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Alma

All articles tagged with #alma

The Milky Way’s Core Unveiled: A High-Resolution Map of Galactic Gas
science14 days ago

The Milky Way’s Core Unveiled: A High-Resolution Map of Galactic Gas

Astronomers released the largest, most detailed image of the Milky Way's center, created with ALMA's 66 antennas to map cold molecular gas and dust at millimeter wavelengths. The mosaic reveals intricate gas filaments and molecular fingerprints, offering new insight into how stars form in the extreme environment around the galactic center, including a mysterious millimeter ultra-broad line object (MUBLO) detected only by ALMA. The project will be complemented by JWST observations to place our Galaxy in broader cosmic context and to inform theories of solar-system formation.

via WBUR|
#alma#interstellar-medium#milky-way
Interstellar Comet 3I/ATLAS Carries Unprecedented Heavy Water, Hinting at Cold Birth
space18 days ago

Interstellar Comet 3I/ATLAS Carries Unprecedented Heavy Water, Hinting at Cold Birth

Astronomers analyzing the interstellar comet 3I/ATLAS found an exceptionally high amount of heavy water (deuterium-rich water), suggesting it formed in a much colder, lower-radiation environment than our solar system. This marks the first successful water analysis of an interstellar object and points to diverse planetary-forming conditions across the galaxy, with future studies likely to reveal more such visitors as observational capabilities improve.

via ScienceDaily|
#3iatlas#alma#deuterium
Rare Quasar Pair Merges in the Early Universe, Illuminating Black Hole Growth
astronomy29 days ago

Rare Quasar Pair Merges in the Early Universe, Illuminating Black Hole Growth

Astronomers confirmed a rare, merging quasar pair at z=5.7 (about 1 billion years after the Big Bang) using ALMA, revealing two massive galaxies connected by a tidal bridge; both host galaxies harbor more than 10 billion solar masses and rapid star formation, signaling intense black hole growth during early mergers, which are expected to form a true binary in ~2.1 billion years and may impact the gravitational wave background.

via The Daily Galaxy|
#alma#astronomy#black-holes
Interstellar Comet 3I/ATLAS Carries Frozen Clues From Ultra-Cold Star-Forming Realms
space1 month ago

Interstellar Comet 3I/ATLAS Carries Frozen Clues From Ultra-Cold Star-Forming Realms

Astronomers using ALMA detected an exceptionally high abundance of deuterated water (HDO) in interstellar comet 3I/ATLAS—more than 30 times what’s typical in solar-system comets and over 40 times Earth's ocean water—indicating the comet formed in environments colder than about 30 Kelvin, far colder than the region that formed our solar system. The finding suggests interstellar comets carry preserved birth-region chemistry and underscores that planetary formation varies with local temperature and radiation across the galaxy.

via The Daily Galaxy|
#3iatlas#alma#astrochemistry
3I/ATLAS Traces Ultra-Cold Origins of an Interstellar Comet
science1 month ago

3I/ATLAS Traces Ultra-Cold Origins of an Interstellar Comet

Astronomers using the ALMA Observatory found that interstellar comet 3I/ATLAS contains unusually high deuterium in its water, implying it formed in a very cold, loner star-forming region long before the Sun. The object could be the oldest known interstellar visitor (up to about 11 billion years old); its nucleus is estimated to range from a quarter-mile to 3.5 miles (440 meters to 5.6 kilometers) across, and it is speeding away from the Sun at roughly 137,000 mph. The findings, published in Nature Astronomy, add context to other interstellar visitors like Oumuamua and 2I/Borisov.

via ScienceAlert|
#3iatlas#alma#comet
Milky Way Core Exposed: ALMA Reveals Complex Gas Web at Galactic Center
science2 months ago

Milky Way Core Exposed: ALMA Reveals Complex Gas Web at Galactic Center

Astronomers using the ALMA array produced the largest mosaic of the Milky Way’s center to date, mapping the Central Molecular Zone across roughly 650 light-years and revealing a web of cold gas filaments and dense clouds that feed star formation. The ACES collaboration, involving about 160 scientists from over 70 institutions, aims to test how star formation and chemistry operate in this extreme galactic environment. The dataset will sharpen our understanding of the galaxy’s evolution and will be followed by upgrades to ALMA and future telescopes for even deeper studies.

