Results 81 to 90 of about 20,356 (164)

Collection and In Situ Analyses of Regolith Samples by the Mars 2020 Rover: Implications for Their Formation and Alteration History

Journal of Geophysical Research: Planets, Volume 130, Issue 2, February 2025.
Abstract The Perseverance rover has sampled mm‐size lithic fragments containing olivine likely from at least two source regions from the surface of an inactive megaripple surface, and fine‐grained material from the surface and to a depth of ∼4–6 cm. Some of the mm‐size grains lack a coherent diffraction pattern measured by PIXL, consistent with the ...
E. M. Hausrath, R. Sullivan, Y. Goreva, M. P. Zorzano, A. Vaughan, A. Cousin, S. Siljeström, S. Sharma, A. O. Shumway, T. Kizovski, S. J. VanBommel, M. Tice, A. Knight, G. Martinez, A. Vicente‐Retortillo, L. Mandon, C. T. Adcock, J. M. Madariaga, I. Población, J. R. Johnson, J. Lasue, O. Gasnault, N. Randazzo, E. L. Cardarelli, R. Kronyak, A. Bechtold, G. Paar, A. Udry, O. Forni, C. C. Bedford, N. A. Carman, J. F. Bell III, K. Benison, T. Bosak, A. Brown, A. Broz, F. Calef, B. C. Clark, E. Cloutis, A. D. Czaja, T. Fornaro, T. Fouchet, M. Golombek, F. Gómez, C. D. K. Herd, K. Herkenhoff, R. S. Jakubek, L. Jandura, J. Martinez‐Frias, L. E. Mayhew, P.‐Y. Meslin, C. E. Newman, J. I. Núñez, F. Poulet, C. Royer, P. Russell, M. A. Sephton, S. K. Sharma, D. Shuster, J. I. Simon, I. Tirona, R. C. Wiens, B. P. Weiss, A. J. Williams, K. Williford, Z. U. Wolf, the Regolith Working Group   +66 more
wiley   +1 more source

Evolution of Plume Volcanism at Atla Regio, Venus

Journal of Geophysical Research: Planets, Volume 130, Issue 2, February 2025.
Abstract Atla Regio is a large topographic rise, at the equator of Venus, considered to sit above a young mantle upwelling. Hosting several giant shield volcanoes, including Maat Mons, it is a strong candidate for recent eruptive activity. Through detailed analysis of material units and structures at Ozza, Maat and Sapas Mons, northern Dali Chasma and ...
P. J. Mason, A. Klidaras, D. Cirium, R. C. Ghail, S. Lea‐Wurzbach   +4 more
wiley   +1 more source

A systematic study of hidden sector dark matter: application to the gamma-ray and antiproton excesses

Journal of High Energy Physics, 2020
In hidden sector models, dark matter does not directly couple to the particle content of the Standard Model, strongly suppressing rates at direct detection experiments, while still allowing for large signals from annihilation.
Dan Hooper, Rebecca K. Leane, Yu-Dai Tsai, Shalma Wegsman, Samuel J. Witte   +4 more
doaj   +1 more source

A multidisciplinary overview on the Tupi‐speaking people expansion

American Journal of Biological Anthropology, Volume 186, Issue 1, January 2025.
Expansion of Tupi linguistic subfamilies. Abstract The cultural and biological diversity of South American indigenous groups represent extremes of human variability, exhibiting one of the highest linguistic diversities alongside a remarkably low within‐population genetic variation and an extremely high inter‐population genetic differentiation.
Marcos Araújo Castro e Silva, Tábita Hünemeier   +1 more
wiley   +1 more source

Complementarity of the CERN Large Hadron Collider and the $e^+e^-$ International Linear Collider

