Dynamical Instability And Its Implications For Planetary System Architecture,
2019
Nanjing University
Dynamical Instability And Its Implications For Planetary System Architecture, Dong-Hong Wu, Rachel C. Zang, Ji-Lin Zhou, Jason H. Steffen
Physics & Astronomy Faculty Research
We examine the effects that dynamical instability has on shaping the orbital properties of exoplanetary systems. Using N-body simulations of non-EMS (Equal Mutual Separation), multiplanet systems we find that the lower limit of the instability time-scale t is determined by the minimal mutual separation Kmin in units of the mutual Hill radius. Planetary systems showing instability generally include planet pairs with period ratio... (See abstract in article).
Kinematic Links And The Coevolution Of Mhd Winds, Jets, And Inner Disks From A High-Resolution Optical [Oi] Survey,
2019
University of Arizona
Kinematic Links And The Coevolution Of Mhd Winds, Jets, And Inner Disks From A High-Resolution Optical [Oi] Survey, Andrea Banzatti, Ilaria Pascucci, Suzan Edwards, Min Fang, Uma Gorti, Mario Flock
Astronomy: Faculty Publications
We present a survey of optical [O I] emission at 6300 Å toward 65 T Tauri stars at the spectral resolution of ∼7 km s−1 . Past work identified a highly blueshifted velocity component (HVC) tracing microjets and a less blueshifted low-velocity component (LVC) attributed to winds. We focus here on the LVC kinematics to investigate links between winds, jets, accretion, and disk dispersal. We track the behavior of four types of LVC components: a broad and a narrow component (“BC” and “NC,” respectively) in LVCs that are decomposed into two Gaussians which typically have an HVC, and single-Gaussian LVC …
Search For Multimessenger Sources Of Gravitational Waves And High-Energy Neutrinos With Advanced Ligo During Its First Observing Run Antares And Icecube,
2019
The University of Texas Rio Grande Valley
Search For Multimessenger Sources Of Gravitational Waves And High-Energy Neutrinos With Advanced Ligo During Its First Observing Run Antares And Icecube, A. Albert, Teviet Creighton, Mario C. Diaz, Soma Mukherjee, Volker Quetschke, Malik Rakhmanov, Karla E. Ramirez, Satzhan Sitmukhambetov, Robert Stone, Darkhan Tuyenbayev, Wenhui Wang, Adam Zadrozny
Physics & Astronomy Faculty Publications
Astrophysical sources of gravitational waves, such as binary neutron star and black hole mergers or core-collapse supernovae, can drive relativistic outflows, giving rise to non-thermal high-energy emission. High-energy neutrinos are signatures of such outflows. The detection of gravitational waves and high-energy neutrinos from common sources could help establish the connection between the dynamics of the progenitor and the properties of the outflow. We searched for associated emission of gravitational waves and high-energy neutrinos from astrophysical transients with minimal assumptions using data from Advanced LIGO from its first observing run O1, and data from the Antares and IceCube neutrino observatories from …
Electron Density Topological And Adsorbate Orbital Analyses Of Water And Carbon Monoxide Co-Adsorption On Platinum,
2019
The University of Texas Rio Grande Valley
Electron Density Topological And Adsorbate Orbital Analyses Of Water And Carbon Monoxide Co-Adsorption On Platinum, Nicholas Dimakis, Isaiah Salas, Luis Gonzalez, Neili Loupe, Eugene S. Smotkin
Physics & Astronomy Faculty Publications
The electron density topology of carbon monoxide (CO) on dry and hydrated platinum is evaluated under the quantum theory of atoms in molecules (QTAIM) and by adsorbate orbital approaches. The impact of water co-adsorbate on the electronic, structural, and vibrational properties of CO on Pt are modelled by periodic density functional theory (DFT). At low CO coverage, increased hydration weakens C-O bonds and strengthens C-Pt bonds, as verified by changes in bond lengths and stretching frequencies. These results are consistent with QTAIM, the 5σ donation-2π∗ backdonation model, and our extended Ï€-attraction σ-repulsion model (extended Ï€-σ model). This work links changes …
