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Articles 1 - 30 of 56
Full-Text Articles in Physics
Modeling Spiral Galaxy Surface Luminosity To Explain Non-Uniform Inclination Distributions, Jordan C. Rozum, Shane L. Larson
Modeling Spiral Galaxy Surface Luminosity To Explain Non-Uniform Inclination Distributions, Jordan C. Rozum, Shane L. Larson
Jordan Rozum
The distribution of spiral and bar galaxy inclination angles is expected to be uniform. However, analysis of several major galaxy catalogs shows this is not the case; galaxies oriented near edge-on are significantly more common in these catalogs. In an attempt to explain this discrepancy, we have developed a galaxy simulation code to compute the appearance of a spiral type galaxy as a function of its morphological parameters. We examine the dependence of observed brightness upon inclination angle by using smooth luminous mass density and ISM density distributions. The luminous component is integrated along a particular line of sight, thus …
Characterizing Sky Variability For Multi-Messenger Astronomy, Rachel K. Nydegger, Shane L. Larson Ph.D.
Characterizing Sky Variability For Multi-Messenger Astronomy, Rachel K. Nydegger, Shane L. Larson Ph.D.
Rachel Nydegger Rozum
Multi-messenger astronomy employs both electromagnetic and gravitational -wave detectors to paint a richer picture of celestial objects, providing more depth and information. The interferometers utilized for gravitational-wave observations receive input from very broad fields of view on the sky, typically a few square degrees. To have simultaneous electromagnetic observations (typically less than one square degree) requires innovative techniques for the telescopes to find the origin of radiation. One idea is to “tile” the view of the interferometer, using multiple telescopes to simultaneously point at different areas of the field to observe the source. One di"culty of this observing paradigm is …
Mapping Light Pollution At Utah State University, Rachel K. Nydegger, Shane L. Larson Ph.D.
Mapping Light Pollution At Utah State University, Rachel K. Nydegger, Shane L. Larson Ph.D.
Rachel Nydegger Rozum
One of the beauties of modern civilization is seeing the city lighting at night. It provides a feeling of security and is indicative of the power and endeavors of humanity, but over-lighting is a form of pollution. Many outdoor light fixtures spread light in all directions, sending a majority of the light into the sky, away from where we want the light to be on the ground. This light spreading upward is not only wasted light, but it is wasted energy and money, destroys our ability to view the night sky, and has profound effects on nocturnal creatures. The direct …
Galaxy Inclination And Surface Brightness, Jordan C. Rozum, Shane L. Larson
Galaxy Inclination And Surface Brightness, Jordan C. Rozum, Shane L. Larson
Jordan Rozum
The distribution of spiral and bar galaxy inclination angles is expected to be uniform. However, analysis of several major galaxy catalogs shows this is not the case; galaxies oriented near edge-on are significantly more common in these catalogs. In an attempt to explain this discrepancy, we have developed a galaxy simulation code to compute the appearance of a spiral type galaxy as a function of its morphological parameters. We examine the dependence of observed brightness upon inclination angle by using smooth luminous mass density and interstellar medium (ISM) density distributions. The luminous mass component is integrated along a particular line …
Universe Galaxy Contraction, Struck Force Table New Forces, New Universes, New Elements, Sociological Implications, James T. Struck
Universe Galaxy Contraction, Struck Force Table New Forces, New Universes, New Elements, Sociological Implications, James T. Struck
James T Struck
Universe Galaxy Contraction, Struck Force Table and New Forces, New More Charged Universe and In Between Universe, 12 New Chemical Elements-Universe galaxy contraction is supported by quasar blueshift of some material, Andromeda Galaxy movement towards the Milky Way, blazar movement towards Earth, Earth, galaxy movement towards the Great Attractor, Hydra Centaurus and Shapley Supercluster and some evidence of Virgo Cluster movement at a 250-300 km/s rate. Contraction might be happening at a lesser rate than expansion, but contraction of the Universe and galaxies may effect our Earth before expansion affects us. From a sociological viewpoints, Universe galaxy contraction is something …
Relativistic Solution Of The N-Body Problem (Ii), Jorge A. Franco
Relativistic Solution Of The N-Body Problem (Ii), Jorge A. Franco
