Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 129 for “"Astrophysics and Astronomy"”.
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The dynamical state of a young stellar cluster
… stages of star formation, in this case, Class I and Flat spectrum objects, and compared with a sample of Class II and III objects from the same embedded cluster. It is found that the radial velocity dispersion for these younger objects is Δv = 2.8 ± 0:6 km s<sup>-1</sup> which is about 2σ …
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NEW GRAVITATIONAL INTERACTIONS IN COSMOLOGY —- FROM EFFECTIVE FIELD THEORY TO OBSERVATION
… data from radically different cosmic epochs, and proposing a theoretical model that suggests an interaction between neutrinos and gravity could help alleviate this tension. I then turn to more formal considerations of Effective Field Theories (EFTs) in cosmology. In particular, I show how to …
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MINERVA-RED: A TELESCOPE DEDICATED TO THE DISCOVERY OF NEARBY PLANETS
… other stars in the Milky Way. Today, thousands of these exoplanets are known, many detected through the subtle acceleration of a host star imparted by its orbiting planet(s). As the measurement techniques that are used to detect exoplanets through these stellar velocity variations have …
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Spectroscopic and spectro-astrometric analysis of T Tauri Stars
"To understand our own solar origins, we must investigate the composition of the protoplanetary disk from which the solar system formed. To infer this, we study analogs to the early solar system called T Tauri stars. These objects are low-mass, pre-main sequence stars surrounded by circumstellar …
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DESIGN, CONSTRUCTION, AND SCIENCE FORECASTS FOR THE TERAHERTZ INTENSITY MAPPER
… Building on the flight heritage of the BLAST and SPIDER balloon programs, TIM will wield sub-arcsecond pointing reconstruction to create a 4-D tomographic map of the redshifted [CII] emission line over the GOODS-South/Chandra deep field at ∼ 0.2 square degrees across a redshift range 0.5 ≲ z ≲ …
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Observations and Light Curve Analysis of Transiting Extra-Solar Planets
… process to determining physical characteristics and orbital properties. The research was conducted with two telescopes of different sizes (16” and 12”) at multiple sites in order to refine the detection process. Both Maxim DL and Mira Pro x64 software were used to process the resulting images. …
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Binary Neutron Star Mergers: Gravitational-wave Measurements of Their Parameters and the Nuclear Equation of State
… binary mergers. Two of these signals, GW170817 and GW190425, were identified as binary neutron star mergers. As detector sensitivity improves we expect to see many more binary neutron star merger events, both from future observing runs of the LIGO-Virgo network and from planned third-generation …
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Analysis and Comparison of Three Acoustic Energy Density Probes
… signal which can be recorded, displayed, and so forth. The squared sound pressure is directly related to potential energy density. Consequently, the measurement of sound pressure alone does not inherently provide insight into the total energy density of the sound field. Specifically, no …
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Optical Tracking and Spectral Characterization of Cubesats for Operational Missions
… to operational satellites from the government and commercial sector. With an uptick in worldwide satellite launches and the growing adoption of the CubeSat standard, the number of small objects in orbit are increasing at a faster pace than ever. As a result, a cascading collision event seems …
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Optical Emissions Generated During Ionospheric Heating
… atmosphere, stimulates a large number of linear and non-linear wave-plasma interactions. One outcome of these interactions is the acceleration of thermal ionospheric electrons, leading to the production of induced optical emissions. Detection of these emissions yields information regarding …
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An Analysis of Undergraduate Introductory Astronomy Syllabi from Physics and Astronomy Departments
… analysis of undergraduate level introductory astronomy syllabi. The researcher focused only on introductory astronomy courses offered by physics or astronomy departments in the United States of America. The course syllabus is a document worthy of study for two primary reasons: 1) Its role as a …
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