Black Hole Sterh

Black Hole Sterh

A password will be e-mailed to you.
A password will be e-mailed to you.
A password will be e-mailed to you.
Home All News Science Black Hole Spews Out Material Years After Shredding a Star: ‘We’ve Never...

TAGS Science Space Astronomy Research
The content you see here is paid for by the advertiser or content provider whose link you click on, and is recommended to you by Revcontent. As the leading platform for native advertising and content recommendation, Revcontent uses interest based targeting to select content that we think will be of particular interest to you. We encourage you to view your opt out options in Revcontent's Privacy Policy
Want your content to appear on sites like this? Increase Your Engagement Now!
Want to report this publisher's content as misinformation? Submit a Report
In October 2018, a small star was ripped to shreds when it wandered too close to a black hole in a galaxy located 665 million light years away from Earth.
Though it may sound thrilling, the event did not come as a surprise to astronomers who occasionally witness these violent incidents while scanning the night sky.
But nearly three years after the event the same black hole is lighting up the sky, and scientists believe that they’re witnessing the outflow of that star’s remnants years after it would normally happen, prompting a whirlwind of questions.
“This caught us completely by surprise—no one has ever seen anything like this before,” says Yvette Cendes, a research associate at the Center for Astrophysics at Harvard and lead author of a new study analyzing the phenomenon.
The team concludes that the black hole is now ejecting material traveling at half of the speed of light, but are unsure why the outflow was delayed by several years. The results, described this week in the Astrophysical Journal, may help scientists better understand black holes’ feeding behavior, which Cendes likens to “burping” after a meal.
The team spotted the unusual outburst while revisiting tidal disruption events (TDEs)—when encroaching stars are pulverized by black holes—that occurred over the last several years.
Radio data from the Very Large Array (VLA) in New Mexico showed that the black hole had mysteriously reanimated in June 2021. Cendes and the team rushed to examine the event more closely.
The team collected observations of the TDE, dubbed AT2018hyz, in multiple wavelengths of light using the VLA, the ALMA Observatory in Chile, MeerKAT in South Africa, the Australian Telescope Compact Array in Australia, and the Chandra X-Ray Observatory and the Neil Gehrels Swift Observatory in space.
Radio observations of the TDE proved the most striking.
“We have been studying TDEs with radio telescopes for more than a decade, and we sometimes find they shine in radio waves as they spew out material while the star is first being consumed by the black hole,” says Edo Berger, also at Harvard University and co-author on the new study.
“But in AT2018hyz there was radio silence for the first three years, and now it’s dramatically lit up to become one of the most radio luminous TDEs ever observed.”
TDEs are well-known for emitting light when they occur. As a star nears a black hole, gravitational forces begin to stretch, or spaghettify, the star. Eventually, the elongated material spirals around the black hole and heats up, creating a flash that astronomers can spot from millions of light years away.
Some spaghettified material occasionally gets flung out back into space. But the emission, known as an outflow, normally develops quickly after a TDE occurs, not years later.
Taking the conversation to Reddit, the astronomers were asked if the phenomenon was like how in a food processor, there’s a ring of material always just outside the reach of the blades.
“Basically yea,” Cendes replied . “This material was in an accretion disc surrounding the black hole after [the star] was unbound. In 20% of cases you then see a radio outflow at the part where it’s torn apart.”
The outflow of material is traveling as fast as 50% the speed of light. For comparison, most TDEs have an outflow that travels at 10% the speed of light, Cendes says .
“This is the first time that we have witnessed such a long delay between the feeding and the outflow,” Berger says. “The next step is to explore whether this actually happens more regularly and we have simply not been looking at TDEs late enough in their evolution.”
SHARE This Fun Fact With Your Space-Loving Friends…
You must be logged in to post a comment.

