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The nature of a primary jet within a circumbinary disc outflow in a young stellar system
The nature of a primary jet within a circumbinary disc outflow in a young stellar system
- Source :
- Monthly Notices of the Royal Astronomical Society. 494:2299-2311
- Publication Year :
- 2020
- Publisher :
- Oxford University Press (OUP), 2020.
-
Abstract
- Most stars form in binaries, and both stars may grow by accreting material from a circumbinary disc onto their personal discs. We suspect that in many cases a wide molecular wind will envelope a collimated atomic jet emanating from close to an orbiting young star. This so-called Circumbinary Scenario is explored here in order to find common identifiable properties. The dynamical set up is studied with three dimensional simulations with chemistry and cooling included. We extract the properties on scales of order 100\,AU and compare to the Co-Orbital Scenario in which the wind and jet sources are in orbit. We find that the rapid orbital motion generates a wide ionised sheath around the jet core with a large opening angle at the base. This is independent of the presence of the surrounding molecular outflow. However, the atomic jet is recollimated beyond ~ 55 AU when the molecular outflow restricts the motion of the ambient medium which, in turn, confines the jet. These physical properties are relayed to the optical H-alpha imaging, providing a means of distinguishing between models. The high excitation sheath and recollimation region can be explored on these scales through the next generation of instruments. However, in general, the amount and location of the ionised material, whether in the knots or the sheath, will depend on several parameters including the orbital period, axis alignment and pulse amplitude.<br />12 pages, 13 figures, submitted to MNRAS
- Subjects :
- Physics
Jet (fluid)
010308 nuclear & particles physics
Astrophysics::High Energy Astrophysical Phenomena
FOS: Physical sciences
Astronomy and Astrophysics
Astrophysics
Orbital period
01 natural sciences
Orbit
Stars
Astrophysics - Solar and Stellar Astrophysics
Space and Planetary Science
Primary (astronomy)
0103 physical sciences
Orbital motion
Astrophysics::Solar and Stellar Astrophysics
Outflow
Astrophysics::Earth and Planetary Astrophysics
Circumbinary planet
010303 astronomy & astrophysics
Solar and Stellar Astrophysics (astro-ph.SR)
Astrophysics::Galaxy Astrophysics
Subjects
Details
- ISSN :
- 13652966 and 00358711
- Volume :
- 494
- Database :
- OpenAIRE
- Journal :
- Monthly Notices of the Royal Astronomical Society
- Accession number :
- edsair.doi.dedup.....23e8c6323470a562d1ed34d4fdd19e4c
- Full Text :
- https://doi.org/10.1093/mnras/staa860