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The high energy X-ray probe (HEX-P): science overview

Frontiers in Astronomy and Space Sciences
To answer NASA’s call for a sensitive X-ray observatory in the 2030s, we present the High Energy X-ray Probe (HEX-P) mission concept. HEX-P is designed to provide the required capabilities to explore current scientific questions and make new discoveries ...
Javier A. García, Javier A. García, Daniel Stern, Kristin Madsen, Miles Smith, Brian Grefenstette, Marco Ajello, Jason Alford, Adlyka Annuar, Matteo Bachetti, Mislav Baloković, Mislav Baloković, Ricarda S. Beckmann, Stefano Bianchi, Daniela Biccari, Peter Boorman, Murray Brightman, Johannes Buchner, Esra Bulbul, Chien-Ting Chen, Chien-Ting Chen, Francesca Civano, Joel Coley, Joel Coley, Joel Coley, Riley M. T. Connors, Melania Del Santo, Laura Di Gesu, Paul A. Draghis, Paul A. Draghis, P. Chris Fragile, Andrés Gúrpide, Manuele Gangi, Suvi Gezari, Fiona Harrison, Elias Kammoun, Elias Kammoun, Elias Kammoun, Giorgio Lanzuisi, Bret Lehmer, Anne Lohfink, Renee Ludlam, Stefano Marchesi, Stefano Marchesi, Lea Marcotulli, Lea Marcotulli, Raffaella Margutti, Megan Masterson, Andrea Merloni, Matthew Middleton, Kaya Mori, Alberto Moretti, Kirpal Nandra, Kerstin Perez, Ryan W. Pfeifle, Ryan W. Pfeifle, Ciro Pinto, Joanna Piotrowska, Gabriele Ponti, Katja Pottschmidt, Katja Pottschmidt, Peter Predehl, Simonetta Puccetti, Arne Rau, Stephen Reynolds, Andrea Santangelo, Daniele Spiga, John A. Tomsick, Núria Torres-Albà, Dominic J. Walton, Daniel Wilkins, Joern Wilms, Will Zhang, Xiurui Zhao, Xiurui Zhao   +74 more
doaj   +1 more source

Variable G versus the Accelerated Expansion of the Universe

Open Astronomy, 2017
It is shown that the hypothesis of permitting variability of the Newtonian constant G, increasing with the local density of dark matter, implies that there is no need for the introduction of a cosmological constant or accelerated expansion of the ...
Colenbrander Bernard G., Hulscher Willem S.   +1 more
doaj   +1 more source

Assessing the Performance of the Phase Difference Bathymetric Sonar Depth Uncertainty Prediction Model

Remote Sensing, 2022
Realistic predictions of the contribution of the uncertainty sources affecting the quality of the bathymetric measurements prior to a survey is of importance. To this end, models predicting these contributions have been developed.
Tannaz H. Mohammadloo, Matt Geen, Jitendra S. Sewada, Mirjam Snellen, Dick G. Simons   +4 more
doaj   +1 more source

Aluminum versus Gallium: Differences in Bis(bis(trimethylsilyl)methyl) Element Halides, Hydrides, and Oxygen‐Bridged E/P Frustrated Lewis Pairs

ChemistryEurope, EarlyView.
Reacting Bis2GaBr (Bis = CH(SiMe3)2) with Bis2AlH selectively yields Bis2GaH, a monomeric hydride in solution, characterized by diffusion ordered spectroscopy NMR, infrared spectroscopy and indirectly via hydrogallation. A one‐pot route enables frustrated Lewis pairs Bis2EOPtBu2 (E = Al, Ga), with the gallium analog splitting H2 and showing a dynamic ...
Julian Buth, Maximilian J. Klingsiek, Yury V. Vishnevskiy, Andreas Mix, Jan-Hendrik Lamm, Beate Neumann, Hans-Georg Stammler, Norbert Werner Mitzel   +7 more
wiley   +1 more source

Magnetic Globe Lithograph [PDF]

, 2004
This activity demonstrates what a dipole magnetic field looks like in 3D. It was developed because the commonly used classroom demo (iron filings on a sheet of paper on top of a bar magnet) leads to student misconception that magnetic fields are two ...

core  

Progenitors of Recombining Supernova Remnants

, 2012
Usual supernova remnants have either ionizing plasma or plasma in collisional ionization equilibrium, i.e., the ionization temperature is lower than or equal to the electron temperature.
Blinnikov, Chevalier, Dwarkadas, Dwarkadas, Fryer, Hachisu, Hachisu, Itoh, Kawasaki, Moriya, Neill, Ohnishi, Ozawa, Pakmor, Prieto, Sawada, Schlegel, Shimizu, Smith, Smith, Uno, Wellons, Yamaguchi   +22 more
core   +1 more source

Supernova Cooling in a Dark Matter Smog [PDF]

, 2014
A light hidden gauge boson with kinetic mixing with the usual photon is a popular setup in theories of dark matter. The supernova cooling via radiating the hidden boson is known to put an important constraint on the mixing.
Zhang, Yue
core   +3 more sources

Observational data on Galactic supernova remnants III: The supernova remnants within l = 270°-360° [PDF]

Serbian Astronomical Journal, 2004
We have collected all the available data of Galactic supernova remnants given in the literature. The data of Galactic supernova remnants located in the Galactic longitude interval l=270°-360°in all the spectral bands are represented in this work. We have
Guseinov O.H., Ankay A., Tagieva S.O.
doaj   +1 more source

Establishing Indium in Frustrated Lewis Pair Chemistry: From Synthesis to Catalytic Applications

ChemistryEurope, EarlyView.
Not that hard: The effects of chemical hardness of the soft FLP tBu2InCH2PtBu2 and its pyridine‐adduct tBu2In(py)CH2PtBu2 were examined in adduct formation reactions toward H2, CO2, and CS2. The frustrated Lewis pair shows catalytic activity in the reduction of CO2 with pinacolborane.
Daniel N. Heuer, Jan‐Hendrik Lamm, Hans‐Georg Stammler, Beate Neumann, Andreas Mix, Yury V. Vishnevskiy, Norbert W. Mitzel   +6 more
wiley   +1 more source

Determining the Supernova Direction by its Neutrinos

, 2002
Supernova neutrinos, which arrive at Earth earlier than light, allow for the earliest determination of the direction of the supernova. The topic of this paper is to study how accurately we can determine the supernova direction.
K. Sato, LOSECCO, S. Ando
core   +1 more source