Results 51 to 60 of about 31,802 (281)

The role of binarity in Wolf-Rayet central stars of planetary nebulae

, 2015
Over a hundred planetary nebulae (PNe) are known to have H-deficient central stars that mimic the spectroscopic appearance of massive Wolf-Rayet stars. The formation of these low-mass Wolf-Rayet stars, denoted [WR] stars, remains poorly understood. While
Manick, Rajeev, McBride, Vanessa, Miszalski, Brent   +2 more
core   +1 more source

Mechanoregulatory Effects of Cell‐Scale Microwells on Epithelial Cell Phenotype

Advanced Functional Materials, EarlyView.
In small polycaprolactone microwells, A549 epithelial cells span well edges, in contrast to cells growing on flat substrates. Focal adhesion sites (yellow) concentrate at topographic boundaries, while cytoskeletal tension (magenta stress fibers) is transmitted to the nucleus (blue), reducing nuclear sphericity.
Ruiwen He, Wang Sik Lee, Phattadon Yajan, Aaron Lee, Mauro Sousa de Almeida, Sandeep Keshavan, Jozef Adamcik, Céline Loussert‐Fonta, Dimitri Vanhecke, Barbara Rothen‐Rutishauser, Alke Petri‐Fink   +10 more
wiley   +1 more source

The Energy Sharing Timescale in an Analytic Framework for Common Envelope Hydrodynamics

The Astrophysical Journal Letters
We propose a new predictive theory for the analysis of common envelope (CE) events that incorporates the effects of relevant hydrodynamical processes into a simple analytical framework.
Rosa Wallace Everson, Morgan MacLeod, Enrico Ramirez-Ruiz   +2 more
doaj   +1 more source

Merger by Migration at the Final Phase of Common Envelope Evolution

, 2012
I find the common envelope (CE) energy formalism, the CE \alpha-prescription, to be inadequate to predict the final orbital separation of the CE evolution in massive envelopes.
Alibert, Artymowicz, Chomiuk, Clayton, De Marco, De Marco, García-Berro, Han, Han, Iben, Ilkov, Ivanova, Ivanova, Kashi, Livio, Livio, Lombardi, Maxted, Nelemans, Nelemans, Nelson, Noam Soker, Paczynski, Passy, Rasio, Sandquist, Soker, Soker, Soker, Soker, Sparks, Taam, Taam, Tauris, Tout, Webbink, Webbink, Xu, Zorotovic   +38 more
core   +1 more source

Fractal Measures and Nonlinear Dynamics of Overcontact Binaries [PDF]

, 2019
Overcontact binary stars are systems of two stars where the component stars are in contact with each other. This implies that they share a common envelope of gas.
Ambika, G., George, Sandip V., Misra, R.
core   +2 more sources

Successful Common Envelope Ejection and Binary Neutron Star Formation in 3D Hydrodynamics

, 2020
A binary neutron star merger has been observed in a multi-messenger detection of gravitational wave (GW) and electromagnetic (EM) radiation. Binary neutron stars that merge within a Hubble time, as well as many other compact binaries, are expected to form via common envelope evolution.
Law-Smith, Jamie A. P., Everson, Rosa Wallace, Ramirez-Ruiz, Enrico, de Mink, Selma E., van Son, Lieke A. C., Götberg, Ylva, Zellmann, Stefan, Vigna-Gómez, Alejandro, Renzo, Mathieu, Wu, Samantha, Schrøder, Sophie L., Foley, Ryan J., Hutchinson-Smith, Tenley   +12 more
openaire   +2 more sources

Revisiting the common envelope evolution in binary stars: A new semianalytic model for N -body and population synthesis codes

Physical Review D, 2022
We present a novel way of modeling common envelope evolution in binary and few-body systems. We consider the common envelope inspiral as driven by a drag force with a power-law dependence in relative distance and velocity. The orbital motion is resolved either by direct N-body integration or by solving the set of differential equations for the orbital ...
Trani, Alessandro Alberto, Rieder, Steven, Tanikawa, Ataru, Iorio, Giuliano, Martini, Riccardo, Karelin, Georgii, Glanz, Hila, Portegies Zwart, Simon   +7 more
openaire   +2 more sources

Neuromorphic Electronics for Intelligence Everywhere: Emerging Devices, Flexible Platforms, and Scalable System Architectures

Advanced Materials, EarlyView.
The perspective presents an integrated view of neuromorphic technologies, from device physics to real‐time applicability, while highlighting the necessity of full‐stack co‐optimization. By outlining practical hardware‐level strategies to exploit device behavior and mitigate non‐idealities, it shows pathways for building efficient, scalable, and ...
Kapil Bhardwaj, Roshni Satheesh Babu, Yuxin Xia, Eva Bestelink, Radu Sporea, Nikos Hastas, Ioannis Zeimpekis, Dimitra G. Georgiadou, Sayani Majumdar   +8 more
wiley   +1 more source

The Effect of Donor Star Rejuvenation on Common Envelope Evolution

The Astrophysical Journal
In close binary star systems, common envelope evolution (CEE) may occur after a previous phase of mass transfer. Some isolated formation channels for double neutron star binaries suggest that the donor of CEE was the accretor of a previous phase of ...
C. Landri, P. M. Ricker, M. Renzo, S. Rau, A. Vigna-Gómez   +4 more
doaj   +1 more source

Shaping Planetary Nebulae with Jets and the Grazing Envelope Evolution

Galaxies, 2020
I argue that the high percentage of planetary nebulae (PNe) that are shaped by jets show that main sequence stars in binary systems can accrete mass at a high rate from an accretion disk and launch jets.
Noam Soker
doaj   +1 more source