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  • 1990-1994  (1)
  • 1985-1989  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Molecular cloud condensation as a tracer of low-mass star formation (1994)
    [s.l.] : Nature Publishing Group
    Nature 368 (1994), S. 719-721 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Star formation is generally studied by observing emission from trace molecules in the clouds6'7-molecular hydrogen is not observable under most conditions-or using far-infrared emission from the dust8'9. The quasi-static collapse of molecular clouds can be followed by observing molecules that trace ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/368719a0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    High-resolution observations of the Orion bright bar (1986)
    Springer
    Astrophysics and space science 118 (1986), S. 401-404 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract High resolution strip maps of CS (J=1–0) and H51α line emission across the Orion bright bar are presented. They reveal the existence of a high density molecular layer (molecular sheet) plane parallel to the ionization front. This molecular sheet is redshifted relative to the ambient molecular cloud by about 2 km s−1. The rapid decrease of the CS emission at about 50 arc sec from the bar suggests that a shock front exists here and the sheet is a post shock layer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00651156
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Cep A: A possible proto-cluster (1986)
    Springer
    Astrophysics and space science 119 (1986), S. 155-157 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present high resolution CS and CO maps of Cep A region made with the 45m telescope at Nobeyama. The CS map shows that a dense cloud surrounding the proto-star cluster extends in the North-South direction and is probably rotating. The bipolar molecular flow apparent in the CO maps is well-collimated along East-West direction within 0.2 pc from the proto-stars. The dense cloud is gravitationally unstable and appears to be in a contracting phase to form a cluster of massive stars.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00648836
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Star formation associated with high-velocity mass outflows (invited review) (1986)
    Springer
    Astrophysics and space science 118 (1986), S. 421-434 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Energetic mass outflows have been detected in molecular line observations towards young stellar objects. In this review we take the Orion-KL as an example to discuss the overall structure of a high-velocity outflow and its environment. The kinematics of the high-velocity molecular emission show clear evidence of a bipolar jet which originates in the vicinity of IRc2, a massive protostar. Towards the ends of the jet, 0.05 pc away from the origin of the flow, the interaction between the high-velocity flow and the ambient molecular gas excites shocks. The protostar is encircled by a disc of dense molecular gas, the inner 0.04 pc of which is expanding while the outer part shows signs of rotation and contraction. A comparison between the dynamical timescales of the disk and the bipolar jet may suggest that the disk itself, or some mechanism of disk formation, is also responsible for the bipolar nature of the high-velocity flow.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00651162
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    Paper (German National Licenses)
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