✩ Constraining Disk Parameters Of Be Stars Using Narrowband Halpha Interferometry With The Navy Prototype Optical Interferometer ✩
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"Constraining Disk Parameters of Be Stars Using Narrowband Halpha Interferometry With the Navy Prototype Optical Interferometer"

♥ Book Title : Constraining Disk Parameters of Be Stars Using Narrowband Halpha Interferometry With the Navy Prototype Optical Interferometer
♣ Name Author :
♦Text Language : en Sentences
∞ Launching : 2006
◊ Info ISBN Link : OTHER
⊗ Detail ISBN code : OCLC:227888958
⊕ Number Pages : Total 13 sheet
♮ News id : rWiBAQAACAAJ

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☯ Full Synopsis :Interferometric observations of two well-known Be stars, gamma Cas and phi Per, were collected and analyzed to determine the spatial characteristics of their circumstellar regions. The observations were obtained using the Navy Prototype Optical Interferometer equipped with custom-made narrowband filters. The filters isolate the H(alpha) emission line from the nearby continuum radiation, which results in an increased contrast between the interferometric signature due to the H(alpha)-emitting circumstellar region and the central star. Because the narrowband filters do not significantly attenuate the continuum radiation at wavelengths 50 nm or more away from the line, the interferometric signal in the H(alpha) channel is calibrated with respect to the continuum channels. The observations used in this study represent the highest spatial resolution measurements of the H -emitting regions of Be stars obtained to date. These observations allow us to demonstrate for the first time that the intensity distribution in the circumstellar region of a Be star cannot be represented by uniform disk or ringlike structures, whereas a Gaussian intensity distribution appears to be fully consistent with our observations."Article☾ ☽ Statement ..."

"Databases On line Data in Astronomy"

♥ Book Title : Databases On line Data in Astronomy
♣ Name Author : M.A Albrecht
♦Text Language : en Sentences
∞ Launching : 2012-11-05
◊ Info ISBN Link : ISBN_10
⊗ Detail ISBN code : 9401054339
⊕ Number Pages : Total 273 sheet
♮ News id : 3GkHnwEACAAJ

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☯ Full Synopsis :Data archiving has, for many years, been the most disregarded aspect of all data systems. The increase in numbers of telescopes, both groundbased and space-borne, and the increase in efficiency of detectors have generated overwhelming amounts of data. Much of these data were and are not used on short timescales and (should) have been archived, where they can be used later and/or by others. Archiving is essential. Objects can change in the course of time. New technological or scientific developments might require observing objects again. The cost-benefit ratio will become more and more important when considering the allocation of telescope time. The retrieval of `old' data can then be crucial. At present there are a number of data collections and data retrieval systems. This book includes a series of clear and up-to-date descriptions of many important available data systems. For professional astronomers, librarians and computer engineers."Article☾ M.A Albrecht☽ Statement ..."

"The Astrophysics of Emission Line Stars"

♥ Book Title : The Astrophysics of Emission Line Stars
♣ Name Author : Tomokazu Kogure
♦Text Language : en Sentences
∞ Launching : 2010-05-05
◊ Info ISBN Link : ISBN_10
⊗ Detail ISBN code : 0387689958
⊕ Number Pages : Total 537 sheet
♮ News id : qt5sueHmtR4C

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☯ Full Synopsis :Emission line stars are attractive to many people because of their spectacular phenomena and their amazing varieties and variability. This book offers general information on emission line stars, starting from a brief introduction to stellar astrophysics and then moving to a broad overview of emission line stars including early and late type stars as well as pre-main sequence stars."Article☾ Tomokazu Kogure☽ Statement ..."

"Introduction to Astronomy and Cosmology"

♥ Book Title : Introduction to Astronomy and Cosmology
♣ Name Author : Ian Morison
♦Text Language : en Sentences
∞ Launching : 2013-03-18
◊ Info ISBN Link : ISBN_13
⊗ Detail ISBN code : 9781118681527
⊕ Number Pages : Total 360 sheet
♮ News id : Fh_yo8Jv7t8C

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☯ Full Synopsis :Introduction to Astronomy & Cosmology is a modern undergraduate textbook, combining both the theory behind astronomy with the very latest developments. Written for science students, this book takes a carefully developed scientific approach to this dynamic subject. Every major concept is accompanied by a worked example with end of chapter problems to improve understanding Includes coverage of the very latest developments such as double pulsars and the dark galaxy. Beautifully illustrated in full colour throughout Supplementary web site with many additional full colour images, content, and latest developments."Article☾ Ian Morison☽ Statement ..."

"Macro mind Power"

♥ Book Title : Macro mind Power
♣ Name Author : Rebecca Clark
♦Text Language : en Sentences
∞ Launching : 1978
◊ Info ISBN Link : ISBN_10
⊗ Detail ISBN code : 0854540725
⊕ Number Pages : Total 239 sheet
♮ News id : voOEAAAACAAJ

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☯ Full Synopsis :"Article☾ Rebecca Clark☽ Statement ..."