Results 91 to 100 of about 434 (137)
CO IN PROTOSTARS (COPS): HERSCHEL-SPIRE SPECTROSCOPY OF EMBEDDED PROTOSTARS [PDF]
Proceedings of the 72nd International Symposium on Molecular Spectroscopy, 2017 Yao-Lun Yang, Neal Evans II, Joel Green
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Physical properties of protostars
, 2001 Prominent star forming regions were investigated at wavelengths between 1.2 and 1300 \(\mu\)m. The evolutionary stages of the YSOs were determined and turned out to range from collapsing cloud fragments, Class 0 protostars to more evolved Class I sources. Physical properties were derived for them.
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Science, 1998
In recent years, astronomers have begun to discover an increasing number of planets orbiting stars outside our solar system. The characteristics and origins of these planetary bodies are the subject of intense interest and debate. In their Perspective, Russell and Boss discuss the latest results on extrasolar planetary systems presented at a recent ...
Sara S. Russell, Alan P. Boss
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In recent years, astronomers have begun to discover an increasing number of planets orbiting stars outside our solar system. The characteristics and origins of these planetary bodies are the subject of intense interest and debate. In their Perspective, Russell and Boss discuss the latest results on extrasolar planetary systems presented at a recent ...
Sara S. Russell, Alan P. Boss
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Physics Today, 1966
Recent observations have placed a very narrow bound on the extent of the celestial x-ray source in the constellation Scorpio (hereinafter designated “Sco X-1”) and provoked a suggestion that it may represent a hitherto unseen class of objects, protostars.
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Recent observations have placed a very narrow bound on the extent of the celestial x-ray source in the constellation Scorpio (hereinafter designated “Sco X-1”) and provoked a suggestion that it may represent a hitherto unseen class of objects, protostars.
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Il Nuovo Cimento C, 1993
We present molecular-line observations of young stellar objects (YSOs) suspected to be protostars in the main accretion phase. The aim of this work is to define a list of the best protostellar candidates to be observed in the near future with the ISO spectrometers with the precise scope of searching for the final proof of the infall, theHoly Grail of ...
S. Molinari +4 more
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We present molecular-line observations of young stellar objects (YSOs) suspected to be protostars in the main accretion phase. The aim of this work is to define a list of the best protostellar candidates to be observed in the near future with the ISO spectrometers with the precise scope of searching for the final proof of the infall, theHoly Grail of ...
S. Molinari +4 more
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2012
The Jeans criterion derived in the foregoing section follows from a first-order perturbation theory and gives conditions under which perturbations of an equilibrium stage will grow exponentially. But the linear theory does not give information, for instance, about the fully developed collapse, to say nothing about the final product.
Rudolf Kippenhahn +2 more
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The Jeans criterion derived in the foregoing section follows from a first-order perturbation theory and gives conditions under which perturbations of an equilibrium stage will grow exponentially. But the linear theory does not give information, for instance, about the fully developed collapse, to say nothing about the final product.
Rudolf Kippenhahn +2 more
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Computer Physics Communications, 1976
Abstract A review is given of the physical and numerical problems which arise in the theory of star formation. The evolution of protostars based on numerical calculations is qualitatively described. From the discussion of the basic physics conclusions are drawn regarding the demands on the numerical methods. Some new ideas are outlined concerning the
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Abstract A review is given of the physical and numerical problems which arise in the theory of star formation. The evolution of protostars based on numerical calculations is qualitatively described. From the discussion of the basic physics conclusions are drawn regarding the demands on the numerical methods. Some new ideas are outlined concerning the
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2018
This thesis examines several regions of star formation selected because they were believed to be the youngest of their type. The sources studied are examples of low, medium and high-mass star formation, namely B335, NGC2024 and DR21(OH). High-resolution mapping of the thermal dust emission from B335 shows it to contain a dense core elongated in a ...
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This thesis examines several regions of star formation selected because they were believed to be the youngest of their type. The sources studied are examples of low, medium and high-mass star formation, namely B335, NGC2024 and DR21(OH). High-resolution mapping of the thermal dust emission from B335 shows it to contain a dense core elongated in a ...
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2008
A summary of the basic properties of molecular clouds is given.For a selection of nearby clouds, search stategies for protostars are summarized. A critical discussion of low-mass candidates in nearby molecular clouds is presented.
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A summary of the basic properties of molecular clouds is given.For a selection of nearby clouds, search stategies for protostars are summarized. A critical discussion of low-mass candidates in nearby molecular clouds is presented.
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A Galactic survey of radio jets from massive protostars
Monthly Notices of the Royal Astronomical Society, 2021S J D Purser, S L Lumsden, M G Hoare
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