Orbital character effects in the photon energy and polarization dependence of pure C60 photoemission

Posted by klaurent Berkeley

Kavli Affiliate: Alessandra Lanzara | First 5 Authors: Drew W. Latzke, Claudia Ojeda-Aristizabal, Jonathan D. Denlinger, Ryan Reno, Alex Zettl | Summary: Recent direct experimental observation of multiple highly-dispersive C$_{60}$ valence bands has allowed for a detailed analysis of the unique photoemission traits of these features through photon energy- and polarization-dependent measurements. Previously obscured dispersions […]


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Astro 2020: Astromineralogy of interstellar dust with X-ray spectroscopy

Posted by klaurent MIT

Kavli Affiliate: Norbert Schulz | First 5 Authors: [#item_custom_name[1]], [#item_custom_name[2]], [#item_custom_name[3]], [#item_custom_name[4]], [#item_custom_name[5]] | Summary: X-ray absorption fine structure (XAFS) in the 0.2-2 keV band is a crucial component in multi-wavelength studies of dust mineralogy, size, and shape — parameters that are necessary for interpreting astronomical observations and building physical models across all fields, from […]


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Dirac’s algorithm in the presence of boundaries: a practical guide to a geometric approach

Posted by klaurent MIT

Kavli Affiliate: J. S. Villasenor | First 5 Authors: J. Fernando Barbero G., Bogar Díaz, Juan Margalef-Bentabol, Eduardo J. S. Villaseñor, | Summary: The goal of this paper is to propose and discuss a practical way to implement the Dirac algorithm for constrained field models defined on spatial regions with boundaries. Our method is inspired […]


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Search for $γ$-ray emission from dark matter particle interactions from Andromeda and Triangulum Galaxies with the Fermi Large Area Telescope

Posted by klaurent Stanford

Kavli Affiliate: Eric Charles | First 5 Authors: Mattia Di Mauro, Xian Hou, Christopher Eckner, Gabrijela Zaharijas, Eric Charles | Summary: The Andromeda (M31) and Triangulum (M33) galaxies are the closest Local Group galaxies to the Milky Way, being only 785 and 870 kpc away. These two galaxies provide an independent view of high-energy processes […]


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Spectral Variability of a Sample of Extreme Variability Quasars and Implications for the MgII Broad-line Region

Posted by klaurent Stanford

Kavli Affiliate: Rafe Schindler | First 5 Authors: Qian Yang, Yue Shen, Yu-Ching Chen, Xin Liu, James Annis | Summary: We present new Gemini/GMOS optical spectroscopy of 16 extreme variability quasars (EVQs) that dimmed by more than 1.5 mag in the $g$ band between the Sloan Digital Sky Survey (SDSS) and the Dark Energy Survey […]


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Detectability of CMB Weak Lensing and HI Cross Correlation and constraints on cosmological parameters

Posted by klaurent Tokyo

Kavli Affiliate: Naoshi Sugiyama | First 5 Authors: Shoichiro Tanaka, Shintaro Yoshiura, Kenji Kubota, Keitaro Takahashi, Atsushi J. Nishizawa | Summary: Neutral hydrogen (H$_{rm I}$) intensity mapping is capable of measuring redshift evolution of H$_{rm I}$ density parameter $Omega_{rm H_{rm I}}$, which is an important parameter to understand structure formation in the post-reionization epoch. Future […]


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Shuffle algebras and perverse sheaves

Posted by klaurent Tokyo

Kavli Affiliate: Mikhail Kapranov | First 5 Authors: Mikhail Kapranov, Vadim Schechtman, , , | Summary: We relate shuffle algebras, as defined by Nichols, Feigin-Odesskii and Rosso, to perverse sheaves on symmetric products of the complex line (i.e., on the spaces of monic polynomials stratified by multiplicities of roots). More precisely, we construct an equivalence […]


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Astro2020 Science White Paper: Using X-Ray Polarimetry to Probe the Physics of Black Holes and Neutron Stars

Posted by klaurent MIT

Kavli Affiliate: Herman Marshall | First 5 Authors: Henric Krawczynski, Giorgio Matt, Adam R. Ingram, Roberto Taverna, Roberto Turolla | Summary: This white paper highlights compact object and fundamental physics science opportunities afforded by high-throughput broadband (0.1-60 keV) X-ray polarization observations. X-ray polarimetry gives new observables with geometric information about stellar remnants which are many […]


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Discovery and Early Evolution of ASASSN-19bt, the First TDE Detected by TESS

Posted by klaurent MIT

Kavli Affiliate: Michael M. Fausnaugh | First 5 Authors: Thomas W. -S. Holoien, Patrick J. Vallely, Katie Auchettl, K. Z. Stanek, Christopher S. Kochanek | Summary: We present the discovery and early evolution of ASASSN-19bt, a tidal disruption event (TDE) discovered by the All-Sky Automated Survey for Supernovae (ASAS-SN) at a distance of $dsimeq115$ Mpc […]


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