Jorge A Franco
This work is the continuation of the classical approach described in previous paper for constant masses. In here the solution of the movement of a group of N gravitationally attracting bodies around its center of mass CM, given their initial positions and velocities, is developed for variable masses under the Theory of Vectorial Relativity. The strategy of realizing special physical characteristics of forces on the the CM and properties of the reduced mass in the solution of the two-body problem, allowed extending the Newton’s Universal Gravitation Law for applying to two or more attracting bodies, and also allowed operating on …
N-Body Problem’S Global Solution I. Classical Approach, Jorge A. Franco
N-Body Problem’S Global Solution I. Classical Approach, Jorge A. Franco
Jorge A Franco
The prediction of the movement of a group of N gravitationally attracting bodies around its center of mass CM, given their initial positions and velocities, is what has been called the N-body problem, since Isaac Newton formulated it in his magnum work Phylosophiae Naturalis Principia Mathematica, commonly known as his "Principia" published in 1667. So far it has only been fully resolved (Johan Bernoulli in 1710) the problem of two bodies from the classical view, using Newton's laws. For N>2 in some cases only approximate, or not general, solutions exist. In this work the strategy of realizing physical properties …
Unmasking The Mysteries Of High-Mass X-Ray Binaries (Hmxbs): The Role Of The Electron Beam Ion Trap (Ebit), Carey L. Baxter, Greg Brown, Natalie Hell
Unmasking The Mysteries Of High-Mass X-Ray Binaries (Hmxbs): The Role Of The Electron Beam Ion Trap (Ebit), Carey L. Baxter, Greg Brown, Natalie Hell
Carey L Baxter
The Electron Beam Ion Trap (EBIT) uses a very narrow electron beam (~60μm) to excite and trap ions. X-ray emissions of the excited ions are then diffracted and analyzed. I studied specific spectral emission lines of ionized silicon. This data can be used as a point of reference for similar spectra measured by the satellite Chandra so that the Doppler shift due to wind around the accretion disks of High Mass X-ray Binaries (HMXBs) can be calculated. HMXBs are pairs of stars that are luminous in X-rays. They are composed of a donor star that gives up mass to an …
Essentials Of The Theory Of Abstraction - Lecture, Subhajit Kumar Ganguly
Essentials Of The Theory Of Abstraction - Lecture, Subhajit Kumar Ganguly
Subhajit Kumar Ganguly
In not favouring solutions or sets of solutions, the principle of zero-postulation drives away any unwanted incompleteness from the description of the world. It is the interactions between the possible exhaustive set of solutions that creates the impression pointedness or directiveness in the universe, leading to the formation of clusters, as discussed earlier. These interactions may be chaotic in nature, giving rise to attractor points where the directiveness inside any given system asymptotically seem to approach. It is this directiveness, in turn, inside a given system or in the universe as a whole, that is the cause of all known …
Environmental Research With Undergraduates In East Asia: Collaborations In China And Japan, Gary A. Morris, Jon Schoer
Environmental Research With Undergraduates In East Asia: Collaborations In China And Japan, Gary A. Morris, Jon Schoer
Gary A. Morris
China: From 2007-2008 as part of a collaborative research project funded by the ASIANetwork, VU and the VLACD, 5 VU students (2 chemistry, 1 biology, 1 environmental science, and 1 civil engineering) spent 3 weeks in Zhejiang province, China and 7 additional weeks in northwest Indiana comparing and contrasting water quality issues and attitudes in the two regions. While in China, the students interacted with one another and graduate students, faculty, and staff from Zhejiang University and Zhejiang A &F University, and with multiple local & regional officials and residents to collect water quality data and opinions about key water …
The M81 Group Dwarf Irregular Galaxy Ddo165. Ii. Connecting Recent Star Formation With Ism Structures And Kinematics, John M. Cannon, Hans P. Most, Evan D. Skillman, Daniel R. Weisz, David Cook, Andrew E. Dolphin, Robert C. Kennicutt, Jr., Janice Lee, Anil Seth, Fabian Walter, Steven R. Warren
The M81 Group Dwarf Irregular Galaxy Ddo165. Ii. Connecting Recent Star Formation With Ism Structures And Kinematics, John M. Cannon, Hans P. Most, Evan D. Skillman, Daniel R. Weisz, David Cook, Andrew E. Dolphin, Robert C. Kennicutt, Jr., Janice Lee, Anil Seth, Fabian Walter, Steven R. Warren
John Cannon
No abstract provided.
