Measuring the ionisation fraction in a jet from a massive protostar

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Title: Measuring the ionisation fraction in a jet from a massive protostar
Authors: Fedriani, RubenCaratti o Garatti, AlessioPurser, S. J. D.Coffey, Deirdreet al.
Permanent link: http://hdl.handle.net/10197/11140
Date: 9-Aug-2019
Online since: 2019-10-11T08:57:40Z
Abstract: It is important to determine if massive stars form via disc accretion, like their low-mass counterparts. Theory and observation indicate that protostellar jets are a natural consequence of accretion discs and are likely to be crucial for removing angular momentum during the collapse. However, massive protostars are typically rarer, more distant and more dust enshrouded, making observational studies of their jets more challenging. A fundamental question is whether the degree of ionisation in jets is similar across the mass spectrum. Here we determine an ionisation fraction of ~5–12% in the jet from the massive protostar G35.20-0.74N, based on spatially coincident infrared and radio emission. This is similar to the values found in jets from lower-mass young stars, implying a unified mechanism of shock ionisation applies in jets across most of the protostellar mass spectrum, up to at least ~10 solar masses.
Funding Details: European Commission Horizon 2020
European Research Council
Science Foundation Ireland
metadata.dc.description.othersponsorship: National Science Foundation (USA)
Type of material: Journal Article
Publisher: Springer
Journal: Nature Communications
Volume: 10
Copyright (published version): 2019 the Authors
Keywords: Astronomy and astrophysicsInterstellar mediumStarsStellar evolution
DOI: 10.1038/s41467-019-11595-x
Language: en
Status of Item: Peer reviewed
Appears in Collections:Physics Research Collection

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