Imperial College London
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DrJamesOwen

Faculty of Natural Sciences, Department of Physics

Senior Lecturer in Exoplanet Physics
 
 
 
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Contact

 

+44 (0)20 7594 5785james.owen CV

 
 
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Location

 

Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Dempsey:2020:mnras/staa1264,
author = {Dempsey, R and Zakamska, NL and Owen, JE},
doi = {mnras/staa1264},
journal = {Monthly Notices of the Royal Astronomical Society},
pages = {1172--1187},
title = {Formation of Orion fingers},
url = {http://dx.doi.org/10.1093/mnras/staa1264},
volume = {495},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - ‘Orion fingers’ are a system of dozens of bow shocks, with the wings of shocks pointing to a common system of origin, which is centred on a dynamically disintegrating system of several massive stars. The shock heads propagate with velocities of up to 300–400 km s−1, but the formation and physical properties of the ‘bullets’ leading the shocks are not known. Here, we summarize two possible scenarios for the formation of the ‘bullets’ and the resulting bow shocks (‘fingers’). In the first scenario, bullets are self-gravitating, Jupiter-mass objects that were formed rapidly and then ejected during the strong dynamical interactions of massive stars and their discs. This scenario naturally explains the similar time-scales for the outflow of bullets and for the dynamical interaction of the massive stars, but has some difficulty explaining the observed high velocities of the bullets. In the second scenario, bullets are formed via hydrodynamic instabilities in a massive, infrared-driven wind, naturally explaining the high velocities and the morphology of outflow, but the bullets are not required to be self-gravitating. The processes that created the Orion fingers are likely not unique to this particular star-forming region and may result in free-floating, high-velocity, core-less planets.
AU  - Dempsey,R
AU  - Zakamska,NL
AU  - Owen,JE
DO  - mnras/staa1264
EP  - 1187
PY  - 2020///
SN  - 0035-8711
SP  - 1172
TI  - Formation of Orion fingers
T2  - Monthly Notices of the Royal Astronomical Society
UR  - http://dx.doi.org/10.1093/mnras/staa1264
UR  - https://academic.oup.com/mnras/article/495/1/1172/5837582
UR  - http://hdl.handle.net/10044/1/79769
VL  - 495
ER  -
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