Results 151 to 160 of about 1,476 (186)

A Metric for the Entropic Purpose of a System. [PDF]

Entropy (Basel)
Parker MC, Jeynes C, Walker SD.
europepmc   +1 more source

Multiwavelength Observations of a Jet Launch in Real Time from the Post-changing-look Active Galaxy 1ES 1927+654

Sibasish Laha, Eileen T. Meyer, Dev R. Sadaula, Ritesh Ghosh, D. Sengupta, Megan Masterson, Onic I. Shuvo, M. Guainazzi, Cláudio Ricci, Mitchell C. Begelman, Alexander Philippov, Rostom Mbarek, Amelia Hankla, Erin Kara, F. Panessa, Ehud Behar, H. C. Zhang, Fabio Pacucci, Main Pal, F. Ricci, Ilaria Villani, S. Bisogni, F. La Franca, S. Bianchi, G. Bruni, S. R. Oates, ChangHoon Hahn, M. Nicholl, S. B. Cenko, Sabyasachi Chattopadhyay, J. Becerra González, J. A. Acosta‐Pulido, Suvendu Rakshit, Jiří Svoboda, Luigi Gallo, Adam Ingram, Darshan Kakkad   +36 more
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Modeling Cosmological Evolution of Jetted Seyfert Galaxies for z  ≲ 10

Julianne Goddard, Isaac Shlosman, Emilio Romano-Díaz   +2 more
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Synthesis of Phenanthrene/Pyrene Hybrid Microparticles: Useful Synthetic Mimics for Polycyclic Aromatic Hydrocarbon-Based Cosmic Dust. [PDF]

J Am Chem Soc
Brotherton EE, Chan DHH, Armes SP, Janani R, Sammon C, Wills JL, Tandy JD, Burchell MJ, Wozniakiewicz PJ, Alesbrook LS, Tabata M.   +10 more
europepmc   +1 more source

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Jets in Active Galaxies

Resonance, 2018
Jets in active galaxies are signatures of energy supply via collimated beams of plasma from the galactic nucleus to the extended regions of emission. These jets, which occur across the electromagnetic spectrum, are powered by supermassive black holes in the centres of the host galaxies.
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Some new ultraviolet galaxies with jets

Astrophysics, 1985
On the basis of observations with the 2.6-m telescope at the Byurakan Observatory and the 6 m telescope at the Special Astrophysical Observatory, a morphological study has been made of four UV galaxies with jets, namely, Markaryan 423, 739, 773, and 984. Their parameters have been estimated.
A. R. Petrosyan, K. A. Saakyan, �. E. Khachikyan   +2 more
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Radio galaxies and jets

2008
We review the physics of radio galaxies and their jets.
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Are There Jets in Spiral Galaxies?

1983
The absence in spiral galaxies of large-scale collimated jets of radio emission is still little understood. Collimated emission in elliptical galaxies in some cases exceeds by far the optical extent of the galaxy (e.g. in NGC6251). Westerbork observations of NGC4258 (van der Kruit, Oort and Mathewson, 1972) and NGC3079 (de Bruyn, 1977) have provided ...
C. Kotanyi, E. Hummel, J. van Gorkom
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Relativistic jets in our galaxy

Jets from stellar-mass black holes and neutron stars in X-ray binary systems are the most relativistic flows in our galaxy, are possible sites for high energy cosmic ray and neutrino production, energise and distort the interstellar medium and allow us to understand the life cycles of jets from supermassive black holes on humanly accessible timescales.
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Classification of Optical Jets in Galaxies

1986
New, deep images of galaxies reported in various catalogs to have optical jets show that most are not jets, but tidal features, polar rings, or superpositions. From those objects that do seem to represent nuclear ejecta, criteria of brightness relative to the parent galaxy, width, and location have been derived, which should produce much purer samples ...
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