Thursday, 13 December, 2018

Distant galaxy hints at universe's earliest stars

Distant galaxy hints at universe's earliest stars Researchers Close In On Birthdate of First Stars
Doris Mccormick | 17 May, 2018, 22:42

When Japanese astronomers at the Osaka Sangyo University detected a whiff of oxygen in a galaxy far away, they realized that the stars in there formed 250 million years after the Big Bang, which is a very short time in cosmic time.

As this infrared light traveled across space, the expansion of the Universe stretched it to wavelengths more than 10 times longer by the time it reached Earth and was detected by ALMA.

The team determined that, if the oxygen signature was from 500 million years after the Big Bang, then the first stars in that galaxy would have been born about 250 million years post-Big Bang. The VLT helped in studying the "spectral lines from hydrogen" and the Alma helped in studying the "spectral lines from oxygen".

What made this discovery so incredible is that the signal is believed to have been emitted 13.3bn years ago making it not only the most distant oxygen ever detected, but shows stars were forming as little as 250m years after the Big Bang. However, numerous heavier elements we take for granted today (such as carbon and oxygen) did not exist before the first stars.

In a new study set for publication tomorrow in the journal Nature, an global team of astronomers used this impressive array to observe an extremely distant galaxy called MACS1149-JD1.

"This is an exciting discovery as this galaxy is seen at a time when the Universe was only 500 million years old and yet it already has a population of mature stars", added Dr. Nicolas Laporte, a postdoctoral researcher at University College London.

John Dorsey changes his tune and welcomes Browns being on Hard Knocks
Hard Knocks will debut in August and will include 5 episodes from Training Camp. The Browns were one of six finalists for the documentary this year.


Lachlan Murdoch set to become chairman and CEO of 'New Fox'
Speaking on the changes, Lachlan Murdoch said: "We have worked through the winter "standing up" a reimagined independent Fox ". He also now serves as co-chairman of News Corp and executive chairman of NOVA Entertainment, an Australian media company.


Backstreet Boys Release New Single and Video, Sign to RCA Records
They're back! Band the Backstreet Boys for the first time after a five year hiatus pleased its fans with a new single and video. But fans of the 1990s boyband need not worry - the group has retained its signature cheesy dance moves and slick choreography.


"The mature stellar population in MACS1149-JD1 implies that stars were forming back to even earlier times, beyond what we can now see with our telescopes", said Laporte.

After figuring out the age of the signal, the astronomers worked backwards to determine when the galaxy's first stars fired up.

The distance of the faraway galaxy was calculated using ground-based telescopes in Chile and infrared data from orbiting telescopes, to reconstruct the early history of MACS1149-JD1.

The maturity of the stars seen in MACS1149-JD1 raises the question of when the very first galaxies emerged from the total darkness, an epoch of astronomers romantically term "cosmic dawn". The MACS1149-JD1 observation shows galaxies must have existed before any that are now detectable.

For MACS1149-JD1 to contain substantial amounts of oxygen, many stars must have already gone through that whole life cycle.

Co-author Professor Richard Ellis, also from UCL, said: "Determining when cosmic dawn occurred is akin to the Holy Grail of cosmology and galaxy formation. Since we are all made of a processed stellar material, this is really finding our own origins".

Recommended

At least 2 dead, many hurt in NJ school bus crash At least 2 dead, many hurt in NJ school bus crash A sign outside of the East Brook Middle School in Paramus informed people to go to the auditorium for updates on the accident. It is unclear how many students were aboard the bus and state police didn't know how serious the injuries were.

Nintendo Switch's Go Vacation Brings the Vacation to You Nintendo Switch's Go Vacation Brings the Vacation to You EDT before the convention center opens, so fans will have a clearer idea of what will be playable in Nintendo's booth. For more details about ticketing, visit https://e3.nintendo.com/attendee-faq for continuing updates.

New Apple Campus Could Be In North Carolina Or Northern Virginia New Apple Campus Could Be In North Carolina Or Northern Virginia In the meantime, the company will begin construction on the new RTP campus, which will sit on up to 300 acres of land. Some reports have mentioned that Apple has explored starting a campus for 20,000 employees in Northern Virginia.

