Epitaxial lattice-matched Al$_{0.89}$Sc$_{0.11}$N/GaN distributed Bragg reflectors

Posted by dbos Cornell

Kavli Affiliate: Grace Xing | First 5 Authors: Len van Deurzen, Thai-Son Nguyen, Joseph Casamento, Huili Grace Xing, Debdeep Jena | Summary: We demonstrate epitaxial lattice-matched Al$_{0.89}$Sc$_{0.11}$N/GaN ten and twenty period distributed Bragg reflectors (DBRs) grown on c-plane bulk n-type GaN substrates by plasma-enhanced molecular beam epitaxy (PA-MBE). Resulting from a rapid increase of in-plane […]


Continue.. Epitaxial lattice-matched Al$_{0.89}$Sc$_{0.11}$N/GaN distributed Bragg reflectors

Statistics of thermal gas pressure as a probe of cosmology and galaxy formation

Posted by klaurent Tokyo

Kavli Affiliate: Eiichiro Komatsu | First 5 Authors: Ziyang Chen, Drew Jamieson, Eiichiro Komatsu, Sownak Bose, Klaus Dolag | Summary: The statistics of thermal gas pressure are a new and promising probe of cosmology and astrophysics. The large-scale cross-correlation between galaxies and the thermal Sunyaev-Zeldovich effect gives the bias-weighted mean electron pressure, $langle b_mathrm{h}P_erangle$. In […]


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Magnetism and magnetocaloric properties of Co$_{1-x}$Mn$_x$Cr$_2$O$_4$

Posted by klaurent Berkeley

Kavli Affiliate: Kristin A. Persson | First 5 Authors: Joya A. Cooley, Gregor Dairaghi, Guy C. Moore, Matthew K. Horton, Emily C. Schueller | Summary: Co$_{1-x}$Mn$_x$Cr$_2$O$_4$ crystallizes as a normal spinel in the cubic $Fd overline{3}m$ space group, and the end members have been reported to display a region of collinear ferrimagnetism as well as […]


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The Polarized Cosmic Hand: IXPE Observations of PSR B1509-58/MSH 15-52

Posted by klaurent MIT

Kavli Affiliate: Herman L. Marshall | First 5 Authors: Roger W. Romani, Josephine Wong, Niccolo Di Lalla, Nicola Omodei, Fei Xie | Summary: We describe IXPE polarization observations of the Pulsar Wind Nebula (PWN) MSH15-52, the `Cosmic Hand’. We find X-ray polarization across the PWN, with B field vectors generally aligned with filamentary X-ray structures. […]


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Unsupervised pattern discovery in spatial gene expression atlas reveals mouse brain regions beyond established ontology

Posted by klaurent UCSF

Kavli Affiliate: Reza Abbasi Asl | Authors: Robert Cahill, Yu Wang, Alex Lee, Hongkui Zeng, Bin Yu, Bosiljka Tasic and Reza Abbasi-Asl | Summary: The growth of large-scale spatial gene expression data requires new computational tools to extract major trends in gene expression in their native spatial context. Here, we describe an unsupervised and interpretable […]


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Mixed Multi-Level Visual, Reward, and Motor Signals in Dorsomedial Frontal Cortex Area F7 during Active Naturalistic Video Exploration

Posted by klaurent Rockefeller

Kavli Affiliate: Winrich Freiwald | Authors: Farid Aboharb, Stephen Serene, Julia Sliwa and Winrich A Freiwald | Summary: In the primate brain the frontal lobes support complex functions, including social cognition. Understanding the functional organization of these regions requires an approach for rich functional characterization. Here we used a novel paradigm, the visual exploration of […]


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Noise Reduction Methods for Large-scale Intensity-mapping Measurements with Infrared Detector Arrays

Posted by klaurent Caltech

Kavli Affiliate: James Bock | First 5 Authors: Grigory Heaton, Walter Cook, James Bock, Jill Burnham, Sam Condon | Summary: Intensity mapping observations measure galaxy clustering fluctuations from spectral-spatial maps, requiring stable noise properties on large angular scales. We have developed specialized readouts and analysis methods for achieving large-scale noise stability with Teledyne 2048$times$2048 H2RG […]


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Developing integrated rate laws of complex self-assembly reactions using Lie symmetry: Kinetics of Abeta42, Abeta40 and Abeta38 co-aggregation

Posted by klaurent Harvard

Kavli Affiliate: L. Mahadevan | First 5 Authors: Alexander J. Dear, Georg Meisl, Sara Linse, L. Mahadevan, | Summary: The development of solutions to the kinetics of homomolecular self-assembly into amyloid fibrils using fixed-point methods, and their subsequent application to the analysis of in vitro kinetic experiments, has led to numerous advances in our understanding […]


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Discovery of X-ray Polarization from the Black Hole Transient Swift J1727.8-1613

Posted by klaurent MIT

Kavli Affiliate: Herman L. Marshall | First 5 Authors: Alexandra Veledina, Fabio Muleri, Michal Dovciak, Juri Poutanen, Ajay Ratheesh | Summary: We report the first detection of the X-ray polarization of the bright transient Swift J1727.8-1613 with the Imaging X-ray Polarimetry Explorer. The observation was performed at the beginning of the 2023 discovery outburst, when […]


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In-situ vs accreted Milky Way globular clusters: a new classification method and implications for cluster formation

Posted by klaurent Chicago

Kavli Affiliate: Andrey Kravtsov | First 5 Authors: Vasily Belokurov, Andrey Kravtsov, , , | Summary: We present a new scheme for the classification of the in-situ and accreted globular clusters (GCs). The scheme uses total energy $E$ and $z$-component of the orbital angular momentum and is calibrated using [Al/Fe] abundance ratio. We demonstrate that […]


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