Results 61 to 70 of about 72,254 (220)

Warm gas accretion onto the Galaxy [PDF]

Proceedings of the International Astronomical Union, 2008
AbstractWe present evidence that the accretion of warm gas onto the Galaxy today is at least as important as cold gas accretion. For more than a decade, the source of the bright Hα emission (up to 750 mR†) along the Magellanic Stream has remained a mystery.
openaire   +2 more sources

JWST Spectroscopic View of a Rapidly Growing, Dust-obscured Quasar at z ∼ 4: Effect of Dust Extinction Correction on Black Hole Mass and Eddington Ratio Estimation

The Astrophysical Journal
In the merger-driven galaxy evolution scenario, the central supermassive black holes (SMBHs) in dust-obscured galaxies grow rapidly. Interestingly, a recent work on a dust-obscured galaxy, LID-568 at z = 3.965, has shown that its SMBH is growing ...
Dohyeong Kim, Myungshin Im
doaj   +1 more source

Probing the Physics of Narrow Line Regions in Active Galaxies III: Accretion and Cocoon Shocks in the LINER NGC1052

, 2015
We present Wide Field Spectrograph (WiFeS) integral field spectroscopy and HST FOS spectroscopy for the LINER galaxy NGC 1052. We infer the presence of a turbulent accretion flow forming a small-scale accretion disk.
Banfield, Julie, Bhatt, Harish, Davies, Rebecca, Dopita, Michael A., Dressell, Linda L., Hampton, Elise, Ho, I-Ting, James, Bethan, Jin, Chichuan, Jose, Jessy, Juneau, Stéphanie, Kewley, Lisa, Kharb, Preeti, Ramya, S., Scharwächter, Julia, Shastri, Prajval, Srivastava, Shweta, Sutherland, Ralph, Zaw, Ingyin   +18 more
core   +3 more sources

Survey on AI‐Enabled Computer Vision Technologies and Applications for Space Robotic Missions

Journal of Field Robotics, EarlyView.
ABSTRACT This survey provides a comprehensive overview of recent advancements and challenges in Artificial Intelligence (AI)‐enabled computer vision (CV) techniques for space robotic missions, spanning critical phases such as Entry, Descent, and Landing (EDL), orbital operations, and planetary surface exploration.
Maciej Quoos, Steven Kay, Julia Wajoras, Robert Field, Evridiki V. Ntagiou, Fakher Mohammad, Yang Gao   +6 more
wiley   +1 more source

Diverse Pathways for Supermassive Black Hole–Galaxy Coevolution

The Astrophysical Journal
Supermassive black holes (SMBHs) are observed in diverse galaxy populations across cosmic time, yet a clear understanding of how they coevolve with their hosts has not been reached.
Bryan A. Terrazas, James Aird, Alison L. Coil   +2 more
doaj   +1 more source

Accretion and Outflow in Active Galaxies [PDF]

Proceedings of the International Astronomical Union, 2009
AbstractI review accretion and outflow in active galactic nuclei. Accreti4on appears to occur in a series of very small-scale, chaotic events, whose gas flows have no correlation with the large-scale structure of the galaxy or with each other. The accreting gas has extremely low specific angular momentum and probably represents only a small fraction of
openaire   +2 more sources

Mind and Cosmos as Throughput Systems: A Convergence Through the Throughput Model

Systems Research and Behavioral Science, EarlyView.
ABSTRACT This paper advances a conceptual and mathematical foundations approach by applying the throughput model (TPM) to cosmic phenomena, reframing the universe as an extended information processing system. TPM's four stages, Perception, Information, Judgement and Decision Choice, are reformulated in explicit information‐theoretic and dynamical ...
Waymond Rodgers
wiley   +1 more source

The origin of polar ring galaxies: evidence for galaxy formation by cold accretion

, 2005
Polar ring galaxies are flattened stellar systems with an extended ring of gas and stars rotating in a plane almost perpendicular to the central galaxy.
Andrea V. Macciò, Ben Moore, Combes F., Gerhard O. E., Joachim Stadel, Merrifield M. R., Reshetnikov V. P., Reshetnikov V. P., Sersic J. L., Sparke L. S.   +9 more
core   +1 more source

Clues on black hole feedback from simulated and observed X-ray properties of elliptical galaxies [PDF]

, 2009
The centers of elliptical galaxies host supermassive black holes that significantly affect the surrounding interstellar medium through feedback resulting from the accretion process.
Blandford, Chartas, Ciotti, Ciotti, Crenshaw, David, Di Matteo, Di Matteo, Diehl, Diehl, Fabian, Ferrarese, Fukazawa, Gallo, Gebhardt, Ho, Hopkins, J.P. Ostriker, Kim, L. Ciotti, Loewenstein, Machacek, Mahadevan, Mathews, Merloni, Narayan, O’Sullivan, O’Sullivan, O’Sullivan, Pellegrini, Pellegrini, Pellegrini, Pellegrini, Pellegrini, Peterson, Proga, S. Pellegrini, Sazonov, Soria, Trinchieri, Vedder   +40 more
core   +1 more source

Diving Deeper Into Mechanisms of Acrylamide‐Induced Toxicity: RNA Sequencing Reveals Transcriptomic Alteration and Retrotransposon Expression in Drosophila melanogaster

Environmental Toxicology, EarlyView.
ABSTRACT Given the inevitability of human and animal exposure to acrylamide, there is increasing concern regarding its potential health risks. While a number of molecular mechanisms have been proposed, the complexity of acrylamide toxicological pathways and interactions remains incompletely characterized.
Oluwabukola Mary Farodoye, Titilayomi Ayomide Otenaike, Daniela Moreira Mombach, Monica Medeiros Silva, Amos Olalekan Abolaji, Elgion Lucio Da Silva Loreto   +5 more
wiley   +1 more source