Results 81 to 90 of about 1,399 (188)

Merger-driven Growth of Intermediate-mass Black Holes: Constraints from Hubble Space Telescope Imaging of Hyper-luminous X-Ray Sources

open access: yesThe Astrophysical Journal
Hyper-luminous X-ray sources (HLXs) are extragalactic off-nuclear X-ray sources with luminosities exceeding the theoretical limit for accretion onto stellar-mass compact objects.
R. Scott Barrows   +3 more
doaj   +1 more source

Personalization and Fortification of In‐Space Manufactured Emulsified Beverages for Long‐Term Space Travel

open access: yesComprehensive Reviews in Food Science and Food Safety, Volume 25, Issue 5, September 2026.
ABSTRACT The current trend of individualized food items (nutrient content and flavor) can be particularly valuable to support people's health and well‐being in isolated environments where access to fresh foods and diverse nutrition is difficult. At the same time, bioactive compounds and micronutrients can be employed to countermeasure any health ...
Svenja Schmidt   +4 more
wiley   +1 more source

Identifying Signatures of Inflow onto Face-on Galaxies Using the Balmer Decrement

open access: yesThe Astrophysical Journal
Isolated star-forming galaxies require inflows of fresh gas from the surrounding medium to sustain episodes of star formation over time. However, there are very few direct detections of accretion onto external galaxies.
Meghna Sitaram   +6 more
doaj   +1 more source

The SVP–FRO6 Module Integrates the Control of Leaf Senescence and Flowering in Arabidopsis

open access: yesPlant, Cell &Environment, Volume 49, Issue 9, Page 7191-7209, September 2026.
ABSTRACT Plants coordinate major developmental transitions by integrating intrinsic genetic programs with environmental signals, where nutrient availability serves as a critical external factor shaping growth and fitness. Iron (Fe), an essential micronutrient for cellular respiration and photosynthesis, is strictly regulated through sophisticated ...
Hyunsu Park   +8 more
wiley   +1 more source

Baryon-induced Collapse of Dark Matter Cores into Supermassive Black Holes

open access: yesThe Astrophysical Journal Letters
Nonlinear structure formation for fermionic dark matter particles leads to dark matter density profiles with a degenerate compact core surrounded by a diluted halo. For a given fermion mass, the core has a critical mass that collapses into a supermassive
C. R. Argüelles   +2 more
doaj   +1 more source

When Communication Enables Catastrophe: Nuclear Risk and the Short Lifetimes of Technological Civilizations

open access: yesRisk Analysis, Volume 46, Issue 9, September 2026.
ABSTRACT The Fermi paradox may partly reflect technological self‐destruction acting as a Great Filter during post‐industrial development. Because the empirical record consists of a single civilization observed over an eighty‐year nuclear age, the exercise reported here is best understood as a structured, historically anchored scenario analysis rather ...
Vincenzo Alfano
wiley   +1 more source

Modeling the Spectral Energy Distribution of Active Galactic Nuclei: Implications for Cosmological Simulations of Galaxy Formation

open access: yesThe Astrophysical Journal
Modeling the spectral energy distributions (SEDs) of active galactic nuclei (AGNs) plays a very important role in constraining modern cosmological simulations of galaxy formation.
Tong Su   +5 more
doaj   +1 more source

Ongoing Morphological Transformation from Elliptical to Spiral Galaxies Induced by Gas Accretion from Neighboring Galaxies

open access: yesThe Astrophysical Journal
We present results from spectroscopic observations of three interacting galaxy systems, each associated with a primary galaxy—VCC 1748, SDSS J1106, and 2MASX J0834—which have been proposed as potential examples of reverse morphological transformation ...
Gene Yun   +4 more
doaj   +1 more source

Different Influence of Gas Accretion on the Evolution of Star-forming and Non-star-forming Galaxies

open access: yesThe Astrophysical Journal
Using integral field spectroscopic data from the Mapping Nearby Galaxies at Apache Point Observatory survey, we investigate the spatially resolved properties and empirical relations of a star-forming galaxy and a non-star-forming galaxy hosting ...
Min Bao, Wenlong Zhao, Qirong Yuan
doaj   +1 more source

Active Dwarf Galaxy Database. II. Connections between Host Galaxy Properties and Black Hole Accretion Signatures

open access: yesThe Astrophysical Journal
We investigate the connection between accretion signatures and host galaxy properties in the context of how active dwarf galaxies are identified. We use the database constructed in E. J. Wasleske & V. F.
Erik J. Wasleske   +2 more
doaj   +1 more source

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