Lynx grating spectrometer design: Optimizing chirped transmission gratings

Kavli Affiliate: Ralf K. Heilmann | First 5 Authors: Hans Moritz Günther, Ralf K. Heilmann, , , | Summary: Lynx is one of four large-mission concept studies for NASA’s 2020 Decadal survey. The design reference mission includes an X-ray grating spectrometer (XGS) based on critical-angle transmission (CAT) gratings. In the past we studied different grating […]


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Ray-tracing a small orbital mission for soft-X-ray polarimetry

Kavli Affiliate: Herman L. Marshall | First 5 Authors: Hans Moritz Günther, Herman L. Marshall, Alan Garner, , | Summary: X-ray polarimetry is still largely uncharted territory. With the upcoming launch of IXPE, we will learn a lot more about X-ray polarization at energies above 2 keV, but so far no current or accepted mission […]


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Membrane Nanodomains Homeostasis During Propofol Anesthesia as Function of Dosage and Temperature

Kavli Affiliate: Michael Zucker | First 5 Authors: Weixiang Jin, Michael Zucker, Arnd Pralle, , | Summary: Some anesthetics bind and potentiate gamma-aminobutyric-acid-type receptors, but no universal mechanism for general anesthesia is known. Furthermore, often encountered complications such as anesthesia induced amnesia are not understood. General anesthetics are hydrophobic molecules easily dissolving into lipid bilayers. […]


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Automatic coding of students’ writing via Contrastive Representation Learning in the Wasserstein space

Kavli Affiliate: Eric Miller | First 5 Authors: Ruijie Jiang, Julia Gouvea, David Hammer, Eric Miller, Shuchin Aeron | Summary: Qualitative analysis of verbal data is of central importance in the learning sciences. It is labor-intensive and time-consuming, however, which limits the amount of data researchers can include in studies. This work is a step […]


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Two young planetary systems around field stars with ages between 20-320 Myr from TESS

Kavli Affiliate: Andrew M. Vanderburg | First 5 Authors: George Zhou, Samuel N. Quinn, Jonathan Irwin, Chelsea X. Huang, Karen A. Collins | Summary: Planets around young stars trace the early evolution of planetary systems. We report the discovery and validation of two planetary systems with ages $lesssim 300$ Myr from observations by the Transiting […]


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The Magellan-TESS Survey I: Survey Description and Mid-Survey Results

Kavli Affiliate: George Ricker | First 5 Authors: Johanna Teske, Sharon Xuesong Wang, Angie Wolfgang, Tianjun Gan, Mykhaylo Plotnykov | Summary: $Kepler$ revealed that roughly one-third of Sun-like stars host planets orbiting within 100 days and between the size of Earth and Neptune. How do these planets form, what are they made of, and do […]


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Data Processing Pipeline For Tianlai Experiment

Kavli Affiliate: Kiyoshi W. Masui | First 5 Authors: Shifan Zuo, Jixia Li, Yichao Li, Das Santanu, Albert Stebbins | Summary: The Tianlai project is a 21cm intensity mapping experiment aimed at detecting dark energy by measuring the baryon acoustic oscillation (BAO) features in the large scale structure power spectrum. This experiment provides an opportunity […]


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Interstellar and Circumgalactic Properties of an Unseen $z=6.84$ Galaxy: Abundances, Ionization, and Heating in the Earliest Known Quasar Absorber

Kavli Affiliate: Gabor Furesz | First 5 Authors: Robert A. Simcoe, Masafusa Onoue, Anna-Christina Eilers, Eduardo Banados, Thomas J. Cooper | Summary: We analyze relative abundances and ionization conditions in a strong absorption system at z=6.84, seen in the spectrum of the z=7.54 background quasar ULAS J134208.10+092838.61. Singly ionized C, Si, Fe, Mg, and Al […]


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Dynamically Tagged Groups of Very Metal-poor Halo Stars from the HK and Hamburg/ESO Surveys

Kavli Affiliate: Anna Frebel | First 5 Authors: Guilherme Limberg, Silvia Rossi, Timothy C. Beers, Hélio D. Perottoni, Angeles Pérez-Villegas | Summary: We analyze the dynamical properties of $sim$1500 very metal-poor (VMP; [Fe/H] $lesssim -2.0$) halo stars, based primarily on medium-resolution spectroscopic data from the HK and Hamburg/ESO surveys. These data, collected over the past […]


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Correlated X-ray and optical variability in the O-type supergiant zeta Puppis

Kavli Affiliate: David P. Huenemoerder | First 5 Authors: Joy S. Nichols, Yael Naze, David P. Huenemoerder, Anthony F. J. Moffat, Nathan Miller | Summary: Analysis of the recent long exposure Chandra X-ray observation of the early-type O star zeta Pup shows clear variability with a period previously reported in optical photometric studies. These 813 […]


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