Determining the Mass of a Class1/0 Protostar L1527 Using Moment Maps PDF Download
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Author: Andrew Barajas Publisher: ISBN: Category : Astronomy Languages : en Pages : 0
Book Description
Protostars have been studied and examined for decades; however, many puzzles remain about them, from their mass to the kinematics of the gas surrounding the protostar. Spectral lines coming from protostars contain information on the velocity dispersion of the dust/molecules, which arise from the Doppler effect. The kinematics of the infalling and rotating gas provides information on how solar systems developed what type of star will result from these early stages, or constrains on the mass through assumed Keplerian motions. Here we utilize the spectral line cubes of the ClassO/I Protostar L1527's chemical model from ALMA C18O (2-1) model simulations, created using the software package RadChemT, to develop predicted Moment maps and PV diagrams. Moment maps and PV diagrams give us the kinematics of L1527 that are used to determine its mass. Using ALMA's Data Mining Toolkit (ADMIT), we made moment maps and PV diagrams from observed data for L1527. ADMIT is a set of coding tools that help analyze image data cubes. Through comparisons of the observation and model moment maps, we hope to better determine the mass of L1527 and further solidify the accuracy of the RadChemT model of L1527.
Author: Andrew Barajas Publisher: ISBN: Category : Astronomy Languages : en Pages : 0
Book Description
Protostars have been studied and examined for decades; however, many puzzles remain about them, from their mass to the kinematics of the gas surrounding the protostar. Spectral lines coming from protostars contain information on the velocity dispersion of the dust/molecules, which arise from the Doppler effect. The kinematics of the infalling and rotating gas provides information on how solar systems developed what type of star will result from these early stages, or constrains on the mass through assumed Keplerian motions. Here we utilize the spectral line cubes of the ClassO/I Protostar L1527's chemical model from ALMA C18O (2-1) model simulations, created using the software package RadChemT, to develop predicted Moment maps and PV diagrams. Moment maps and PV diagrams give us the kinematics of L1527 that are used to determine its mass. Using ALMA's Data Mining Toolkit (ADMIT), we made moment maps and PV diagrams from observed data for L1527. ADMIT is a set of coding tools that help analyze image data cubes. Through comparisons of the observation and model moment maps, we hope to better determine the mass of L1527 and further solidify the accuracy of the RadChemT model of L1527.
Author: N. Epchtein Publisher: Springer ISBN: Category : Nature Languages : en Pages : 312
Book Description
Outstanding progress in near-infrared detection technology and in real-time image processing has led astronomers to start undertaking all-sky surveys in the 1--2 mum range (project DENIS in Europe and 2MASS in the U.S.A.), surveys which will have a considerable impact in various areas of astronomy. This book gathers the contributions of more than 80 specialists involved in fields of interest as different as low mass stars, late stages of stellar evolution, star formation, stellar populations of the Galaxy and the Magellanic Clouds, the local structure of the Universe, and observational cosmology. It describes the impact on these fields of the exhaustive data bases and catalogs of stars and galaxies that these surveys will provide. The considerable interest of these documents for the future of infrared space and ground-based projects and the complementarity with other currently ongoing or planned surveys in other spectral ranges are emphasized.
Author: José Cernicharo Publisher: Cambridge University Press ISBN: 9781107019805 Category : Science Languages : en Pages : 528
Book Description
Astrochemistry, the study of molecules and their chemistry in astrophysical objects throughout the Universe, is experiencing a true golden age. Astronomical observations of molecules are crucial in contributing to our understanding of the physical conditions in many different astrophysical environments, from the Solar System and extrasolar planets to stars, interstellar clouds and galaxies. Concurrently, laboratory experiments and theoretical studies can provide basic information about the often exotic chemical processes taking place in the Universe. IAU Symposium 280 contains outstanding reviews on the advances in observational, laboratory, theoretical and modelling studies, carried out by leading scientists worldwide. This volume provides researchers and graduate students with an indispensable account of the current state of astrochemistry, its recent successes and the immense possibilities of this fascinating field for future growth.
Author: W.B. Burton Publisher: Springer Science & Business Media ISBN: 3540316299 Category : Science Languages : en Pages : 409
Book Description
The previous Saas-Fee Advanced Course dedicated to the interstellar medium took place in 1972. The tremendous scientific advances that have occurred in this field since then, in particular owing to the availabihty of receivers working at completely unexplored wavelength bands, fuUy justified a new set of lectures. As a consequence, the members of the Swiss Society for Astrophysics and As tronomy voted that "The Galactic Interstellar Medium" should be the subject of the 1991 course. The 21st Saas Fee Advanced Course took place in Les Diablerets from 18 to 23 March 1991, gathering together about 80 participants from all over the world, but mostly from Europe. According to a rule that has proved to lead to success, but also to chal lenge the lecturers' energy, the format of a Saas-Fee Advanced Course consists traditionally of 28 lectures of 45 minutes which take place in the morning and late afternoon, leaving ample time for discussions, self-study, hiking or skiing. Despite the inordinate work load imposed, this year's lecturers felt that the subject was sufficiently dense to increase the lecture time by 1/3! This proved judicious and left more time for questions and discussions during the lectures.