Relativistic Gravitational Potential Energy And General Free Fall: A Fundamental Topic In Physics, Jorge A. Franco
Relativistic Gravitational Potential Energy And General Free Fall: A Fundamental Topic In Physics, Jorge A. Franco
Jorge A Franco
In this paper, we derived expressions of the relativistic potential energy for radial, circular and general curvilinear motion of a mass under the influence of a gravitational field, and the equivalence relationship between velocity and radius in each case. Also it was obtained the influence of altitude on time, mass, length and other physical magnitudes for circular and general curvilinear motion, and for the static case or radial.
Relativistic Analysis Of Doppler Effect And Aberration Based On Vectorial Lorentz Transformations, Jorge A. Franco
Relativistic Analysis Of Doppler Effect And Aberration Based On Vectorial Lorentz Transformations, Jorge A. Franco
Jorge A Franco
In this paper, we derived more general and correct expressions for the Relativistic Doppler and Aberration effect.
The Evolution Of Stellar Structures In Dwarf Galaxies, N. Bastian, D. R. Weisz, E. D. Skillman, K.B. W. Mcquinn, A. E. Dolphin, R. A. Gutermuth, John M. Cannon, B. Ercolano, M. Gieles, R. C. Kennicutt, F. Walter
The Evolution Of Stellar Structures In Dwarf Galaxies, N. Bastian, D. R. Weisz, E. D. Skillman, K.B. W. Mcquinn, A. E. Dolphin, R. A. Gutermuth, John M. Cannon, B. Ercolano, M. Gieles, R. C. Kennicutt, F. Walter
John Cannon
No abstract provided.
Ozone Profile Observations In Houston, Texas (1994 - 2010) From Aircraft, Balloons, And Satellites, Gary A. Morris, Barry Lefer, Bernhard Rappenglueck, Christine Haman, Christopher Boxe, Scott Hersey, Valerie Thouret, Jean-Pierre Cammas, Bryan Johnson, Samuel Oltmans
Ozone Profile Observations In Houston, Texas (1994 - 2010) From Aircraft, Balloons, And Satellites, Gary A. Morris, Barry Lefer, Bernhard Rappenglueck, Christine Haman, Christopher Boxe, Scott Hersey, Valerie Thouret, Jean-Pierre Cammas, Bryan Johnson, Samuel Oltmans
Gary A. Morris
Houston, Texas has long been an urban area plagued with high levels of surface ozone, particularly in spring and late summer. The combination of a large commuter population and one of the largest concentrations of petrochemical plants in the world results in abundant and nearly co-located sources of NOx and hydrocarbons. The location of Houston on the South Coast of the United States in a subtropical climate results in meteorological conditions that favor ozone production. Using MOZAIC (1994 - 2004), ozonesonde (2000, 2004 - 2010), and TES (2005 – 2010) data, we examine the evolution of ozone profiles over Houston …
Condensation States And Landscaping With The Theory Of Abstraction, Subhajit Kumar Ganguly
Condensation States And Landscaping With The Theory Of Abstraction, Subhajit Kumar Ganguly
Subhajit Kumar Ganguly
The Abstraction theory is applied in landscaping. A collection of objects may be made to be vast or meager depending upon the scale of observations. This idea may be developed to unite the worlds of the great vastness of the universe and the minuteness of the sub-atomic realm. Keeping constant a scaling ratio for both worlds, these may actually be converted into two self-same representatives with respect to scaling. The Laws of Physical Transactions are made use of to study Bose-Einstein condensation. As the packing density of concerned constituents increase to a certain critical value, there may be evolution of …
Abstraction In Theory - Laws Of Physical Transactions, Subhajit Kumar Ganguly
Abstraction In Theory - Laws Of Physical Transactions, Subhajit Kumar Ganguly
Subhajit Kumar Ganguly
Considering transport or tendency of transport of physical entities from an initial to a final point,we come to a similar basis of understanding of various physical phenomena.The trajectory-behaviour of such transport represents the effect or field of influence.This way,we may explain cluster-formation in the universe,an expanding universe,etc.This may also lead to a similar basis for understanding the four non-contact forces of nature.Also,for different ranges of acceleration in the field formed in spacetime,we have different properties of matter interacting.This may explain the difference in ranges of the various forces.
