2021 – Page 49 – Kavli Institute Pre-Print Publications

Effective continuum models for the buckling of non-periodic architected sheets that display quasi-mechanism behaviors

Posted by July 4, 2021Uncategorized

Kavli Affiliate: Chiara Daraio | First 5 Authors: Connor McMahan, Andrew Akerson, Paolo Celli, Basile Audoly, Chiara Daraio | Summary: In this work, we construct an effective continuum model for architected sheets that are composed of bulky tiles connected by slender elastic joints. Due to their mesostructure, these sheets feature quasi-mechanisms — low-energy local kinematic […]

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A shock near the virial radius of the Perseus Cluster

Posted by klaurent July 4, 2021Stanford

Kavli Affiliate: Steven W. Allen | First 5 Authors: Zhenlin Zhu, Aurora Simionescu, Hiroki Akamatsu, Xiaoyuan Zhang, Jelle S. Kaastra | Summary: Previous X-ray studies of the Perseus Cluster, consisting of 85 Suzaku pointings along eight azimuthal directions, revealed a particularly steep decrease in the projected temperature profile near the virial radius (~r200) towards the […]

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Tunable strong coupling of mechanical resonance between spatially separated FePS$_3$ nanodrums

Posted by klaurent July 2, 2021Delft

Kavli Affiliate: Herre S. J. Van Der Zant | First 5 Authors: Makars Šiškins, Ekaterina Sokolovskaya, Martin Lee, Samuel Mañas-Valero, Dejan Davidovikj | Summary: Coupled nanomechanical resonators made of two-dimensional materials are promising for processing information with mechanical modes. However, the challenge for these types of systems is to control the coupling. Here, we demonstrate […]

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Neutrino constraints on long-lived heavy dark sector particle decays in the Earth

Posted by klaurent July 2, 2021Chicago

Kavli Affiliate: Angela V. Olinto | First 5 Authors: Mary Hall Reno, Luis A. Anchordoqui, Atri Bhattacharya, Austin Cummings, Johannes Eser | Summary: Recent theoretical work has explored dark matter accumulation in the Earth and its drift towards the center of the Earth that, for the current age of the Earth, does not necessarily result […]

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Constraining particle acceleration in Sgr A* with simultaneous GRAVITY, Spitzer, NuSTAR and Chandra observations

Posted by klaurent July 2, 2021Stanford

Kavli Affiliate: R. Morris | First 5 Authors: R. Abuter, A. Amorim, M. Bauböck, F. Baganoff, J. P. Berge | Summary: We report the time-resolved spectral analysis of a bright near-infrared and moderate X-ray flare of Sgr A*. We obtained light curves in the $M$-, $K$-, and $H$-bands in the mid- and near-infrared and in […]

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The Hough Stream Spotter: A New Method for Detecting Linear Structure in Resolved Stars and Application to the Stellar Halo of M31

Posted by klaurent June 30, 2021Stanford

Kavli Affiliate: Susan E. Clark | First 5 Authors: Sarah Pearson, Susan E. Clark, Alexis J. Demirjian, Kathryn V. Johnston, Melissa K. Ness | Summary: Stellar streams from globular clusters (GCs) offer constraints on the nature of dark matter and have been used to explore the dark matter halo structure and substructure of our Galaxy. […]

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High conductivity Polarization-induced 2D hole gases in Undoped GaN/AlN Heterojunctions enabled by Impurity Blocking Layers

Posted by June 30, 2021Cornell

Kavli Affiliate: Grace Xing | First 5 Authors: Reet Chaudhuri, Zhen Chen, David Muller, Huili Grace Xing, Debdeep Jena | Summary: High-conductivity undoped GaN/AlN 2D hole gases (2DHGs), the p-type dual of the AlGaN/GaN 2D electron gases (2DEGs), have offered valuable insights into hole transport in GaN and enabled the first GaN GHz RF p-channel […]

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Evidence of Accretion Burst: The Viscously Heated Inner Disk of the Embedded Protostar IRAS 16316-1540

Posted by klaurent June 30, 2021Peking

Kavli Affiliate: Gregory J. Herczeg | First 5 Authors: Sung-Yong Yoon, Jeong-Eun Lee, Seokho Lee, Gregory J. Herczeg, Sunkyung Park | Summary: Outbursts of young stellar objects occur when the mass accretion rate suddenly increases. However, such outbursts are difficult to detect for deeply embedded protostars due to their thick envelope and the rarity of […]

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Measurements of the Hubble Constant: Tensions in Perspective

Posted by klaurent June 29, 2021Chicago

Kavli Affiliate: Wendy L. Freedman | First 5 Authors: Wendy L. Freedman, , , , | Summary: Measurement of the distances to nearby galaxies have improved rapidly in recent decades. The ever-present challenge is to reduce systematic effects, especially as greater distances are probed, and the uncertainties become larger. In this paper, we combine several […]

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Probing Relativistic Axions from Transient Astrophysical Sources

Posted by klaurent June 28, 2021Tokyo

Kavli Affiliate: Yevgeny V. Stadnik | First 5 Authors: Joshua Eby, Satoshi Shirai, Yevgeny V. Stadnik, Volodymyr Takhistov, | Summary: Emission of relativistic axions from transient sources, such as axion star explosions, can lead to observable signatures. We show that axion bursts from collapsing axion stars can be detectable over the wide range of axion […]

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