English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present high-sensitivity ($\sigma_I\sim0.2-0.5$ mJy, $\sigma_{QU}\sim0.05$mJy), high-resolution (0.12-0.2 arcsec) observations of polarized 872 $\mu$mdust emission from the young multiple system VLA 1623 in $\rho$ Ophiuchus andthe protostar L1527 in Taurus. We detect the circumstellar material of VLA1623A, the extended Keplerian disk surrounding VLA 1623A which we call VLA1623CBdisk, VLA 1623B, VLA 1623W, and L1527 strongly in the polarized emission,at the $\sim1-3\%$ level. We spatially resolve VLA 1623A into two sources, VLA1623Aa and VLA 1623Ab, separated by $\sim30$ au and located within a cavity ofradius $\sim50$ au within the circumbinary Keplerian disk, as well as theedge-on disk of VLA 1623W. The polarization angle of the emission is uniformacross each protostellar source and nearly coincides with each disk's minoraxis. The offsets between the minor axis and the polarization angle are notuniformly distributed at the $P\lesssim2\times10^{-4}$ level. The circumbinarydisk surrounding VLA 1623Aab is azimuthally symmetrically polarized. Eachcompact source's emission is partially optically thick ($\tau\gtrsim1$) at 872$\mu$m, complicating interpretations of polarization involving aligned grains.We find evidence against alignment by radiative flux in each source,particularly in the edge-on VLA 1623W and L1527. We detect astrometric offsetsbetween the polarized emission and the total intensity in VLA 1623Aa, VLA1623Ab, and VLA 1623B, as predicted if self-scattering in the optically thicklimit operates. We conclude that self-scattering is likely responsible fordisk-scale polarization at 872 $\mu$m in these systems.

ALMA Observations of Polarized 872 $\mu$m Dust Emission from the Protostellar Systems VLA 1623 and L1527