A black hole spewed out the remains of a star years after consuming it
"No one has ever seen anything like this before."
Three years ago, in October 2018, astronomers observed a black hole consuming and ripping a star apart in a galaxy 665 million light years away from Earth.
Now, only recently, the same astronomers observed the same black hole lighting the sky, despite the fact it hadn't sucked another star into its vicinity, a press statement reveals.
In a never-before-seen observation, the astronomers found that the black hole was ejecting, or regurgitating, the stellar material it consumed three years ago. The new finding could help the scientific community to better understand the feeding behavior of black holes and the crucial role it plays throughout the cosmos.
A new study detailing the astronomers' findings suggests the black hole is ejecting these stellar remnants at half the speed of light. The researchers don't understand why it took three years for this to occur, and they don't know what processes would have been acted on the stellar remains throughout that time period.
"This caught us completely by surprise — no one has ever seen anything like this before," explained Yvette Cendes, a research associate at the Center for Astrophysics | Harvard & Smithsonian (CfA) and lead author of the study. Cendes added that the behavior could be compared to someone "burping" after a meal.
Cendes and her colleagues spotted the never-before-seen phenomenon while re-observing black holes that had recently eaten stars in a phenomenon known as a tidal disruption event (TDE). In radio data captured in June 2021 by the Very Large Array (VLA) in New Mexico, they saw that the black hole in question had mysteriously started reanimating.
“We applied for Director’s Discretionary Time on multiple telescopes, which is when you find something so unexpected, you can’t wait for the normal cycle of telescope proposals to observe it,” Cendes said. “All the applications were immediately accepted.”
Thanks to that quick response, the team was able to collect data on the TDE, dubbed AT2018hyz, in numerous wavelengths of light using several state-of-the-art observatories, including the Chandra X-Ray Observatory, Neil Gehrels Swift Observatory, and the ALMA Observatory in Chile.
TDEs are known to emit vast amounts of light when they occur, due to the material from the star stretching out and heating up as it's consumed. However, the emissions typically occur almost straight away — not years later.
"It’s as if this black hole has started abruptly burping out a bunch of material from the star it ate years ago," Cendes said.
Next, the researchers aim to investigate whether this is a phenomenon that occurs often, but just hadn't been observed before, or if they really witnessed an incredibly rare cosmic event in action. Follow-up studies could help to shed new light on the mysterious inner workings of the many black holes at the center of galaxies throughout the universe.
This project aims to use olivine, a carbon-capturing mineral, to naturally capture billions of atmospheric carbon dioxide and with the power of the oceans.

Your source for the latest research news

make a difference: sponsored opportunity

Harvard-Smithsonian Center for Astrophysics. "Black hole spews out material years after shredding star." ScienceDaily. ScienceDaily, 12 October 2022. .
Harvard-Smithsonian Center for Astrophysics. (2022, October 12). Black hole spews out material years after shredding star. ScienceDaily . Retrieved October 13, 2022 from www.sciencedaily.com/releases/2022/10/221012103217.htm
Harvard-Smithsonian Center for Astrophysics. "Black hole spews out material years after shredding star." ScienceDaily. www.sciencedaily.com/releases/2022/10/221012103217.htm (accessed October 13, 2022).

RELATED TOPICS

Space & Time

Black Holes

Astronomy

Space Telescopes

Stars

Astrophysics

Galaxies

Space Exploration

NASA

RELATED TERMS

Supernova

Spitzer space telescope

Stellar evolution

Astronomy

Red giant

Black hole

Solar wind

Holographic Universe

July 11, 2022 — In 2019, astronomers observed the nearest example to date of a star that was shredded, or 'spaghettified,' after approaching too close to a massive black hole. That tidal disruption of a sun-like ...

May 2, 2022 — Astronomers discovered eight new echoing black hole binaries in our galaxy, enabling them to piece together a general picture of how a black hole evolves during an outburst. The findings will help ...

Jan. 10, 2020 — Recently, a Chinese team of astronomers claimed to have discovered a black hole as massive as 70 solar masses, which, if confirmed, would severely challenge the current view of stellar evolution. ...

Dec. 3, 2018 — The LIGO and Virgo collaborations have now confidently detected gravitational waves from a total of 10 stellar-mass binary black hole mergers and one merger of neutron stars, which are the dense, ...

Toggle navigation
Menu

S D

S D

Home Page

Top Science News

Latest News

View all the latest top news in the health sciences, or browse the topics below:
View all the latest top news in the physical sciences & technology, or browse the topics below:
View all the latest top news in the environmental sciences, or browse the topics below:
View all the latest top news in the social sciences & education, or browse the topics below:

