Near-Infrared (2 – 4 Micron) Spectroscopy Of Near-Earth Asteroids: A Search For Oh/H2o On Small Planetary Bodies, 2015 University of Tennessee - Knoxville
Near-Infrared (2 – 4 Micron) Spectroscopy Of Near-Earth Asteroids: A Search For Oh/H2o On Small Planetary Bodies, Nathanael Richard Wigton
Masters Theses
Near-Earth asteroids (NEAs) are not expected to have H2O [water] ice on their surfaces because a) most accreted dry and therefore never contained H2O, and b) their relatively high surface temperatures should drive rapid H2O ice sublimation. However, OH/H2O has been detected on other anhydrous inner solar system objects, including the Moon and Vesta. Possible sources for OH/H2O in the inner Solar System might include production via solar wind interactions, carbonaceous chondrite or cometary impact delivery, or native OH/H2O molecules bound to phyllosilicates. As these processes are active …
Detecting Cosmic Rays Using Cemos Sensors In Consumer Devices, 2015 Iowa State University
Detecting Cosmic Rays Using Cemos Sensors In Consumer Devices, Matthew M. Plewa
2017 Academic High Altitude Conference
Since the time of Victor Hess and his balloon flight that demonstrated that cosmic rays increased with altitude, new detection methods have become widely available to be used on current day flights. One such method is to utilize CCDs with long duration exposures. During the exposures the CCD is exposed to cosmic rays which then leave a track. This phenomenon is caused by the CCD's inability to distinguish between photons of light and charged particles. Such tracks can then be separated from the CCD's background noise and classified.
Optimization Of A Solar Simulator For Planetary-Photochemical Studies, 2015 Paul Scherrer Institute (PSI)
Optimization Of A Solar Simulator For Planetary-Photochemical Studies, Et-Touhami Es-Sebbar, Yves Bénilan, Nicolas Fray, Hervé Cottin, Antoine Jolly, Marie-Claire Gazeau
Dr. Et-touhami Es-sebbar
Low-temperature microwave-powered plasma based on hydrogen and hydrogen with noble gas mixtures are widely used as a continuous vacuum ultraviolet (VUV) source in laboratory experiments carried out to mimic the photochemistry in astrophysical environments. In this work, we present a study dedicated to optimizing such sources in terms of mono-chromaticity at Lyα (H(Lyα) line at 121.6 nm ~ 10.2 eV) and high spectral irradiance. We report the influence on the emission spectrum of a wide range of experimental conditions including gas composition (pure H2, pure He, and H2/He mixture), gas pressure, flow rates, and microwave power. The absolute spectral irradiance …
Search For Life, 2015 University at Albany, State University of New York
Search For Life, John W. Delano Phd
Atmospheric and Environmental Science Faculty Scholarship
NASA's Astrobiology program seeks to determine the origin and distribution of life in the Milky Way galaxy using scientific expertise from many disciplines (e.g., astronomy, biochemistry, geochemistry). This presentation, which provides an overview of the progress that has been made in this effort, was delivered on 23 June 2015 at the Green Mountain Academy for Lifelong Learning in Manchester, VT. With NASA's development of the Space Launch System (SLS), vigorous multi-disciplinary scientific research, and additional spacecraft (e.g., TESS) for finding and analyzing planets orbiting other stars, exciting discoveries will continue.
Book Review: The Scientific Exploration Of Venus, 2015 Embry-Riddle Aeronautical University
Book Review: The Scientific Exploration Of Venus, T. D. Oswalt
Publications
This document is Dr. Oswalt’s review of The Scientific Exploration of Venus, by Fredric W. Taylor. Cambridge, 2014 295p bibl index, 9781107023482 $48.00
Investigating The Correlation Between Inclination Of Coronal Loops And Solar Flare Activity, 2015 Central Washington University
Investigating The Correlation Between Inclination Of Coronal Loops And Solar Flare Activity, John-Paul Mann
Symposium Of University Research and Creative Expression (SOURCE)
The purpose of this research is to investigate changes in the coronal loop structures during the life cycle of a solar flare. Coronal loops are intricate and complicated magnetic features on the solar surface that are the source of large solar flares. Understanding the dynamics of these coronal loops provides better models for predicting solar flare activity. By obtaining the magnetogram, or magnetic field strength, along with the inclination of these coronal loops, the full structure of the coronal loop can be obtained. Therefore, we studied how the coronal loops inclination angle, as it emerges from the photosphere, changes in …
Predicting Solar Sigmoid Lifetimes Based On Shearing In The Photosphere, 2015 Central Washington University
Predicting Solar Sigmoid Lifetimes Based On Shearing In The Photosphere, Austen Stone
Symposium Of University Research and Creative Expression (SOURCE)
This project’s purpose was to study how the speed at which the plasma in the photosphere of the sun affects the lifetime and shape of a solar sigmoid. Solar sigmoids are S-shaped, twisted magnetic structures that are due to the shifting magnetic field lines emerging from the surface of the sun. The photosphere is the visible layer of the sun’s surface and is made up of cells of plasma that are highly conductive and influenced by the magnetic field of the sun. Sigmoids form when shearing (a lateral shift between two objects in directions opposite each other) occurs in the …
Physical Records Of Impacts In The Early And Modern Solar System, 2015 University of Arkansas, Fayetteville
Physical Records Of Impacts In The Early And Modern Solar System, Robert Ellis Beauford
Graduate Theses and Dissertations
The study of terrestrial meteorite impact craters and of impacted meteorites expands our understanding of cratered rocky surfaces throughout the solar system. Terrestrial craters uniquely expand upon data from remote imaging and planetary surface exploration by providing analogs for understanding the buried sub-surface portions of impact structures, while impacted meteorites provide examples of a much wider range of surface and subsurface impactite materials than we can directly sample thus far through solar system exploration.
