Results 141 to 150 of about 371,767 (221)

Sourcing the Kerr Geometry

Fortschritte der Physik, Volume 73, Issue 4, April 2025.
Abstract The Kerr metric is a vacuum solution of the Einstein equations outside of a rotating black hole (BH), but what interior matter is actually rotating and sourcing the Kerr geometry? Here, a rotating exotic matter is described, which can source the Kerr geometry for the entire acceptable range of its spin parameter and be shown to saturate the ...
Ram Brustein, A.J.M. Medved
wiley   +1 more source

Magnetic Reconnection in Space: An Introduction. [PDF]

Space Sci Rev
Burch JL, Nakamura R.
europepmc   +1 more source

Epistemic injustice and the “Nature of Science”

Journal of Research in Science Teaching, Volume 62, Issue 4, Page 901-941, April 2025.
Abstract Scientists and science educators have argued that learners (students, preservice teachers, and inservice teachers) should understand knowledge construction in science, in addition to figuring out disciplinary core ideas. Given this goal, some science education scholars created a construct called the “Nature of Science” (NOS), which aims to ...
David Stroupe, Enrique Suárez, Déana Scipio   +2 more
wiley   +1 more source

Astrophysics

Science, 1980
openaire   +3 more sources

Formation of free-floating planetary mass objects via circumstellar disk encounters. [PDF]

Sci Adv
Fu Z, Deng H, Lin DNC, Mayer L.
europepmc   +1 more source

Analysis of Paleointensity Results Under Different Interpretation Approaches: A Case Study on the Korkhi Volcanic Sequence (Lesser Caucasus, Georgia)

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 4, April 2025.
Abstract In this study we focus on the investigation of the absolute intensity records of two volcanic subsequences, aiming to enrich the global paleointensity database for the last 5 Ma, which currently shows important dispersion. We present new absolute paleointensities obtained from the Plio‐Pleistocene volcanic sequence of Korkhi (Djavakheti ...
Elisa M. Sánchez‐Moreno, Manuel Calvo‐Rathert, Avto Goguitchaichvili, George T. Vashakidze, Lisa Tauxe, Pierre Camps, Juan Morales‐Contreras, Vladimir A. Lebedev, Néstor Vegas, Nayeli Pérez‐Rodriguez, Ketino Gabarashvili   +10 more
wiley   +1 more source

Gravitational Hamiltonian Systems and the Retarded Gravity Inequality. [PDF]

Entropy (Basel)
Yahalom A.
europepmc   +1 more source

Water Vapor Spectroscopy and Thermodynamics Constrain Earth's Tropopause Temperature

AGU Advances, Volume 6, Issue 2, April 2025.
Abstract As Earth warms, the tropopause is expected to rise, but predictions of its temperature change are less certain. Longstanding theories employing “gray” radiation tie the tropopause temperature to outgoing longwave radiation (OLR), but this is in contrast to recent work in which simulations exhibit a Fixed Tropopause Temperature (FiTT) even as ...
Brett A. McKim, Nadir Jeevanjee, Geoffrey K. Vallis, Neil T. Lewis   +3 more
wiley   +1 more source

Using JADES NIRCam photometry to investigate the dependence of stellar mass inferences on the IMF in the early universe. [PDF]

Proc Natl Acad Sci U S A
Woodrum C, Rieke M, Ji Z, Baker WM, Bhatawdekar R, Bunker AJ, Charlot S, Curtis-Lake E, Eisenstein DJ, Hainline K, Hausen R, Helton JM, Hviding RE, Johnson BD, Robertson B, Sun F, Tacchella S, Whitler L, Williams CC, Willmer CNA.   +19 more
europepmc   +1 more source

Bridging Information From Paleo‐Hydrological and Climate Model Ensembles to Assess Long Term Hydrological Drought Hazard

AGU Advances, Volume 6, Issue 2, April 2025.
Abstract Characterizing the evolution of drought frequency and severity under anthropogenic global warming remains a key challenge because of the mismatch between the length of instrumental records and the long‐term variability of drought features.
Rui Guo, Hung T. T. Nguyen, Stefano Galelli, Serena Ceola, Alberto Montanari   +4 more
wiley   +1 more source