DOI | Resolve DOI: https://doi.org/10.1088/0067-0049/213/1/13 |
---|
Author | Search for: Hull, Charles L. H.; Search for: Plambeck, Richard L.; Search for: Kwon, Woojin; Search for: Bower, Geoffrey C.; Search for: Carpenter, John M.; Search for: Crutcher, Richard M.; Search for: Fiege, Jason D.; Search for: Franzmann, Erica; Search for: Hakobian, Nicholas S.; Search for: Heiles, Carl; Search for: Houde, Martin; Search for: Hughes, A. Meredith; Search for: Lamb, James W.; Search for: Looney, Leslie W.; Search for: Marrone, Daniel P.; Search for: Matthews, Brenda C.1; Search for: Pillai, Thushara; Search for: Pound, Marc W.; Search for: Rahman, Nurur; Search for: Sandell, Goran; Search for: Stephens, Ian W.; Search for: Tobin, John J.; Search for: Vaillancourt, John E.; Search for: Volgenau, N. H.; Search for: Wright, Melvin C. H. |
---|
Affiliation | - National Research Council of Canada. National Science Infrastructure
|
---|
Format | Text, Article |
---|
Subject | ISM: magnetic fields; magnetic fields; polarization; stars: formation; stars: magnetic field; stars: protostars |
---|
Abstract | 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. |
---|
Publication date | 2014-07-03 |
---|
In | |
---|
Language | English |
---|
Peer reviewed | Yes |
---|
NPARC number | 21272764 |
---|
Export citation | Export as RIS |
---|
Report a correction | Report a correction (opens in a new tab) |
---|
Record identifier | e343aa6d-1a31-4d7a-b7c2-792ba5e89114 |
---|
Record created | 2014-12-03 |
---|
Record modified | 2020-04-22 |
---|