Results 131 to 140 of about 1,172 (243)
Accretion flares from stellar collisions in galactic nuclei
Astronomy & AstrophysicsContext. The strong tidal force in a supermassive black hole’s (SMBH) vicinity, coupled with a higher stellar density at the center of a galaxy, make it an ideal location to study the interaction between stars and black holes. Two stars moving near the SMBH could collide at a very high speed, which can result in a high energy flare.
B. X. Hu, A. Loeb
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Ground to Dust: Collisional Cascades and the Fate of Kardashev II Megaswarms
The Astrophysical JournalExtraterrestrial intelligences are speculated to surround stars with structures to collect their energy or to signal distant observers. If they exist, these most likely are megaswarms, vast constellations of satellites (elements) in orbit around the ...
Brian C. Lacki
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Advanced Materials, EarlyView.Nanoscale metal–organic frameworks (MOFs) and nanocellulose composites have significant potential for the multi‐functional remediation of the environment. This review focused on the synthesis strategies (in situ growth, ex situ growth, and other approaches), typical forms (aerogel, hydrogel, beads, and membrane), and applications in the removal of ...
Ye Song +13 more
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A Monte Carlo Code to Investigate Stellar Collisions in Dense Galactic Nuclei
, 2001 Marc Freitag, W. Benz
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The Secular Periodic Evolution of X-Ray Quasiperiodic Eruptions Driven by Star−Disk Collisions
The Astrophysical JournalWe study the secular periodic evolution of quasiperiodic eruptions (QPEs) for GSN069 and eRO-QPE2 assuming that they are driven by star−disk collisions. We set up numerical simulations and compared them with the observed periodic decay of ∼−3160 ± 720 s ...
Jiajun Xian +3 more
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Thermally Actuated Soft Robotics
Advanced Materials, EarlyView.This review focuses on the recent development of thermally actuated soft robotics, highlighting the four major heating mechanisms, as well as structural designs, thermal management, material innovations, and emerging applications. A summary and outlook section present the current challenges of thermally actuated soft robots and the future directions to
Shuang Wu +2 more
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Evolution of the remnants of stellar collisions
, 2008 Collisions between stars occur naturally in star clusters. The outcome of such collisions is a new single star that may have peculiar properties that affect its subsequent evolution. For low mass stars, such merger events are a possible formation channel for blue straggler stars, stars more massive than expected for a starcluster of a given age.
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Stability of C59 Knockout Fragments from Femtoseconds to Infinity
The Astrophysical JournalWe have studied the stability of C _59 anions as a function of time, from their formation on femtosecond timescales to their stabilization on second timescales and beyond, using a combination of theory and experiments. The ${{\rm{C}}}_{59}^{-}$ fragments
Michael Gatchell +11 more
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Advanced Materials, EarlyView.This study presents an implantable reinforced cardiac patch (RCPatch) combining volumetrically 3D‐printed metamaterials with melt‐electrowritten (MEW) meshes. The design integrates tunable stiff polymer structures with soft, cell‐laden hydrogels. The RCPatch withstands suturing, intraventricular pressure, and cardiac contraction in a large animal ...
Lewis S. Jones +12 more
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Origins of Super Jupiters: TOI-2145b has a Moderately Eccentric and Nearly Aligned Orbit
The Astronomical JournalSuper Jupiters are giant planets with several Jupiter masses. It remains an open question whether these planets originate with such high masses or grow through collisions.
Jiayin Dong +17 more
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