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rogue galaxy

06.02.2019

An unusual dwarf galaxy has been discovered. The uniqueness lies in the fact that it is too isolated from others, writes Digital Trends. It is located 30 million light-years from the Milky Way and two million light-years from the nearest large galaxy, NGC 6744, making it possibly the most isolated small galaxy ever discovered.

The dwarf galaxy Bedin 1 was accidentally discovered by a team of astronomers from the European Space Agency through the Hubble telescope. It was named after Luigi Bedin, an astronomer at the Italian National Institute of Astrophysics, who leads the team that made the discovery.

There are only a few billion stars in an open galaxy. For example, there are about 250 billion of them in the Milky Way.

They found it while studying a cluster of stars in another galaxy NGC 6752. Initially, they wanted to explore the cluster itself, but then switched to another object - a dwarf galaxy was discovered behind the star cluster. She looks underdeveloped, which is why she was hiding in plain sight all the time.

Astronomers now believe that other such galaxies may be hiding behind the light of star clusters. To detect them, you will need another WFIRST telescope. But NASA is just about to launch it into orbit.

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Random news from the Archive

Visual stimuli amplify sound 20.02.2018

A new study has shown that visual stimuli (such as tracking a person's lips while talking) help the brain perceive sounds, amplifying them.

Researchers at University College London (UCL) have found that visual information is related to auditory information on a more fundamental level than previously thought, independent of any conscious or attentional processes. When both of these types of information are perceived simultaneously, according to a press release on the NeuroscienceNews website, the auditory cortex - the region of the brain responsible for interpreting what is heard - can amplify sounds that somehow correlate with what the person is looking at.

As lead author Dr Jennifer Bizley notes, although the auditory cortex is focused on processing sounds, almost a quarter of its neurons respond to light - this discovery was made ten years ago and until now scientists have tried to understand the reason for this structure of this brain. areas.

In a 2015 study, Beasley and colleagues found that it's easier for people to distinguish between two sounds if they try to focus on what happens to the visual stimulus over time. In the new work, the experts presented the subjects with the same auditory and visual stimuli, while monitoring neural activity. It turned out that when one of the sound streams changed amplitude in parallel with changes in the visual stimulus, more neurons in the auditory cortex responded to this sound.

“Looking at another person does not just make us hear better because we can recognize lip movements,” Beasley notes. “Our research has shown that this has an advantage at a lower, basic level, as the timing of movements and sounds tells auditory cortex, to which of the sounds to respond with greater force.

According to the researchers, the results of the work can be useful in the development of special techniques for people with hearing impairment. In addition, it is expected that the study may also help developers of hearing or cochlear aids.

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