Bookmark Kaumudi Online  Bookmark this site  Editor@Kaumudi  |  Marketing  Print Advt rates  |  Calendar 2018        Go!    
 
 
June 23, Saturday 2018 3:55 AM       

       HEADLINES: 12-yr-old boy dies after Rambutan chokes his throat                                              Carnatic musician Alleppey Sreekumar is no more                                              Shobhana George Khadi Board vice-president                                              Death of foreign woman at Kovalam: Husband seeks CBI inquiry                                              Ganesh can be in soup if house woman sticks to statement                                              Congress' Saifuddin Soz backs Musharraf's remark on Kashmiris                                              GST brought positive changes in Indian economy: PM Modi                                              2 terrorists killed in Anantnag encounter                                              Lanka thanks PM Modi for grants to run free ambulance service                                              Pak steps up security prior to assembly elections                                              Activists: Syrian government steps up offensive in southwest                                              Trump tells GOP to 'stop wasting their time' on immigration                                              Kidambi Srikanth named Sports Illustrated Sportsperson of the Year                                              Ronaldo aging like 'port wine' at fourth World Cup                                              Pressure on Messi against Croatia after Ronaldo scores again                                              FIFA WC: Mbappe's goal takes France into knockout stages                                              Wary of hacks, World Cup teams get serious on cybersecurity                                              Kaumudi Facebook
       SCI&TECH Next Article: Ensuring sexual, reproductive health for overall well-being  
       Astronomers reveal secrets of most distant supernova ever detected
 
         Posted on :18:21:33 Feb 23, 2018
   
A A
       Last edited on:18:21:33 Feb 23, 2018
         Tags: Astronomers, DES16C2nm, supernova
 

WASHINGTON DC: An international team of astronomers led by the UK-based University of Southampton has confirmed the discovery of the most distant supernova ever detected - a huge cosmic explosion that took place 10.5 billion years ago, or three-quarters the age of the Universe itself.

The exploding star, named DES16C2nm, was detected by the Dark Energy Survey (DES), an international collaboration to map several hundred million galaxies in order to find out more about dark energy - the mysterious force believed to be causing the accelerated expansion of the Universe.

As detailed in a new study, light from the event has taken 10.5 billion years to reach Earth, making it the oldest supernova ever discovered and studied. The Universe itself is thought to be 13.8 billion years old.

A supernova is the explosion of a massive star at the end of its life cycle. DES16C2nm is classified as a superluminous supernova (SLSN), the brightest and rarest class of supernovae, first discovered ten years ago, thought to be caused by material falling onto the densest object in the Universe - a rapidly rotating neutron star newly formed in the explosion of a massive star.

Lead author of the study Dr. Mathew Smith, of the University of Southampton, said: "It's thrilling to be part of the survey that has discovered the oldest known supernova. DES16C2nm is extremely distant, extremely bright, and extremely rare - not the sort of thing you stumble across every day as an astronomer.

"As well as being a very exciting discovery in its own right, the extreme distance of DES16C2nm gives us a unique insight into the nature of SLSN.

"The ultraviolet light from SLSN informs us of the amount of metal produced in the explosion and the temperature of the explosion itself, both of which are key to understanding what causes and drives these cosmic explosions."

Study co-author Professor Mark Sullivan said: "Finding more distant events, to determine the variety and sheer number of these events, is the next step.

"Now we know how to find these objects at even greater distances, we are actively looking for more of them as part of the Dark Energy Survey."

DES16C2nm was first detected in August 2016, and its distance and extreme brightness confirmed in October that year using three of the world's most powerful telescopes - the Very Large Telescope and the Magellan, in Chile, and the Keck Observatory, in Hawaii.

Study co-author Bob Nichol commented: "Such supernovae were not thought of when we started DES over a decade ago. Such discoveries show the importance of empirical science; sometimes you just have to go out and look up to find something amazing."

More than 400 scientists from over 25 institutions worldwide are involved in the DES, a five-year project which began in 2013.

The collaboration built and is using an extremely sensitive 570-megapixel digital camera, DECam, mounted on the Blanco 4-meter telescope at Cerro Tololo Inter-American Observatory, high in the Chilean Andes, to carry out the project.

Over five years (2013-2018), the DES collaboration is using 525 nights of observation to carry out a deep, wide-area survey to record information from 300 million galaxies that are billions of light-years from Earth.

The survey is imaging 5,000 square degrees of the southern sky in five optical filters to obtain detailed information about each galaxy. A fraction of the survey time is used to observe smaller patches of sky roughly once a week to discover and study thousands of supernovae and other astrophysical transients.

The study is published in the Astrophysical Journal.

A A
       SCI&TECH
Next Article: Ensuring sexual, reproductive health for overall well-being
 
 
SCI&TECH HEADLINES
Yoga helps against non-communicable diseases: WHO  
Spironolactone can help prevent acne: Study  
Older Amazonian forests help regulate global climate  
Goal conflict linked to depressive symptoms  
A new world: Top 10 new species for 2018  
Beat the risk of frailty with healthy heart  
Twitter to hide trolls that hurl abuse: Twitter CEO  
Fortnite is finally coming to Android  
This test could detect signs of pancreatic cancer  
Aliens exist but may be in parallel Universe: Study  
This is your heart on nitric oxide  
Is your kid's heart clock ticking right?  
Do at-risk adolescents show depressive symptoms on social media?  
NASA launches Insight spacecraft to Mars for deepest dig yet  
Daily intake of this drug can cause certain cancers in men  
A new weapon against epilepsy  
Hail stone weighing three kg sign of climate change: Expert  
PMSing? Could be because of alcohol!  
Social media firms given a week to better protect kids  
The stronger you are, the healthier your brain is  
NASA may soon identify 2,400 alien planets  
What triggers depression among adults?  
Turn your hobbies into part-time job opportunities with these apps  
Apple launches special RED Edition for iPhone 8, 8 Plus  
Humanity‚Äôs first flight to Sun to launch in July: NASA  
 
Should Yoga be made compulsory in all schools?
Yes
 
No
 
No opinion
 
 
 
Home Kerala India World Business Sports Sci&Tech Education Automobile CityNews Movies Environment Letters 
© Copyright keralakaumudi Online 2011  |  Reproduction in whole or in part without written permission is prohibited.
Head Office Address: Kaumudi Buildings, Pettah P.O, Trivandrum - 695024, India.
Online queries talk to Deepu Sasidharan, + 91 98472 38959 or Email deepu[at]kaumudi.com
Customer Service -Advertisement Disclaimer Statement   |  Copyright Policy