TADPOL: A 1.3 mm SURVEY OF DUST POLARIZATION IN STAR-FORMING CORES AND REGIONS
By C. L. H. Hull, R. Plambeck, W. Kwon, G. Bower, John M. Carpenter, R. Crutcher, J. Fiege, E. Franzmann, N. Hakobian, C. Heiles and 15 more. 2013
192 citations recorded by the source corpus.
We present λ 1.3 mm Combined Array for Research in Millimeter-wave Astronomy observations of dust polarization toward 30 star-forming cores and eight star-forming regions from the TADPOL survey. We show maps of all sources, and compare the ∼2.″5 resolution TADPOL maps with ∼20″ resolution polarization maps from single-dish submillimeter telescopes. Here we do not attempt to interpret the detailed B-field morphology of each object. Rather, we use average B-field orientations to derive conclusions in a statistical sense from the ensemble of sources, bearing in mind that these average orientations can be quite uncertain. We discuss three main findings. (1) A subset of the sources have consistent magnetic field (B-field) orientations between large (∼20″) and small (∼2.″5) scales. Those same sources also tend to have higher fractional polarizations than the sources with inconsistent large-to-small-scale fields. We interpret this to mean that in at least some cases B-fields play a role in regulating the infall of material all the way down to the ∼1000 AU scales of protostellar envelopes. (2) Outflows appear to be randomly aligned with B-fields; although, in sources with low polarization fractions there is a hint that outflows are preferentially perpendicular to small-scale B-fields, which suggests that in these sources the fields have been wrapped up by envelope rotation. (3) Finally, even at ∼2.″5 resolution we see the so-called polarization hole effect, where the fractional polarization drops significantly near the total intensity peak. All data are publicly available in the electronic edition of this article.
Subfields: Astronomy and Astrophysics
View Paper: https://www.semanticscholar.org/paper/2d6a4f8b653c10bf0f83cb47098721fb9022fcca
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In Astronomy and Astrophysics
Citations in the corpus
- MILLIMETER-WAVE POLARIZATION OF PROTOPLANETARY DISKS DUE TO DUST SCATTERING (2015, background): “It is widely believed that the polarization is due to the grain alignment with magnetic field, as analogous to the interpretations of star-forming regions (e.g., Girart et al. 2006, 2009; Hull et al. 2013, 2014).”
- THE VLA NASCENT DISK AND MULTIPLICITY SURVEY OF PERSEUS PROTOSTARS (VANDAM). II. MULTIPLICITY OF PROTOSTARS IN THE PERSEUS MOLECULAR CLOUD (2016, background): “Compact outflows originating from the two sources were identified by Hull et al. (2014), and they are in nearly orthogonal directions.”