Astronomers discover fastest spinning white dwarf star
Astronomers discover fastest spinning white dwarf star
Astronomers have discovered the fastest spinning white dwarf star ever observed.
The white dwarf star completes a full rotation once every 25 seconds, researchers said.
They have established the spin period of the star for the first time, confirming it as an extremely rare example of a magnetic propeller system.
This is when the white dwarf is pulling material from a nearby companion star and flinging it into space at around 3,000 kilometres per second.
University of Warwick astronomers report it is only the second magnetic propeller white dwarf to have been identified in more than 70 years.
This was done using a combination of powerful and sensitive instruments that allowed scientists to catch a glimpse of the speeding star.
A white dwarf is a star that has burnt up all of its fuel and shed its outer layers, and is now in the process of shrinking and cooling over millions of years.
The star the Warwick team observed, named LAMOST J024048.51+195226.9 – or J0240+1952 for short, is the size of the Earth but is thought to be at least 200,000 times more massive.
Provided by PA Media Astronomers have discovered the fastest spinning white dwarf star (Mark Garlick/University of Warwick)
It is part of a star system and its immense gravity is pulling material from its larger companion star in the form of plasma.
In the past, this plasma was falling onto the white dwarf’s equator at high speed, providing the energy that has given it this dizzyingly fast spin.
In comparison, one rotation of the Earth takes 24 hours while on J0240+1952 it takes just 25 seconds.
That is almost 20% faster than the confirmed white dwarf with the most comparable spin rate, which completes a rotation in just over 29 seconds.
At some point in its evolutionary history J0240+1952 developed a strong magnetic field.
It acts as a protective barrier, causing most of the falling plasma to be propelled away from the white dwarf. What is left will flow towards the star’s magnetic poles.
Lead author Dr Ingrid Pelisoli, of the University of Warwick Department of Physics, said: “J0240+1952 will have completed several rotations in the short amount of time that people take to read about it, it is really incredible.
“The rotation is so fast that the white dwarf must have an above average mass just to stay together and not be torn apart.
“It is pulling material from its companion star due to its gravitational effect, but as that gets closer to the white dwarf the magnetic field starts to dominate.
“This type of gas is highly conducting and picks up a lot of speed from this process, which propels it away from the star and out into space.”
Co-author Professor Tom Marsh, from the University of Warwick Department of Physics, said: “It’s only the second time that we have found one of these magnetic propeller systems, so we now know it’s not a unique occurrence.
“It establishes that the magnetic propeller mechanism is a generic property that operates in these binaries, if the circumstances are right.
“The second discovery is almost as important as the first as you develop a model for the first and with the second you can test it to see if that model works.
“This latest discovery has shown that the model works really well, it predicted that the star had to be spinning fast, and indeed it does.”
The study, published in Monthly Notices of the Royal Astronomical Society: Letters, was led by the University of Warwick with the University of Sheffield, and funded by the Science and Technology Facilities Council (STFC), part of UK Research and Innovation, and the Leverhulme Trust.
