IIT Guwahati.(Handout)
IIT Guwahati.(Handout)

IIT Guwahati Researchers find new clues to how and why stars die

IIT Guwahati researchers find new clues to how and why stars die
PTI, New Delhi
PUBLISHED ON JAN 12, 2021 02:00 PM IST

Researchers at the Indian Institute of Technology (IIT), Guwahati, claim to have found important clues to understand the death of massive stars and have also revealed the problems with the existing models.

The research in collaboration with Max Planck Institute for Physics, Munich, Germany, and Northwestern University, USA, has also been published in international journal Physical Review Letters (PRL).

"Supernovae -- the super explosions at the time of death of large massive stars -- are considered to be the cradle of birth for new stars and synthesis of the heavy elements in nature. At the end of their life, the stars, especially massive ones, collapse resulting in an immense shock wave that causes the star to explode, briefly outshining any other star in its host galaxy.

"The study of supernovae and the particles they release helps us understand the universe because almost all matter that makes up the universe is a result of these massive explosions. However, the mechanism of these super explosions is not yet completely solved and has remained one of the enigmas of nature," said Sovan Chakraborty, Assistant Professor, Department of Physics, IIT Guwahati.

According to the team, the solutions to the toughest challenges to the core collapse mechanism of the huge supernovae come from the tiniest subatomic particles called neutrinos.

"During the core collapse supernova explosion, neutrinos are created in several particle processes. Due to their neutral nature and extremely weak interaction with stellar matter the neutrinos escape the dying star and carry 99% energy of the collapsing star. Thus the tiny neutrinos are the only messenger bringing information from the deepest interiors of the star. Neutrinos on the other hand have their own complexities," he said.

"This information is very crucial for the reason that in the extremely dense supernovae core neutrinos interact with other neutrinos and may interchange flavors. This conversion may happen rapidly (in nanosecond time scale) and flavor interchange can affect the supernovae process as the different flavors are emitted with different angular distribution.

"These ’fast' conversions are nonlinear in nature and are not confronted in any other neutrino sources but supernovae. We for the first time did a non-linear simulation of fast conversion with ‘all’ the three neutrino flavors in supernovae," Chakraborty added.

SHARE THIS ARTICLE ON
app
Close
RRB NTPC 3rd Phase CBT exam schedule.(Shutterstock)
RRB NTPC 3rd Phase CBT exam schedule.(Shutterstock)

RRB NTPC 3rd phase exam schedule released, check dates and instructions

Edited by Nilesh Mathur
PUBLISHED ON JAN 20, 2021 09:23 PM IST
  • According to notification released, the 3rd phase of 1st Stage Computer Based Test (CBT-1) will be held from January 31 to February 12 for around 28 lakh candidates.
Close
The Punjab School Education Department on Wednesday announced to restart primary classes at all schools from January 27.(Ht File)
The Punjab School Education Department on Wednesday announced to restart primary classes at all schools from January 27.(Ht File)

Punjab to restart primary classes at all schools from January 27

PTI
PUBLISHED ON JAN 20, 2021 08:42 PM IST
The Punjab School Education Department on Wednesday announced to restart primary classes at all schools from January 27.
Close
IBPS on Wednesday released the scores of preliminary exam to recruit probationary officers (PO)/management trainees (CRP PO/MT-X).(ibps.in)
IBPS on Wednesday released the scores of preliminary exam to recruit probationary officers (PO)/management trainees (CRP PO/MT-X).(ibps.in)

IBPS PO scores 2020-21 released, download probationary officer prelims marks now

Edited by Nilesh Mathur
UPDATED ON JAN 20, 2021 09:29 PM IST
  • IBPS PO Prelims scores 2020-21: Candidates who had appeared in the online preliminary exam to recruit PO) management trainees can check their results on the official website of IBPS.
Close
IBPS PO Result out
IBPS PO Result out

IBPS PO Prelims Result 2020: Scorecard, cutoff released at ibps.in

Edited by Nandini
PUBLISHED ON JAN 20, 2021 06:36 PM IST
  • Institute of Banking Personnel on Wednesday declared the results and cutoff marks for PO/MT-X on its official website -ibps.in
Close
The Haryana school education department asked students to submit a medical certificate before joining class.(Manoj Dhaka/HT file)
The Haryana school education department asked students to submit a medical certificate before joining class.(Manoj Dhaka/HT file)

Schools in Haryana to reopen for classes 6 to 8 from February first week

PTI
PUBLISHED ON JAN 20, 2021 05:42 PM IST
Schools in Haryana will reopen for Classes 6 to 8 from the first week of February, state Education Minister Kanwar Pal said on Wednesday.
Close
CBSE on November 7 concluded the second phase of the Jawahar Navodaya Vidyalaya Selection Test.(HT file)
CBSE on November 7 concluded the second phase of the Jawahar Navodaya Vidyalaya Selection Test.(HT file)