This report examines three facets of the impact record preserved in terrestrial impact craters and in meteorites. First, it looks at the macroscopic structure of the …
A Statistical Study Into The Spatial Distribution And Dawn-Dusk Asymmetry Of Dayside Magnetosheath Ion Temperatures As A Function Of Upstream Solar Wind Conditions, 2015 Aalto University
A Statistical Study Into The Spatial Distribution And Dawn-Dusk Asymmetry Of Dayside Magnetosheath Ion Temperatures As A Function Of Upstream Solar Wind Conditions, A. P. Dimmock, K. Nykyri, H. Karimabadi, A. Osmane, T. I. Pulkkinen
Publications
The magnetosheath contains the shocked solar wind and behaves as a natural filter to the solar wind plasma before it reaches the magnetosphere. The redistribution of kinetic energy at the bow shock results in significant thermalization of the solar wind plasma, resulting in a magnetosheath temperature profile which is highly nonhomogeneous and nonisotropic and differs between the dawn and dusk flanks. The present study attempts to study the spatial distribution of magnetosheath ion temperature as a function of upstream solar wind conditions. We pay particular attention to the dawn/dusk asymmetry in which we attempt to quantify using experimental data collected …
Revisiting Ulysses Observations Of Interstellar Helium, 2015 Naval Research Laboratory
Revisiting Ulysses Observations Of Interstellar Helium, Brian E. Wood, Hans-Reinhard Müller, Manfred Witte
Dartmouth Scholarship
We report the results of a comprehensive reanalysis of Ulysses observations of interstellar He atoms flowing through the solar system, the goal being to reassess the interstellar He flow vector and to search for evidence of variability in this vector. We find no evidence that the He beam seen by Ulysses changes at all from 1994-2007. The direction of flow changes by no more than ~03 and the speed by no more than ~0.3 km s–1. A global fit to all acceptable He beam maps from 1994-2007 yields the following He flow parameters: V ISM = 26.08 ± …
Assessing Predictive Ability Of Three Auroral Precipitation Models Using Dmsp Energy Flux, 2015 Air Force Institute of Technology
Assessing Predictive Ability Of Three Auroral Precipitation Models Using Dmsp Energy Flux, Cory T. Lane, Ariel O. Acebal, Yihua Zheng
Faculty Publications
Our study statistically compares the total energy flux outputs of Newell et al.'s (2010a) oval variation, assessment, tracking, intensity, and online nowcasting (OVATION) Prime model, Hardy et al.'s (1991) Kp‐based model, and a coupled Space Weather Modeling Framework ring current model to energy flux data obtained from 2198 Defense Meteorological Satellite Program (DMSP) satellite passes in the Northern Hemisphere. Our DMSP data set includes 28 days grouped into continuous 3 and 4 day periods between 2000 and 2008 and encompasses magnetic local times (MLTs) between 04:00 and 21:00. We obtain the most equatorward magnetic latitude coordinate, where a DMSP satellite …
Empyreal Radiance: An Application Of Sonification In The Field Of Astrophysics, 2015 Otterbein University
Empyreal Radiance: An Application Of Sonification In The Field Of Astrophysics, Ryan Loth
Undergraduate Distinction Papers
Broadly, this paper discusses the application of sonification and its potential for increasing knowledge. The paper is broken up into three sections: the theory of sonification, sonification for artistic purposes, and lastly an extensive look at one process of sonification dealing with solar winds in space. Concerning the theory of sonification, the paper will divulge into the process of sonification and ask questions about the limitations of it as well. The second section discusses how sonification is a way to build the curiosity of not just scientists, but also the general public. The final section addresses my composition Empyreal Radiance …
Feldspathic Rocks On Mars: Compositional Constraints From Infrared Spectroscopy And Possible Formation Mechanisms, 2015 SUNY Stony Brook
Feldspathic Rocks On Mars: Compositional Constraints From Infrared Spectroscopy And Possible Formation Mechanisms, Deanne Rogers, Hanna Nekvasil
Department of Geosciences Faculty Publications
Rare feldspar-dominated surfaces on Mars were previously reported based on near-infrared (NIR) spectral data and were interpreted to consist of anorthosite or felsic rocks. Using thermal infrared (TIR) data over the feldspar detections with the largest areal extent in Nili Patera and Noachis Terra, we rule out felsic interpretations. Basaltic or anorthositic compositions are consistent with TIR measurements, but the geologic contexts for these regions do not support a plutonic origin. Laboratory NIR spectral measurements demonstrate that large plagioclase crystals (>~840 μm) can be detected in mixtures with as much as 50 vol % mafics, which is higher than …
Experimental Simulations Of Recurring Slope Lineae On The Surface Of Mars, 2015 Connecticut College
Experimental Simulations Of Recurring Slope Lineae On The Surface Of Mars, Elizabeth Eddings
Physics, Astronomy and Geophysics Honors Papers
Recurring Slope Lineae (RSL) are active surface features found on rocky Martian slopes commonly in the southern hemisphere equatorial to mid-latitude regions. These low albedo, dark streaks on Mars demonstrate seasonal characteristics;; they appear and grow darker and longer in warm months and fade to possible disappearance in colder months. One proposed mechanism for the formation and evolution of these features by McEwen et al. (2011) is the melting of subsurface water on Mars. The goal of this study was to test this hypothesis by reconstructing features similar to RSL in the lab that display the same seasonal …
Study Solar Activity In The Backside Of The Sun With The Stereo Mission, 2015 University of Alabama in Huntsville
Study Solar Activity In The Backside Of The Sun With The Stereo Mission, Catherine A. Gibbs
Summer Community of Scholars Posters (RCEU and HCR Combined Programs)
No abstract provided.