Reference: By Nina Massey, PA Science Correspondent
Articles - Latest
- FROM WHITE MISCHIEF TO BILL & TED, JOSS ACKLAND WAS AN ACTOR OF RARE POISE, RANGE AND PATHOS
- FOUNTAINS OF DIAMONDS THAT ERUPT FROM EARTH'S CENTER ARE REVEALING THE LOST HISTORY OF SUPERCONTINENTS
- ANCIENT HUMANS USED CAVE IN SPAIN AS BURIAL SPOT FOR 4 MILLENNIA, 7,000 BONES REVEAL
- THE MOODY BLUES FOUNDER MIKE PINDER HAS DIED AGED 82
- GOLD POCKET WATCH FOUND IN TITANIC SOLD FOR RECORD-BREAKING PRICE
- 5 CATASTROPHIC MEGATHRUST EARTHQUAKES LED TO THE DEMISE OF THE PRE-AZTEC CITY OF TEOTIHUACAN, NEW STUDY SUGGESTS
- FRENCH PALME D’OR WINNER LAURENT CANTET DIES AGED 63
- Norman Lear obituary
- AN UNHOLY TRAFFIC: HOW THE SLAVE TRADE CONTINUED THROUGH THE US CIVIL WAR
- QUEEN CHARLOTTE WAS ‘PERSON OF COLOUR’, MUSEUM CLAIMS IN LGBT GUIDE
- JEANETTE WINTERSON: I DIDN’T BELIEVE IN GHOSTS… UNTIL I STARTED LIVING WITH THEM
- ANCIENT HUMAN ACTIVITY DISCOVERED IN KILOMETER-LONG LAVA CAVE
- DNA ANALYSIS SPANNING 9 GENERATIONS OF PEOPLE REVEALS MARRIAGE PRACTICES OF MYSTERIOUS WARRIOR CULTURE
- LOST CITIES HIDDEN FOR THOUSANDS OF YEARS DISCOVERED UNDER FOREST
- LETTER: ALAN ARKIN OBITUARY
- ARCHAEOLOGISTS CRACK MYSTERY OF ANCIENT MAYA AFTER 7,000-YEAR-OLD REMAINS FOUND
- NEW JERSEY REP. DONALD PAYNE JR. DEAD AT 65
- WORLD'S TALLEST WOMAN' MARIA FELICIANA DOS SANTOS, 7FT3, DIES AGED 77
- UNDERWORLD DISCOVERY CHALLENGES OUR UNDERSTANDING OF HUMAN EVOLUTION
- MUSLIM SOLDIER MEMORIAL FUND £1 MILLION TO IMPROVE RELATIONS AFTER ISLAMOPHOBIA ISSUES
- SCIENTISTS DISCOVER 1ST-OF-ITS-KIND CELL PART BORN FROM A SWALLOWED MICROBE
- NYC TIKTOK STAR EVA EVANS DIES AGED 29
- LADY GARDNER OF PARKES, CONSERVATIVE PEER WHO CHAMPIONED WOMEN’S RIGHTS IN THE EU AND UN – OBITUARY
Articles - Most Read
- Main
- Contact Us
- The science behind Ouija boards
- Cosmic Consciousness - What is Cosmic Consciousness-2
- Cosmic Consciousness-Introduction
- Cosmic Consciousness - Introduction-2
- MASSIVE 6.1 MAGNITUDE EARTHQUAKE HITS NEW ZEALAND AS NATION STILL REELING FROM CYCLONE
- ARCHAEOLOGISTS UNRAVEL THE TRUTH OF APHRODITE, GODDESS OF LOVE, ON VALENTINE'S DAY
- The Human Condition-Thomas Keating
- Cosmic Consciousness First Words - 1V - 2
- Cosmic Consciousness First Words - V -
- Cosmic Consciousness V - 2
- Cosmic consciousness - First Words - IV
- Cosmic Consciousness - What is Cosmic Consciousness?
- Evolution and Devolution-Chapter 2
- The Human Condition - Thomas keating-3
- The Human Condition-2-Thomas Keating
- Drinking From The Mountain Stream - Milarepa
- Cosmic Consciousness-On the Plane of Self Consciousness
- The Human Condition - 4
- Cosmic Consciousness - 3 - On the Plane of Self Consciousness
- Evolution and Devolution-Chapter 1
- The Human Condition - 6
- Shakyamuni Buddha or India the 1st “Black Revolutionary Hero.”
- On the Plane of Self Consciousness - 2
- Milarepa's World
- The Human Condition - 5
- Milarepa's World-2
- The Buddhist System of Liberation
- Contemplation and the Divine Therapy - 2
- On the Plane of Self Consciousness IV
- The Buddhist System of Liberation - 2
- JERRY RAWLINGS, GHANAIAN STRONG MAN WHO CAME TO POWER IN A COUP BUT INTRODUCED DEMOCRACY – OBITUARY
- On the Plane of Self Consciousness IV - 2