Results 71 to 80 of about 21,702 (168)

A Comprehensive Framework for Assessing Terrestrial Analogue Field Sites for Ocean Worlds

Journal of Geophysical Research: Planets, Volume 130, Issue 9, September 2025.
Abstract Field studies at terrestrial analogue sites represent an important contribution to the science of ocean worlds. The value of the science and technology investigations conducted at field analogue sites depends on the relevance of the analogue environment to the target ocean world.
Jennifer C. Stern, Heather V. Graham, Bradley Burcar, Emily S. Martin, Aaron Noell, Kevin Hand, Jeff S. Bowman, Peter Doran, Virginia Edgcomb, James F. Holden, Alta E. G. Howells, Michael J. Malaska, Brook L. Nunn, Jani Radebaugh, Laura E. Rodriguez, Schuyler Borges, Dina Bower, Samuel Courville, Melisa Diaz, Benjamin Hockman, Julie Huber, Justin Lawrence, Trista Vick‐Majors, Conor A. Nixon, John R. Spear, Amanda V. Steckel, Anezina Solomonidou, Nicholas Schmerr, Britney Schmidt, Matthew O. Schrenk, Lauren Seyler, Amy R. Smith, Catherine C. Walker, Patrick Whelley, Natalie Wolfenbarger, Steven D. Vance   +35 more
wiley   +1 more source

Scalar-tensor cosmology at the general relativity limit: Jordan vs Einstein frame

, 2008
We consider the correspondence between the Jordan frame and the Einstein frame descriptions of scalar-tensor theory of gravitation. We argue that since the redefinition of the scalar field is not differentiable at the limit of general relativity the ...
C. M. Will, Laur Järv, M. Fierz, Margus Saal, P. Jordan, Piret Kuusk, S. Weinberg, V. Faraoni, V. Faraoni, Y. Fujii   +9 more
core   +1 more source

A Time‐Dependent Model of the Vibrational Distribution of Nitrogen Molecules: New Rate Data Sets and Self‐Consistent Coupling With Auroral and Ionospheric Electrons

Journal of Geophysical Research: Space Physics, Volume 130, Issue 9, September 2025.
Abstract Vibrationally excited nitrogen molecules (N2) play an important role in the chemistry and dynamics of Earth's atmosphere. Electron impact, whether it originates from auroral precipitation or ionospheric thermal electrons, is among the major causes of the vibrational excitation of N2.
Jun Liang, J.‐P. St‐Maurice, E. Donovan   +2 more
wiley   +1 more source

A simultaneous study of dark matter and phase transition: two-scalar scenario

Journal of High Energy Physics, 2019
The simplest extension of the Standard Model by only one real singlet scalar can explain the observed dark matter relic density while giving simultaneously a strongly first-order electroweak phase transition in the early universe. However, after imposing
Karim Ghorbani, Parsa Hossein Ghorbani
doaj   +1 more source

Consequences of f(R)-theories of gravity on gravitational leptogenesis

, 2012
f(R)-theories of gravity are reviewed in the framework of the matter-antimatter asymmetry in the Universe. The asymmetry is generated by the gravitational coupling of heavy (Majorana) neutrinos with the Ricci scalar curvature. In order that the mechanism
Lambiase, G., Mohanty, S., Pizza, L.
core   +1 more source

Rock Coatings as Evidence for Late Surface Alteration on the Floor of Jezero Crater, Mars

Journal of Geophysical Research: Planets, Volume 130, Issue 9, September 2025.
Abstract During the NASA Perseverance rover's exploration of the Jezero crater floor, coatings were commonly observed on rocks. These features may record past water‐rock‐atmosphere interactions on the crater floor, and understanding their origin is important for constraining the timing of potential water activity and habitability at Jezero.
Bradley J. Garczynski, Briony H. N. Horgan, Jeffrey R. Johnson, Melissa S. Rice, Lucia Mandon, Baptiste Chide, Andreas Bechtold, Pierre Beck, James F. Bell III, Erwin Dehouck, Alberto G. Fairén, Felipe Gómez, Pierre‐Yves Meslin, Gerhard Paar, Mark A. Sephton, Justin I. Simon, Christoph Traxler, Alicia Vaughan, Roger C. Wiens, Tanguy Bertrand, Olivier Beyssac, Adrian J. Brown, Emily L. Cardarelli, Edward A. Cloutis, Louise Duflot, David T. Flannery, Patrick Gasda, Alexander G. Hayes, Christopher D. K. Herd, Linda Kah, Kjartan B. Kinch, Nina Lanza, Marco Merusi, Chase C. Million, Jorge I. Núñez, Ann M. Ollila, Clément Royer, Michael St. Clair, Christian Tate, Anastasia Yanchilina   +39 more
wiley   +1 more source

Light dark Higgs boson in minimal sub-GeV dark matter scenarios

Journal of High Energy Physics, 2018
Minimal scenarios with light (sub-GeV) dark matter whose relic density is obtained from thermal freeze-out must include new light mediators. In particular, a very well-motivated case is that of a new “dark” massive vector gauge boson mediator.
Luc Darmé, Soumya Rao, Leszek Roszkowski   +2 more
doaj   +1 more source

Predictions for axion couplings from ALP cogenesis

Journal of High Energy Physics, 2021
Adding an axion-like particle (ALP) to the Standard Model, with a field velocity in the early universe, simultaneously explains the observed baryon and dark matter densities.
Raymond T. Co, Lawrence J. Hall, Keisuke Harigaya   +2 more
doaj   +1 more source

Feasibility of in situ K‐Ar isochron dating on Mars: Assessment using the mineralogy of Martian meteorites

Meteoritics &Planetary Science, Volume 60, Issue 9, Page 2076-2098, September 2025.
Abstract Dating rocks with a 2σ precision of 200 Ma is required to understand the history of Martian habitability and volcanic activity since ~4000 Ma. In situ K‐Ar dating using a spot‐by‐spot laser ablation technique has been developed for isochron dating on Mars.
Hikaru Hyuga, Yuichiro Cho, Yayoi N. Miura, Takashi Mikouchi, Seiji Sugita   +4 more
wiley   +1 more source

Multipartite dark matter with scalars, fermions and signatures at LHC

Journal of High Energy Physics, 2019
Basic idea of this analysis is to achieve a two-component dark matter (DM) framework composed of a scalar and a fermion, with non-negligible DM-DM interaction contributing to thermal freeze out (hence relic density), but hiding them from direct detection
Subhaditya Bhattacharya, Purusottam Ghosh, Narendra Sahu   +2 more
doaj   +1 more source