In the Network & # 39; the News & # 39; Reference reported on the British media on the 24 & # 39; November said that after the waste dust and gas that is the Milk Way, a galaxy ghost that looks different from other galaxies that non- people have seen before. Or at least that is what some astronomers say – but other researchers asked their findings.
According to the British "New Scientist" weekly reported on 16 & # 39; in November, the dwarf galaxies are newly discovered third of Milk size. It lies in the constellation of & # 39; Antria, 450 million light years from Earth. It's called "Antelias 2" – or "Ante-2".
The researcher Gabriel Torealva said: "It's like any galaxies around Dairy vehicle. We know that have been around for many years. But it is 10 times the size of & # 39; those galaxies, and brightness is distributed in the sky. The biggest area makes it very fragmented and therefore harder to check it out. "
According to reports, he and his team captured the Ante-2 with powerful stars called RR Lyle variable, and the bright stars of the RR Lyle variable vibrating, bright and darker for a long time. As you know, almost every small galaxy that orbit the Milk Way has & # 39; at least one signal as it works with & # 39; & # 39 synchronized way; the surrounding stars.
According to the report, Yarwa Torre and his collaborators used the four & # 39; RR Lyle stars observed by the satellite & # 39; Gaia to monitor the position and movement & # 39; nearby stars and makers Milk and over. The team found that the set & # 39; star moved along impulses.
The report said that then imkejlu light of & # 39; 100 red giant stars around the four & # 39; RR stars and found that they were moving at the same speed, which means they were part of the same galaxy. But these stars also indicate that the galaxies containing them are strange.
Based on the distance, the team & # 39; research concluded that "Ante-2" is huge, about 9,500 light years. But for such a large galaxy, is extremely bleak. This is because the range of & # 39; its expansion is even 100 times greater than the so-called hyper-diffusion galaxy. This means that the brightness of the "Ante-2" face is the lower one of the & # 39; known star systems.
Torre Yalva believes this can & # 39; is because dark matter of the Milk Way. Can & # 39; is spread by & # 39; equal way in the "Ante-2" should not be concentrated in the center as in the majority of galaxies. It can & # 39; allows "Ante-2" retains its huge volume in the event & # 39; loss & # 39; mass due to the gravitational influence of the Milk Way.
However, Gisela Clementini of & # 39; the Italian National Institute & # 39; the Astrophysics said before we would know exactly how unusual features & # 39; "Ante-2" are still some questions. She studied the RR stars observed by Gaia satellite and stated that there is an error in the formula used by the Torreyalava team to calculate the distance from the "Ante-2".
When considering this, talbetha collaborate with & # 39; & # 39 collaborators in, Bologna and f & # 39; Naples, all thought there was a problem with the distance measurement. This is a serious problem, because the characteristics of & # 39; this galaxy are so unusual only when the galaxy is & # 39; away from us as the budget of teams & # 39; ESTA.
Clementini said recalling the team to attend to this matter and they agree they need re-analyze. She said: "They found something, but in & # 39; this stage, until we can confirm the calculation, I can not niddaħħal any property system."
Clementini said the star & # 39; RR Lyle is not part of the galaxy, but you & # 39; is before the galaxy. If this is the case, the team & # 39; research found "Ante-2" is pure luck. If the distance of the galaxy is far & # 39; away than we think, then its dimensions will be more extreme. But if closer, it seems more like an ordinary dwarf galaxy.
Yarwa Torre said that the error in the formula distance made the star of RR lair about 260,000 light years & # 39; away from Earth instead of the original 424 000 light years. But two other methods are used to confirm the distance & # 39; other stars in the "Ante-2". He said that galaxy like "Ante-2" has hundreds & # 39; like these variable stars, and this group is closer. He also said that new calculations do not alter the nature of & # 39; "Ante-2".
Alan McConaughey a & # 39; University & # 39; Victoria in Canada said: "To the unusual part of the galaxy look unusual, then its distance must be twice.%, Still kind & # 39; very strange object."
He said that we know that the galaxies 'missing' are hidden behind the gas and the dust Milk Way. There are also a handful of & # 39; galaxies equally large and widespread – such as krater 2 and Andromeda 19. He said: "If you are an extreme objects, or the iceberg edge & # 39; new type & # 39; galaxies, this is what we urgently need to know. "
The report said that if the galaxy is more diverse than previously thought, if the galaxy is surrounded by galaxies dwarf, then people may need to write knowledge of how dark matter spreads across the universe and its mechanism & # 39; & # 39 collection; star. (Compile / Hu Wei)
(Original Title: Scientists say that the galaxy carries huge galaxy ghost in Milk Gap edge. British media: to m & # 39; no mystery)