Results 131 to 140 of about 92,607 (277)

A Hydrodynamical Simulations-based Model that Connects the FRB DM–Redshift Relation to Suppression of the Matter Power Spectrum via Feedback

The Astrophysical Journal
Understanding the impact of baryonic feedback on the small-scale ( k  ≳ 1 h Mpc ^−1 ) matter power spectrum is a key astrophysical challenge, and essential for interpreting data from upcoming weak-lensing surveys, which require percent-level accuracy to ...
Kritti Sharma, Elisabeth Krause, Vikram Ravi, Robert Reischke, Pranjal R. S., Liam Connor   +5 more
doaj   +1 more source

Physics of Primordial Universe

, 2003
The physical basis of the modern cosmological inflationary models with baryosynthesis and nonbaryonic dark matter and energy implies such predictions of particle theory, that, in turn, apply to cosmology for their test. It makes physics of early Universe
Khlopov, Maxim Yu.
core   +2 more sources

Static recrystallization of shocked calcite in Ries impact breccias

Meteoritics &Planetary Science, EarlyView.
Abstract Calcite is prone to chemical and microstructural modifications, especially after having been strained at high stresses and strain rates, as during hypervelocity impact events. These modifications include precipitation from pore fluid as well as replacement of strained volumes by recrystallization. In calcite aggregates of a metagranite breccia
Claudia A. Trepmann, Fabian Dellefant, Lina Seybold, Wolfgang W. Schmahl, Elena Sturm, Daniel Weidendorfer, Sandro Jahn, Iuliia V. Sleptsova, Stuart A. Gilder   +8 more
wiley   +1 more source

Age of Massive Galaxies at Redshift 8

The Astrophysical Journal
Recent James Webb Space Telescope data analyses have shown that massive red galaxies existed at redshifts z ≳ 6, a discovery that is difficult to understand in the context of standard cosmology (ΛCDM).
M. López-Corredoira, F. Melia, J.-J. Wei, C.-Y. Gao   +3 more
doaj   +1 more source

Microspherules Formed by Lightning Strikes

Meteoritics &Planetary Science, EarlyView.
Abstract Natural microspherules are formed by high‐temperature processes and are present throughout the geologic record to the present day. We report the discovery of large numbers of microspherules recovered from a rock pavement in the Pilbara region, Western Australia.
M. R. Boyd, M. J. Genge, A. G. Tomkins
wiley   +1 more source

Probing Baryonic Feedback and Cosmology with the 3 × 2-point Statistic of Fast Radio Bursts and Galaxies

The Astrophysical Journal
The impact of galaxy formation processes on the matter power spectrum is uncertain. Fast radio bursts (FRBs), through their dispersion measures (DMs) encoding the integrated baryon density, offer a unique window into gas distribution.
Kritti Sharma, Elisabeth Krause, Vikram Ravi, Robert Reischke, Liam Connor, Pranjal R. S., Dhayaa Anbajagane   +6 more
doaj   +1 more source

Algebraic Observational Cosmology

What can be measured by an observer in our universe? We address this question by constructing an algebra of gravitationally-dressed observables accessible to a comoving observer in FLRW spacetimes that are asymptotically de Sitter in the past, describing an inflationary epoch.
Kudler-Flam, Jonah, Leutheusser, Samuel, Satishchandran, Gautam   +2 more
openaire   +2 more sources

Confirmation of the impact origin of the Late Ordovician Tvären impact structure (southeast Sweden) and emplacement of impactites in a marine setting

Meteoritics &Planetary Science, EarlyView.
Abstract The Tvären structure in southeastern Sweden has been listed as a confirmed marine‐target impact structure for decades. However, to date, no measurements and/or indexed data of planar deformation features in quartz grains from the structure have been published or any other unequivocal evidence of impact.
Katarzyna J. Gajewska, Sanna Alwmark, Mikael Calner, Sylvain Richoz, Jens Ormö, Erik Sturkell, Carl Alwmark   +6 more
wiley   +1 more source

Dimensional Reduction for Sampled Priors and Application to Photometric Redshift Distributions

The Astrophysical Journal
A typical Bayesian inference on the values of some parameters of interest q from some data D involves running a Markov Chain (MC) to sample from the posterior $p({\boldsymbol{q}},{\boldsymbol{n}}| D)\propto { \mathcal L }(D| {\boldsymbol{q}},{\boldsymbol{
G. M. Bernstein, W. d’Assignies, M. A. Troxel, A. Alarcon, A. Amon, G. Giannini, B. Yin, M. Aguena, S. S. Allam, F. Andrade-Oliveira, D. Brooks, A. Carnero Rosell, J. Carretero, L. N. da Costa, M. E. S. Pereira, J. De Vicente, S. Everett, J. Frieman, J. García-Bellido, D. Gruen, S. R. Hinton, D. L. Hollowood, K. Honscheid, D. J. James, S. Lee, J. L. Marshall, J. Mena-Fernández, R. Miquel, A. A. Plazas Malagón, E. Sanchez, D. Sanchez Cid, I. Sevilla-Noarbe, T. Shin, M. Smith, E. Suchyta, M. E. C. Swanson, N. Weaverdyck, J. Weller, P. Wiseman, (DES Collaboration)   +39 more
doaj   +1 more source

Ryugu Reference Project: Recommendations from the Measurement Definition Team

Meteoritics &Planetary Science, EarlyView.
Abstract Sample return missions play a significant role in planetary science by providing pristine extraterrestrial materials. JAXA's Hayabusa2 and NASA's OSIRIS‐REx missions have returned samples from the C‐type asteroids Ryugu and Bennu, respectively. The chemical and mineralogical compositions of these samples closely resemble those of CI chondrites,
Tetsuya Yokoyama, Guillaume Avice, Henner Busemann, Nicolas Dauphas, Daniel P. Glavin, Ashley J. King, Thorsten Kleine, Katharina Lodders, Frederic Moynier, Maria Schönbächler, Yoshinori Takano, Kun Wang, Hikaru Yabuta, Yuma Enokido, Ryota Fukai, Shogo Tachibana, Tomohiro Usui   +16 more
wiley   +1 more source