2020 Fiscal Year Research-status Report
Using magnetic fields to probe the core-fragmentation model of binary formation
| Project/Area Number |
18K13586
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| Research Institution | National Astronomical Observatory of Japan |
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Principal Investigator |
HULL CHARLES 国立天文台, チリ観測所, 特任助教 (70814755)
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| Project Period (FY) |
2018-04-01 – 2022-03-31
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| Keywords | Star formation / Radio astronomy / Binary stars / Protostars / Polarization / Magnetic fields / Dust |
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| Outline of Annual Research Achievements |
The primary research goals of this program were achieved at the very beginning of FY2020 with the publication of the paper on the ALMA observations of the forming binary protostar BHR 71 (Hull et al. 2020a, ApJ, 892, 152). Our new, ongoing work focus on studying polarization and magnetic fields in a much larger sample of protostars. The main new, relevant project is an ALMA study (on which I am one of the main co-investigators) of polarization in binary/multiple protostars in Orion. The analysis of those data are underway, with the first publications expected to come out in late FY2021.
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| Current Status of Research Progress |
Current Status of Research Progress
1: Research has progressed more than it was originally planned.
Reason
We have achieved the main goals of this grant, and are now continuing on with similar studies in much larger samples of sources (see the description above regarding the study of magnetic fields in a sample of binary/multiple protostars in Orion).
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| Strategy for Future Research Activity |
The main relevant work going on in my group is on ALMA observations of magnetic fields in binary/multiple protostars. The data have been calibrated, and we have moved into the imaging phase. The plans over the next fiscal year are to perfect the imaging scripts, image all of the data (both the magnetic fields via the polarized dust emission, as well as several spectral lines), and start drafting the overview/survey paper.
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| Causes of Carryover |
The main reason why expenditure was so low in FY2020 was because of the coronavirus pandemic. Assuming the situation improves, the remaining funding in this grant will be used to support ongoing work relevant to this project -- in particular travel expenses for conferences and collaborator visits.
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[Journal Article] A statistical analysis of dust polarization properties in ALMA observations of Class 0 protostellar cores2020
Author(s)
Le Gouellec, V. J. M.; Maury, A. J.; Guillet, V.; Hull, C. L. H.; Girart, J. M.; Verliat, A.; Mignon-Risse, R.; Valdivia, V.; Hennebelle, P.; Gonzalez, M.; Louvet, F.
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Journal Title
Astronomy & Astrophysics
Volume: 644
Pages: 11
DOI
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Outflows, cores, and magnetic field orientations in W43-MM1 as seen by ALMA2020
Author(s)
Arce-Tord, C.; Louvet, F.; Cortes, P. C.; Motte, F.; Hull, C. L. H.; Le Gouellec, V. J. M.; Garay, G.; Nony, T.; Didelon, P.; Bronfman, L.
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Journal Title
Astronomy & Astrophysics
Volume: 640
Pages: 111
DOI
Peer Reviewed / Open Access / Int'l Joint Research
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