High Velocity Cloud Interactions with Their Ambient Environment PDF Download
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Author: Jeffrey Alan Gritton
Publisher:
ISBN:
Category :
Languages : en
Pages : 132
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Book Description
High velocity clouds (HVCs) are collections of gas around the Milky Way galaxy and other galaxies with masses ranging from tens of thousands of solar masses to millions of solar masses. These cool clouds can potentially supply new cool material to the disks of galaxies. Many unanswered questions exist about HVCs; e.g. "How do HVCs form?", "How long can HVCs survive while interacting with the hot ambient material?", and "How do HVCs affect, and how are they affected by, our Galaxy?" Using detailed multi-dimensional numerical simulations, this study focuses on how HVCs interact with their ambient environments and how these interactions affect the cloud's metal concentration, condensation and evaporation rates, and morphology. Using the results of these simulations this study suggests methods to determine the origins of HVCs based on observed metal concentrations, and how initial parameter space affects the condensation of ambient material onto HVCs.
Author: Jeffrey Alan Gritton
Publisher:
ISBN:
Category :
Languages : en
Pages : 132
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Book Description
High velocity clouds (HVCs) are collections of gas around the Milky Way galaxy and other galaxies with masses ranging from tens of thousands of solar masses to millions of solar masses. These cool clouds can potentially supply new cool material to the disks of galaxies. Many unanswered questions exist about HVCs; e.g. "How do HVCs form?", "How long can HVCs survive while interacting with the hot ambient material?", and "How do HVCs affect, and how are they affected by, our Galaxy?" Using detailed multi-dimensional numerical simulations, this study focuses on how HVCs interact with their ambient environments and how these interactions affect the cloud's metal concentration, condensation and evaporation rates, and morphology. Using the results of these simulations this study suggests methods to determine the origins of HVCs based on observed metal concentrations, and how initial parameter space affects the condensation of ambient material onto HVCs.
Author: Hugo van Woerden
Publisher: Springer Science & Business Media
ISBN: 1402025793
Category : Science
Languages : en
Pages : 414
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Book Description
On the occasion of the retirement of Ulrich Schwarz, a symposium was held in Groningen in May of 1996, celebrating his contributions to the study of the int- stellar medium, including his work on the high-velocity clouds. The coming together of many specialists in the latter ?eld prompted the idea of compiling a book c- taining their contributions, and summarizing the status of our understanding of the high-velocity cloud phenomenon. This seemed especially worthwhile at the time, since many exciting developments were taking place. After the discovery of some H i clouds with high velocities, about 40 years ago, the subject had been dominated by 21-cm observations of H i emission. Starting in the mid-1980s much progress was being made because of the availability of new instruments, such as large ground-based optical telescopes and UV observatories in space. The connections between the work on high-velocity clouds and other studies of the properties of the (hot) interstellar medium also became clearer.
Author: Henry B. Garrett
Publisher:
ISBN:
Category : Astronautics
Languages : en
Pages : 776
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Book Description
Author: Marsha R. Torr
Publisher:
ISBN:
Category : Contamination (Technology)
Languages : en
Pages : 158
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Book Description
Author: B. P. Wakker
Publisher:
ISBN:
Category : Clouds
Languages : en
Pages :
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 456
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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.
Author: A. Pedersen
Publisher:
ISBN:
Category : Ionospheric electron density
Languages : en
Pages : 230
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Book Description
Author: Charles J. Lada
Publisher: Springer Science & Business Media
ISBN: 9401136424
Category : Science
Languages : en
Pages : 779
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Book Description
The origin of stars is one of the principle mysteries of nature. During the last two decades advances in technology have enabled more progress to be made in the quest to understand stellar origins than at any other time in history. The study of star formation has developed into one of the most important branches of mod ern astrophysical research. A large body of observational data and a considerable literat ure now exist concerning this topic and a 1arge community of international astronomers and physicists devote their efforts attempting to decipher the secrets of stellar birth. Yet, the young astronomerjphysicist or more advanced researcher desiring to obtain a basic background in this area of research must sift through a very diverse and sometimes bewildering literature. A literature which includes research in many discip1ines and sub discip1ines of classical astrophysics from stel lar structure to the interstellar medium and encompasses the entire range of the electromagnetic spectrum from radio to gamma rays. Often, the reward of a suc cessfu1 foray through the current literature is the realization that the results can be obsolete and outdated as soon as the ink is dry in the journal or the conference proceeding in which they are published.
Author: Viktor Tóth
Publisher:
ISBN:
Category : Stars
Languages : en
Pages : 276
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Book Description
Author: Bo Reipurth
Publisher: Springer Science & Business Media
ISBN: 9401156085
Category : Science
Languages : en
Pages : 606
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Book Description
Herbig-Haro objects were discovered 50 years ago, and during this half century they have developed from being mysterious small nebulae to be coming an important phenomenon in star formation. Indeed, HH flows are now recognized not only as fascinating astrophysical laboratories involving shock physics and chemistry, hydrodynamics and radiation processes, but it has gradually been realized that HH flows hold essential clues to the birth and early evolution of low mass stars. IAU Symposium No. 182 on Herbig-Haro Flows and the Birth of Low Mass Stars were held from January 20 to 24, 1997 in Chamonix in the french alps. A total of 178 researchers from 26 countries met to discuss our present level of understanding of Herbig-Haro flows and their relation to disk accretion events and T Tauri winds and other outflow phenomena like molecular outflows, embedded molecular hydrogen flows and radio jets. The present book contains the manuscripts from the oral contributions of the symposium. The poster papers were printed in a separate volume Low Mass Star Formation - from Infall to Outflow, edited by Fabien Malbet and Alain Castets, which was distributed at the beginning of the meeting. Together these two books document the vigorous state and the scientific appeal which research into Herbig-Haro flows and related issues in star formation enjoys today, observationally as well as theoretically.
