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The highest-quality JWST spectra reveal that little red dots are young supermassive black holes shrouded in dense cocoons of ionized gas, where electron scattering, not Doppler motions, broadens their spectral lines.

Two high-redshift post-starburst galaxies are in the process of quenching, although their quasars remain active, indicating the complex co-evolution between black hole activity and star formation.

An extreme Einstein ring ~10,000 times as bright as the Milky Way in the infrared is studied with VLT/ERIS and ALMA, and the authors find that the lensed galaxy is a starburst with a fast-rotating disk, rather than being driven by a major merger.

Little Red Dots (LRDs) are a high-redshift galaxy population with unclear nature. Here, authors show CANUCS-LRD-z8.6, a spectroscopically confirmed LRD, hosting an active galactic nucleus, and its properties provide insights for early black hole and galaxy formation.

As part of the JWST Advanced Deep Extragalactic Survey (JADES), NIRSpec has spectroscopically confirmed four young and metal-poor galaxies at redshift 10.3–13.2, from an early epoch of galaxy formation.

JWST spectroscopy confirms redshifts for two very luminous galaxies with z > 11, and also demonstrates that another candidate with suggested z ≈ 16 instead has z = 4.9.

The combination of JWST and ALMA data here unravel the history of the gas content of a quiescent galaxy, which became quenched through an act of self-sabotage. Black-hole accretion feedback heated the galaxy’s surrounding material, preventing its accretion.

JWST/NIRSpec observations of Abell2744-QSO1 show a high black-hole-to-host mass ratio in the early Universe, which indicates that we are seeing the black hole in a phase of rapid growth, accreting at 30% of the Eddington limit.

Analysis of the JWST/NIRSpec spectrum of the recently observed Lyman-break galaxy JADES-GS+53.15508-27.80178 revealed a redshift of z = 7.3, a Balmer break and a complete absence of nebular emission lines, indicating that quenching occurred only 700 million years after the Big Bang.

A method for measuring oxygen abundances using optical and far-infrared emission lines provides absolute metallicities of the interstellar gas in Markarian 71 and could be applied across cosmic history.

An (ultraviolet) dust attenuation feature at 2,175 Å, attributed to carbonaceous dust grains in the Milky Way and nearby galaxies, also exists in galaxies up to a redshift of 7.

White-light flares are rare solar events entailing emission in the optical continuum. Here, the authors report a nearly circular white-light flare observed on March 10th 2015 that contains simultaneously both impulsive and gradual white-light kernels.

The authors report the photometric detection of the distant spectroscopically confirmed galaxy JADES-GS-z14-0 at z > 14 with JWST/MIRI. The inferred properties suggest rapid mass assembly and metal enrichment during the earliest phases of galaxy formation.

High-resolution flare footpoint observations in the extreme ultraviolet and X-rays were taken by Solar Orbiter. Combined with simulations, the results reveal that the dominant mechanism carrying flare energy through the Sun’s atmosphere can vary on small spatial scales.

A type Ia supernova shows the presence of helium-rich circumstellar material, as demonstrated by its spectral features, infrared emission and a radio counterpart, that probably originates from a single-degenerate system in which a white dwarf accretes material from a helium donor star.

By assessing the ionization fraction of the environment around Tycho’s (type Ia) supernova, the authors have constrained the properties of its progenitor enough to rule out a hot, luminous white dwarf. A double white dwarf binary merger is allowed.

Observations of the young supernova remnant SNR 0509-67.5 in the Large Magellanic Cloud reveal concentric shells of ionized calcium and sulfur that resemble hydrodynamical simulations of the double detonation of a sub-Chandrasekhar-mass white dwarf.

Measuring atomic spectra in high magnetic fields is important for understanding astrophysical objects such as white dwarfs, but laboratory fields are too small to do so. Murdin et al. study the analogous spectra of phosphorous-doped silicon, whose material properties scale the equivalent field to far lower values.

Early high-resolution images of two 2021 novae reveal eruptions unfolding in multiple stages with colliding outflows that produce shocks and gamma rays, reshaping our understanding of stellar explosions.

The discovery of the most energetic transient event to date is reported. Its spectroscopic properties and temporal evolution imply it is powered by shock interaction between expanding material and large quantities of surrounding dense matter.

An extreme flare has been seen from a supermassive black hole at redshift z = 2.6. First detected in 2018, it is 30 times brighter than similar events. The most likely cause is the shredding of a star of 30 solar masses or more.

The discovery of a vast reservoir of primordial neutral hydrogen gas surrounding a young galaxy cluster just one billion years after the Big Bang offers new insight into how the first large cosmic structures assembled.

Ultra-hot Jupiters provide a unique window into atmospheric processes and this in-depth study enables integrated global snapshots of the atmosphere and more accurate identification of flow patterns, thus allowing for better comparison to models.

A massive galaxy hosting an accreting supermassive black hole two billion years after the Big Bang shows fast neutral-gas outflows that are capable of stopping star formation by removing its fuel while the stars keep rotating in a disk.

Evidence is found for a distant galaxy growing inside-out within the first 700 million years of the Universe. The galaxy has a dense central core comparable in mass density to local massive ellipticals, and an extended star-forming disc.

Ground-based and satellite observations show that the black hole in the ultraluminous X-ray source P13 has a mass of less than 15 times that of the Sun and displays the properties that typically distinguish ultraluminous X-ray sources from other stellar-mass black holes.

JWST–NIRSpec spectroscopic confirmation of two luminous galaxies is presented, proving that luminous galaxies were already in place 300 million years after the Big Bang and are more common than what was expected before JWST.

GS-9209 is spectroscopically confirmed as a massive quiescent galaxy at a redshift of 4.658, showing that massive galaxy formation and quenching were already well underway within the first billion years of cosmic history.

Observations of a third, less luminous persistent radio source associated with the repeating fast radio burst FRB 20201124A indicate that the burst originates from a young magnetar surrounded by a nebula of ionized gas.

RUBIES-EGS-QG-1 is an exceptionally massive and mature galaxy discovered just 1.2 billion years after the Big Bang. Its stars formed in an extremely rapid burst, posing a major challenge to all current theoretical models.

Spatially resolved JWST spectroscopy of a massive, quiescent galaxy at a redshift of ~4 reveals that it formed its stars and quenched rapidly, despite being surrounded by an abundant gas reservoir and gravitationally bound to a star-bursting companion.

Gas breakdown mechanism in plasma under the influence of complex electromagnetic field topology is still debatable. Here the authors present the evidence of the E×B mixing avalanche for gas breakdown in magnetized plasmas in fusion devices as tokamak.

The rapid rise in brightness of a tidal disruption event is attributed to the destruction of a main sequence star by a black hole of intermediate mass in a dwarf galaxy. Such events are rare, and non-accreting intermediate-mass black holes are challenging to find.

A strongly lensed galaxy at redshift z ≈ 6 is resolved into at least 15 star-forming clumps embedded in a rotating disk. Clump formation in this system, which is not predicted by cosmological zoom-in simulations, may be driven by disk instabilities with weak feedback, rather than past mergers.

WD 0032–317B is a 75–88-Jupiter mass companion orbiting a hot white dwarf with a period of 2.3 h. It has a day-side temperature of about 8,000 K and a day–night difference of ~6,000 K. WD 0032–317B is amenable to detailed characterization and can be used as a proxy for strongly irradiated ultra-hot giant planets.