Astronomers: Some Stars Have Something Akin to a Heartbeat - Futurism

Katie Ramirez
May 15, 2020

Advances have been made thanks to the observations of the space telescope TESS, NASA, and have been published in "Nature".

'It would be like a cat walking on a piano just playing random notes with no method to them, ' Bedding said. Bedding has indicated that such a change would help his team of researchers to decipher additional pulsations from more Delta Scuti stars.

The team focused on TESS data comprising a sample of 92,000 stars and, with some smart coding, was capable of developing a device to sort through the enormous data set quickly. "Now we can detect structure, more like listening to nice chords being played on the piano".

According to lead author of the study Prof.

"The findings have opened up entirely new horizons for better understanding a whole class of stars".

Delta Scuti stars, which are about twice as bright and hot as our Sun, are very common in the cosmos. These stars are about 60 to 1400 light years away. When considering the pulsations of this class of stars, space experts had recently recognized many pulsations; however, they had been not able to determine any specific patterns.

Daniel Hey, a PhD student at the University of Sydney and co-author on the paper, designed the software that allowed the team to process the TESS data. "It's going to allow us to measure these stars using asteroseismology in a way that we've never been able to do".

"From here we had to cut through the noise, leaving us with the clear patterns of the 60 stars identified in the study".

The researchers used a library of open source Lightkurve written in Python, for the treatment of 92 of thousands of light curves, showing how the magnitude of the star changes with time.

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The insides of stars were once a mystery to science.

Delta Scuti stars have been frustrating targets for scientists due to their complicated oscillations. That can shake up the pulsation patterns and make them hard to interpret.

This work allowed to detect the regularity with which the pulse of a massive star.

Co-author Isabel Colman (left), PhD candidate, University of Sydney, with lead author Professor Tim Bedding. As these changes occur at the same time, astronomers have hard to interpret what happens in the interior of estras stars from what they see on the surface, through what is known as asteroseismology. "This has been done with great success for many classes of pulsators including low-mass Sun-like stars, red giants, high-mass stars and white dwarfs". Interest was stars, related to the type of the Delta Shield, which is named in honor of the same stars with the same characteristics.

"Stars in space are oriented randomly so it's just a matter of luck which ones happen to be looking in that direction", Professor Bedding said. "The more we know about stars, the more we learn about their potential effects on their planets". In fact, there are variable stars, in which their brightness changes of a more or less regular, as your body contracts and expands, or as its outer layers are cooled or heated. "They haven't got the idea of "social distancing" rules yet".

The team based their research on data from NASA's Transiting Exoplanet Survey Satellite, which launched in 2018 with the goal of identifying planets outside our solar system.

He said: "We are thrilled that TESS data is being used by astronomers throughout the world to deepen our knowledge of stellar processes". Bedding's team used the TESS observations to create an asteroseismic model of HD 31901 that supports the younger age.

Well, in the scientific lingo, astronomers studied stellar pulsations - changes in brightness of light on the star's surface caused due to the vibrations within the star.

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