Black Hole Sterh 240
⚡ ALL INFORMATION CLICK HERE 👈🏻👈🏻👈🏻
Black Hole Sterh 240
The Center for Astrophysics | Harvard & Smithsonian
The Center for Astrophysics | Harvard & Smithsonian
Main navigation
Home
Big Questions
Research
People
Facilities & Technology
Academics & Opportunities
About
Resources
Utility Menu
News
Events
Breadcrumb
Home >
News >
‘We’ve Never Seen Anything Like This Before:’ Black Hole Spews Out Material Years After Shredding Star
Experts
Yvette Cendes
Edo Berger
See All Staff
Credit: DESY, Science Communication Lab
Wolbach Library, High Energy Astrophysics
The Harvard Astronomical Glass Plate Collection is an archive of roughly 500,000 images of the sky preserved on glass photographic plates, the way professional astronomers often captured images in the era before the dominance of digital technology. These plates are more than historical curiosities: they provide over a century’s worth of data that can be used by contemporary astronomers to trace how objects in the night sky change over periods from years to decades.
For that reason, the DASCH (Digital Access to a Sky Century @ Harvard) team are working to digitize the plates for digital storage and analysis. The process can also lead to new discoveries in old images, particularly of events that change over time, such as variable stars, novas, or black hole flares.
Optical and Infrared Astronomy, Central Engineering
GMACS - Moderate Dispersion Optical Spectrograph for the Giant Magellan Telescope is a powerful optical spectrograph that will unlock the power of the Giant Magellan Telescope for research ranging from the formation of stars and planets to cosmology.
For Scientists
High Energy Astrophysics, Optical and Infrared Astronomy, Solar, Stellar, and Planetary Sciences, Science Education Department
The Sensing the Dynamic Universe (SDU) project creates sonified videos exploring the multitude of celestial variables such as stars, supernovae, quasars, gamma ray bursts and more. We sonify lightcurves and spectra, making the astrophysics of variables and transients accessible to the general public, with particular attention to accessibility for those with visual and/or neurological differences.
SDU Website
Optical and Infrared Astronomy, Chandra X-ray Center
The Sloan Digital Sky Survey continues its twenty-year legacy of wide-field optical/infrared imaging and spectroscopy, which has led astronomy into the era of large archives and data science. Harvard and Smithsonian are both full institutional members of the latest epoch of the survey, SDSS-V, which started observations in 2020.
Footer Column Two
Big Questions
Research
People
Facilities & Technology
Opportunities
About
Footer Column Three
News
Events
Resources
Support Our Science
Professional Conduct
Footer Column Four
Current Night Sky
Careers
Contact Us
Intranet
Footer
Privacy
Center for Astrophysics Youtube Channel
Astronomers have observed a black hole burping up stellar remains years after it shredded and consumed the star.
Cambridge, MA – 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 — n o 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 collect ed 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.
R adio 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 s paghettified 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.
About the Center for Astrophysics | Harvard & Smithsonian
The Center for Astrophysics | Harvard & Smithsonian is a collaboration between Harvard and the Smithsonian designed to ask—and ultimately answer— humanity ’s greatest unresolved questions about the nature of the universe. The Center for Astrophysics is headquartered in Cambridge, MA, with research facilities across the U.S. and around the world.
Nadia Whitehead Public Affairs Officer Center for Astrophysics | Harvard & Smithsonian nadia.whitehead@cfa.harvard.edu
617-721-7371
Science & Technology
Black hole burps up shredded star
Science & Technology
Black hole burps up shredded star
For first time astronomers see black hole spewing stellar remains years after consuming star
Share
Email
Facebook
Twitter
LinkedIn
Is pandemic finally over? We asked the experts.
Building ‘bravery muscles’ to fight rising anxiety among kids
Harvard mathematician Melanie Matchett Wood named MacArthur Fellow
“This caught us completely by surprise — no one has ever seen anything like this before.”
— Yvette Cendes, Center for Astrophysics
Is pandemic finally over? We asked the experts.
Building ‘bravery muscles’ to fight rising anxiety among kids
Harvard mathematician Melanie Matchett Wood named MacArthur Fellow
Science
Better predictions on rise of oceans on warming Earth
Science & Technology
Better predictions on rise of oceans on warming Earth
Sign up for daily emails to get the latest Harvard news.
Harvard faculty on changes to views on school, work, winter’s likely surge, danger of ‘lethal inflexibility’
Harvard psychologist Elkins says pandemic worsened trend and screening, early intervention key to avoiding bigger problems
Freeman A. Hrabowski III praises, pushes Harvard in inaugural Martin Luther King Jr. Commemorative Lecture
Holocaust lecture, funded by refugees saved by Harvard students, warns anew on bigotry, authoritarianism
© 2022 The President and Fellows of Harvard College
Artist’s illustration of tidal disruption where a supermassive black hole spaghettifies and gobbles down a star. Some of the material is not consumed by the black hole and is flung back out into space.
Credit: DESY, Science Communication Lab
By Nadia Whitehead CfA Communications
Date October 11, 2022 October 11, 2022
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.
Sign up for daily emails to get the latest Harvard news.
Honored with ‘genius’ grant for ingenuity, promise in number theory
Harvard faculty on changes to views on school, work, winter’s likely surge, danger of ‘lethal inflexibility’
The Greenland Ice Sheet provided scientists with the evidence they needed to prove sea level fingerprints do exist.
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 merg
Holed Com Porno
French Milf Hard
Gilf Cum Whores Tumblr