Massive Stars Found to Orbit a Partner --New Discovery
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July 27, 2012

Massive Stars Found to Orbit a Partner --New Discovery

 

             Ngc6357a_hst

 

An international team of researchers from the USA and Europe including from the University of Bonn under the direction of Dr. Hugues Sana at the University of Amsterdam has discovered that the most massive stars in the universe don't spend their lives in space as singles as was previously thought. More than two-thirds orbit a partner star.

"The orbit paths of the stars are very close together so that the region around these stars is turbulent and by far not as calm as previously thought," says Professor Norbert Langer from the University of Bonn. What happens is that one star can suck the material out of its companion like a vampire or both stars can melt to become an even larger massive star.

Astronomers evaluated more than ten years' worth of observations using one of the world's largest telescopes, the Very Large Telescope (VLT) in Chile's Atacama Desert.

*"The spectacular new research findings could only have been gathered based on one of the most extensive observation campaigns in this area," says Professor Robert Izzard. A total of 71 massive stars in six young galactic star clusters were observed for years. Through close-knit monitoring, researchers were able to determine the paths of over three-quarters of the double stars discovered which led to unique precision.

"The current study reveals that the fast majority of all massive stars spend their lives with a partner," states Fabian Schneider, the third scientist based in Bonn. Over time, roughly one-third of the star systems melts with their companion, while the other two-thirds transfer material to its partner.

Massive stars, also called spectral class O stars because of their characteristics are the brightest and the most short-lived stars in the universe. In the beginning they are more than 15 times as massive as our Sun. The end of their life is marked by spectacular supernova explosions or gamma ray bursts. They account for a large part of all the heavy elements in the universe.

"The new insight into the lives of massive stars has a direct impact on the understanding of the final stages most massive stars experience," says Professor Langer. The gigantic explosions at the end of a star's life can be observed from almost all corners of the universe.

One star in the open cluster Pismis 24, shown at the top of the page,  is over 200 times the mass of our Sun, making it a record holder. This star (shown below) is the brightest object located just to the right of the gas front in the above image.

Close inspection of images taken recently with the Hubble Space Telescope, however, have shown that Pismis 24-1 derives its brilliant luminosity not from a single star but from three at least. Component stars would still remain near 100 solar masses, making them among the more massive stars currently on record.

Toward the image left, stars are still forming in the associated emission nebula NGC 6357, including several that appear to be breaking out and illuminating a spectacular cocoon.  

 

           Hubble-massive-star-system-pismis-24-1_5

The Daily Galaxy via http://www.astro.uni-bonn.de/ and H. Sana et al., Science, July 27, 2012 (DOI 10.1126/science.1223344)

Image credit: NASA, ESA and J. M. Apellániz (IAA, Spain)

Comments

That's incredible. A single star feeding off another and vice versa. This demonstrates the coexistence of even the most inanimate objects in space.

I wonder what part of the larger atom they make up?

Our task is to explore the infinite universe through a window opening of one antimatter or even lesser. Might be the universe formed from one single antimatter. If it's true and the task is also possible.
Congratulation to our scientist. Incredible discovery.
Keep going.

Definitely fascinating stuff. Having it labeled as "New Discovery" threw me though. I had heard a while ago that they discovered that most stars live in binary pairs. They have been studying them for years, and maybe what I had heard previously was based off their research, and now they are making an official announcement. Still, great stuff.

Wow this is amazing. Im really glad to see information about this. Perhaps our sun also has a binary sibling! ^_^

this story is the newest at
Holographicgalaxy.blogspot.com

Gravity star models again fail to predict how the most massive stars are found interacting with another exact O-type star very close together. Electromagnetism ruling outer space and star formation evolution models is the real explanation.

In the ongoing evolution of our universe, massive star formation gives way to ever greater formations that seed the universe with heavy elements. What do these heavy elements mean in the evolution of future galaxies in the universe? In the galactic collision between the Milky Way and the Andromeda Galaxies when the new galaxy, the Dunkin Way Galaxy (because it goes good with milk[y] way), is it the norm for star formation throughout the universe?


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