Close

Search

Search Menu
Photonics Media Photonics Buyers' Guide Photonics Spectra BioPhotonics EuroPhotonics Vision Spectra Photonics Showcase Photonics ProdSpec Photonics Handbook
More News

New Camera Used to Measure Mass and Radius of Old Star

Facebook Twitter LinkedIn Email Comments
SHEFFIELD, England, April 16, 2019 — Scientists at the University of Sheffield have used HiPERCAM, a high-speed, multicolor camera that is capable of taking more than 1000 images per second, to measure both the mass and the radius of an old star (also called a cool subdwarf star) for the first time. HiPERCAM is mounted on the Gran Telescopio Canarias (GTC), the world’s largest optical telescope, with a 10.4-m mirror diameter.

HiPERCAM can take one picture every millisecond, in contrast to a traditional camera on a large telescope that can typically capture only one picture every few minutes. HiPERCAM’s speed enabled the scientists to measure the cool subdwarf star accurately. 

HiPERCAM high-speed camera images old star. University of Sheffield.

Artist’s impression of a binary star. Courtesy of Mark Garlick.

The new camera can be used to take high-speed images of objects in the universe, enabling their rapid brightness variations, which are due to phenomena such as eclipses and explosions, to be studied in more detail. Data captured by the camera, taken in five different colors simultaneously, will allow scientists to study the remnants of dead stars such as white dwarfs, neutron stars, and black holes.

Professor Vik Dhillon and researchers Steven Parsons and Stuart Littlefair from the University of Sheffield led the HiPERCAM project in partnership with the Science and Technology Facilities Council’s Astronomy Technology Centre (ATC) and the Instituto de Astrofisica de Canarias, along with researchers from the University of Warwick and Durham University.

“Now we have been able to measure the size of the star, we can see it is in line with stellar structure theory,” Dhillon said. “These results would not have been possible with any other telescope. This not only proves stellar structure theory, but has also verified the potential of HiPERCAM.”

The research was published in Nature Astronomy (https://doi.org/10.1038/s41550-019-0746-7). 

Photonics.com
Apr 2019
GLOSSARY
astronomy
The scientific observation of celestial radiation that has reached the vicinity of Earth, and the interpretation of these observations to determine the characteristics of the extraterrestrial bodies and phenomena that have emitted the radiation.
telescope
An afocal optical device made up of lenses or mirrors, usually with a magnification greater than unity, that renders distant objects more distinct, by enlarging their images on the retina.
Research & TechnologyeducationEuropeUniversity of Sheffieldimagingopticscamerashigh-speed camerasastronomyHiPERCAMcool subdwarftelescopemirrors

Comments
back to top
Facebook Twitter Instagram LinkedIn YouTube RSS
©2019 Photonics Media, 100 West St., Pittsfield, MA, 01201 USA, info@photonics.com

Photonics Media, Laurin Publishing
x We deliver – right to your inbox. Subscribe FREE to our newsletters.
We use cookies to improve user experience and analyze our website traffic as stated in our Privacy Policy. By using this website, you agree to the use of cookies unless you have disabled them.