Results 71 to 80 of about 35,527 (304)

Interaction Of A Stellar Magnetic Field With A Turbulent Accretion Disk [PDF]

International Astronomical Union Colloquium, 1997
AbstractMagnetized objects surrounded by a turbulent and keplerian accretion disk are considered. In such systems, magnetic field lines are embedded into the disk. The magnetic field of the central object is assumed to be dipolar in the absence of the accretion disk.
Anne Bardou, Jean Heyvaerts
openaire   +1 more source

Formation of the Asymmetric Accretion Disk from Stellar Wind Accretion in an S-type Symbiotic Star

The Astrophysical Journal, 2022
Abstract The accretion process in a typical S-type symbiotic star, targeting AG Draconis, is investigated through 3D hydrodynamical simulations using the FLASH code. Regardless of the wind velocity of the giant star, an accretion disk surrounding the white dwarf is always formed.
Young-Min Lee, Hyosun Kim, Hee-Won Lee
openaire   +2 more sources

Host‐Directed Biomaterials for Combatting Bloodstream Infections: From Macrocyclic Peptides to Immune‐Activating Cell Backpacks

Advanced Functional Materials, EarlyView.
Bloodstream infections (BSI) are one of the leading causes of mortality and morbidity in both civilian and military populations. This paper summarizes recent progress in novel treatment strategies to manage BSI arising from both bacterial and fungal pathogens using molecules, particles, and materials to elicit host‐directed immunity.
Thomas Thomou, Jagadish Krishnappa, Justin B. Schaal, Prasad Tongaonkar, Dat Q. Tran, Wenchao Gu, Yung‐Fu Chang, Michael E. Selsted, Shaoyi Jiang, Samir Mitragotri, Michael Super, Christopher J. Bettinger   +11 more
wiley   +1 more source

A Bespoke Programmable Interpenetrating Elastomer Network Composite Laryngeal Stent for Expedited Paediatric Laryngotracheal Reconstruction

Advanced Functional Materials, EarlyView.
A programmable interpenetrating double‐network architecture, created via 3D‐TIPS printing and resin infusion, synergistically combines thermoplastic and thermosetting elastomers to balance structural rigidity and surface softness—crucial for paediatric laryngeal stents.
Elizabeth F. Maughan, Lei Wu, Dong Zhang, Linxiao Wu, Graca Ferreira Vaz Pinto Mendes, Wanqiao J. Tu, Heping Ma, Toby J. Proctor, Colin R. Butler, Thomas Kjærgaard, Mark W. Lowdell, Martin A. Birchall, Robert E. Hynds, Richard Hewitt, Wenhui Song   +14 more
wiley   +1 more source

The Population of Massive Stars in Active Galactic Nuclei Disks

The Astrophysical Journal
Gravitational instability in the outskirts of active galactic nuclei (AGN) disks leads to disk fragmentation and formation of ∼300 M _⊙ supermassive stars with potentially long lifetimes.
Yi-Xian Chen, Douglas N. C. Lin
doaj   +1 more source

Intermediate mass black holes in AGN disks: I. Production & Growth

, 2012
Here we propose a mechanism for efficiently growing intermediate mass black holes (IMBH) in disks around supermassive black holes. Stellar mass objects can efficiently agglomerate when facilitated by the gas disk.
Alexander, Alibert, Armitage, Armitage, Artymowicz, Artymowicz, B. McKernan, Baruteau, Begelmann, Binney, Bitsch, Chang, Cresswell, Crida, Doherty, Fregeau, Goodman, H. B. Perets, Hopkins, Horn, Islam, Jiang, K. E. S. Ford, Kawawatu, King, Kormendy, Krolik, Levin, Lyra, Madau, McKernan, McKernan, McKernan, McKernan, McKernan, Merritt, Micic, Miller, Miller, Miralda Escudé, Morris, Muto, Nayakshin, Ostriker, Paardekooper, Perets, Perets, Pollack, Portegies-Zwart, Portegies-Zwart, Quinlan, Rauch, Remillard, Schödel, Shakura, Shankar, Sirko, Subr, Syer, Syer, Veras, Vittorini, W. Lyra, Ward, Winter   +64 more
core   +1 more source

Circumstellar Disks in the Orion Nebula Cluster [PDF]

, 1998
We combine our previous optical spectroscopic and photometric analysis of ~1600 stars located in the Orion Nebula Cluster (ONC) with our own and published near-infrared photometric surveys of the region in order to investigate the evidence for and ...
Calvet, Nuria, Gatley, Ian, Hillenbrand, Lynne A., Makidon, Russell B., Merrill, K. Michael, Meyer, Michael R., Skrutskie, Michael F., Strom, Stephen E.   +7 more
core   +1 more source

Exploiting Two‐Photon Lithography, Deposition, and Processing to Realize Complex 3D Magnetic Nanostructures

Advanced Functional Materials, EarlyView.
Two‐photon lithography (TPL) enables 3D magnetic nanostructures with unmatched freedom in geometry and material choice. Advances in voxel control, deposition, and functionalization open pathways to artificial spin ices, racetracks, microrobots, and a number of additional technological applications.
Joseph Askey, Arjen van den Berg, Sandra Ruiz Gomez, Claire Donnelly, Dirk Grundler, Sam Ladak   +5 more
wiley   +1 more source

Inner disk regions revealed by infrared interferometry

, 2007
I review the results obtained by long-baseline interferometry at infrared wavelengths on the innermost regions around young stars. These observations directly probe the location of the dust and gas in the disks.
Casse, Fabien Malbet, Isella, Kraus, Lachaume, Lachaume, Leinert, Malbet, Malbet, Malbet, Natta, Preibisch, Ratzka, Tatulli, Thi, Wilkin, Ábrahám   +16 more
core   +2 more sources

Accretion Disks in the Sub-Stellar Realm: Properties and Evolution [PDF]

Proceedings of the International Astronomical Union, 2009
AbstractIt is now well established that young brown dwarfs harbor accretion disks –and thus undergo a T Tauri phase– similar to their low-mass stellar counterparts. The supporting evidence includes infrared and millimeter observations of the dust component as well as optical and infrared spectra with signatures of gas accretion and outflow.
openaire   +1 more source