Browns Selected as Featured Team for 2018 Season of 'Hard Knocks' Browns Selected as Featured Team for 2018 Season of 'Hard Knocks' The show will also feature the first training camp with No. 1 overall pick in the 2018 NFL Draft, Baker Mayfield . Williams appeared on the program in 2017 during his time with the Los Angeles Rams .

Britain taken to court by European Commission over air pollution Britain taken to court by European Commission over air pollution But ministers refused to make them compulsory, instead making them a voluntary and last-resort option for local authorities. The EU introduced limits for particulate matter (PM10) and nitrogen dioxide (NO2) in 2010.

Red's $1300 Holographic Phone Coming to AT&T, Verizon This Summer Red's $1300 Holographic Phone Coming to AT&T, Verizon This Summer AT&T will offer consumers the first public look at the phone at the AT&T Shape event on June 2-3 at Warner Bros. High-end camera maker Red revealed last summer that it was working on its first smartphone.

Empire star Taraji P. Henson announces engagement to Kelvin Hayden Empire star Taraji P. Henson announces engagement to Kelvin Hayden Not exclusively was Sunday Mom's Day, however it was additionally Henson's 24-year-old son Marcel Johnson's birthday. Next up, she'll be providing her voice to the upcoming Disney sequel Ralph Breaks the Internet: Wreck-It Ralph 2.

Dog saves friend from drowning in family's pool after falling in Dog saves friend from drowning in family's pool after falling in It's a rescue seen all over the internet, and one you have to see to believe. "She says he's a certified lifeguard now". ACS-low, Arizona, told the media that her husband Jay found his wet dog named Smokey and I chose to check what happened.

Mikel Arteta given Arsene Wenger backing for Arsenal job Mikel Arteta given Arsene Wenger backing for Arsenal job The 36-year-old is now an assistant coach at Manchester City and has been heavily praised for his work there. Arteta's odds have shortened over the last week as Max Allegri and Luis Enrique have both become less likely.

This Is What Meghan Markle's Official Royal Title Will Be This Is What Meghan Markle's Official Royal Title Will Be Samantha Grant argued she's an American and if she wants to talk about herself and her father, Thomas Markle , she's allowed. Remi Litt: Meghan's 6-year-old goddaughter, and the child of Meghan's close friends Benita and Darren Litt .

Multiple Injuries Reported In School Bus Crash In Mount Olive, New Jersey Multiple Injuries Reported In School Bus Crash In Mount Olive, New Jersey The school bus was carrying students from Paramus Middle School who were on a field trip when the crash happened around 10:30 a.m. A truck collided with a school bus on a New Jersey highway Thursday morning, leaving multiple people injured, reports said.

Guatemala opens embassy in Jerusalem, two days after US move Guatemala opens embassy in Jerusalem, two days after US move Prior to 1980, Guatemala and a dozen other countries maintained embassies in Jerusalem . Most of the European Union ambassadors in Israel are reported to have boycotted.

Indore again emerges as cleanest city, Bhopal maintains 2nd spot Indore again emerges as cleanest city, Bhopal maintains 2nd spot Delhi Cantonment has been adjudged the best Cantonment Board in the country, followed by Almora and Ranikhet Board in Uttrakhand. The agency also collected citizen's feedback directly and performance of the Swachchata App was also monitored.

Trump claims 'Obama FBI' spied on him using an embedded informant Trump claims 'Obama FBI' spied on him using an embedded informant McCarthy said the government purposely kept the Trump campaign investigation under wraps, because they knew they were on thin ice legally and wanted to avoid any public backlash.

YouTube just added songwriter, label and publisher credits to millions of songs YouTube just added songwriter, label and publisher credits to millions of songs John called songwriters the "heart and the soul of songs, so it's wonderful seeing them get the credit they deserve". In today's digital world, achieving accurate and comprehensive song credits is more attainable than ever.