The most important result was the unique composition of the new stars. They consist mostly of neon and oxygen, with no trace of hydrogen and helium, which are the dominant constituents of normal stars like the Sun.
How is this possible? Did FAU astronomers detect zombie-dwarfs, survivors of a supernova? Previous numerical simulations suggested that such an explosion would destroy the white dwarf completely. The former companion would be left behind and then ejected from the Milky Way at hyper-speed. New models, however, revealed that in specific conditions the white dwarf is not destroyed entirely. However, it remained unclear why these relics of a stellar death contain no carbon, which they should have according to the numerical models.
How is the white dwarf relic ejected — and what happens to the companion star? The researchers came up with a plausible explanation.http://4840.ru/components/handy/mohoq-spionage-software-kostenlos.php
One of the Milky Way’s fastest stars is an invader from another galaxy | Science | AAAS
The stellar companion had to be very close to the white dwarf for mass to be transferred to the latter, causing an explosion. This means both stars would be required to orbit their common centre of mass at extreme velocities. When the white dwarf exploded, it received a kick so strong that it broke the link between the binary stars, causing both partners to fly out in different directions at hyper-speed. The team has successfully discovered a new class of HVSs as well as identifying a new physical slingshot mechanism for HVSs.
The results have been accepted for publication in the renowned scientific journal Monthly Notices of the Royal Astronomical Society. The journal Nature has reported the paper as a research highlight.
Ulrich Heber Tel. For example, how bright the X-rays are, how they change over time, and how they are distributed across the range of energy that Chandra observes. In this case, the data suggest that the point-like source is one component of a binary star system. In such a celestial pair, either a neutron star or black hole formed when the star went supernova is in orbit with a star much larger than our Sun. As they orbit one another, the dense neutron star or black hole pulls material away its companion star through the wind of particles that flows away from its surface.
If this result is confirmed, DEM L would be only the third binary containing both a massive star and a neutron star or black hole ever found in the aftermath of a supernova. Chandra's X-ray data also show that the inside of the supernova remnant is enriched in oxygen, neon and magnesium. This enrichment and the presence of the massive star imply that the star that exploded had a mass greater than 25 times, to perhaps up to 40 times, that of the Sun.
One of the Milky Way’s fastest stars is an invader from another galaxy
Optical observations with the South African Astronomical Observatory's 1. A detailed measurement of the velocity variation of the massive companion star should provide a definitive test of whether or not the binary contains a black hole. Indirect evidence already exists that other supernova remnants were formed by the collapse of a star to form a black hole.
However, if the collapsed star in DEM L turns out to be a black hole, it would provide the strongest evidence yet for such a catastrophic event.
What does the future hold for this system? If the latest thinking is correct, the surviving massive star will be destroyed in a supernova explosion some millions of years from now. When it does, it may form a binary system containing two neutron stars or a neutron star and a black hole, or even a system with two black holes. A paper describing these results is available online and was published in the November 10, issue of The Astrophysical Journal.
Dickel and P. Edwards, M. Perry and R.
Hubble Snags First View of Supernova Explosion's Sole Survivor
I remember when Chandra first launched aboard shuttle, lots of PR over Cmdr. Thanks for allowing us to share in these magnificent discoveries. I am 15, and this is very interesting, I love space I think its so cool and adventurous and crazy how big our stars can be. A star cannot survive the supernova blast, being run out of fuel and energy, the blast is enough to bust it out. I am Marvin L. My question is what was it that this star was able to survive the blast from the Supernova? Marvin Lee Stacks. Images by Date. Image Use Policy. View Wavelengths Composite X-ray Optical.
Astronomers have found evidence for a companion star that survived the blast of a supernova explosion. Chandra's X-rays reveal a point-like source within the debris field produced when a massive star exploded. This system contains either a neutron star or black hole and a surviving massive star. Visitor Comments 5.
Posted by Don Lehner on Friday, Posted by Naman on Sunday, This was exciting to read and view. Thank you. Michael Peoni Posted by michael peoni on Friday,