Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Record: fastest flashing star

07.05.2004


Dutch researcher Steve van Straaten set a record during his doctoral research. The researcher registered the fastest ever change in the X-ray emission originating from a binary star. The record-breaking binary star consists of a neutron star and a lighter companion star.



Astronomer Steve van Straaten studied the time variations in the X-ray emission from various binary stars. He found that one of the binary stars had a vibrational frequency of 1330 Hz. This means that the intensity of the X-rays emitted changes 1330 times per second. That is the highest frequency ever measured for such a variation. The researcher used this information to determine the upper limit for the size and mass of the neutron star.

Neutron stars consist of the most compacted material in our universe. They have a mass comparable to that of our sun but they are about one quadrillion times smaller. If a neutron star and a normal star rotate around each other, matter can pass from the normal star to the neutron star. This happens as soon as the gravitational force of the normal star is no longer strong enough to stop its outer layers from being pulled away by the attractive force of the neutron star.


The matter originating from the star will move to the neutron star in a spiralling trajectory. The inner part of such a spiral-shaped disk and the surface of the neutron star are so hot that they emit high-energy X-rays. Changes in the intensity of this radiation are related to the movements of matter in the disk.

Van Straaten discovered that a relationship between the various movements around the neutron star is the same for different binary stars. Astronomers can use this discovery to develop new models for movement in the vicinity of a neutron star.

The research was funded by the Netherlands Organisation for Scientific Research.

Sonja Jacobs | NWO
Further information:
http://www.nwo.nl/nwohome.nsf/pages/NWOP_5XZEM5_Eng

More articles from Physics and Astronomy:

nachricht MEMS chips get metatlenses
21.02.2018 | American Institute of Physics

nachricht International team publishes roadmap to enhance radioresistance for space colonization
21.02.2018 | Biogerontology Research Foundation

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: In best circles: First integrated circuit from self-assembled polymer

For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.

In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...

Im Focus: Demonstration of a single molecule piezoelectric effect

Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale

Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...

Im Focus: Hybrid optics bring color imaging using ultrathin metalenses into focus

For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.

But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...

Im Focus: Stem cell divisions in the adult brain seen for the first time

Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.

The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...

Im Focus: Interference as a new method for cooling quantum devices

Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters

Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

2nd International Conference on High Temperature Shape Memory Alloys (HTSMAs)

15.02.2018 | Event News

Aachen DC Grid Summit 2018

13.02.2018 | Event News

How Global Climate Policy Can Learn from the Energy Transition

12.02.2018 | Event News

 
Latest News

Researchers invent tiny, light-powered wires to modulate brain's electrical signals

21.02.2018 | Life Sciences

The “Holy Grail” of peptide chemistry: Making peptide active agents available orally

21.02.2018 | Life Sciences

Atomic structure of ultrasound material not what anyone expected

21.02.2018 | Materials Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>