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The star-forming region in Orion KL
Astronomy Letters, 2003We have studied the fine structure of the active H2O supermaser emission region in Orion KL with an angular resoln. of 0.1 mas. We found central features suggestive of a bipolar outflow, bullets, and an envelope which correspond to the earliest stage of low-mass star formation.
Matveyenko, L. I. +3 more
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Acetaldehyde in star-forming regions
Advances in Space Research, 2004Abstract Observations of acetaldehyde (CH 3 CHO) in a survey of nine star-forming regions are presented. Emission is clearly detected from both the A and E symmetry states in the 4 04 –3 03 and 5 05 –4 04 transitions. Both the range of the measured CH 3 CHO column densities (∼4×10 12 –10 14 cm −2 ), and the derived fractional abundances, are in ...
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Magnetic massive stars in star forming regions
Proceedings of the International Astronomical Union, 2018AbstractOne idea for the origin of magnetic fields in massive stars suggests that the magnetic field is the fossil remnant of the Galactic ISM magnetic field, amplified during the collapse of the magnetised gas cloud. A search for the presence of magnetic fields in massive stars located in active sites of star formation led to the detection of rather ...
Markus Schöller +2 more
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Clumpiness in Star Forming Regions
Astrophysics and Space Science, 2003In this article, some aspects of the clumpy nature of molecular clouds are reviewed. In particular the observational evidence for small-scale structures both in low and high mass star forming regions will be discussed. I will review some examples of `clumpiness' such as: i) the molecular clumps ahead of HH objects and how the study of the physical and ...
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Molecular shocks in star forming regions
Astrophysics and Space Science, 1995The role of excited molecular hydrogen as a powerful observational tool is examined in the context of shock phenomena in molecular clouds, particularly in star forming regions. Conclusions that may be drawn from line intensities and line profiles, and the properties of J and C shocks in a bow shock structure are discussed.
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Kinematics of Star-Forming Regions
2015The previous chapters on star-forming regions have focussed on the spatial distributions of gas and stars. This chapter therefore focusses on the internal kinematics of the young stars within the star-forming regions. Our discussion covers the kinematics of objects in OB associations and young star clusters as well as star-forming regions, detailing ...
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Overview of Star-Forming Regions
2015The dynamical evolution of young star clusters and associations is an evolving interplay of the gravitational potential, as determined by the spatial distribution of volume densities and the motions of both the gas and stars. In this chapter we briefly discuss several nearby star-forming regions which are relevant to our discussion on the dynamics of ...
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Chemistry of Star-Forming Regions
2017Birth of protostars significantly affects chemical compositions of parent molecular clouds. Observational results of low-mass and high-mass star-forming regions are summarized, which show significant chemical differentiation within a source as well as among sources.
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