tldrdailynews.com logo
Tag

Meerkat

All articles tagged with #meerkat

Feeble Radio Whispers Reveal the Blue Eye Pulsar After Decades of Silence
space8 days ago

Feeble Radio Whispers Reveal the Blue Eye Pulsar After Decades of Silence

Astronomers using the MeerKAT telescope detected faint radio pulses from the central compact object 1E 1207.4-5209—the Blue Eye Pulsar—located about 10,000 light-years away in the Milky Way. The neutron star emits radio waves every 424 milliseconds, matching its rotation and suggesting that some radio-quiet central compact objects can produce detectable radio emission under certain magnetic-field conditions, possibly triggered by a 2015 spin glitch. The finding implies a larger population of ultra-faint pulsars in the galaxy and could help explain missing pulsars in some supernova remnants, with the study published in Nature Astronomy on June 25.

via Space|
#meerkat#neutron-star#pulsars
Blue Eye Pulsar Finds Its Voice: Faint Radio Pulses Detected
science8 days ago

Blue Eye Pulsar Finds Its Voice: Faint Radio Pulses Detected

Using the MeerKAT radio telescope, astronomers detected very faint radio pulses from 1E 1207.4-5209, a central compact object at the center of a supernova remnant nicknamed the Blue Eye Pulsar, about 10,000 light-years away. The signal matches the 424-millisecond spin, marking the first detection of radio emission from this quiet neutron star after decades; a 2015 spin glitch may have reoriented or boosted its magnetic field to make the pulses detectable, suggesting many more such faint pulsars exist and possibly explaining missing pulsars in remnants like SN 1987A.

via Yahoo|
#central-compact-object#meerkat#neutron-star
MeerKAT spots record-distance hydroxyl megamaser, peering into the early universe
science1 month ago

MeerKAT spots record-distance hydroxyl megamaser, peering into the early universe

South Africa's MeerKAT radio telescope detected the most distant hydroxyl megamaser yet observed—in a violently merging galaxy more than 8 billion light-years away—thanks to gravitational lensing and wide bandwidth. The rapid 5-hour detection showcases MeerKAT's capabilities and foreshadows many more such discoveries with the SKA and ngVLA, offering new insights into galaxy evolution and extreme star-forming environments in the early universe.

via The Conversation|
#early-universe#gravitational-lensing#hydroxyl-megamaser
Quiet Galaxy Cluster Unveils a Giant 3.3-Million-Light-Year Radio Halo
science2 months ago

Quiet Galaxy Cluster Unveils a Giant 3.3-Million-Light-Year Radio Halo

Astronomers using the upgraded uGMRT and MeerKAT confirm a giant radio halo spanning 3.3 million light-years in the relatively quiet galaxy cluster RXCJ0232–4420, challenging the view that such halos only form in violent mergers. The halo shows a uniform spectral index around −1.1, extends across frequencies, and correlates with hot X-ray gas, with an eastern relic detected and the cluster in an intermediate dynamical state while preserving a cool core.

via The Daily Galaxy|
#galaxy-clusters#meerkat#radio-astronomy
Hidden Filaments in Milky Way Core Trace Ancient Black Hole Outflow
astronomy2 months ago

Hidden Filaments in Milky Way Core Trace Ancient Black Hole Outflow

Astronomers using the MeerKAT radio telescope found a new population of horizontal, 5–10 light-year filaments near the Galactic Center that point toward Sagittarius A*. Their thermal emissions and alignment along the galactic plane differ from previously known vertical filaments, suggesting a past energetic outflow from the Milky Way’s central black hole and offering clues about its accretion disk orientation and history.

via The Daily Galaxy|
#astronomy#filaments#meerkat
Hidden Vela-Banzi Supercluster Expands Our Cosmic Map
space2 months ago

Hidden Vela-Banzi Supercluster Expands Our Cosmic Map

Astronomers mapped the Vela-Banzi supercluster behind the Milky Way, stretching about 300 million light-years across with at least 20 galaxy clusters and a mass around 30 quadrillion suns, located roughly 800 million light-years away in the Zone of Avoidance; two massive cores are converging, indicating ongoing growth. The map draws on some 65,000 distance measurements and about 8,000 redshifts (including ~2,000 from MeerKAT), refining our view of nearby cosmic structure and cosmological models.

via The Daily Galaxy|
#meerkat#radio-astronomy#space
Cosmic Giant Vela Supercluster Mapped Behind the Milky Way
space2 months ago

