Subscribe to our free daily newsletters
. 24/7 Space News .




Subscribe to our free daily newsletters



STELLAR CHEMISTRY
Accretion-powered pulsar reveals unique timing glitch
by Staff Writers
London, UK (SPX) Sep 12, 2017


Composite image of the X-ray pulsar SXP 1062 surrounded by the supernova remnant. The false-color image combines X-ray (blue) and optical data (oxygen: green, hydrogen: red).

The discovery of the largest timing irregularity yet observed in a pulsar is the first confirmation that pulsars in binary systems exhibit the strange phenomenon known as a 'glitch'. The study is published in the journal Monthly Notices of the Royal Astronomical Society.

Pulsars are one possible result of the final stages of evolution of massive stars. Such stars end their lives in huge supernova explosions, ejecting their stellar materials outwards into space and leaving behind an extremely dense and compact object; this could either be a white dwarf, a neutron star or a black hole.

If a neutron star is left, it may have a very strong magnetic field and rotate extremely quickly, emitting a beam of light that can be observed when the beam points towards Earth, in much the same way as a lighthouse beam sweeping past an observer. To the observer on Earth, it looks as though the star is emitting pulses of light, hence the name 'pulsar'.

Now a group of scientists from the Middle East Technical University and Baskent University in Turkey have discovered a sudden change in the rotation speed of the peculiar pulsar SXP 1062. These jumps in frequency, known as 'glitches', are commonly seen in isolated pulsars, but have so far never been observed in binary pulsars (pulsars orbiting with a companion white dwarf or neutron star) such as SXP 1062.

SXP 1062 is located in the Small Magellanic Cloud, a satellite galaxy of our own Milky Way galaxy, and one of our nearest intergalactic neighbours at 200,000 light years away. Lead author of the study, Mr M. Mirac Serim, a senior PhD student working under the supervision of Prof Altan Baykal, said, "This pulsar is particularly interesting, since as well as orbiting its partner star as part of a binary pair, it is also still surrounded by the remnants of the supernova explosion which created it."

The pulsar is thought to pull in the leftover material from the supernova explosion, feeding on it in a process known as accretion. The team believe that the size of the glitch is due to the gravitational influence of its companion star and this accretion of the surrounding remnant material, which together exert large forces on the crust of the neutron star. When these forces are no longer sustainable, a rapid change in internal structure transfers momentum to the crust, changing the rotation of the pulsar very suddenly and producing a glitch.

"The fractional frequency jump observed during this glitch is the largest, and is unique to this particular pulsar", commented Dr Seyda Sahiner, a co-author of the study. "The size of the glitch indicates that the interiors of neutron stars in binary systems may be quite different to the interiors of isolated neutron stars."

Research paper

STELLAR CHEMISTRY
LOFAR Radio Telescope Discovers Record-Breaking Pulsar
Dwingeloo, Netherlands (SPX) Sep 07, 2017
Astronomers have discovered two rapidly rotating radio pulsars with the Low-Frequency Array (LOFAR) radio telescope in the Netherlands by investigating unknown gamma-ray sources uncovered by NASA's Fermi Gamma-ray Space Telescope. The first pulsar (PSR J1552+5437) rotates 412 times per second. The second pulsar (PSR J0952-0607) rotates 707 times per second, making it the fastest-spinning pulsar ... read more

Related Links
Royal Astronomical Society
Stellar Chemistry, The Universe And All Within It


Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Contributor
$5 Billed Once


credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly


paypal only

Comment using your Disqus, Facebook, Google or Twitter login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle

STELLAR CHEMISTRY
Diet tracker in space

Three astronauts blast off for five-month ISS mission

Crewed Missions Beyond LEO

Voyager Spacecraft: 40 Years of Solar System Discoveries

STELLAR CHEMISTRY
SLS Core Stage Simulator Will Pave Way for Mission Success

Arianespace announces a new contract, bringing its order book to 53 launches across three rockets

EUMETSAT signs with Arianespace for first Metop-SG satellite launch

MHI to launch first Inmarsat-6 satellite

STELLAR CHEMISTRY
45 Kilometers on the Odometry for Opportunity

New tools for exploring the surface of Mars

NASA's Curiosity Mars Rover Climbing Toward Ridge Top

New Gravity Map Suggests Mars Has a Porous Crust

STELLAR CHEMISTRY
Spacecraft passes docking test

China, Russia to Have Smooth Space Cooperation, Says Expert

Kuaizhou-11 to send six satellites into space

Russia, China May Sign 5-Year Agreement on Joint Space Exploration

STELLAR CHEMISTRY
India, Japan Set to Boost Space Cooperation

Bids for government funding prove strong interest in LaunchUK

Blue Sky Network Reaffirms Commitment to Brazilian Market

India to Launch Exclusive Satellite for Afghanistan

STELLAR CHEMISTRY
Dormant, Yet Always-Alert Sensor Awakes Only in the Presence of a Signal of Interest

Air Force activates new satellites for tracking space objects

'Peel-and-go' printable structures fold themselves

Ultrathin spacecraft will collect, deposit orbital debris

STELLAR CHEMISTRY
Hubble observes pitch black planet

The return of the comet-like exoplanet

Does the Organic Material of Comets Predate our Solar System?

X-rays Reveal Temperament of Possible Planet-hosting Stars

STELLAR CHEMISTRY
Hibernation Over, New Horizons Continues Kuiper Belt Cruise

Pluto features given first official names

Jupiter's Auroras Present a Powerful Mystery

New Horizons Files Flight Plan for 2019 Flyby




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News






The content herein, unless otherwise known to be public domain, are Copyright 1995-2017 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement