The milky Way became thicker after a collision with a galaxy

02 November, 2018, 23:39 | Author: Darnell Taylor
  • The milky Way became thicker after a collision with a galaxy

Simulations suggest that in another two billion or so years, the Milky Way will swallow the Large Magellanic Cloud, forever erasing it from the southern sky. The evidence is littered across the sky all around us, but it has taken Gaia and its extraordinary precision to show us what has been hiding in plain sight all along. The data astronomers used a telescope Gaia.Also, scientists have created a computer model of a possible collision. The observed stars in particular are now passing by our solar neighborhood. And then you have these stars that have chose to move in the opposite sense. Usually galaxies the ratio [α/Fe] in stars decreases with time (while their metallicity [Fe/H] increases).

The team knew the stars had formed elsewhere, but they didn't know how they ended up floating around the Milky Way. "It took both surveys working together, and both of these projects will continue, so we could find more stars from the merged galaxy and probably start to reconstruct its whole history". In the Milky Way's case, the galactic disc can clearly be classified as two distinct parts: the thin disc, which is about 400 light-years thick, containing gas, dust and stars; and the thick disc, which extends to 1,000 light-years, containing only stars older than 10 billion years, like the inner halo stars.

Looking for traces of galactic mergers with the Milky Way's halo, the researchers found to their surprise that most of its stars were from the same immediate family. And there is the thick disc, which is a few thousand light years deep.

According to the calculations of astronomers, the galaxy, called Gaia-the moon Enceladus, had a mass of 6×108 solar.

Stars that form in different galaxies have unique chemical compositions that match the conditions of the home galaxy.

The evidence for Enceladus the galaxy is strong.

The globular cluster Omega Centauri - with as many as ten million stars - is seen in this image captured from the European Southern Observatory's La Silla Observatory. The Universe was smaller in the past and so collisions were more frequent.

Massive galaxies such as our Milky Way galaxy are the outcome of mergers with other smaller galaxies.

Girl obsessed with Michelle Obama's portrait dresses as her for Halloween
That's why Parker honored her idol on Halloween by wearing a replica of the dress in her portrait - only a tad smaller, of course. And before Obama had publicly commented on the costume, Parker's mother predicted the former first lady's reaction.

Rotating postal strikes come to Ottawa
It's estimated that these plants process a combined one million parcels and packets a day for communities across the country. Postal workers also walked off the job at four locals on Vancouver Island early Wednesday morning.

Brazil To Move Israel Embassy To Jerusalem
Polls suggested Lula would have beaten Bolsonaro in the election had the ex-president not been jailed 12 years for corruption. The former army captain, who took a comfortable victory in Sunday's presidential election, will be sworn in on January 1.

"Seeing that we are now starting to unravel the formation history of the Milky Way is very exciting", says Anthony Brown, Leiden University, The Netherlands, who is a co-author of the paper and also chair of the Gaia Data Processing and Analysis Consortium Executive.

Research earlier this year shows that the Milky Way is still a little hungry. That vision is paying off. Adding in this extra piece of the puzzle makes it clear that they were originally a separate galaxy.The authors have named the crashing satellite galaxy "Gaia-Enceladus", which is very fitting. "It's fantastic. It's just so lovely and makes you feel so big and so small at the same time".

According to scientists, the giant halo of the milky way could appear as a result of clashes with smaller galaxies 10 billion years ago.

"We were hoping to find fused satellite stars in the halo. It has eaten many dwarf galaxies in the past, and we've just found a major one that it ate in the past", she says.

However another thing also set these stars apart; aside from moving differently, they are also chemically different. By plotting both trajectory and chemical signature, the "invaders" stood out clearly.

After a collision with another galaxy, the disk of the milky way is thicker. Collision with object of this size had to warm up the young galactic disk, forming a thicker modern disk.

In a previous paper, Helmi had already described a huge "blob" of stars sharing a common origin [1].

The Milky Way collided and merged with the sizeable Gaia-Enceladus galaxy about 10 billion years ago. In Greek myths, Enceladus is the giant son of Gaia and was buried below Sicily, causing seismic activity - and the galactic burial would have caused quite a lot of upheaval as well.



Chelsea's Maurizio Sarri on unbeaten record: 'I was lucky'
It depends on him and the club. "For me Cahill is very important on the pitch and out of the pitch". I spoke with his teammates and they all told me he really was a very good captain.

Woman chokes bouncer after assuming he touched her
But LaGrave immediately turns around and has her sights set on the bouncer who was simply in the wrong place at the wrong time. Nightclub customers were seen running to help the attacked doorman as he woke up dazed on the dancefloor.

Ghost-like umbrella octopus dances around deep sea camera
The vast majority of the Dumbo octopus species measure between 7.8 and 12 inches long, according to the aquarium. The biggest Dumbo octopus ever measured was more than 1.8m.

Alec Baldwin arrested in Manhattan
He also has " Match Game " and talk show "Sundays With Alec Baldwin " on ABC, which did not immediately have a comment. Baldwin was also photographed in an apparent public altercation with paparazzi in NY in 2013.

Astronomers confirm black hole inside Milky Way
Flash in the infrared spectrum indicated scientists to the fact that the gas rotates around the event horizon of a black hole. Never-before-seen images offer fresh evidence that a supermassive black hole lurks at the centre of the Milky Way .

Australian man jailed for persuading wife to kill herself
A man who persuaded his wife to kill herself so he could claim her life insurance has been jailed for 10 years in Australia . Graham Morant appeared in Brisbane's Supreme Court on Friday where he was sentenced to a total of ten years behind bars.

Indian Couple Fall To Their Death While Taking Selfie
The irony of that statement, and of what happened to Moorthy and her husband, is not lost on me, and it shouldn't be lost on you. In a post from April, Moorthy apologized to readers for going silent and "disappearing for more than a year".

'Father of Taliban' Mullah Samiul Haq killed in Pakistan
The prime minister has sought a report and directed that an investigation be carried out immediately to find the perpetrators. The religious scholar was the founder of the Haqqania seminary, where dozens of Afghan leaders have received their education.

Trump seeks deal with Xi this month
Trump said he and Xi plan to meet during a gathering of the Group of 20 major economies this month in Argentina. Xi was quoted as saying after the call with Trump that they had hoped to expand trade cooperation.

WWE picked a hell of a time to bring back Hulk Hogan
The WWE star appeared on Raw on Wednesday night, looking much skinnier than usual. Because of time zone differences, the show will start at 12 p.m.