Results 91 to 100 of about 6,292 (199)

Characterization of the Outer Uranian Rings in the Visual and Near‐IR Using Keck, JWST, and HST Observations

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract We present observations of the Uranian outer ring system at near‐infrared and visible wavelengths. Observations with the Keck Telescope were taken in July‐August 2007 at 2.12 and 1.63 μm, when the ring plane was almost edge‐on (ring opening angle B=0.62 $B=0.62$–0.24° ${}^{\circ}$). These data showed, for the first time, the μ ring at infrared
Imke de Pater, Mark R. Showalter, Matt M. Hedman, Heidi B. Hammel, Mike Roman, Leigh N. Fletcher, Maryame El Moutamid, Damya Souami   +7 more
wiley   +1 more source

Remarks on overestimating the effects of inhomogeneities on the Hubble constant

, 2023
The Hubble constant is one of the most important parameters in cosmology. Discrepancies in values of the Hubble constant estimated from various measurements, the so-called Hubble tension, are a serious problem.
Miura, Taishi, Tanaka, Takahiro
core  

Spatial and Energy Dependence of Energetic Electron Precipitation Originating From Jupiter's Inner and Middle Magnetosphere

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract Energetic electron precipitation transfers trapped magnetospheric energy into Jupiter's atmosphere, yet its contribution beyond the main auroral oval has to be fully quantified. This study statistically investigates the atmospheric energy input from electrons in the 30 keV–1.2 MeV range using in situ measurements from the Juno spacecraft ...
Domenique Freund, George Clark, Lauren W. Blum, Zhi‐Gu Li   +3 more
wiley   +1 more source

Motional Induction in Ganymede's Ocean

Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.
Abstract We investigate the magnetic signature of oceanic circulation in Ganymede's subsurface ocean using kinematic induction modeling. Our approach couples zonal jet flows from rotating thermal convection simulations with magnetic field models incorporating Ganymede's internal dynamo and external contributions from Jupiter.
Simon Cabanes, Thomas Gastine, Alexandre Fournier   +2 more
wiley   +1 more source

Auroral Emissions on Ganymede: New Constraints on Their Electron Energy Dependence

Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.
Abstract Auroral emissions on Ganymede provide critical insights into its magnetospheric dynamics and atmospheric composition. Using a physics‐based atmospheric model with recent atmospheric observations and laboratory measurements of electron‐impact cross‐sections, this study revisits and significantly refines the relationship between auroral emission
Xin Cao, Mika K. G. Holmberg, Caitriona M. Jackman, Hans L. F. Huybrighs, Sebastian Cervantes, Audrey Vorburger   +5 more
wiley   +1 more source

The pursuit of the Hubble Constant using Type II Supernovae

, 2023
The use of multiple independent methods with their own systematic uncertainties is crucial for resolving the ongoing tension between local and distant measurements of the Hubble constant ($H_{0}$). While type Ia supernovae (SNe Ia) have historically been
Galbany, L., de Jaeger, T.
core  

Late time interacting cosmologies and the Hubble constant tension

, 2022
In this manuscript we reassess the potential of interacting dark matter-dark energy models in solving the Hubble constant tension. These models have been proposed but also questioned as possible solutions to the $H_0$ problem.
Nunes, Rafael C., Gariazzo, S., Mena, Olga, Mena Requejo, Olga, Di Valentino, Eleonora, Nunes, R.C., Olga Mena, Stefano Gariazzo, Eleonora Di Valentino, Rafael C. Nunes, Gariazzo, Stefano, Nunes, Rafael da Costa   +11 more
core   +1 more source

A 5% measurement of the Hubble constant from Type II supernovae

, 2022
The most stringent local measurement of the Hubble-Lema\^itre constant from Cepheid-calibrated Type Ia supernovae (SNe~Ia) differs from the value inferred via the cosmic microwave background radiation ({\it Planck}$+\Lambda$CDM) by $\sim 5\sigma$.
B J Shappee, de Jaeger, T., Shappee, B. J., T de Jaeger, A G Riess, Zheng, W., Galbany, L., B E Stahl, Riess, A. G., Galbany, Lluís, Jeager, T. de, Stahl, B., A V Filippenko, W Zheng, Riess, Adam, Stahl, B. E., Filippenko, A. V., Shappee, Benjamin, Filippenko, Alexei V., L Galbany   +19 more
core   +1 more source

New H(z) Measurement at Redshift = 0.12 with DESI Data Release 1

The Astrophysical Journal
The Hubble parameter ( H ( z )) is a function of the redshift and a reliable measurement is very important to understand the expansion history of the Universe.
Ze-fan Wang, Lei Lei, Yi-zhong Fan
doaj   +1 more source

Redshift in Hubble's constant [PDF]

International Journal of Theoretical Physics, 1997
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources