of interactions between these neighbors and the central source," Diaz-Santos said. "We did not look for cannibalistic behavior and we did not expect it, but this deep dive with the Alma Observatory makes it clear."

The super bright quasar known as W2246-0526 is seen here in data from the ALMA radio telescope array. The dust of three adjacent galaxies, labeled C1, C2 and C3, is trailed by the gravity of a massive black hole, creating huge currents and a long tails tail. Image: Alma (ESO / NAOJ / NRAO); S. Dagnello (NRAO / AUI / NSF); T. Diaz-Santos et al. Lira

W2246-0526 is classified as "hot galaxy, fuzzy dust", or "hot DOG". Most quasars are considered to receive at least some of their fuel from external sources, perhaps intergalactic gas or space feed frenzies consumption in other nearby galaxies. W2246-0526 may be a representative of other dark quasars, or it may be in the department itself.

"This galaxy may be one of its kind, because it is almost as glamorous as any other galaxy we found with WISE and it was formed very early in the history of the universe," said Peter Eisenhart, a research scientist and co-editor of the paper. science.

"But we have discovered many other galaxies with WISE that are similar: distant, dusty and thousands of times more glamorous than typical galaxies today, so with W2246-0526 we may see what happens during a key stage in the development of galaxies and hidden quasars.

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