Ari Cukierman - Magnetic Misalignment of Interstellar Dust Filaments скачать в хорошем качестве

Ari Cukierman - Magnetic Misalignment of Interstellar Dust Filaments

Abstract: I'll present an investigation (arXiv:2208.07382) of misalignment between interstellar dust filaments and magnetic fields. Such misalignments can produce parity-violating signatures in polarized dust emission (observable, for example, as TB and EB cross-spectra). Parity violation of this kind would be an important input to magnetohydrodynamic models of the interstellar medium and also to measurements of cosmic birefringence in the cosmic microwave background, for which the dust polarization is a significant foreground. Using neutral hydrogen (HI) to identify filamentary structures and millimeter-wave polarization to infer the magnetic-field orientation, we find 1) a global misalignment angle of approximately 2 degrees, 2) a tendency for magnetic misalignment to be scale (multipole) independent and 3) that magnetic misalignment is predictive of the variation in dust TB and EB cross-spectra.