via ScienceAlert|
#alma#central-molecular-zone#galactic-center
Interstellar Comet 3I/ATLAS Shows Methanol-Rich Chemistry
space2 months ago

Interstellar Comet 3I/ATLAS Shows Methanol-Rich Chemistry

ALMA observations reveal the interstellar comet 3I/ATLAS is unusually methanol-rich, with methanol originating from both the nucleus and coma. This chemical fingerprint suggests formation under conditions different from those of Solar System comets and provides a glimpse into the chemistry of distant star systems, with more interstellar visitors anticipated as powerful observatories come online.

via BBC Sky at Night Magazine|
#3iatlas#alma#astrochemistry
Interstellar Visitor 3I/ATLAS Exhibits Methanol-Rich Comet Chemistry
space2 months ago

Interstellar Visitor 3I/ATLAS Exhibits Methanol-Rich Comet Chemistry

ALMA observations of the interstellar object 3I/ATLAS reveal an unusually high methanol abundance in its coma and core—among the highest seen in comets—paired with a high methanol-to-hydrogen cyanide ratio, indicating distinctive formation conditions in that distant system. The methanol appears to come from both the core and the coma, and future observations with advanced telescopes could help explain the object’s origin as it exits the solar system.

via Futurism|
#3iatlas#alma#comet
Interstellar comet 3I/ATLAS reveals methanol-rich fingerprint from another star
astronomy2 months ago

Interstellar comet 3I/ATLAS reveals methanol-rich fingerprint from another star

ALMA observations show the interstellar comet 3I/ATLAS is unusually rich in methanol, released from both the nucleus and icy grains in the coma. The methanol-to-hydrogen cyanide ratio is higher than in Solar System comets, suggesting 3I/ATLAS formed under colder or chemically different conditions in another planetary system, providing a chemical fingerprint from a different star.

via Space|
#3iatlas#alma#astronomy
3I/Atlas Reveals Methanol-Rich Signature as It Leaves the Solar System
space2 months ago

3I/Atlas Reveals Methanol-Rich Signature as It Leaves the Solar System

Observations of interstellar comet 3I/Atlas show its coma is unusually rich in methanol—up to four times typical levels—along with carbon dioxide and other organics, suggesting formation in a colder or chemically distinct environment. The study, based on ALMA data, indicates methanol (and other gases) may be released from both the nucleus and sublimating icy grains in a hyperactive comet, supporting a natural origin. As it travels away from the Sun at about 60 km/s, 3I/Atlas reinforces that more interstellar visitors are likely to be found with advancing detection capability.

via WIRED|
#alma#astrochemistry#comets
Milky Way’s Galactic Core Unveiled in Record-Breaking ALMA Image
science2 months ago

Milky Way’s Galactic Core Unveiled in Record-Breaking ALMA Image

Using ALMA, astronomers released the largest image yet of the Milky Way’s center—the 650-light-year Central Molecular Zone—revealing a complex network of cold gas filaments that feed star-forming clumps; the ACES survey brings together 160 scientists from 70 institutions to study extreme central-galaxy conditions and test star-formation theories, with upgrades planned to probe even deeper.

via Universe Today|
#alma#astronomy#central-molecular-zone
Milky Way’s heart mapped: ALMA reveals a 3D gas map of star birth
space2 months ago

Milky Way’s heart mapped: ALMA reveals a 3D gas map of star birth

Scientists using the ALMA telescope captured the most detailed map yet of the Milky Way’s center, charting the cold molecular gas in the Central Molecular Zone and its motions with spectroscopy. The four-year ACES survey reveals where gas is shredding into stars and planets, offering insights into the solar system’s origins and serving as a window into conditions similar to the early universe, all produced by a large international collaboration and mapping more than 70 molecular lines.

via CNN|
#alma#central-molecular-zone#milky-way-center