Results 61 to 70 of about 35,594 (296)

Hadronic gamma-ray emission from windy microquasars [PDF]

, 2003
The jets of microquasars with high-mass stellar companions are exposed to the dense matter field of the stellar wind. We present estimates of the gamma-ray emission expected from the jet-wind hadronic interaction and we discuss the detectability of the ...
Aharonian, Aharonian, Aharonian, Anchordoqui, Atoyan, Bednarek, Bednarek, Butt, Corbel, D. F. Torres, Dar, Dermer, Distefano, Falcke, Falcke, G. E. Romero, Georganopoulos, Ghisellini, Hardee, I. F. Mirabel, Kaaret, Kaufman Bernadó, Kotani, Kotani, Levinson, M. M. Kaufman Bernadó, Maccarone, Markoff, Migliari, Mirabel, Mirabel, Paredes, Poutanen, Purmohammad, Romero, Romero, Torres   +36 more
core   +2 more sources

Oxide‐Free Titanium Coatings by Wire Arc Spraying in a Silane‐Doped Inert Atmosphere

Advanced Engineering Materials, EarlyView.
A silane‐doped argon atmosphere enables the production of oxide‐free titanium coatings via twin‐wire arc spraying at ambient pressure. This innovative approach eliminates residual oxygen, creating process conditions that prevent oxidation and nitride formation.
Manuel Rodriguez Diaz, Maik Szafarska, René Gustus, Kai Möhwald, Hans Jürgen Maier   +4 more
wiley   +1 more source

A Novel Method of Modeling Extended Emission of Compact Jets: Application to Swift J1727.8−1613

The Astrophysical Journal Letters
Flat radio spectra of compact jets launched by both supermassive and stellar-mass black holes (BHs) are explained by an interplay of self-absorbed synchrotron emission up to some distance along the jet and optically thin synchrotron at larger distances ...
Andrzej A. Zdziarski, Callan M. Wood, Francesco Carotenuto   +2 more
doaj   +1 more source

Measuring the ionisation fraction in a jet from a massive protostar

Nature Communications, 2019
The ionisation fraction of protostellar jets is key to establish their true energetics. Here, the authors determine it in a jet from a high-mass young stellar object, using multi-wavelengths observations, confirming that the ionising mechanism giving ...
R. Fedriani, A. Caratti o Garatti, S. J. D. Purser, A. Sanna, J. C. Tan, R. Garcia-Lopez, T. P. Ray, D. Coffey, B. Stecklum, M. Hoare   +9 more
doaj   +1 more source

A Jet Model for the Broadband Spectrum of the Seyfert-1 Galaxy NGC 4051 [PDF]

, 2011
Recent radio VLBI observations of the ~parsec-scale nuclear region of the narrow line Seyfert 1 galaxy NGC 4051 hint toward the presence of outflowing plasma.
Abdo, Ashley King, Bentz, Boller, Chartas, Christopoulou, Collinge, Côté, Dai, Denney, Dipankar Maitra, Done, Falcke, Falcke, Giroletti, Gültekin, Heavens, Ho, Ho, Hunt, Jon M. Miller, Kaspi, Kaspi, King, Maitra, Markoff, Markoff, Markoff, Mitsuda, Nowak, Peterson, Polko, Russell, Sera Markoff, Shakura, Sikora, Vlahakis, Wilson, Yusef-Zadeh   +38 more
core   +1 more source

Enhancing Strength and Electrical Conductivity in Al–Zr–Sc Conductor Alloys Through Sn and Sr Microalloying and Two‐Step Aging Treatment

Advanced Engineering Materials, EarlyView.
Trace additions of Sn and Sr combined with a two‐step aging treatment are shown to enhance the microstructure and performance of Al–Zr–Sc conductor alloys. Strength and electrical conductivity increase concurrently through accelerated precipitation of fine Al3(Sc, Zr) precipitates and improved dislocation resistance, offering a cost‐effective pathway ...
Quan Shao, Emad M. Elgallad, Alexandre Maltais, X.‐Grant Chen   +3 more
wiley   +1 more source

Stellar black holes: cosmic history and feedback at the dawn of the universe

, 2010
Significant historic cosmic evolution for the formation rate of stellar black holes is inferred from current theoretical models of the evolution of massive stars, the multiple observations of compact stellar remnants in the near and distant universe, and
I. Felix Mirabel, Le Floc'h, Meynet, Mirabel, Roberston, Romero   +5 more
core   +1 more source

Quasar induced galaxy formation: a new paradigm ? [PDF]

, 2009
We discuss observational evidence that quasars play a key role in the formation of galaxies starting from the detailed study of the quasar HE0450-2958 and extending the discussion to a series of converging evidence that radio jets may trigger galaxy ...
Alexander, Bahcall, Bahcall, Bahcall, Begelman, Bell, Bicknell, Bohlin, Brinchmann, Bundy, Calzetti, Canalizo, Chary, Comerford, Cowie, Crawford, Croft, Croton, Croton, D. Elbaz, D. Le Borgne, David, de Grijp, Dekel, Dey, Dey, Di Matteo, Di Matteo, Dickson, E. Pantin, Ebeling, Elbaz, Elvis, Fabian, Fanarof, Favata, Feain, Ferrarese, Ferrarese, Fioc, Fitzpatrick, Fragile, Fu, Fu, G. Letawe, Gebhardt, Genzel, Guzman, Haehnelt, Hasinger, Heavens, Hoffman, Hutchings, Hutchings, Jahnke, Juneau, K. Jahnke, Kennicutt, Kim, King, Klamer, Kodama, Kormendy, Letawe, Letawe, Letawe, Letawe, Li, Low, Maddox, Magain, Magain, Magorrian, Manka, Marconi, Matthews, McCarthy, McCarthy, McLeod, McLure, McLure, McLure, Merritt, Mikkola, Miley, Mirabel, Natarajan, Nesvadba, Nesvadba, Nesvadba, Netzer, Ocvirk, Ooosterloo, Panter, Papadopoulos, Papadopoulos, Pipino, Rees, Rejkuba, Richstone, Riechers, Riechers, Sage, Sandage, Sanders, Sanders, Schawinski, Shields, Silk, Silk, Stockton, Stockton, Stockton, Stockton, Stockton, Tadhunter, Thomas, Thompson, Treu, Van Breugel, Vilenkin, Wampler, Willmer, Willott, Willott, Woo, Zirm   +126 more
core   +3 more sources

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth, Tomáš Babinský, Jan Lars Riedel, Wen Hao Kan, Aijun Huang, Martin Heilmaier, Ivo Šulák   +6 more
wiley   +1 more source

Jets from black hole binaries and Galactic Nuclei

, 2000
Relativistic outflows are a common phenomenon in accreting black holes. Despite the enormous differences in scale, stellar-mass black holes in binaries and supermassive black holes in Galactic Nuclei produce jets with analogous properties.
Mirabel, I. F.
core   +1 more source