Wallaby Early Science – Ii. The Ngc 7232 Galaxy Group,
2019
CSIRO Astronomy and Space Science
Wallaby Early Science – Ii. The Ngc 7232 Galaxy Group, K. Lee-Waddell, Bärbel S. Koribalski, Tobias Westmeier, A. Elagali, B-Q For, D. Kleiner, Juan P. Madrid, A. Popping, T. N. Reynolds, J. Rhee
Physics & Astronomy Faculty Publications
We report on neutral hydrogen (H I) observations of the NGC 7232 group with the Australian Square Kilometre Array Pathfinder (ASKAP). These observations were conducted as part of the Wide-field ASKAP L-Band Legacy All-sky Blind surveY (WALLABY) Early Science program with an array of 12 ASKAP antennas equipped with Phased Array Feeds, which were used to form 36 beams to map a field of view of 30 deg2. Analysing a subregion of the central beams, we detect 17 H I sources. Eleven of these detections are identified as galaxies and have stellar counterparts, of which five are newly resolved H …
Results From The Cuore Experiment †,
2019
University of South Carolina
Results From The Cuore Experiment †, Alessio Caminata, Douglas Adams, Chris Alduino, Krystal Alfonso, Frank Avignone Iii, Oscar Azzolini, Giacomo Bari, Fabio Bellini, Giovanni Benato, Andrea Bersani, Matteo Biassoni, Antonio Branca, Chiara Brofferio, Carlo Bucci, Alice Campani, Lucia Canonica, Xi-Guang Cao, Silvia Capelli, Luigi Cappelli, Laura Cardani, Paolo Carniti, Et. Al.
Faculty Publications
The Cryogenic Underground Observatory for Rare Events (CUORE) is the first bolometric experiment searching for neutrinoless double beta decay that has been able to reach the 1-ton scale. The detector consists of an array of 988 TeO2 crystals arranged in a cylindrical compact structure of 19 towers, each of them made of 52 crystals. The construction of the experiment was completed in August 2016 and the data taking started in spring 2017 after a period of commissioning and tests. In this work we present the neutrinoless double beta decay results of CUORE from examining a total TeO2 exposure …
Results From The Cuore Experiment,
2019
University of South Carolina
Results From The Cuore Experiment, Alessio Caminata, Douglass Adams, Chris Aldunio, Krystal Alfonso, Frank Avignone Iii, Oscar Azzolini, Giacomo Bari, Fabio Bellini, Giovanni Benato, Andrea Bersani, Matteo Biassoni, Antonio Branca, Chiara Brofferio, Carlo Bucci, Alice Campani, Lucia Canonica, Xi-Guang Cao, Silvia Capelli, Luigi Cappelli, Laura Cardani, Paolo Carniti, Nicola Casali, Davide Chiesa, Nicholas Chott, Massimiliano Clemenza, Simone Copello, Carlo Cosmelli, Oliviero Cremonesi, Richard Creswick, Jeremy Cushman, Antonio D’Addabbo, Damiano D'Aguanno, Ioan Dafinei, Christopher Davis, Stefano Dell’Oro, Milena Deninno, Sergio Di Domizio, Valentina Dompè, Alexey Drobizhev, De-Qing Fang, Guido Fantini, Marco Faverzani, Elena Ferri, Fernando Ferroni, Ettore Fiorini, Massimo Alberto Franceschi, Stuart Freedman, Brian Fujikawa, Andrea Giachero, Luca Gironi, Andrea Giuliani, Paolo Gorla, Claudio Gotti, Thomas Gutierrez, Ke Han, Karsten Heeger, Roger Huang, Huan Zhong Huang, Joe Johnston, Giorgio Keppel, Yury Kolomensky, Alexander Leder, Carlo Ligi, Yu-Gang Ma, Laura Marini, Maria Martinez, Reina Maruyama, Yuan Mei, Niccolo Moggi, Silvio Morganti, Tommaso Napolitano, Massimiliano Nastasi, Claudia Nones, Eric Norman, Valentina Novati, Angelo Nucciotti, Irene Nutini, Thomas O’Donnell, Jonathan Ouellet, Carmine Pagliarone, Marco Pallavicini, Luca Pattavina, Maura Pavan, Gianluigi Pessina, Valerio Pettinacci, Cristian Pira, Stefano Pirro, Stefano Pozzi, Ezio Previtali, Andrei Puiu, Carl Rosenfeld, Claudia Rusconi, Michinari Sakai, Samuele Sangiorgio, Benjamin Schmidt, Nick Scielzo, Vivek Singh, Monica Sisti, Danielle Speller, Luca Taffarello, Francesco Terranova, Claudia Tomei, Marco Vignati, Sachinthya Wagaarachchi, Barbara Wang, Bradford Welliver, Jeffrey Wilson, Kevin Wilson, Lindley Winslow, Tom Wise, Luigi Zanotti, Sergio Zimmermann, Stefano Zucchelli
