Results 171 to 180 of about 25,454 (269)

Could dark energy be changing over time? [PDF]

Proc Natl Acad Sci U S A
Mann A.
europepmc   +1 more source

Multi‐Dielectric Metasurfaces for Ultrabright, Tunable Structural Color and Reconfigurable Optical Filtering with Extraordinarily Large Color Span

Advanced Optical Materials, Volume 14, Issue 23, 19 June 2026.
Structural color generation is an emerging field for digital display and printing applications. This report presents a novel truncated‐cone design and the first use of GaP sandwiched between two layers of TiO2, demonstrating ultra‐bright, tunable colors with a record color gamut.
Md Rumon Miah, Yavuz Selim Aydın, Hilmi Volkan Demir   +2 more
wiley   +1 more source

Extreme properties of a compact and massive accreting black hole host in the first 500 Myr. [PDF]

Nat Commun
Tripodi R, Martis N, Markov V, Bradač M, Di Mascia F, Cammelli V, D'Eugenio F, Willott C, Curti M, Bhatt M, Gallerani S, Rihtaršič G, Singh J, Gaspar G, Harshan A, Judež J, Merida RM, Desprez G, Sawicki M, Goovaerts I, Muzzin A, Noirot G, Sarrouh GTE, Abraham R, Asada Y, Brammer G, Estrada-Carpenter V, Felicioni G, Fujimoto S, Iyer K, Mowla L, Strait V.   +31 more
europepmc   +1 more source

Slowly Rotating Traversable Wormholes Supported by Radially Varying String‐Fluid Matter: From Regular Geometries to Photon Trajectories

Annalen der Physik, Volume 538, Issue 6, June 2026.
This study examines slowly rotating traversable wormholes supported by string fluids whose properties change with radius. The matter smoothly shifts from a de Sitter‐like core to a string‐dominated exterior, producing a regular, horizon‐free spacetime.
A. Errehymy, B. Turimov, Meraj Ali Khan, S. Usanov, Z. Yasakov, Z. Avezmuratova   +5 more
wiley   +1 more source

Evidence of star cluster migration and merger in dwarf galaxies. [PDF]

Nature
Poulain M, Smith R, Duc PA, Marleau FR, Habas R, Durrell PR, Fensch J, Lim S, Müller O, Paudel S, Sánchez-Janssen R.   +10 more
europepmc   +1 more source

Repeating Nuclear Transients From Repeating Partial Tidal Disruption Events

Astronomische Nachrichten, Volume 347, Issue 5, June 2026.
ABSTRACT Extragalactic nuclear transients that exhibit repeating outbursts can be modeled as the repeated dynamical interaction between bound stars and supermassive black holes (SMBHs). A subset of these transients, with recurrence timescales of months‐to‐years, have been explained as accretion flares from the repeated tidal stripping of a star by an ...
Ananya Bandopadhyay, Eric R. Coughlin, Julia Fancher, C. J. Nixon, Dheeraj R. Pasham   +4 more
wiley   +1 more source

Status of the ΛCDM theory: supporting evidence and anomalies. [PDF]

Philos Trans A Math Phys Eng Sci
Peebles PJE.
europepmc   +1 more source

Quantifying the Impact of Relativistic Precession on Tidal Disruption Event Light Curves

Astronomische Nachrichten, Volume 347, Issue 5, June 2026.
ABSTRACT The tidal field of a black hole can turn a star into a gas stream whose orbit can precess, especially if the a black hole is rapidly spinning. In this work, we investigate the impact of precession on the light curves of tidal disruption events (TDE).
Diego Calderón, Ondřej Pejcha, Brian D. Metzger, Paul C. Duffell, Stephan Rosswog   +4 more
wiley   +1 more source

The quintom theory of dark energy after DESI DR2. [PDF]

Natl Sci Rev
Cai Y, Ren X, Qiu T, Li M, Zhang X.
europepmc   +1 more source

Hidden No More: Spotlight on Tidal Disruption Events in Active Galactic Nuclei

Astronomische Nachrichten, Volume 347, Issue 5, June 2026.
ABSTRACT Tidal disruption events (TDEs) are typically discovered in previously quiescent galaxies. However, earlier studies have revealed a handful of TDEs occurring in pre‐existing active galactic nuclei (AGN). We discuss AT2019aalc, a promising TDE candidate in an AGN, and compare it to similar sources.
Patrik Milán Veres
wiley   +1 more source