The M81 Group Dwarf Irregular Galaxy Ddo165. I. High Velocity Neutral Gas In A Post-Starburst System, John M. Cannon, Hans P. Most, Evan D. Skillman, Daniel R. Weisz, David Cook, Andrew E. Dolphin, Robert C. Kennicutt, Jr., Janice Lee, Anil Seth, Fabian Walter, Steven R. Warren
The M81 Group Dwarf Irregular Galaxy Ddo165. I. High Velocity Neutral Gas In A Post-Starburst System, John M. Cannon, Hans P. Most, Evan D. Skillman, Daniel R. Weisz, David Cook, Andrew E. Dolphin, Robert C. Kennicutt, Jr., Janice Lee, Anil Seth, Fabian Walter, Steven R. Warren
John Cannon
No abstract provided.
The Formation Of Kiloparsec-Scale Hi Holes In Dwarf Galaxies, S. R. Warren, D. R. Weisz, E. D. Skillman, John M. Cannon, J. J. Dalcanton, A. E. Dolphin, R. C. Kennicutt, B. Koribalski, J. Ott, A. M. Stilp, S. D. Van Dyk, F. Walter, A. A. West
The Formation Of Kiloparsec-Scale Hi Holes In Dwarf Galaxies, S. R. Warren, D. R. Weisz, E. D. Skillman, John M. Cannon, J. J. Dalcanton, A. E. Dolphin, R. C. Kennicutt, B. Koribalski, J. Ott, A. M. Stilp, S. D. Van Dyk, F. Walter, A. A. West
John Cannon
No abstract provided.
The Survey Of Hi In Extremely Low-Mass Dwarfs (Shield), John M. Cannon, R. Giovanelli, M. P. Haynes, S. Janowiecki, A. Parker, J. J. Salzer, E.A. K. Adams, E. Engstrom, S. Huang, K.B. W. Mcquinn, J. Ott, A. Saintonge, E. D. Skillman, J. Allan, G. Erny, P. Fliss, A. Smith
The Survey Of Hi In Extremely Low-Mass Dwarfs (Shield), John M. Cannon, R. Giovanelli, M. P. Haynes, S. Janowiecki, A. Parker, J. J. Salzer, E.A. K. Adams, E. Engstrom, S. Huang, K.B. W. Mcquinn, J. Ott, A. Saintonge, E. D. Skillman, J. Allan, G. Erny, P. Fliss, A. Smith
John Cannon
No abstract provided.
The Nature Of Starbursts: Ii. The Duration Of Starbursts In Dwarf Galaxies, Kristen B.W. Mcquinn, Evan D. Skillman, John M. Cannon, Julianne Dalcanton, Andrew Dolphin, Sebastian Hidalgo-Rodríguez, Jon Holtzman, David Stark, Daniel Weisz, Benjamin Williams
The Nature Of Starbursts: Ii. The Duration Of Starbursts In Dwarf Galaxies, Kristen B.W. Mcquinn, Evan D. Skillman, John M. Cannon, Julianne Dalcanton, Andrew Dolphin, Sebastian Hidalgo-Rodríguez, Jon Holtzman, David Stark, Daniel Weisz, Benjamin Williams
John Cannon
No abstract provided.
The Nature Of Starbursts: I. The Star Formation Histories In Eighteen Nearby Starburst Dwarf Galaxies, Kristen B.W. Mcquinn, Evan D. Skillman, John M. Cannon, Julianne Dalcanton, Andrew Dolphin, Sebastian Hidalgo-Rodríguez, Jon Holtzman, David Stark, Daniel Weisz, Benjamin Williams
The Nature Of Starbursts: I. The Star Formation Histories In Eighteen Nearby Starburst Dwarf Galaxies, Kristen B.W. Mcquinn, Evan D. Skillman, John M. Cannon, Julianne Dalcanton, Andrew Dolphin, Sebastian Hidalgo-Rodríguez, Jon Holtzman, David Stark, Daniel Weisz, Benjamin Williams
John Cannon
No abstract provided.
