Comments Subscribe to Personal Liberty News Feed Subscribe to Personal Liberty
 

Scientists Search For Reason Stars Get The Boot From The Milky Way

WASHINGTON (UPI) — A new type of hypervelocity stars, announced at a recent American Astronomical Society near Washington, has stumped astronomers.

Hypervelocity stars move so fast that they leave the Milky Way altogether. Astronomers said they think they can explain the 18 hypervelocity stars discovered since 2005, but a new group of 20 such stars, announced at a meeting of the American Astronomical Society outside of Washington, don’t seems to make sense, Time magazine reported Friday.

“What’s going on?” Vanderbilt University grad student Lauren Palladino, lead author of a paper published in the Astrophysical Journal on the stars, said. “We don’t know.”

Astronomers all agree that hypervelocity stars begin with a pair of binary stars giving each other lots of angular momentum as they orbit. When a binary gets too close to the black hole at the core of the Milky Way, one star is swallowed and the other keeps most of the momentum — along with the black hole’s gravity — and slingshots outward, Time said.

Palladino and several colleagues also searched for smaller, sun-like stars racing toward the Milky Way’s edge as well, finding that some rogue stars they found were coming from random directions, not the galactic center.

Theorists suggest a few ideas about what might have propelled these hypervelocity stars from their orbital path and sent them hurdling toward intergalactic space. Among the scenarios: They were spun out by a gravitational slingshot effect inside dense clusters of stars, or they were whipped to high speed by being too close to an exploding supernova, Time said.

Investigators say these explanations aren’t very persuasive.

“It’s very hard to kick a star out of the galaxy,” said Kelly Holley-Bockelmann, Palladino’s adviser and a co-author of the paper.

UPI - United Press International, Inc.

Since 1907, United Press International (UPI) has been a leading provider of critical information to media outlets, businesses, governments and researchers worldwide.

Facebook Conversations

Join the Discussion:
View Comments to “Scientists Search For Reason Stars Get The Boot From The Milky Way”

Comment Policy: We encourage an open discussion with a wide range of viewpoints, even extreme ones, but we will not tolerate racism, profanity or slanderous comments toward the author(s) or comment participants. Make your case passionately, but civilly. Please don't stoop to name calling. We use filters for spam protection. If your comment does not appear, it is likely because it violates the above policy or contains links or language typical of spam. We reserve the right to remove comments at our discretion.

Is there news related to personal liberty happening in your area? Contact us at newstips@personalliberty.com

Bottom
close[X]

Sign Up For Personal Liberty Digest™!

PL Badge

Welcome to PersonalLiberty.com,
America's #1 Source for Libertarian News!

To join our group of freedom-loving individuals and to get alerts as well as late-breaking conservative news from Personal Liberty Digest™...

Privacy PolicyYou can opt out at any time. We protect your information like a mother hen. We will not sell or rent your email address to anyone for any reason.