Supernova Blast Wave Still Visible After 30 Years

[Buster's Uncle]

Supernova Blast Wave Still Visible After 30 Years
Universe Today
by Nancy Atkinson Article Updated: 24 Feb , 2017



To celebrate 30 years since Supernova 1987A was spotted, a new composite image shows the most recent images of the object, and contains X-rays from NASA's Chandra X-ray Observatory (blue), visible light data from NASA's Hubble Space Telescope (green), and submillimeter wavelength data from the international Atacama Large Millimeter/submillimeter Array (ALMA) telescope in Chile (red).



30 years ago today, a supernova explosion was spotted in the southern hemisphere skies. The exploding star was located in the Large Magellanic Cloud — a satellite galaxy of the Milky Way – and Supernova 1987A was the brightest and nearest supernova explosion for modern astronomers to observe. This has provided an amazing opportunity to study the death of a star.

Telescopes around the world and in space have been keeping an eye on this event, and the latest images show the blast wave from the original explosion is still expanding, and it has plowed into a ring expelled by the pre-supernova star. The latest images and data reveal the blast is now moving past the ring.

Got a 3-D printer? You can print out your own version of SN1987A! Find the plans here.



Two different versions of 3-D printed models of SN1987A. Credit: Salvatore Orlando (INAF-Osservatorio Astronomico di Palermo) & NASA/CXC/SAO/A.Jubett et al.


Below is the latest image of this supernova, as seen by the Hubble Space Telescope. You can see it in the center of the image among a backdrop of stars, and the supernova is surrounded by gas clouds.



This new image of the supernova remnant SN 1987A was taken by the NASA/ESA Hubble Space Telescope in January 2017 using its Wide Field Camera 3 (WFC3). Credit: NASA, ESA, and R. Kirshner (Harvard-Smithsonian Center for Astrophysics and Gordon and Betty Moore Foundation) and P. Challis (Harvard-Smithsonian Center for Astrophysics)


Hubble launched in 1990, just three years after the supernova was detected, so Hubble has a long history of observations. In addition, the Chandra X-ray telescope – launched in 1999 – has been keeping an eye on the explosion too.

Here are a few animations and images of SN1987A over the years:

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This scientific visualization, using data from a computer simulation, shows Supernova 1987A, as the luminous ring of material we see today.  Credits: NASA, ESA, and F. Summers and G. Bacon (STScI); Simulation Credit: S. Orlando (INAF-Osservatorio Astronomico di Palermo)



This montage shows the evolution of the supernova SN 1987A between 1994 and 2016, as seen by the NASA/ESA Hubble Space Telescope. Credit: NASA, ESA, and R. Kirshner (Harvard-Smithsonian Center for Astrophysics and Gordon and Betty Moore Foundation) and P. Challis (Harvard-Smithsonian Center for Astrophysics)

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Here’s a link to the original astronomer’s telegram announcing the detection.

Astronomers estimate that the ring material was was ejected about 20,000 years before the actual explosion took place. Then, the initial blast of light from the supernova illuminated the rings. They slowly faded over the first decade after the explosion, until the shock wave of the supernova slammed into the inner ring in 2001, heating the gas to searing temperatures and generating strong X-ray emission.

The observations by Hubble, Chandra and telescopes around the world has shed light on how supernovae can affect the dynamics and chemistry of their surrounding environment, and continue to shape galactic evolution.



See additional images and animations at the Chandra website, ESA’s Hubble website, and NASA.


http://www.universetoday.com/133726/supernova-blast-wave-still-visible-30-years/

[Geo]

Wow, the explosion front of the supernova traveling about a thousand times faster then the ejected material of the ring.