Analysis of Filamentary Structure in the Orion and Monoceros Molecular Clouds PDF Download
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Author: William Henri Lahaise
Publisher:
ISBN:
Category :
Languages : en
Pages : 412
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Book Description
Author: William Henri Lahaise
Publisher:
ISBN:
Category :
Languages : en
Pages : 412
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Book Description
Author: Ronald J. Maddalena
Publisher:
ISBN:
Category : Interstellar matter
Languages : en
Pages : 216
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Author: 鄧郁璇
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Ronald J. Maddalena
Publisher:
ISBN:
Category : Interstellar matter
Languages : en
Pages : 214
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Book Description
Author: Wade H. Shafer
Publisher: Springer Science & Business Media
ISBN: 1461519691
Category : Science
Languages : en
Pages : 426
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Book Description
Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS)* at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dis semination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volumes were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 38 (thesis year 1993) a total of 13,787 thesis titles from 22 Canadian and 164 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this impor tant annual reference work. While Volume 38 reports theses submitted in 1993, on occasion, certain uni versities do report theses submitted in previous years but not reported at the time.
Author: Jan Orkisz
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
The new generation of wide-bandwidth high-resolution receivers turns almost any radio observation into a spectral survey. In the case of wide-field imaging of the interstellar medium, such a wealth of data provides new diagnostic tools, but also poses new challenges in terms of data processing and analysis. The ORION-B project aims at observing 5 square degrees of the OB molecular cloud, or about half of the cloud's surface, over the entire 3mm band. The emission of tens of molecular tracers has been mapped, including CO isotopologues, HCO, HCN, HNC, N2H+, methanol, SO, CN...Having access to spatially resolved maps from many molecular species enables us to identify the best tracers of the gas density and illumination. Machine learning techniques have also been applied to these maps, in order to segment the molecular cloud into typical regions based on their molecular emission, and to quantify the most meaningful correlations of different molecular tracers with each other and with physical quantities such as density or dust temperature.The wide-field coverage, together with the spatial and spectral resolution, also allows to characterize statistically the kinematics and dynamics of the gas. The amount of momentum in the compressive and solenoidal (rotational) modes of turbulence are retrieved, showing that the cloud is dominated by solenoidal motions, with the compressive modes being concentrated in two star-forming regions. This result is in line with the overall very low star formation efficiency of the cloud, and highlights the role of compressive forcing in the star formation process.The numerous filaments identified in the molecular cloud also prove to have rather low densities, and are very stable against gravitational collapse. Most filaments are starless, but they show signs of longitudinal and radial fragmentation, which indicates that star formation might occur later on.
Author: Sade H Shafer
Publisher: Springer Science & Business Media
ISBN:
Category : Education
Languages : en
Pages : 440
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Book Description
Cited in Sheehy, Chen, and Hurt . Volume 38 (thesis year 1993) reports a total of 13,787 thesis titles from 22 Canadian and 164 US universities. As in previous volumes, thesis titles are arranged by discipline and by university within each discipline. Any accredited university or college with a grad
Author: R. A. James
Publisher: Cambridge University Press
ISBN: 9780521395434
Category : Science
Languages : en
Pages : 362
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Book Description
The study of molecular clouds has received increasing interest over recent years, particularly in the UK with the advent of powerful new instruments such as MERLIN and the Maxwell millimetre wave telescope. This book is based on the proceedings of the Seventh Manchester International Astronomy Conference which brought together an international list of speakers to discuss important new developments in this field. The book covers a wide range of topics relevant to the general subject of molecular clouds, with review articles and papers from an impressive list of contributors. Much new work in this area is covered, and consequently this book should become an important reference source for workers in this and related fields.
Author: John E. Vaillancourt
Publisher:
ISBN:
Category : Cosmic dust
Languages : en
Pages : 146
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1126
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Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