Faculty Publications
The Cryogenic Underground Observatory for Rare Events (CUORE) is the first bolometric experiment searching for neutrinoless double beta decay that has been able to reach the 1-ton scale. The detector consists of an array of 988 TeO2 crystals arranged in a cylindrical compact structure of 19 towers, each of them made of 52 crystals. The construction of the experiment was completed in August 2016 and the data taking started in spring 2017 after a period of commissioning and tests. In this work we present the neutrinoless double beta decay results of CUORE from examining a total TeO2 exposure of 86.3kgyr …
Louisiana Tech University Department Of Physics Astronomical Observatory Collection,
2019
Louisiana Tech University
Louisiana Tech University Department Of Physics Astronomical Observatory Collection, University Archives And Special Collections, Prescott Memorial Library, Louisiana Tech University
Manuscript Finding Aids
Correspondence relating to establishing an astronomical observatory at Louisiana Tech University, 1963-1970, and undated constitution of the Louisiana Tech Astronomical Society.
Identified Flying Objects: A Multidisciplinary Scientific Approach To The Ufo Phenomenon,
2019
Montana Tech
Identified Flying Objects: A Multidisciplinary Scientific Approach To The Ufo Phenomenon, Dr. Michael P. Masters
Interdisciplinary Arts and Sciences Books
Identified Flying Objects cautiously examines the premise that ‘UFOs’ & ‘Aliens’ are simply our distant human descendants, returning from the future to study their own hominin evolutionary past. This text challenges readers to consider new possibilities while cultivating conversations about our ever-evolving understanding of time & time travel.
Analytic Modeling Of Eccentric Binary Black Holes : From Inspiral To Merger,
2019
Marshall University
Analytic Modeling Of Eccentric Binary Black Holes : From Inspiral To Merger, Dillon Paige Buskirk
Theses, Dissertations and Capstones
The orbital evolution of black hole binaries is described by two main phases: the inspiral and the merger. Using the post-Newtonian (PN) theory for the inspiral phase of the binary, we build up a Mathematica script to obtain strain waveforms for the inspiral. We expand our previous inspiral formulation to include eccentric orbits, which greatly complicates the calculations. Since this model breaks down as the two bodies approach merger, a separate model for the merger and ring-down is required. This part of the evolution is highly non-linear and numerical relativity (NR) is required to simulate this problem. However, this is …
Gwtc-1: A Gravitational-Wave Transient Catalog Of Compact Binary Mergers Observed By Ligo And Virgo During The First And Second Observing Runs,
2019
LIGO, California Institute of Technology
Gwtc-1: A Gravitational-Wave Transient Catalog Of Compact Binary Mergers Observed By Ligo And Virgo During The First And Second Observing Runs, B. P. Abbott
Faculty & Staff Scholarship
We present the results from three gravitational-wave searches for coalescing compact binaries with component masses above 1 M⊙ during the first and second observing runs of the advanced gravitationalwave detector network. During the first observing run (O1), from September 12, 2015 to January 19, 2016, gravitational waves from three binary black hole mergers were detected. The second observing run (O2), which ran from November 30, 2016 to August 25, 2017, saw the first detection of gravitational waves from a binary neutron star inspiral, in addition to the observation of gravitational waves from a total of seven binary black hole mergers, …
Ua66/11/1 Ogden College Of Science & Engineering Physics & Astronomy Publications,
2019
Western Kentucky University
Ua66/11/1 Ogden College Of Science & Engineering Physics & Astronomy Publications, Wku Archives
WKU Archives Collection Inventories
Publications by and about the Department of Physics and Astronomy.