Author: Jose Alonso Publisher: Royal Society of Chemistry ISBN: 1788018168 Category : Science Languages : en Pages : 473
Book Description
Isotope Dilution Mass Spectrometry (IDMS) has become an essential tool in research laboratories and is increasingly used in routine analysis labs (including environmental, food safety and clinical applications). This is the first textbook to present a comprehensive and instructive view of the theory and applications of this growing technique. The main objective of this book is to cover the theory and applications of Isotope Dilution in Analytical Chemistry. The scope is comprehensive to include elemental analysis, speciation analysis, organic analysis and biochemical and clinical analysis together with applications in metabolism studies and traceability of goods. Until now there have been no books published with the same general scope (only book chapters on particular applications). This is a textbook focused at post-graduate level covering the basic knowledge required for doctoral studies in this field. Isotope Dilution Mass Spectrometry will also outline practical applications of interest for routine testing laboratories where isotope dilution procedures are implemented or can be implemented in the future. This unique book covers all the theoretical and practical aspects of Isotope Dilution Mass Spectrometry (IDMS). Due to the increasing application of IDMS in many research laboratories and the increasing implementation of IDMS methodologies in routine testing laboratories, scientists in industry and working in or affiliated to this area will this an invaluable source of information. Concerning the theoretical aspects, the authors present a uniform theoretical background which grows from previous developments in Organic, Speciation and Elemental analysis both in their own laboratory and in other laboratories around the world. This general approach will be simpler and will also include new emerging fields such as quantitative proteomics and metabolism studies.
Author: Shuo Li Publisher: Springer ISBN: 3319125087 Category : Technology & Engineering Languages : en Pages : 507
Book Description
This book is instrumental to building a bridge between scientists and clinicians in the field of spine imaging by introducing state-of-the-art computational methods in the context of clinical applications. Spine imaging via computed tomography, magnetic resonance imaging, and other radiologic imaging modalities, is essential for noninvasively visualizing and assessing spinal pathology. Computational methods support and enhance the physician’s ability to utilize these imaging techniques for diagnosis, non-invasive treatment, and intervention in clinical practice. Chapters cover a broad range of topics encompassing radiological imaging modalities, clinical imaging applications for common spine diseases, image processing, computer-aided diagnosis, quantitative analysis, data reconstruction and visualization, statistical modeling, image-guided spine intervention, and robotic surgery. This volume serves a broad audience as contributions were written by both clinicians and researchers, which reflects the intended readership as well, being a potentially comprehensive book for all spine related clinicians, technicians, scientists, and graduate students.
Author: Richard G. Ames Publisher: DEStech Publications, Inc ISBN: 1605951498 Category : Technology & Engineering Languages : en Pages : 951
Book Description
Original research from around the world on weapons-grade projectiles, warheads, missiles, guns and their effects on target materialsNew information on shaped charges, fire, control strategies, simulation, blast resistance, non-lethal systems and more190 original presentations in two printed volumes, plus searchable CD The first part of this 2-volume set, part of an ongoing series, presents previously unpublished research on the design and modeling of ballistic devices ranging from shells to missiles, including explosives, propellants and internal components. The second part investigates the effects of ballistic penetrants on a variety of targets, including human models, as well as hard targets and diverse armors made from engineered fibers, ceramics, metal alloys and concrete. Data is included on the modeling and testing of novel devices, explosives and shielding strategies. Papers in this text were presented at a symposium organized by the National Defense Industrial Association with the International Ballistics Society. The CD-ROM displays figures and illustrations in articles in full color along with a title screen and main menu screen. Each user can link to all papers from the Table of Contents and Author Index and also link to papers and front matter by using the global bookmarks which allow navigation of the entire CD-ROM from every article. Search features on the CD-ROM can be by full text including all key words, article title, author name, and session title. The CD-ROM has Autorun feature for Windows 2000 with Service Pack 4 or higher products along with the program for Adobe Acrobat Reader with Search 11.0. One year of technical support is included with your purchase of this product.
Author: Don A. Cowan Publisher: Springer ISBN: 3642452132 Category : Science Languages : en Pages : 324
Book Description
This book brings together many of the world’s leading experts in the fields of Antarctic terrestrial soil ecology, providing a comprehensive and completely up-to-date analysis of the status of Antarctic soil microbiology. Antarctic terrestrial soils represent one of the most extreme environments on Earth. Once thought to be largely sterile, it is now known that these diverse and often specialized extreme habitats harbor a very wide range of different microorganisms. Antarctic soil communities are relatively simple, but not unsophisticated. Recent phylogenetic and microscopic studies have demonstrated that these communities have well established trophic structuring and play a significant role in nutrient cycling in these cold and often dry desert ecosystems. They are surprisingly responsive to change and potentially sensitive to climatic perturbation. Antarctic terrestrial soils also harbor specialized ‘refuge’habitats, where microbial communities develop under (and within) translucent rocks. These cryptic habitats offer unique models for understanding the physical and biological ‘drivers’ of community development, function and evolution.
Author: Andrew Barajas
Author: Andrew Barajas
Author: N. Epchtein
Author: José Cernicharo
Author: Gerry Neugebauer
Author: W.B. Burton
Author: Jose Alonso
Author: Alexei V. Filippenko
Author: Shuo Li
Author: Richard G. Ames
Author: Don A. Cowan