, 2008
The next-generation high-energy facilities, the CERN Large Hadron Collider (LHC) and the prospective $e^+e^-$ International Linear Collider (ILC), are expected to unravel new structures of matter and forces from the electroweak scale to the TeV scale. In
A. Alves, A. Bartl, A. Datta, A. Djouadi, A. Freitas, A. Freitas, A. Freitas, A. Freitas, A. Freitas, A.J. Barr, B.K. Gjelsten, B.K. Gjelsten, C. Amsler, C. Athanasiou, C. Giunti, C.P. Buszello, D.J. Miller, D.J.H. Chung, E. Accomando, E. Boos, E.A. Baltz, F. Deppisch, G. Weiglein, G.A. Blair, G.A. Moortgat-Pick, G.F. Giudice, G.L. Kane, H. Murayama, H. Pagels, H.U. Martyn, J.A. Aguilar-Saavedra, J.A. Aguilar-Saavedra, J.I. Kamoshita, J.L. Feng, J.L. Feng, J.L. Feng, J.R. Ellis, J.R. Ellis, J.R. Ellis, J.R. Ellis, J.R. Ellis, J.R. Espinosa, J.R. Espinosa, K. Desch, K. Hamaguchi, K. Inoue, K. Inoue, L. Alvarez-Gaume, L.E. Ibanez, L.E. Ibanez, M. Battaglia, M. Bolz, M. Duhrssen, M. Fukugita, M. Misiak, M.M. Muhlleitner, M.M. Nojiri, M.R. Buckley, M.S. Carena, M.S. Carena, M.S. Carena, M.Y. Khlopov, N. Arkani-Hamed, N. Arkani-Hamed, P. Bechtle, P. Bechtle, P. Langacker, R. Barbier, R. Dermisek, R.M. Barnett, S. Heinemeyer, S. Heinemeyer, S. Kraml, S. Schael, S. Y. Choi, S.F. King, S.Y. Choi, S.Y. Choi, S.Y. Choi, S.Y. Choi, S.Y. Choi, S.Y. Choi, S.Y. Choi, S.Y. Choi, T. Becher, U. Amaldi, U. Ellwanger, U. Ellwanger, U. Ellwanger, V. Barger, W. Buchmuller, W. Buchmuller, W. Kilian, W.Y. Keung   +93 more
core   +2 more sources

Solar Semidiurnal Variations in the Thermosphere and Ionosphere Forced From Above and From Below

Journal of Geophysical Research: Space Physics, Volume 130, Issue 1, January 2025.
Abstract The nature and origins of solar‐synchronous semidiurnal variations (SW2) in the thermosphere and ionosphere are explored through analysis of Thermosphere Ionosphere Electrodynamics General Circulation Model (TIEGCM) simulations that include and exclude forcing by tides at its 97‐km lower boundary derived from Ionospheric Connection (ICON ...
Jeffrey M. Forbes, Xiaoli Zhang, Chihoko Cullens, Astrid Maute   +3 more
wiley   +1 more source

Unveiling the Dynamics of the Universe

, 2016
We explore the dynamics and evolution of the Universe at early and late times, focusing on both dark energy and extended gravity models and their astrophysical and cosmological consequences.
Avelino, Pedro, Barreiro, Tiago, Carvalho, C. Sofia, da Silva, Antonio, Lobo, Francisco S. N., Martin-Moruno, Prado, Mimoso, Jose Pedro, Nunes, Nelson J., Rubiera-Garcia, Diego, Saez-Gomez, Diego, Sousa, Lara, Tereno, Ismael, Trindade, Arlindo   +12 more
core   +2 more sources

Non-perturbative reheating and Nnaturalness

Journal of High Energy Physics, 2017
We study models in which reheating happens only through non-perturbative processes. The energy transferred can be exponentially suppressed unless the inflaton is coupled to a particle with a parametrically small mass. Additionally, in some models a light
Edward Hardy
doaj   +1 more source

QCD axion dark matter from a late time phase transition

Journal of High Energy Physics, 2020
We investigate the possibility that the Peccei-Quinn phase transition occurs at a temperature far below the symmetry breaking scale. Low phase transition temperatures are typical in supersymmetric theories, where symmetry breaking fields have small ...
Keisuke Harigaya, Jacob M. Leedom
doaj   +1 more source

Holography and Brane-bulk Energy Exchange

, 2005
The five-dimensional description of generalized Randall-Sundrum cosmology is mapped via holography to a generalization of the Starobinsky model. This provides a holographic dual description of the cosmological brane-bulk energy exchange processes studied
Alexander S H S, Apostolopoulos P S, Apostolopoulos P S Brouzakis N Saridakis E N Tetradis N, Arkani-Hamed N, Banks T Douglas M R Horowitz G T Martinec E J, Bianchi M, Bianchi M, Birrell N D, Brandhuber A, Brax P, Brax P van de Bruck C Davis A C, Burgess C P, Charmousis C, Csaki C, Danielsson U H, Das S R, de Haro S, Duff M J, Dvali G R Shafi Q Solganik S, Elias Kiritsis, Fefferman C, Freedman D Z, Gabadadze G, Gregory J P, Henningson M, Kehagias A, Kiritsis E, Kiritsis E, Kiritsis E, Kiritsis E, Kiritsis E, Klebanov I R, Kraus P, Leeper E, Maartens R, Maldacena J, Maldacena J M, Nojiri S, Papadimitriou I, Papadimitriou I Skenderis K, Quevedo F, Silverstein E, Sundrum R, Tetradis N, Tomaras T N, Trodden M Carroll S M, Verlinde H, Witten E, Witten E, Zee A, ’t Hooft G   +50 more
core   +2 more sources