Twin Jets and Close Binary Formation
Astrophysical Journal Letters, ISSN: 2041-8213, Vol: 897, Issue: 2
2020
- 14Citations
- 17Captures
- 1Mentions
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Article Description
The formation of a close binary system is investigated using a three-dimensional resistive magnetohydrodynamic simulation. Starting from a prestellar cloud, the cloud evolution is calculated until ∼400 yr after protostar formation. Fragmentation occurs in the gravitationally collapsing cloud, and two fragments evolve into protostars. The protostars orbit each other and a protobinary system appears. A wide-Angle low-velocity outflow emerges from the circumbinary streams that enclose two protostars, while each protostar episodically drives high-velocity jets. Thus, the two high-velocity jets are surrounded by the low-velocity circumbinary outflow. The speed of the jets exceeds ⪆100. Although the jets have a collimated structure, they are swung back on the small scale and are tangled at the large scale due to the binary orbital motion. A circumstellar disk also appears around each protostar. In the early main accretion phase, the binary orbit is complicated, while the binary separation is within <30 au. For the first time, all the characteristics of protobinary systems recently observed with large telescopes are reproduced in a numerical simulation.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85088013252&origin=inward; http://dx.doi.org/10.3847/2041-8213/ab9d86; https://iopscience.iop.org/article/10.3847/2041-8213/ab9d86; https://dx.doi.org/10.3847/2041-8213/ab9d86; https://validate.perfdrive.com/9730847aceed30627ebd520e46ee70b2/?ssa=6ca3b315-a5ed-42b4-9f94-9793ae5c2e53&ssb=26826216997&ssc=https%3A%2F%2Fiopscience.iop.org%2Farticle%2F10.3847%2F2041-8213%2Fab9d86&ssi=b9c2e76e-cnvj-4fe9-a909-7e21142d83b1&ssk=botmanager_support@radware.com&ssm=13012267774664359209957300354082201&ssn=67a6a838ba282704eb5b3f04ba041d47fd7a11e4fc9b-fb87-4f4d-95314e&sso=0920f121-2d7afa72fb707786c62793e5ca646b0362052081a3d2c3b4&ssp=78375707201727207332172759658936780&ssq=59478154051838130911389217438680292126230&ssr=NTIuMy4yMTcuMjU0&sst=com.plumanalytics&ssu=&ssv=&ssw=&ssx=eyJ1em14IjoiN2Y5MDAwNTVmODk4Y2YtYWZlOS00YThjLWIxZjEtZWFmODE3MTQ1NzM3NC0xNzI3Mjg5MjE3MzMwMjUxMzAwNzQ4LTlhOTllMjNiYjY4YjAyYjUyMDk5NSIsInJkIjoiaW9wLm9yZyIsIl9fdXptZiI6IjdmNjAwMDdmNTZkOWViLTQ0ODgtNDJiZi1iMjIxLTA5Y2Y5MmRiNTYyZDE3MjcyODkyMTczMzAyNTEzMDA3NDgtYTE2MjczZWJmYmMyMDQxYTIwOTk1In0=
American Astronomical Society
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