ARE MAGNETIC FIELDS AND OUTFLOWS ALIGNED IN PROTOSTELLAR CORES? Chat Hull University of California, Berkeley Radio Astronomy Laboratory 4 April 2013 Institute.

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ARE MAGNETIC FIELDS AND OUTFLOWS ALIGNED IN PROTOSTELLAR CORES? Chat Hull University of California, Berkeley Radio Astronomy Laboratory 4 April 2013 Institute for Astronomy University of Hawai’i at Manoa Honolulu, Hawai’i

Credit: Bill Saxton, Harvard-Smithsonian Center for Astrophysics

Girart Rao Outflow B-field IRAS IRAS 4A Misalignment of B-fields and outflows

CARMA Combined Array for Research in Millimeter-wave Astronomy Consortium: Berkeley, Caltech, Illinois, Maryland, Chicago – 6 10-m, 9 6-m, m telescopes – Observations at 1 cm, 3 mm, and 1 mm (polarization!) – Located in Cedar Flat, CA (near Bishop)

Orthomode transducer SIS mixers WBA13 I.F. amplifiers (1-9 GHz ) 1 mm dual-polarization receivers 1 inch Credit: Dick Plambeck Waveguide circular polarizer

TADPOL survey 35 sources Triples number of interferometric polarization maps ~300 observing hours CARMA C, D, & E arrays 1 – 4" resolution 10 higher resolution than CSO & JCMT Probes intermediate region between ~0.1 pc (single-dish) and ~100 AU (ALMA) 1 mm wavelength Ideal for dust polarization, as well as CO(2-1) for outflow mapping

TADPOL collaboration UC Berkeley Chat Hull (PI), Dick Plambeck, Mel Wright, Carl Heiles, Geoff Bower University of Maryland Marc Pound, Alberto Bolatto, Katherine Jameson, Lee Mundy Caltech Thushara Pillai, John Carpenter, James Lamb, Nikolaus Volgenau University of Illinois, Urbana-Champagne Ian Stephens, Leslie Looney, Woojin Kwon, Dick Crutcher, Nick Hakobian Other Dan Marrone (Arizona), Meredith Hughes (Wesleyan), John Vaillancourt & Göran Sandell (USRA-SOFIA), John Tobin (NRAO), Jason Fiege (Manitoba), Erica Franzmann (Manitoba), Martin Houde (UWO, Caltech), Brenda Matthews (NRC-CNRC)

TADPOL results L1157 See also: Stephens, Looney, Kwon, Hull et al. 2013, ApJL, submitted

NGC 1333-IRAS 2ANGC 1333-IRAS 4A TADPOL results

NGC 1333-IRAS 4B Ser-emb 8 TADPOL results

Cumulative Distribution Function (CDF) (Projected) angle between outflow & B-field (deg) Outflow vs. B-field: distribution Hull+ 2013, ApJ, accepted Preprint: arXiv: arXiv: Simulation: outflows & B-fields aligned within a 20º cone (tightly aligned) Simulation: outflows & B-fields are randomly oriented KS-test results: 20º cone ruled out ( p-value ~ ) Misaligned ( 0.79 ) and random ( 0.64 ) cannot be ruled out Simulation: outflows & B-fields aligned between 70–90º (preferentially misaligned)

B-fields are either preferentially misaligned (perp.) or randomly aligned with outflows at the ~1000 AU scale Thus, circumstellar disks are misaligned with fields in the cores from which they formed More polarization science with CARMA Comparing polarization in filaments with ALMA data SgrA* (rotation measure, G2 cloud) Upper limits on disk polarization (Hughes, Hull+ 2013, AJ, 145, 115) Disk formation and B-field/rotation misalignment (Krumholz, Crutcher, & Hull 2013, ApJL, 767, L11) TADPOL results: arXiv: arXiv: TADPOL survey (CARMA key project): tadpol.astro.illinois.edutadpol.astro.illinois.edu Questions? Summary

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