Results 261 to 270 of about 6,154 (302)
The Magnetic Environments of Young Stellar Objects
Astrophysics and Space Science, 2004 We report on early results of magnetic field measurements towards a sample of young stellar objects. The results show a variety of field configurations, some of which can be explained by conventional models, while others cannot. We find that the field in some cases is curved over large scales and influenced by the gas kinematics in the local ...
Antonio Chrysostomou +2 more
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Accretion disks in luminous young stellar objects [PDF]
Astronomy and Astrophysics Review, 2016 An observational review is provided of the properties of accretion disks around young stars. It concerns the primordial disks of intermediate- and high-mass young stellar objects in embedded and optically revealed phases. The properties were derived from
M T Beltran, W J De Wit
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Chemical evolution of circumstellar matter around young stellar objects
Astrophysics and Space Science, 1995 Recent observational studies of the chemical composition of circumstellar matter around both high- and low-mass young stellar objects are reviewed. The molecular abundances are found to be a strong function of evolutionary state, but not of system mass ...
E F Van Dishoeck +2 more
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SHARP Images of Young Stellar Objects
Astrophysics and Space Science, 1995We present high resolution infrared images of the pre-main sequence star V536 Aql and polarization maps of the reflection nebula IRN Cha observed with the SHARP camera on the ESO NTT. Extended structures are observed near V536 Aql. The polarization pattern of IRN Cha is typical of a centrally illuminated source but with a central band of anomalously ...
N. Ageorges, A. Eckart, R. Hofmann
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Oscillations in Young Stellar Objects
International Astronomical Union Colloquium, 2002AbstractWe report the discovery of periodicities in the light curve of the Herbig Ae star V346 Ori. We interpret these variations as the superposition of at least two signals with periods P1=42±6 min and P2=68±12 min resulting from stellar oscillations.
F.J.G. Pinheiro +5 more
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A Search for Extremely Young Stellar Objects
Chinese Physics Letters, 2003We have observed 22 sources in 13CO and C18O J = 1-0 lines with a 13.7-m telescope at Qinghai station of PMO, NAOC. The samples were chosen with new criteria so that the sources are much redder and fainter than those chosen before. All the 22 sources were detected with the pair lines of 13CO and C18O and are suitable for analysing star formation except
Wu Yue-Fang, Wang Jun-Zhi, Wu Jing-Wen
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Observations of Young Stellar Objects
1988After a brief description of the main properties of embedded protostellar sources, I investigate in some detail the hypothesis that CO bipolar flows are pushed by winds emanating from the infrared central sources associated with the molecular outflows.
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IRAS Colours of Young Stellar Objects
Publications of the Astronomical Society of Australia, 1991AbstractThe effects of including low quality IRAS flux data in colour-colour diagrams is investigated, with a view to identifying Young Stellar Objects from the IRAS database. Colour criteria to perform this task are derived.
M. Suters, W. Zealey
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Evolution of Young Stellar Objects
2012This chapter decribes the evolution of stellar objects after the PMF phase when a young stellar object forms via accretion from its circumstellar cloud. It is difficult, if not impossible, to draw a line between the process of protostellar formation and the evolution of a protostar toward a mature star on the main sequence.
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