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Measuring the ionisation fraction in a jet from a massive protostar

Fedriani, R. (author)
Dublin Institute for Advanced Studies,University College Dublin, National University Of Ireland
Garatti, A. Caratti o. (author)
University College Dublin, National University Of Ireland,Dublin Institute for Advanced Studies
Purser, S. J.D. (author)
Dublin Institute for Advanced Studies
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Sanna, A. (author)
Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
Tan, Jonathan, 1973 (author)
Chalmers tekniska högskola,Chalmers University of Technology,University of Virginia
Garcia-Lopez, R. (author)
Dublin Institute for Advanced Studies
Ray, T. P. (author)
Dublin Institute for Advanced Studies
Coffey, Deirdre (author)
University College Dublin, National University Of Ireland,Dublin Institute for Advanced Studies
Stecklum, B. (author)
Thüringer Landessternwarte Tautenburg
Hoare, M. G. (author)
University of Leeds
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 (creator_code:org_t)
2019-08-09
2019
English.
In: Nature Communications. - : Springer Science and Business Media LLC. - 2041-1723 .- 2041-1723. ; 10:1
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • 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.

Subject headings

NATURVETENSKAP  -- Fysik -- Subatomär fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Subatomic Physics (hsv//eng)
NATURVETENSKAP  -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
NATURVETENSKAP  -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)

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art (subject category)
ref (subject category)

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