Astrophysics
Subfield of astronomy
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We include updates on Dark matter, Doppler effect, Cosmic microwave background, Dark energy, Black-body radiation, White hole, Event horizon, Redshift, Axion, Abundance of the chemical elements, Black body, Red giant, Compton scattering, Hydrostatic equilibrium, Graphical timeline from Big Bang to Heat Death, Strangelet ... and more.
| 2025 |
Nucleosynthesis
Direct evidence published for explosive nucleosynthesis through r-process in magnetar flaring, estimated to have created 1%–10% of heavier elements in the universe.
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| March 2025 |
Dark energy
The Dark Energy Spectroscopic Instrument (DESI) collaboration announced evidence for evolving dark energy by analyzing baryon acoustic oscillations (BAO) data combined with CMB, weak lensing, and supernovae datasets. The results suggest a slow decrease in dark energy density over time, with statistical significance ranging from 2.8 to 4.2σ.
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| 2024 |
Axion
CERN Axion Solar Telescope (CAST) reached the axion-photon coupling limit of 5.8 × 10^-11 GeV^-1 at 95% confidence level for axions with mass near 0.02 eV.
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| 2024 |
Lorentz factor
René Friedrich published 'Quantum Gravity Without Trouble', exploring the directional complexity of particle time and Lorentz factors in quantum systems.
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| 2024 | Bartol Research Institute celebrates its centennial. |
| 2024 |
Modified Newtonian dynamics
A study claimed that the universe's earliest galaxies formed and grew too rapidly to be explained by the Lambda-CDM model, but such rapid growth was predicted by MOND theory.
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| 2023 |
Redshift
The Sloan Digital Sky Survey published its eighteenth data release, continuing its long-term effort to map galaxies and quasars.
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| 2023 |
Redshift
The Sloan Digital Sky Survey published its fifth data release, continuing its extensive mapping of galaxies and quasars.
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| 2023 |
Toomre's stability criterion
Puschnig et al. conducted a high-resolution study of the star-forming galaxy SDSS J125013.84+073444.5 (LARS 8), using NOEMA interferometric observations and MUSE optical integral-field spectroscopy to perform a spatially resolved Toomre-Q analysis on sub-kiloparsec scales.
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| 2023 |
Dark galaxy
Nube, a potential dark galaxy, was discovered through deep optical imagery analysis in the Stripe 82 region. This discovery is significant as Nube is classified as an 'almost dark galaxy' due to its extremely low surface brightness.
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| 2023 |
Modified Newtonian dynamics
A study measured the acceleration of 26,615 wide binaries within 200 parsecs, demonstrating systematic deviations from Newtonian dynamics and conformity with MOND (AQUAL) predictions. The results remain disputed among researchers.
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| 2023 |
Modified Newtonian dynamics
A research study concluded that cold dark matter cannot adequately explain galactic rotation curves, while MOND provides a more comprehensive explanation.
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| June 2023 |
Multi-messenger astronomy
Astronomers led by Naoko Kurahashi Neilson used a new cascade neutrino technique to detect neutrinos from the Milky Way's galactic plane, creating the first neutrino-based galactic map.
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| May 2023 |
Axion
ALPS II experiment began collecting data in May, continuing the search for axion detection.
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| February 2023 |
Dark energy
Researchers from the University of Hawaiʻi at Mānoa formulated a new theory proposing that black holes gain mass as the universe expands, potentially explaining dark energy through a concept called 'cosmological coupling'.
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| 2022 |
Axion
João G. Rosa and Thomas W. Kephart used data from M87* to constrain the mass of axions, exploring their potential role in explaining dark matter and fast radio bursts.
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| 2022 |
Axion
The Event Horizon Telescope used polarized light measurements of Messier 87* to constrain the mass of axions, rejecting an approximate mass range by exploring hypothetical axion clouds around a black hole.
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| 2022 |
Modified Newtonian dynamics
Kroupa et al. published a study of open star clusters, arguing that asymmetry in tidal tails and cluster lifetimes are inconsistent with Newtonian dynamics but consistent with MOND theory.
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| 2022 |
Modified Newtonian dynamics
A survey of dwarf galaxies from the Fornax Deep Survey (FDS) catalogue was published, with astronomers and physicists concluding that observed deformations of dwarf galaxies in the Fornax Cluster and the lack of low surface brightness dwarfs towards its centre are incompatible with ΛCDM expectations but consistent with MOND theory.
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| August 2022 | Concluded his position as an Astrophysics lecturer and Reader at Lancaster University. |
| July 2022 |
Axion
New observations from the upgraded XENONnT observatory discarded the previous excess, eliminating the possibility of a new particle discovery.
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| 2021 |
Axion
Researchers suggested that an excess of hard X-ray emission from a system of neutron stars known as the 'magnificent seven' could potentially be explained by axion emission.