Board Exams 2021: No change in passing marks, says PIB fact check team

Edited by Nandini
UPDATED ON JAN 20, 2021 05:17 PM IST
  • Board Exams 2021: The fact checking team of Press Information Bureau (PIB) has refuted the claims of a post circulating in social media regarding reduction of passing percentage in board exams 2021
Close
SSC CHSL 2020 vacancies announced
SSC CHSL 2020 vacancies announced

Application begins for distict judge vacancies in Allahabad Court

Edited by Nandini
UPDATED ON JAN 20, 2021 04:37 PM IST
  • Allahabad High Court UP HJS Recruitment 2021: High Court of Judicature at Allahabad has invited online applications for recruitment against 98 vacancies of district judge (UP HJS).
Close
Representative(Raj K Raj / HT Photo)
Representative(Raj K Raj / HT Photo)

Govt school transformation helped Delhi get highest NAS score

PTI
PUBLISHED ON JAN 20, 2021 03:45 PM IST
Government think tank Niti Aayog on Wednesday lauded the landmark transformation of the government school system in Delhi, as government-aided schools helped the national capital achieve the highest National Achievement Survey (NAS) score.
Close
SSB constable revised answer key out(Shutterstock)
SSB constable revised answer key out(Shutterstock)

SSB Head Constable revised answer key released

Edited by Nandini
PUBLISHED ON JAN 20, 2021 01:59 PM IST
  • SSB Head Constable Revised Answer Key: Sahastra Seema Bal (SSB) on Wednesday released the revised answer key for the posts of Head Constable (Ministerial) on its official website ssb.nic.in.
Close
West Bengal Police recruitment board has declared the final writen examination result of exam for recruitment to the post of constable in West Bengal police 2019.(Getty Images/iStockphoto)
West Bengal Police recruitment board has declared the final writen examination result of exam for recruitment to the post of constable in West Bengal police 2019.(Getty Images/iStockphoto)

SSC GD Constable 2018 final result to be declared today at ssc.nic.in

By Nandini
PUBLISHED ON JAN 20, 2021 01:29 PM IST
  • The Staff Selection Commission (SSC) is likely to declare the SSC GD Constable final result 2018 on Wednesday, January 20, 2021.
Close
Representative(Gurpreet Singh/HT)
Representative(Gurpreet Singh/HT)

Over 9k smart classes, labs in upcoming model schools in Jharkhand

PUBLISHED ON JAN 20, 2021 12:51 PM IST
  • The objective of the initiative is to improve the learning level of students and develop the selected schools into best-in-class schools as per national and international standards, so that students of Jharkhand, particularly rural areas, can compete with students of other education boards.
Close
Symbiosis International University(HT File)
Symbiosis International University(HT File)

SNAP 2020 Result to be declared on this date, check here

By Nandini
UPDATED ON JAN 20, 2021 12:09 PM IST
  • The Symbiosis National Aptitude Test (SNAP) 2020 Result will be declared on January 22, 2021, reads an official notice on the website
Close
Stethoscope on laptop keyboard(Getty Images/iStockphoto)
Stethoscope on laptop keyboard(Getty Images/iStockphoto)

Odisha to recruit 2000 more MBBS, BDS students in new medical colleges, hospital

PTI
PUBLISHED ON JAN 20, 2021 11:35 AM IST
Aiming at strengthening healthcare services in Odisha, the state government on Tuesday said it will recruit 2,000 more MBBS and BDS students for appointment in the upcoming medical colleges and peripheral hospitals.
Close
India Post GDS Recruitment 2020. (HT File)
India Post GDS Recruitment 2020. (HT File)

India Post GDS Recruitment 2020: Last day to apply for 4269 vacancies

By Nandini
PUBLISHED ON JAN 20, 2021 10:44 AM IST
  • The online application process for India Post for recruitment against 4269 vacancies for the post of Gramin Dak Sevaks (GDS) in Karnataka and Gujarat circles is closing on Wednesday, January 20.
Close
UP chief minister Yogi Adityanath(PTI)
UP chief minister Yogi Adityanath(PTI)

3.75 lakh youth got jobs in UP since 2017: CM Adityanath

PTI
UPDATED ON JAN 20, 2021 10:27 AM IST
Uttar Pradesh Chief Minister Yogi Adityanath on Tuesday said 3.75 lakh youths were given jobs in the state in a transparent manner according to their merit since he took over in 2017.
Close
SHARE
Story Saved
OPEN APP