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Blackholes

All articles tagged with #blackholes

X-ray Dot Bridges Little Red Dots and Growing Black Holes
space27 days ago

X-ray Dot Bridges Little Red Dots and Growing Black Holes

Astronomers using Webb and Chandra have identified a unique X-ray–emitting object, 3DHST-AEGIS-12014, about 11.8–12 billion light-years away, that appears as a “little red dot” yet glows in X-rays. The finding could mark a transitional phase between dusty, obscured little red dots and ordinary growing supermassive black holes, offering a key clue to how SMBHs form in the early universe. If this interpretation holds, it would link the LRD population to SMBH growth; further observations are planned to confirm the scenario.

via NASA Science (.gov)|
#astronomy#blackholes#earlyuniverse
Andromeda Star Quietly Forms a Black Hole Without a Supernova
science3 months ago

Andromeda Star Quietly Forms a Black Hole Without a Supernova

Astronomers tracked a massive star in the Andromeda Galaxy (M31-2014-DS1) that brightened in infrared in 2014, then faded and effectively disappeared by 2022–2023, indicating it collapsed into a black hole rather than exploding in a supernova. The remaining dust and gas emit a long-lasting mid-infrared glow as material slowly falls back, a process driven by convection that delays accretion and explains the dimming over decades. This event, linked to a similar case (NGC 6946-BH1), supports a broader class of failed supernovae and improves understanding of how some massive stars end their lives.

via ScienceDaily|
#andromeda#astronomy#blackholes
Supermassive Black Holes Eject Light-Speed Winds
science1 year ago

Supermassive Black Holes Eject Light-Speed Winds

Scientists have discovered that supermassive black holes emit high-velocity, bullet-like winds that are highly inhomogeneous and chaotic, challenging previous models of steady outflows. These clumpy winds can significantly influence galaxy evolution by regulating star formation, with implications for understanding black hole feedback and galaxy growth. Observations from XRISM are helping to unravel the complex structure and impact of these winds.

via Earth.com|
#blackholes#cosmology#galaxygrowth
Could Black Holes Be Lurking in Everyday Objects?
science1 year ago

Could Black Holes Be Lurking in Everyday Objects?

Scientists theorize that primordial black holes, potentially formed after the Big Bang, could be tunneling through Earth unnoticed. These tiny black holes might help explain cosmic mysteries like dark matter. Although the likelihood of detecting them is low, researchers suggest searching ancient structures for evidence. Discovering these black holes could advance our understanding of the universe and future energy harvesting technologies.

via Dazed|
#blackholes#cosmology#darkmatter
Gravitational Waves Unveil Hidden Cosmic Structures and Black Holes
science1 year ago

Gravitational Waves Unveil Hidden Cosmic Structures and Black Holes

Astronomers from Swinburne University have created the most detailed maps of gravitational waves, revealing hidden black holes and cosmic structures. Using the MeerKAT Pulsar Timing Array, they detected a strong gravitational wave signal from merging supermassive black holes, uncovering unexpected hotspots that suggest directional biases. This research offers new insights into the universe's evolution and the formation of massive black holes, challenging previous assumptions about the gravitational wave background's distribution.

via Phys.org|
#astronomy#blackholes#gravitationalwaves
science1 year ago

Scientists Unveil the Shape of Black Hole Coronas for the First Time

Astronomers have successfully determined the structure of black hole coronae, revealing them to be disk-like rather than spherical, using NASA's Imaging X-ray Polarimetry Explorer. This breakthrough provides new insights into black hole dynamics, particularly how they emit energy and interact with their surroundings, challenging existing models and enhancing our understanding of active galactic nuclei (AGNs). The study focused on obscured black holes, allowing researchers to isolate and analyze the corona's high-energy X-ray emissions, which are crucial for understanding black hole behavior and their influence on galaxy formation.

via The Daily Galaxy --Great Discoveries Channel|
#agn#astronomy#blackholes
"Debunking the Black Hole-Sun Conundrum: Scientists Explain"
science-and-astronomy2 years ago

"Debunking the Black Hole-Sun Conundrum: Scientists Explain"

Astrophysicist Matt Caplan and colleagues have proposed a theory that dark matter could be composed of atom-sized primordial black holes formed in the early universe. While it's highly unlikely that one of these black holes is inside the Sun, the researchers suggest that some stars, particularly in less massive environments like dwarf galaxies, might contain these black holes at their cores. These "Hawking stars," named after Stephen Hawking who theorized about primordial black holes, could potentially be identified by their unique red giant phase, which is accretion-powered rather than fusion-powered, making them puffier and dimmer. The team plans to use asteroseismology to observe candidate stars that may harbor these ancient black holes, offering a new avenue in the search for dark matter.

via Space.com|
##astrophysics#blackholes
science-and-technology2 years ago

"Exploring Black Hole Mysteries: Size Differences and Misconceptions"

Carlo Rovelli challenges common misconceptions about black holes, explaining that the singularity is not located at the center but rather in the future, as the funnel-shaped interior of a black hole stretches and narrows over time. Contrary to popular belief, the center of a black hole contains the collapsing star, not the singularity. The true singularity, where Einstein's equations fail and quantum effects dominate, lies in the future where the funnel's narrowing leads to infinite distortion of space-time. This insight is crucial for understanding the true nature of black holes and their singularities.

via IAI|
##blackholes#carlorovelli
"2023's Most Stunning James Webb Space Telescope Images: From Cosmic Cliffs to Pillars of Creation in 4K"
science-and-technology2 years ago

"2023's Most Stunning James Webb Space Telescope Images: From Cosmic Cliffs to Pillars of Creation in 4K"

NASA's James Webb Space Telescope has captured 13 groundbreaking images in 2023, offering new insights into the universe. Highlights include the most distant black hole ever detected, located 13.2 billion light-years away, and the Ring Nebula in unprecedented detail, revealing a secret star missed by Hubble. These images have advanced our understanding of star formation, galaxy evolution, and the early universe, while also raising new questions for astronomers.

via Business Insider|
##astronomy#blackholes
"Stephen Hawking's Dream of Creating Black Holes on Earth May Become Reality"
science3 years ago

"Stephen Hawking's Dream of Creating Black Holes on Earth May Become Reality"

Stephen Hawking had hoped that the Large Hadron Collider (LHC) at CERN would produce black holes, but the lawsuit filed against the LHC was dismissed, and the LHC has not yet made black holes. However, it is possible to create black holes by colliding particles with enough energy in a particle accelerator. Gravity and black holes challenge the idea that higher energies probe shorter distances, and the search for a unified framework that encompasses all basic laws of nature is ongoing. Thomas Hertog, a close collaborator of Hawking, discusses these topics in his new book.

via Livescience.com|
#blackholes#cern#largehadroncollider