J. D. Soler

BALLOON-BORNE SUBMILLIMETER POLARIMETRY of the VELA C MOLECULAR CLOUD: SYSTEMATIC DEPENDENCE of POLARIZATION FRACTION on COLUMN DENSITY and LOCAL POLARIZATION-ANGLE DISPERSION

We present results for Vela C obtained during the 2012 flight of the Balloon-borne Large Aperture Submillimeter nTelescope for Polarimetry. We mapped polarized intensity across almost the entire extent of this giant molecular ncloud, in bands centered at 250, 350, and 500 μm. In this initial paper, we show our 500 μmuf0a0data smoothed to a nresolution of 2 5 (approximately 0.5 pc). We show that the mean level of the fractional polarization puf0a0and most of nits spatial variations can be accounted for using an empirical three-parameter power-law fit, p μ N-0.45 S-0.60, nwhere Nuf0a0is the hydrogen column density and Suf0a0is the polarization-angle dispersion on 0.5 pc scales. The decrease nof puf0a0with increasing Suf0a0is expected because changes in the magnetic field direction within the cloud volume nsampled by each measurement will lead to cancellation of polarization signals. The decrease of puf0a0with increasing nNuf0a0might be caused by the same effect, if magnetic field disorder increases for high column density sightlines. nAlternatively, the intrinsic polarization efficiency of the dust grain population might be lower for material along nhigher density sightlines. We find no significant correlation between Nuf0a0and S. Comparison of observed nsubmillimeter polarization maps with synthetic polarization maps derived from numerical simulations provides a npromising method for testing star formation theories. Realistic simulations should allow for the possibility of nvariable intrinsic polarization efficiency. The measured levels of correlation among p, N, and Suf0a0provide points of ncomparison between observations and simulations

A New Limit on CMB Circular Polarization from SPIDER

We present a new upper limit on CMB circular polarization from the 2015 flight of SPIDER, a balloon-borne telescope designed to search for

Galactic interstellar filaments as probed by LOFAR and Planck

B

BFORE: The B-mode Foreground Experiment

-mode linear polarization from cosmic inflation. Although the level of circular polarization in the CMB is predicted to be very small, experimental limits provide a valuable test of the underlying models. By exploiting the non-zero circular-to-linear polarization coupling of the HWP polarization modulators, data from SPIDERs 2015 Antarctic flight provide a constraint on Stokes

The relation between the column density structures and the magnetic field orientation in the Vela C molecular complex

V

Submillimeter Polarization Spectrum in the Vela C Molecular Cloud

at 95 and 150 GHz from

Comparison of Prestellar Core Elongations and Large-scale Molecular Cloud Structures in the Lupus I Region

33<ell<307

What are we learning from the relative orientation between density structures and the magnetic field in molecular clouds

. No other limits exist over this full range of angular scales, and SPIDER improves upon the previous limit by several orders of magnitude, providing 95% C.L. constraints on

Galactic Supernova Remnant Candidates Discovered by THOR

ell (ell+1)C_{ell}^{VV}/(2pi)

Instrumental performance and results from testing of the BLAST-TNG receiver, submillimeter optics, and MKID detector arrays

ranging from 141