Results 171 to 180 of about 4,978 (213)
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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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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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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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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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Protostars and Protoplanetary Disks
Astrophysics and Space Science, 1997A great wealth of observational information about young stars has been obtained at infrared and longer wavelengths in the last decade. Combined with continued theoretical progress, these observations have pushed our understanding of the overall star formation process to a satisfying level.
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2006
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #238.05, 5-10 January, 2007, Seattle, Washington ...
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2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #238.05, 5-10 January, 2007, Seattle, Washington ...
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Dynamics of a collapsing protostar
1968NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document. Numerical calculations of the dynamics of a spherically symmetric collapsing protostar have been made for various assumed initial conditions.
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Methanol deuteration in high-mass protostars
Astronomy and Astrophysics, 2022Ewine van Dishoeck +2 more
exaly
Protostars, Disks, and Planets
1979For some centuries, attempts to understand the origin of the solar system were preoccupied with explaining its remarkable dynamical characteristics. It is only during the last few decades that the comparable importance of physicochemical properties as clues to origin has become generally appreciated.
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