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Astronomy & Astrophysics

Astronomy & Astrophysics (A&A) is a peer-reviewed European journal covering observational, theoretical, and instrumental research in astrophysics.

Known aliases

  • A&A
  • Astronomy and Astrophysics

Current stories

scienceConfirmed2 publishers

X-ray data trace the radio 'Treble Clef' to a black hole outburst and a later cluster merger

A team led by Andrea Botteon used Chandra and eROSITA X-rays to trace the radio 'Treble Clef' to a black hole outburst and a cluster collision. The authors call the two-stage origin likely; the merger evidence comes from the shape of the cluster's hot gas.

Publishers:nasa.gov phys.org space.com

Perspective Coverage

3 publishers
Builder
Builder 15%
Operator
Operator 7%
Investor
Investor 78%

Reality

Evidence62
Adoption
Not scored
Hype gap+10
Incentives
Not scored
Confidence60
scienceOne report1 publisher

ALMA's COMPASS survey detects methanol masers around more than half of 11 infant sun-like stars

ALMA's COMPASS survey found methanol masers around more than half of the 11 infant sun-like stars it studied. The survey puts organic chemistry around stars that are still forming, though its first papers do not trace any of it into a planet.

Publishers:phys.org

Reality

Evidence55
Adoption
Not scored
Hype gap+20
Incentives60
Confidence60
scienceOne report1 publisher

Astronomers propose a second, tilted disk to explain GJ 3090 b's backward orbit around a red dwarf

University of Geneva astronomers and colleagues report that GJ 3090 b circles its red dwarf backward, 136 degrees out of line with the star's spin. Finding no companion able to flip it, the team suggests the planet formed in a second, tilted disk.

Publishers:livescience.com

Reality

Evidence58
Adoption
Not scored
Hype gap+8
Incentives
Not scored
Confidence50
scienceOne report1 publisher

GJ 3090 b runs backward around its M dwarf at 136 degrees to the star's equator

Planets inherit their direction of travel from the disk that formed them. A planet running backward around a small cool star is therefore a formation problem, and one team's answer is a second disk, tilted from the first.

Reality

Evidence66
Adoption
Not scored
Hype gap+12
Incentives38
Confidence62
scienceOne report1 publisher

Radio images catch a Milky Way black hole pointing its jet at Earth

IRAS 18293-0941 is the first microblazar found in our own galaxy. The authors say the spot where its jet strikes a molecular cloud accelerates particles to petaelectronvolt energies, matching a gamma-ray signal there.

Publishers:phys.org

Reality

Evidence62
Adoption
Not scored
Hype gap+18
Incentives55
Confidence58
scienceOne report1 publisher

Webb finds the gas blown out of early dead galaxies mostly falls back

Pengpei Zhu's group used JWST to weigh the neutral gas streaming out of 23 quiescent galaxies from the universe's first two billion years, and the speeds they measured keep most of that gas gravitationally bound.

Publishers:phys.org

Reality

Evidence62
Adoption
Not scored
Hype gap+12
Incentives38
Confidence57
scienceOne report1 publisher

A by-eye search of VST images multiplies the known dwarf galaxies around three hosts twelvefold

An INAF-led team searched the deepest optical images yet taken of the fields around NGC 5068, NGC 5084 and NGC 5087 by eye, logging 47 dwarf galaxy candidates that spectroscopy has still to confirm as satellites.

Publishers:phys.org

Reality

Evidence66
Adoption
Not scored
Hype gap+22
Incentives62
Confidence57
scienceOne report1 publisher

Principal component analysis reads a brown dwarf's weather from its JWST light curve

Astronomers at Trinity College Dublin report that two components account for most of what changes in SIMP 0136's rotating spectrum, a decomposition they hope to refine for fainter brown dwarfs.

Publishers:phys.org

Reality

Evidence55
Adoption15
Hype gap+25
Incentives60
Confidence55
scienceOne report1 publisher

Simulated tides near Sagittarius A* destroy enough binaries to match the S cluster's count

Rodrigo Silva's team at Coimbra counted 43% of the S-cluster stars as binaries, then ran 100,000 simulated pairs through the black hole's tides for a million years and finished at 38%, close enough to argue the stars were born where they orbit.

Publishers:phys.org

Reality

Evidence58
Adoption
Not scored
Hype gap+15
Incentives30
Confidence55
scienceOne report1 publisher

Beryllium excess in a sun-like star traces more than 11 Earth masses of swallowed rock

Lithium is destroyed too easily to keep the record for long, so a team at the University of Sao Paulo turned to beryllium, and found it enriched in one member of a solar-type pair alongside the metals that build rocky planets.

Publishers:phys.org

Reality

Evidence64
Adoption
Not scored
Hype gap+18
Incentives58
Confidence57
scienceOne report1 publisher

A FAST survey of 55 galaxies turns up two starless hydrogen clouds near M51

Each cloud holds about 3 million solar masses of hydrogen inside a halo of 3.7 billion, the gas fraction cold dark matter models predict for a halo that never made a star, and also what a tidal tail could imitate.

Publishers:phys.org

Reality

Evidence62
Adoption
Not scored
Hype gap+10
Incentives35
Confidence55
scienceOne report1 publisher

ALMA's first post-dimming image of Betelgeuse finds its brightest hot spot still in place

The first millimetre imaging of Betelgeuse since the 2020 dimming shows an inner atmosphere growing lopsided, and whether its newly found companion shaped that pattern depends on an orbital geometry the team has yet to measure.

Publishers:phys.org

Reality

Evidence62
Adoption
Not scored
Hype gap+12
Incentives48
Confidence52
scienceOne report1 publisher

The VLT images a companion beside Betelgeuse at two to three solar masses

The detection landed in the December 2024 window that two earlier papers predicted, and it landed at all because the companion is heavier than the models said; one more epoch on the far side would close a century-old case.

Publishers:sciencedaily.com

Reality

Evidence62
Adoption34
Hype gap+22
Incentives60
Confidence58
scienceOne report1 publisher

Betelgeuse's 2,200-day cycle finally has a candidate object, found where models said to look

A SPHERE/VLT detection at 6 sigma places a faint companion at the separation two papers predicted for December 2024. Confirmation waits on catching it on the far side.

Publishers:physicsworld.com

Reality

Evidence60
Adoption
Not scored
Hype gap+18
Incentives58
Confidence52
scienceOne report1 publisher

Chandra spends 634,000 seconds on one quasar and finds a cluster's hot gas already there

A 21-million-Kelvin halo at redshift 3.25 already holds a mature cluster's share of normal matter, before the epoch when such gas was expected to start warming.

Publishers:phys.org

Reality

Evidence58
Adoption
Not scored
Hype gap+18
Incentives38
Confidence52
scienceOne report1 publisher

Water found 0.55 light-years from the Milky Way's black hole, in a dying star's shell

JWST spectra of the star IRS 3 show silicate dust and water surviving near Sagittarius A*, and reclassify the star as oxygen-rich rather than carbon-rich.

Publishers:livescience.com

Reality

Evidence62
Adoption
Not scored
Hype gap+12
Incentives40
Confidence52