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| 2021 |
Axion
The MIT experiment published results reporting no evidence of axions in the mass range from 4.1x10−10 to 8.27x10−9 eV.
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| 2021 |
Przybylski's Star
Comprehensive experimental analysis of einsteinium isotope signature spectra was conducted, though no confirmation of presence in the star was published.
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| 2021 |
Dark energy
A group of researchers argued that observations of the Hubble tension may imply that only quintessence models with a nonzero coupling constant are viable.
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| 2021 |
Q-PACE
After launch, contact with the satellite could not be established, and the mission was feared to be lost.
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| 2021 |
Modified Newtonian dynamics
Unnamed researchers proposed a new relativistic model of MOND that is compatible with cosmic microwave background observations.
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| December 2021 |
Axion
ADMX excluded the range for the KSVZ axion model, advancing the search for dark matter axions.
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| December 2021 |
Axion
ADMX excluded the axion range for the KSVZ model in its ongoing search for dark matter axions.
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| November 2021 |
European Solar Telescope
The American Daniel K. Inouye Solar Telescope, which is considered the counterpart to the European Solar Telescope, finished its construction.
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| July 2021 |
Nucleosynthesis
First detection of a neutron star and black hole merger (NSBHs), though subsequent analysis suggests binary neutron star mergers are more significant for heavy metal production.
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| January 17 2021 |
Q-PACE
Q-PACE satellite was launched into orbit to conduct scientific research on particle aggregation and the meter size barrier in planetary formation.
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| 2020 |
Axion
A proposal was put forward suggesting that the axion field might have influenced the early Universe's evolution by potentially creating an imbalance between matter and antimatter, which could help resolve the baryon asymmetry problem.
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| 2020 |
Axion
The XENON1T experiment at the Gran Sasso National Laboratory in Italy reported a potential discovery of solar axions, though the results were not statistically significant enough for definitive confirmation.
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| 2020 | A measurement of a unique MOND (Modified Newtonian Dynamics) effect was recorded, offering another alternative explanation to dark matter. |
| 2020 | Nicolò D'Amico completed his presidential term at the National Institute for Astrophysics. |
| 2020 |
Modified Newtonian dynamics
A group of astronomers analyzed data from the Spitzer Photometry and Accurate Rotation Curves (SPARC) sample and galaxy catalogs, finding statistically significant evidence of violations of the strong equivalence principle in weak gravitational fields near rotationally supported galaxies. Their findings were consistent with Modified Newtonian Dynamics (MOND) and inconsistent with the Lambda-CDM cosmological model.
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| May 16 2020 |
Talk:September
User Xboxsponge15 suggested removing bullet points near flower images on the Wikipedia page for September, noting they look strange when placed next to images.
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| 2019 |
Axion
A team at the Max Planck Institute for Chemical Physics of Solids published their detection of an axion insulator phase in a Weyl semimetal material, demonstrating the existence of axion-like quasiparticles and validating axion electrodynamics.
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| 2019 | Observations of Andromeda showed a lack of microlensing effects, suggesting tiny black holes do not exist in significant numbers. |
| 2019 |
Space weather
The 116th Congress began considering the passage of the Space Weather Coordination Act (S141, 115th Congress).
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| 2019 |
Space weather
International Civil Aviation Organization (ICAO) implemented a Space Weather Advisory program, designating four global space weather service providers.
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| November 2019 |
Multi-messenger astronomy
Second high energy neutrino detected by IceCube, associated with tidal disruption event AT2019fdr.
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| October 1 2019 |
Multi-messenger astronomy
High energy neutrino detected at IceCube, with follow-up measurements identifying tidal disruption event AT2019dsg as a possible source.
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| 2018 | The Large Area Telescope (LAT) aboard the Fermi Gamma-ray Space Telescope began experiencing occasional outages, with disruptions ranging from a few hours to several days in duration. |
| 2018 | Colleen Wilson-Hodge and the Fermi GBM team received the Bruno Rossi Prize for detecting GRB 170817A, the first unambiguous electromagnetic counterpart to a gravitational wave signal, which confirmed that short gamma-ray bursts are produced by binary neutron star mergers. |
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This contents of the box above is based on material from the Wikipedia articles Doppler parameter, David Sobral, Lorentz factor, Bartol Research Institute, Space weather, Miyake event, Axion, Nuker Team, Modified Newtonian dynamics, Nucleosynthesis, Dark energy, Q-PACE, Redshift, Dark galaxy, Dark matter, Talk:September, Przybylski's Star, Fermi Gamma-ray Space Telescope, National Institute for Astrophysics, Multi-messenger astronomy, Doppler radio direction finding, Toomre's stability criterion & European Solar Telescope, which are released under the Creative Commons Attribution-ShareAlike 4.0 International License.