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ESO
@esoastronomy@mastodon.social  ·  activity timestamp 20 hours ago

For the first time ever, astronomers have unveiled the shape of a star’s explosion at its earliest stage.

The feat was achieved by ESO's Very Large Telescope just a day after the detection of this supernova, as the blast was breaking through the star’s surface.

This brief initial phase wouldn’t have been observable a day later. This will help shed light on how massive stars go supernova.

https://www.eso.org/public/news/eso2520/

Illustration: ESO/L. Calçada

#astrodon #astronomy #astrophysics #space #science

www.eso.org

Unique shape of star’s explosion revealed just a day after detection

Swift observations with the European Southern Observatory’s Very Large Telescope (ESO’s VLT) have revealed the explosive death of a star just as the blast was breaking through the star’s surface. For the first time, astronomers unveiled the shape of the explosion at its earliest, fleeting stage. This brief initial phase wouldn’t have been observable a day later and helps address a whole set of questions about how massive stars go supernova.
A digital illustration of a star going supernova, surrounded by a gaseous disc in orange and red tones. The star is seen exploding in an olive shape, directed above and below the star.
A digital illustration of a star going supernova, surrounded by a gaseous disc in orange and red tones. The star is seen exploding in an olive shape, directed above and below the star.
A digital illustration of a star going supernova, surrounded by a gaseous disc in orange and red tones. The star is seen exploding in an olive shape, directed above and below the star.
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Winfried Angele 🇺🇦🇪🇺
@winfried@fosstodon.org replied  ·  activity timestamp 9 hours ago

@esoastronomy "Artist’s impression of the initial shape of a supernova explosion"

Aren’t there enough fake images out there? You guys don’t need that.

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ESO
@esoastronomy@mastodon.social replied  ·  activity timestamp 20 hours ago

While the supernova appears as a point source from Earth, by observing it in polarised light astronomers were able to work out its shape.

Polarised light waves oscillate in a specific orientation. In a spherical surface the polarisation of all waves across the surface cancels out. But if the surface is elongated there's a net polarisation.

Watch our video summary: https://www.youtube.com/watch?v=mHHpONuSZA8

📷 ESO/Y. Yang et al.

Myth 1: Preprints aren’t peer-reviewed, so they must be low quality
A telescopic black and white image of a galaxy. The galaxy appears as a flat, oval-shaped disc, brighter in the centre, with swirling dark lanes. The supernova is a bright dot at the bottom-centre of the image, marked with a circle.
A telescopic black and white image of a galaxy. The galaxy appears as a flat, oval-shaped disc, brighter in the centre, with swirling dark lanes. The supernova is a bright dot at the bottom-centre of the image, marked with a circle.
A telescopic black and white image of a galaxy. The galaxy appears as a flat, oval-shaped disc, brighter in the centre, with swirling dark lanes. The supernova is a bright dot at the bottom-centre of the image, marked with a circle.
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