Ua1c2/36 Hardin Planetarium Photos,
2019
Western Kentucky University
Ua1c2/36 Hardin Planetarium Photos, Wku Archives
WKU Archives Collection Inventories
Images of Hardin Planetarium
The Dark Sky Character Of Archaeological Landscapes: Cultural Meaning And Conservation Strategies,
2019
Technological University Dublin
The Dark Sky Character Of Archaeological Landscapes: Cultural Meaning And Conservation Strategies, Frank Prendergast
Book/Book Chapter
This paper presents the first ever study of light pollution at selected Irish prehistoric archaeological landscapes. The concepts of cosmology and landscape are first briefly described and followed by a summary of early human settlement of the island. Building on this, the extant corpus of early prehistoric megalithic burial tombs is illustrated to show their contrasting distribution patterns and typology. Analysis of tomb locations using nearest-neighbour statistical methods reveals evidence of intentional clustering. Further geo-statistical analysis identifies the geographical locations and the density ranking of these nucleated clusters - a feature especially evident in the passage tomb tradition on this …
Principal Component Analysis Of The Magnetic Transition In The Three-Dimensional Fermi-Hubbard Model,
2019
San Jose State University
Principal Component Analysis Of The Magnetic Transition In The Three-Dimensional Fermi-Hubbard Model, Ehsan Khatami
Faculty Publications
Machine learning techniques have been widely used in the study of strongly correlated systems in recent years. Here, we review some applications to classical and quantum many-body systems and present results from an unsupervised machine learning technique, the principal component analysis, employed to identify the finite-temperature phase transition of the three-dimensional Fermi-Hubbard model to the antiferromagnetically ordered state. We find that this linear method can capture the phase transition as well as other more complicated and nonlinear counterparts.
Gemini,
2019
Parkland College
Gemini, Michael Dalton
Natural Sciences Student Research Presentations
This poster for the Natural Sciences Poster Session at Parkland College features the constellation Gemini, including a calculation of the change in rise time to determine the length of a year, determining the life span of the major stars in the constellation, identifying Messier objects within the region as well as the mythology behind the name of the constellation.
Spacetime Groups,
2019
[email protected]
Spacetime Groups, Ian M. Anderson, Charles G. Torre
Publications
A spacetime group is a connected 4-dimensional Lie group G endowed with a left invariant Lorentz metric h and such that the connected component of the isometry group of h is G itself. The Newman-Penrose formalism is used to give an algebraic classification of spacetime groups, that is, we determine a complete list of inequivalent spacetime Lie algebras, which are pairs (g,η), with g being a 4-dimensional Lie algebra and η being a Lorentzian inner product on g. A full analysis of the equivalence problem for spacetime Lie algebras is given which leads to a completely algorithmic solution to the …
Ua66/11/3 Ogden College Of Science & Engineering Physics & Astronomy Student Organizations,
2019
Western Kentucky University
Ua66/11/3 Ogden College Of Science & Engineering Physics & Astronomy Student Organizations, Wku Archives
WKU Archives Collection Inventories
Records created by and about student organizations associated with the Physics and Astronomy.
Ua66/12 Ogden College Of Science & Engineering Hardin Planetarium,
2019
Western Kentucky University
Ua66/12 Ogden College Of Science & Engineering Hardin Planetarium, Wku Archives
WKU Archives Collection Inventories
Records created by and about the Hardin Planetarium.
Ua66/11/2 Ogden College Of Science & Engineering Physics & Astronomy Administration,
2019
Western Kentucky University
Ua66/11/2 Ogden College Of Science & Engineering Physics & Astronomy Administration, Wku Archives
WKU Archives Collection Inventories
Records created by and about the administration of Physics and Astronomy.
