Karoly, Janik;
Ward-Thompson, Derek;
Pattle, Kate;
Berry, David;
Whitworth, Anthony;
Kirk, Jason;
Bastien, Pierre;
... van Loo, Sven; + view all
(2023)
The JCMT BISTRO Survey: Studying the Complex Magnetic Field of L43.
The Astrophysical Journal
, 952
(1)
, Article 29. 10.3847/1538-4357/acd6f2.
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Abstract
We present observations of polarized dust emission at 850 μm from the L43 molecular cloud, which sits in the Ophiuchus cloud complex. The data were taken using SCUBA-2/POL-2 on the James Clerk Maxwell Telescope as a part of the BISTRO large program. L43 is a dense (NH 10 22 2 ~ –1023 cm−2) complex molecular cloud with a submillimeter-bright starless core and two protostellar sources. There appears to be an evolutionary gradient along the isolated filament that L43 is embedded within, with the most evolved source closest to the Sco OB2 association. One of the protostars drives a CO outflow that has created a cavity to the southeast. We see a magnetic field that appears to be aligned with the cavity walls of the outflow, suggesting interaction with the outflow. We also find a magnetic field strength of up to ∼160 ± 30 μG in the main starless core and up to ∼90 ± 40 μG in the more diffuse, extended region. These field strengths give magnetically super- and subcritical values, respectively, and both are found to be roughly trans-Alfvénic. We also present a new method of data reduction for these denser but fainter objects like starless cores.
| Type: | Article |
|---|---|
| Title: | The JCMT BISTRO Survey: Studying the Complex Magnetic Field of L43 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.3847/1538-4357/acd6f2 |
| Publisher version: | https://doi.org/10.3847/1538-4357/acd6f2 |
| Language: | English |
| Additional information: | Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence (http://creativecommons.org/licenses/by/4.0/). Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10174518 |
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