Time Is Not A Vector: Corrections To The Article “Vectorial Relativity Versus Special Or General Relativity?”, Jorge A. Franco
Time Is Not A Vector: Corrections To The Article “Vectorial Relativity Versus Special Or General Relativity?”, Jorge A. Franco
Jorge A Franco
In this work the main conceptual errors that sequentially were introduced in the development of the Special Theory of Relativity (SR) are explained. A simple presentation of the Lorentz Transformations (LT) is given, within where it is emphasized that, by using an incomplete configuration, repeated by more than one hundred years, it leads to a first error of a chain of them, when it is assumed that the cross sectional components, in the movable inertial reference system, are invariant or not affected by its relative movement respect a fixed inertial system, on the basis of a presumed “postulate of isotropy“ …
Observations Of Ozone Production In A Dissipating Tropical Convective Cell During Tc4, Gary A. Morris, A. M. Thompson, K. E. Pickering, S. Chen, E. J. Bucsela, P. A. Kucera
Observations Of Ozone Production In A Dissipating Tropical Convective Cell During Tc4, Gary A. Morris, A. M. Thompson, K. E. Pickering, S. Chen, E. J. Bucsela, P. A. Kucera
Gary A. Morris
From 13 July–9 August 2007, 25 ozonesondes were launched from Las Tablas, Panama as part of the Tropical Composition, Cloud, and Climate Coupling (TC4) mission. On 5 August, a strong convective cell formed in the Gulf of Panama. World Wide Lightning Location Network (WWLLN) data indicated 563 flashes (09:00–17:00 UTC) in the Gulf. NO2 data from the Ozone Monitoring Instrument (OMI) show enhancements, suggesting lightning production of NOx. At 15:05 UTC, an ozonesonde ascended into the southern edge of the now dissipating convective cell as it moved west across the Azuero Peninsula. The balloon oscillated from 2.5–5.1 km five times …
The Stellar And Gaseous Contents Of The Orion Dwarf Galaxy, John M. Cannon, Korey Haynes, Hans Most, John J. Salzer, Kaitlin Haugland, Jillian Scudder, Arthur Sugden, Jacob Weindling
The Stellar And Gaseous Contents Of The Orion Dwarf Galaxy, John M. Cannon, Korey Haynes, Hans Most, John J. Salzer, Kaitlin Haugland, Jillian Scudder, Arthur Sugden, Jacob Weindling
John Cannon
No abstract provided.
Spatially Resolved Polycyclic Aromatic Hydrocarbon Emission Features In Nearby, Low Metallicity, Star-Forming Galaxies, Korey Haynes, John M. Cannon, Evan D. Skillman, Dale C. Jackson, Robert D. Gehrz
Spatially Resolved Polycyclic Aromatic Hydrocarbon Emission Features In Nearby, Low Metallicity, Star-Forming Galaxies, Korey Haynes, John M. Cannon, Evan D. Skillman, Dale C. Jackson, Robert D. Gehrz
John Cannon
No abstract provided.
Triggered Star Formation And The Creation Of The Supergiant H I Shell In Ic 2574, Daniel R. Weisz, Evan D. Skillman, John Cannon, Fabian Walter, Elias Brinks, Jürgen Ott, Andrew E. Dolphin
Triggered Star Formation And The Creation Of The Supergiant H I Shell In Ic 2574, Daniel R. Weisz, Evan D. Skillman, John Cannon, Fabian Walter, Elias Brinks, Jürgen Ott, Andrew E. Dolphin
John Cannon
No abstract provided.
Do Gravitational Waves Exist?, Jorge A. Franco
First Solutions To Gravitation And Orbital Precession Under Vectorial Relativity, Jorge A. Franco
First Solutions To Gravitation And Orbital Precession Under Vectorial Relativity, Jorge A. Franco
Jorge A Franco
One of the reasons of the success of Einstein’s General Theory of Relativity (GTR) was that it allowed to calculate planet’s precession (rotation of the elliptical path axis with time, i.e.: Mercury Precession). The fact that its occurrence has been experimentally observed is not accounted by classic Kepler’s or Newton Laws because it is only applicable to constant masses. This work shows that planet’s precession is a direct consequence of considering variable planet’s mass inside accepted physical laws in our known three-dimensional space. According to us, this work positively confirms new definitions of mass and Energy obtained under Vectorial Relativity.
The Recent Star Formation Histories Of M81 Group Dwarf Galaxies, D. R. Weisz, E. D. Skillman, John M. Cannon, A. E. Dolphin, R. C. Kennicutt, F. Walter
The Recent Star Formation Histories Of M81 Group Dwarf Galaxies, D. R. Weisz, E. D. Skillman, John M. Cannon, A. E. Dolphin, R. C. Kennicutt, F. Walter
John Cannon
No abstract provided.