The Formation Of The Trajectories Of The Planets Of The Solar System, 2015 Yanbikov Vildyan Shavkyatovich
The Formation Of The Trajectories Of The Planets Of The Solar System, Vildyan Yanbikov
Vildyan Yanbikov
Процесс превращения круговой орбите планеты по эллиптической. Процесс превращения эллиптической орбите вокруг Солнца (прецессия перигелия планеты).
An Economic Analysis Of Mars Exploration And Colonization, 2015 DePauw University
An Economic Analysis Of Mars Exploration And Colonization, Clayton Knappenberger
Honor Scholar Theses
No abstract provided.
Interdisciplinary Connections Between Science & Theatre, 2015 Virginia Commonwealth University
Interdisciplinary Connections Between Science & Theatre, Jessica N. Dotson
Theses and Dissertations
Abstract
INTERDISCIPLINARY CONNECTIONS BETWEEN SCIENCE & THEATRE
Jessica Nicole Dotson
A thesis submitted in partial fulfillment of the requirements for the degree of Master of Fine Arts at Virginia Commonwealth University.
Virginia Commonwealth University, 2015.
Major Director: Dr. Noreen C. Barnes, Director of Graduate Studies, Associate Professor of Theatre
In the 1990s, astronomer Peter Usher was searching for new ways to teach his introductory astronomy class at Pennsylvania State University. He began to engage his students by searching for astronomical connections from other disciplines. His focus was turned to the arts, especially the works of William Shakespeare. Usher found, while …
Unmatter Plasma, Relativistic Oblique-Length Contraction Factor, Neutrosophic Diagram And Neutrosophic Degree Of Paradoxicity: Articles And Notes, 2015 University of New Mexico
Unmatter Plasma, Relativistic Oblique-Length Contraction Factor, Neutrosophic Diagram And Neutrosophic Degree Of Paradoxicity: Articles And Notes, Florentin Smarandache
Branch Mathematics and Statistics Faculty and Staff Publications
This book has four parts. In the first part, we collected five recent papers, published before in Progress in Physics, but reviewed. In the first paper, we approach a novel form of plasma, Unmatter Plasma. The electron-positron beam plasma was generated in the laboratory in the beginning of 2015. This experimental fact shows that unmatter, a new form of matter that is formed by matter and antimatter bind together (mathematically predicted a decade ago) really exists. That is the electron-positron plasma experiment of 2015 is the experimentum crucis verifying the mathematically predicted unmatter. In the second paper, we generalize the …
Spectral Evolution Of Energetic Neutral Atom Emissions At The Heliospheric Poles As Measured By Ibex During Its First Three Yeras, 2014 Southwest Research Institute
Spectral Evolution Of Energetic Neutral Atom Emissions At The Heliospheric Poles As Measured By Ibex During Its First Three Yeras, M. Dayeh, F. Allegrini, R. Demajistre, M. I. Desai, R. W. Ebert, S. A. Fuselier, Paul H. Janzen, G. Livadiotis, D. J. Mccomas, Daniel B. Reisenfeld, N. A. Schwadron, M. Siewert
Physics and Astronomy Faculty Publications
The Interstellar Boundary Explorer (IBEX) mission continues to measure energetic neutral atom (ENA) emissions produced by charge exchange between solar wind (SW) protons and interstellar neutrals at the edge of our heliosphere. Using the first 3 yr of IBEX-Hi ENA measurements (2009-2011), we examined the spectral evolution of ~0.5-6 keV ENAs at the polar regions (above 60°). We found the following: (1) pixels with a characteristic "ankle" spectra (lower spectral index at higher energies) increase by ~5% in 2010 and ~10% in 2011 compared to 2009. (2) The averaged spectral index in 2011 is smaller than that of 2009. (3) …