In-situ non-equilibrium nanomechanics in a proton-conducting ceramic at low temperatures

Posted by dbos Cornell

Kavli Affiliate: Jin Suntivich | First 5 Authors: Oleg Yu. Gorobtsov, Yumeng Song, Kevin Fritz, Daniel Weinstock, Yifei Sun | Summary: Nanostructured proton-conducting ceramics (PCCs) have attracted considerable interest as moderate-temperature proton conductors. Structure dynamics during proton conduction, particularly at grain boundaries, are crucial for stability and proton transport in nanostructured PCCs. A common assumption […]


Continue.. In-situ non-equilibrium nanomechanics in a proton-conducting ceramic at low temperatures

In-situ non-equilibrium nanomechanics in a proton-conducting ceramic at low temperatures

Posted by dbos Cornell

Kavli Affiliate: Jin Suntivich | First 5 Authors: Oleg Yu. Gorobtsov, Yumeng Song, Kevin Fritz, Daniel Weinstock, Yifei Sun | Summary: Nanostructured proton-conducting ceramics (PCCs) have attracted considerable interest as moderate-temperature proton conductors. Structure dynamics during proton conduction, particularly at grain boundaries, are crucial for stability and proton transport in nanostructured PCCs. A common assumption […]


Continue.. In-situ non-equilibrium nanomechanics in a proton-conducting ceramic at low temperatures

Mass Transfer and Stellar Evolution of the White Dwarfs in AM CVn Binaries

Posted by klaurent UCSB

Kavli Affiliate: Lars Bildsten | First 5 Authors: Tin Long Sunny Wong, Lars Bildsten, , , | Summary: We calculate the stellar evolution of both white dwarfs (WDs) in AM CVn binaries with orbital periods of $P_{mathrm{orb}} approx 5-70$ minutes. We focus on the cases where the donor starts as a $M_{mathrm{He}} < 0.2 , […]


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SOAR/Goodman Spectroscopic Assessment of Candidate Counterparts of the LIGO–Virgo Event GW190814

Posted by Chicago

Kavli Affiliate: Daniel Holz | First 5 Authors: Douglas Tucker, Matthew Wiesner, Sahar Allam, Marcelle Soares-Santos, Clecio de Bom | Summary: On 2019 August 14 at 21:10:39 UTC, the LIGO/Virgo Collaboration (LVC) detected a possible neutron star-black hole merger (NSBH), the first ever identified. An extensive search for an optical counterpart of this event, designated […]


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A Strategy to Identify Materials Exhibiting a Large Nonlinear Phononics Response: Tuning the Ultrafast Structural Response of LaAlO$_3$ with Pressure

Posted by klaurent Cornell

Kavli Affiliate: Nicole A. Benedek | First 5 Authors: Jeffrey Z. Kaaret, Guru Khalsa, Nicole A. Benedek, , | Summary: We use theory and first-principles calculations to investigate how structural changes induced by ultrafast optical excitation of infrared-active phonons change with hydrostatic pressure in LaAlO$_3$. Our calculations show that the observed structural changes are sensitive […]


Continue.. A Strategy to Identify Materials Exhibiting a Large Nonlinear Phononics Response: Tuning the Ultrafast Structural Response of LaAlO$_3$ with Pressure

A Strategy to Identify Materials Exhibiting a Large Nonlinear Phononics Response: Tuning the Ultrafast Structural Response of LaAlO$_3$ with Pressure

Posted by klaurent Cornell

Kavli Affiliate: Nicole A. Benedek | First 5 Authors: Jeffrey Z. Kaaret, Guru Khalsa, Nicole A. Benedek, , | Summary: We use theory and first-principles calculations to investigate how structural changes induced by ultrafast optical excitation of infrared-active phonons change with hydrostatic pressure in LaAlO$_3$. Our calculations show that the observed structural changes are sensitive […]


Continue.. A Strategy to Identify Materials Exhibiting a Large Nonlinear Phononics Response: Tuning the Ultrafast Structural Response of LaAlO$_3$ with Pressure

A [C II] 158$μ$m Emitter Associated with an OI Absorber at the End of the Reionization Epoch

Posted by klaurent Peking

Kavli Affiliate: Ran Wang | First 5 Authors: Yunjing Wu, Zheng Cai, Marcel Neeleman, Kristian Finlator, Shiwu Zhang | Summary: The physical and chemical properties of the circumgalactic medium (CGM) at $zgtrsim6$ have been studied successfully through the absorption in the spectra of background Quasi-Stellar Objects (QSOs). One of the most crucial questions is to […]


Continue.. A [C II] 158$μ$m Emitter Associated with an OI Absorber at the End of the Reionization Epoch

Cosmic Reionization on Computers: Evolution of the Flux Power Spectrum

Posted by Chicago

Kavli Affiliate: Nickolay Gnedin | First 5 Authors: Nishant Mishra, Nickolay Gnedin, , , | Summary: We explore the evolution of the flux power spectrum in the Cosmic Reionization On Computers (CROC) simulations. We find that, contrary to some previous studies, the shape of the flux power spectrum is rather insensitive to the timing of […]


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How low can you go? SN 2018zd as a low-mass Fe core-collapse supernova

Posted by klaurent Peking

Kavli Affiliate: Subo Dong | First 5 Authors: E. Callis, M. Fraser, A. Pastorello, Subo Dong, S. J. Brennan | Summary: We present spectroscopy and photometry of SN 2018zd, a Type IIP core-collapse supernova with signatures of interaction with circumstantial material in its earliest spectra. High ionization lines, the earmark of shock breakout, are not […]


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Primordial Black Holes from CDM Isocurvature Perturbations

Posted by klaurent Tokyo

Kavli Affiliate: Misao Sasaki | First 5 Authors: Samuel Passaglia, Misao Sasaki, , , | Summary: We show that primordial black holes can be produced from the collapse of large isocurvature perturbations of the cold dark matter. We develop a novel procedure to compute the resulting black hole abundance by studying matched perturbations of matter-only […]


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