Copyright 1995-2022 ScienceDaily or by other parties, where indicated. All rights controlled by their respective owners.
Content on this website is for information only. It is not intended to provide medical or other professional advice.
Views expressed here do not necessarily reflect those of ScienceDaily, its staff, its contributors, or its partners.
Financial support for ScienceDaily comes from advertisements and referral programs, where indicated.
Black hole spews out material years after shredding star https://www.sciencedaily.com/releases/2022/10/221012103217.htm
Astronomers have observed a black hole burping up stellar remains years after it shredded and consumed the star.
In October 2018, a small star was ripped to shreds when it wandered too close to a black hole in a galaxy located 665 million light years away from Earth. Though it may sound thrilling, the event did not come as a surprise to astronomers who occasionally witness these violent incidents while scanning the night sky.
But nearly three years after the massacre, the same black hole is lighting up the skies again -- and it hasn't swallowed anything new, scientists say.
"This caught us completely by surprise -- no one has ever seen anything like this before," says Yvette Cendes, a research associate at the Center for Astrophysics | Harvard & Smithsonian (CfA) and lead author of a new study analyzing the phenomenon.
The team concludes that the black hole is now ejecting material traveling at half of the speed of light, but are unsure why the outflow was delayed by several years. The results, described this week in the Astrophysical Journal , may help scientists better understand black holes' feeding behavior, which Cendes likens to "burping" after a meal.
The team spotted the unusual outburst while revisiting tidal disruption events (TDEs) -- when encroaching stars are spaghettified by black holes -- that occurred over the last several years.
Radio data from the Very Large Array (VLA) in New Mexico showed that the black hole had mysteriously reanimated in June 2021. Cendes and the team rushed to examine the event more closely.
"We applied for Director's Discretionary Time on multiple telescopes, which is when you find something so unexpected, you can't wait for the normal cycle of telescope proposals to observe it," Cendes explains. "All the applications were immediately accepted."
The team collected observations of the TDE, dubbed AT2018hyz, in multiple wavelengths of light using the VLA, the ALMA Observatory in Chile, MeerKAT in South Africa, the Australian Telescope Compact Array in Australia, and the Chandra X-Ray Observatory and the Neil Gehrels Swift Observatory in space.
Radio observations of the TDE proved the most striking.
"We have been studying TDEs with radio telescopes for more than a decade, and we sometimes find they shine in radio waves as they spew out material while the star is first being consumed by the black hole," says Edo Berger, professor of astronomy at Harvard University and the CfA, and co-author on the new study. "But in AT2018hyz there was radio silence for the first three years, and now it's dramatically lit up to become one of the most radio luminous TDEs ever observed."
Sebastian Gomez, a postdoctoral fellow at the Space Telescope Science Institute and co-author on the new paper, says that AT2018hyz was "unremarkable" in 2018 when he first studied it using visible light telescopes, including the 1.2-m telescope at the Fred Lawrence Whipple Observatory in Arizona.
Gomez, who was working on his doctoral dissertation with Berger at the time, used theoretical models to calculate that the star torn apart by the black hole was only one tenth the mass of our Sun.
"We monitored AT2018hyz in visible light for several months until it faded away, and then set it out of our minds," Gomez says.
TDEs are well-known for emitting light when they occur. As a star nears a black hole, gravitational forces begin to stretch, or spaghettify, the star. Eventually, the elongated material spirals around the black hole and heats up, creating a flash that astronomers can spot from millions of light years away.
Some spaghettified material occasionally gets flung out back into space. Astronomers liken it to black holes being messy eaters -- not everything they try to consume makes it into their mouths.
But the emission, known as an outflow, normally develops quickly after a TDE occurs -- not years later. "It's as if this black hole has started abruptly burping out a bunch of material from the star it ate years ago," Cendes explains.
In this case, the burps are resounding.
The outflow of material is traveling as fast as 50 percent the speed of light. For comparison, most TDEs have an outflow that travels at 10 percent the speed of light, Cendes says.
"This is the first time that we have witnessed such a long delay between the feeding and the outflow," Berger says. "The next step is to explore whether this actually happens more regularly and we have simply not been looking at TDEs late enough in their evolution."
Additional co-authors on the study include Kate Alexander and Aprajita Hajela of Northwestern University; Ryan Chornock, Raffaella Margutti and Daniel Brethauer of the University of California, Berkley; Tanmoy Laskar of Radboud University; Brian Metzger of Columbia University; Michael Bietenholz of York University and Mark Wieringa of the Australia Telescope National Facility.
Materials provided by Harvard-Smithsonian Center for Astrophysics . Note: Content may be edited for style and length.
Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:
Keep up to date with the latest news from ScienceDaily via social networks:
Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?

Monster Cock Fuck Guy
Rape Handjob
Hard Erotic Porn

Black Hole Sterh

Report Page