Begin typing your search above and press return to search.
Geert Wilders
access_time 28 Nov 2023 4:50 AM GMT
Cusat tragedy: Let experience be a lesson
access_time 27 Nov 2023 4:00 AM GMT
A Constitution always in the making
access_time 27 Nov 2023 11:43 AM GMT
How long will the ceasefire last?
access_time 25 Nov 2023 5:56 AM GMT
The signal from Silkyara tunnel incident
access_time 24 Nov 2023 5:53 AM GMT
This mind-set needs treatment
access_time 23 Nov 2023 4:46 AM GMT
Schools breeding hatred
access_time 14 Sep 2023 10:37 AM GMT
access_time 16 Aug 2023 5:46 AM GMT
A Constitution always in the making
access_time 27 Nov 2023 11:43 AM GMT
Debunking myth of Israel’s existence
access_time 23 Oct 2023 7:01 AM GMT
Homechevron_rightSciencechevron_rightStudying dust created...

Studying dust created by "twinkling" stars may shed light on how planets were formed

Studying dust created by twinkling stars may shed light on how planets were formed

Researchers have found a coincidence between variations in the quantity of dust produced by dusty asymptotic giant branch (AGB) stars, a kind of star somewhat older and larger than our Sun, and the intensity of dusty AGBs

The astronomers from the University of Tokyo in Japan claimed that since the dust produced in this way may result in the formation of planets, examining it may provide insight into the origins of and ultimately, life on Earth.

AGB stars are generally known to be producers of dust in the interstellar medium existing between and among stars. Among these, dusty AGBs are particularly prominent dust producers, shining light that varies widely.

The research team's long-period survey findings came from studying the data produced by AKARI and WISE, two infrared (IR) space telescopes surveying the cosmos. While these telescopes have concluded their initial missions, astronomers continue to make discoveries from the data they have produced.

The researchers have published their findings in the journal Publications of the Astronomical Society of Japan.

Lead researcher Kengo Tachibana said that the IR light coming from stars is a key source of information, helping astronomers unlock their secrets.

"Until recently, most IR data was from very short-period surveys due to the lack of advanced dedicated platforms. But missions like AKARI and WISE have allowed us to take longer-period surveys of things.

"This means we can see how things might change over greater time periods, and what these changes might imply.

"Lately, we turned our attention to a certain class of star known as asymptotic giant branch stars, which are interesting because they are the main producers of interstellar dust," said Tachibana.

Interstellar dust refers to heavy elements dispersing from stars, leading to the formation of solid objects including planets.

The astronomers said that it is yet unclear as to what the main drivers of this dust production are and where they should be looking to find this out.

"Our latest study has pointed us in the right direction," said Tachibana. "Thanks to long-period IR observations, we have found that the light from dusty AGBs varies with periods longer than several hundred days.

The astronomers further found that the spherical shells of dust produced by and then ejected by these stars have concentrations of dust that vary in step with the stars' changes in luminosity.

"Of the 169 dusty AGBs surveyed, no matter their variability period, the concentrations of dust around them would coincide. So, we're certain these are connected," said Tachibana.

The team of astronomers intends to continue their investigation by monitoring various AGB stars for many years continuously to explore the possible physical mechanisms behind dust production.

With PTI inputs

Show Full Article
TAGS:Planet creationDusty starsGiant stars
Next Story