Cosmic Giant Vela Supercluster Mapped Behind the Milky Way

Astronomers have for the first time mapped the Vela Supercluster, a colossal structure roughly 300 million light-years across that houses at least 20 galaxy clusters and contains about 30 quadrillion solar masses. Hidden behind the Milky Way’s Zone of Avoidance, the map was built from 65,000 existing distance measurements and ~8,000 new redshifts (including ~2,000 from the MeerKAT radio telescope), revealing two massive cores moving toward each other and placing Vela among the universe’s largest known structures—larger than Laniakea and rivaling the Shapley Supercluster. This new view could refine models of cosmic structure and dynamics, though parts of the spread will remain obscured by dust and gas.

via Live Science|
#cosmology#galaxy-clusters#meerkat
Gigamaser Beacon Detected From 8 Billion Light-Years Away by MeerKAT
science4 months ago

Gigamaser Beacon Detected From 8 Billion Light-Years Away by MeerKAT

Astronomers using the MeerKAT radio telescope detected a bright, narrow 18-centimeter hydroxyl emission line from the distant galaxy system HATLAS J142935.3-002836 at z=1.027 (about 8 billion light-years away). The signal is amplified by a foreground galaxy’s gravitational lensing and the background merger’s dense, energized gas, pushing it toward megamaser/gigamaser levels. The rapid detection in a few hours demonstrates MeerKAT’s capability to find distant hydroxyl emitters in wide surveys.

via The Daily Galaxy|
#galaxy-merger#gravitational-lensing#hatlas-j1429353-002836
Distant Galaxy Collision Yields Brightest Gigamaser Yet
science4 months ago

Distant Galaxy Collision Yields Brightest Gigamaser Yet

Astronomers using the MeerKAT radio telescope have detected the brightest and most distant hydroxyl gigamaser, produced when gas in colliding galaxies stimulates hydroxyl molecules to emit intense microwaves. The signal, traveling about 7.8–8 billion light-years, is magnified by a foreground galaxy acting as a gravitational lens, making it appear exceptionally bright. The discovery advances study of high-redshift OH megamasers and galaxy mergers and is published (preprint available) in Monthly Notices of the Royal Astronomical Society Letters.

via ScienceAlert|
#galaxy-collision#gigamaser#gravitational-lensing
Cosmic laser beacon: brightest megamaser seen from 8 billion light-years away via gravitational lensing
space4 months ago

Cosmic laser beacon: brightest megamaser seen from 8 billion light-years away via gravitational lensing

Astronomers using the MeerKAT radio telescope have detected the brightest and most distant hydroxyl megamaser from a galaxy merger about 8 billion light-years away. The signal, amplified by gravitational lensing, may qualify as a gigamaser and provides a rare beacon to study how ancient galaxies form and evolve; scientists hope to find many more such megamasers to map the cosmos’s history.

via Live Science|
#galaxy-merger#gravitational-lensing#hydroxyl
Cosmic Space Laser: Gigamaser Detected in Distant Galaxy
space4 months ago

Cosmic Space Laser: Gigamaser Detected in Distant Galaxy

Astronomers using the MeerKAT radio telescope detected a record-breaking microwave laser (a gigamaser) in a galaxy about 8 billion light-years away, magnified by gravitational lensing. The emission, arising from excited hydroxyl molecules during a galaxy merger, is roughly 100,000 times the luminosity of a star and is the most powerful maser yet observed. Upgrades to MeerKAT could uncover hundreds to thousands more such megamasers, offering insight into conditions in the distant universe.

via Futurism|
#gigamaser#gravitational-lensing#h1429-0028
Giant Rotating Cosmic Filament Rewrites How Galaxies Get Their Spin
astronomy4 months ago

Giant Rotating Cosmic Filament Rewrites How Galaxies Get Their Spin

An Oxford-led team identifies a giant, razor-thin cosmic filament about 140 million light-years away that is rotating with galaxies aligned to its spin, offering new insights into how galaxies acquire angular momentum and evolve. The finding, enabled by MeerKAT’s MIGHTEE survey and complemented by DESI and SDSS data, challenges existing models of galaxy formation within the cosmic web.

via The Daily Galaxy|
#angular-momentum#astronomy#cosmic-filaments
Deep Space Radio Bursts Hit Earth in Rapid Succession
science10 months ago

Deep Space Radio Bursts Hit Earth in Rapid Succession

A team using MeerKAT in South Africa discovered a highly active repeating fast radio burst source, FRB 20240619D, emitting hundreds of short radio pulses across multiple frequencies, providing valuable insights into the nature of these cosmic phenomena and their potential origins near magnetars, while also setting limits on optical counterparts and helping map the universe's ionized gas.

via Earth.com|
#cosmic-web#fast-radio-bursts#frb-20240619d