Collision of galaxies ‘formed Andromeda’
London: Astronomers has revealed that Andromeda - the nearest spiral galaxy to the Milky Way- was born when two smaller galaxies collided.
An international team, who conducted a computer simulation of how Andromeda evolved over time, suggest that two galaxies collided some nine billion years ago and permanently fused about 5.5 billion years ago, reports the BBC.
The lead author, Francois Hammer of the Paris Observatory, France, said that while scientists have been able to detect galaxies near the edge of the Universe, there many gaps in our knowledge of our immediate neighbourhood, known as the Local Group of galaxies.
The Local Group includes some 40 galaxies, of which the biggest are the Milky Way and Andromeda.
"Many astronomers, especially specialists in this field, thought that the Andromeda galaxy could be the result of a major merger. However, this has never been tested and especially dated [until now]," said Dr Hammer.
The researcher explained that his team``s findings had "the potential to revise all our knowledge about the Local Group - and this may have also an impact regarding the amount of dark matter in galaxies".
Using a computer simulation, the astronomers were able to reproduce most of the peculiar properties of the Andromeda galaxy: the large thin disk including its giant ring of gas and dust, the massive central bulge, the gigantic thick galactic "disc", and the giant stream of old stars.
The simulations were run on high performance computers at the National Astronomical Observatory of China (NAOC) and at the Paris Observatory.
The scientists used up to eight million particles to simulate stars, gas, and dark matter.
Dr Hammer said that the study could also provide insights into the formation of our own galaxy.
"It doesn``t mean that the Milky Way could not have been formed this way - [maybe it has been], but [it would have happened] much earlier," he said.
The study has been published in the Astrophysical Journal.
More from India
More from World
More from Sports
More from Entertaiment
- One year of Modi govt: PM promises to fulfil aspirations
- Watch: Mumbai cops find new secret agents in housewives!
- Hundreds die as heat wave continues in India
- 2G scam: Ex-TRAI chief alleges Manmohan Singh had warned him to cooperate
- Pranab Mukherjee defends Bofors scam, says it was just a media trial
- Salman Khan attends sister Arpita's wedding reception in Mandi
- Zee Media's mega survey on Modi govt
- Zee Media Exclusive: Vidya Balan chats about 'Hamari Adhuri Kahani'
- Para athlete Deepa Malik complains of callous service by Air India
- I eat beef, can somebody stop me?: Kiren Rijiju hits back at Naqvi
- Delhi: Visually impaired boy scores 91.4% in CBSE 12th Board exams
- Smriti Irani visits Amethi, promises to pay insurance money to 25,000 women
- One year of Modi govt: Amit Shah addresses media
- MP: 14-year-old boy works as bonded labour since 2009
- UP: Man chops off wife's nose, hair for dowry
- Arpita-Aayush wedding reception: Salman Khan spreads love in Mandi, says `hum aapke hain`
- One year of NDA govt: PM Modi writes open letter to nation, promises to transform India
- CBSE Class 10 Board Result 2015 (cbse.nic.in, cbseresults.nic.in) postponed?
- World optimistic about India: PM Narendra Modi on 1 year of NDA govt
- MSBSHSE Class 12th HSC results 2015 to be declared at 1pm tomorrow
- CBSE Class 10 Board Result 2015 to be announced today
- Check mahresult.nic.in for MSBSHSE Maharashtra Class 12 HSC Result 2015
- Rahul Gandhi takes a dig at one year of Modi govt, wishes 'happy birthday' to 'suit-boot ki sarkar'
- Bharatiya Janata Party lacks majority for Ram Temple, Article 370: Amit Shah
- Maharashtra MSBSHSE HSC Result 2015 on mahresult.nic.in
- AAP govt moves resolution against MHA notification: As it happened
- I was misquoted, says Kiren Rijiju on 'beef' remark
- Heatwave kills 90 more in Andhra, Telangana; toll crosses 800
- Gujjars adamant on holding talks in Bayana; rail tracks remain blocked
- CBSE 10th result to be declared tomorrow