Results 51 to 60 of about 1,546,467 (200)

Determining the Hubble constant using Giant extragalactic HII regions and HII galaxies [PDF]

, 2012
We report the first results of a long term program aiming to provide accurate independent estimates of the Hubble constant (H₀) using the L(Hβ) − σ distance estimator for Giant extragalactic HII regions (GEHR) and HII galaxies.
Elena Kirilovsky Terlevich, Manolis Plionis, RICARDO CHAVEZ MURILLO, ROBERTO GIOVANNI TERLEVICH AFONSO   +3 more
core  

Spin Dynamics in the van der Waals Ferromagnet CrTe2 Engineered by Niobium Doping

Advanced Functional Materials, Volume 36, Issue 73, 10 September 2026.
Spin‐dynamic magnetic properties of van der Waals (vdW) ferromagnet 1T‐CrTe2 are tuned via niobium (Nb) as Cr1‐xNbxTe2 (x = 0–0.2). Nb doping enables wide‐band tuning of the resonance frequency from 40 GHz down to the few‐GHz regime, accompanied by a moderate increase in the Gilbert damping from ∼0.066 to ∼0.14.
Dhan Raj Lawati, Prem Bahadur Karki, Jitender Kumar, Karishma Prasad, Mohamed A. Elekhtiar, Kai Huang, Bibek Tiwari, Suvechhya Lamichhane, Rupak Timalsina, Zane Hubble, Ayodimeji E. Aregbesola, John Watt, Sy‐Hwang Liou, Evgeny Y. Tsymbal, Jian Wang, Kapildeb Ambal, Abdelghani Laraoui   +16 more
wiley   +1 more source

Materials and Music: Selective Imperfection as a Generative Framework for Analysis, Creativity and Discovery

Interdisciplinary Materials, Volume 5, Issue 5, Page 834-867, September 2026.
Vibrations in matter, from spider webs to molecules, water to flames, share a grammar with music. We propose that creativity emerges when constraints force expansion beyond existing possibilities. Selective imperfection restores balance, enabling invention.
Markus J. Buehler
wiley   +1 more source

Clarifying the Hubble Constant Tension

, 2019
Our best estimate of the Universe's current expansion rate (the Hubble constant) from the local Universe (via the Cepheid distance ladder) is in four-sigma tension with the value extrapolated from cosmic microwave background data assuming the standard ...
Stephen Feeney (8173554), Stephen Feeney
core   +1 more source

Investigating Galactic Cosmic Ray Ionization’s Contribution to Aerosol Formation on Neptune and a Potential Link to the Relationship Between Brightness and Solar Activity

Journal of Geophysical Research: Planets, Volume 131, Issue 9, September 2026.
Abstract In this work we investigate how ionization from Galactic Cosmic Rays (GCRs) can affect aerosol nucleation on Neptune and discuss potential implications for the observed brightness variations that appear to follow the solar cycle. We calculate the planetary vertical cutoff rigidity for Neptune based on the O8 ${\mathrm{O}}_{8}$ magnetic field ...
Martin B. B. Enghoff, Paul N. Romani, John E. P. Connerney, John L. Jørgensen   +3 more
wiley   +1 more source

Saturn's Auroral Dusk Sector Magnetosphere‐Ionosphere Coupling During Cassini's Proximal Orbits

Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.
Abstract The final twenty‐two low‐altitude passes of the Cassini spacecraft enabled the determination of Saturn's field‐aligned currents (FACs) from magnetometer measurements at lower altitudes than previously achieved. We investigate southern dusk‐side FAC behavior with four objectives: how in situ MAG measurements compare to the highly variable ...
S. W. Farr, S. V. Badman, L. C. Ray, G. Provan, J. Kinrade, L. S. Clare   +5 more
wiley   +1 more source

A Dynamic Auroral Ionospheric Density Profile Reveals a Planetary‐Scale Cavity at Jupiter

Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.
Abstract Low‐altitude measurements above Jupiter's main auroras have shown the presence of persistent auroral density depletions. This low density regime strongly favors auroral acceleration by inertial Alfvén waves to explain the predominance of energetic (100–1,000 keV) broadband electron beams.
N. S. Kruegler, A. H. Sulaiman, S. S. Elliott   +2 more
wiley   +1 more source

Hubble constant by natural selection: Evolution chips in the Hubble tension

Astronomy and Computing, 2023
14 pages + refs, 7 figures, v3: discussion improved, new section added on ABC prior dependence, to appear in ASCOM, our codes in https://github.com/reggiebernardo/notebooks/tree/main/supp_ntbks_arxiv.2212 ...
Reginald Christian Bernardo, Y.-R. Lee
openaire   +2 more sources

International Graduates' Stay Rate, Country‐Level Economic Differences and Social Networks: Evidence From 25 European Countries

European Journal of Education, Volume 61, Issue 3, September 2026.
ABSTRACT This paper investigates the relationship between the stay rate of international university graduates, economic characteristics of their origin and destination countries, and proxies of their social networks. It contributes to the literature by jointly testing predictions of the neoclassical and migration network theories using regression ...
Filip Němeček
wiley   +1 more source

The Complete Life Cycle of Dark Spot NDS‐2018 on Neptune

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract The Hubble Space Telescope collected imaging data spanning the full lifetime of Neptune's dark spot NDS‐2018, which is the sixth large, persistent dark spot seen in the planet's atmosphere. Neptune's dark spots are thought to be anticyclonic vortices, although internal flows have never been directly measured to confirm their rotation. Previous
Michael H. Wong, Raúl Morales‐Juberías, Lawrence Sromovsky, Patrick Fry, Amy A. Simon, Patrick G. J. Irwin, Agustín Sánchez‐Lavega, Ricardo Hueso, Imke de Pater   +8 more
wiley   +1 more source