Results 91 to 100 of about 247 (167)

Interstellar Polarization Survey. IV. Characterizing the Magnetic Field Strength and Turbulent Dispersion Using Optical Starlight Polarization in the Diffuse Interstellar Medium

The Astronomical Journal
Angular dispersion functions are typically used to estimate the fluctuations in polarization angle around the mean magnetic field orientation in dense regions, such as molecular clouds.
Y. Angarita, M. J. F. Versteeg, M. Haverkorn, A. Marchal, C. V. Rodrigues, A. M. Magalhães, R. Santos-Lima, Koji S. Kawabata   +7 more
doaj   +1 more source

A 3D Model of the Local Bubble’s Magnetic Field: Insights from Dust and Starlight Polarization

The Astrophysical Journal
Clustered stellar feedback creates expanding voids in the magnetized interstellar medium known as superbubbles. Although theory suggests that superbubble expansion is influenced by interstellar magnetic fields, direct observational data on 3D superbubble
Theo J. O’Neill, Alyssa A. Goodman, Juan D. Soler, Catherine Zucker, Jiwon Jesse Han   +4 more
doaj   +1 more source

Magnetic Fields in the Southern Coalsack and Beyond

The Astronomical Journal
Starlight polarimetry, when combined with accurate distance measurements, allows for exploration of the three-dimensional structure of local magnetic fields in great detail.
M. J. F. Versteeg, Y. Angarita, A. M. Magalhães, M. Haverkorn, C. V. Rodrigues, R. Santos-Lima, Koji S. Kawabata   +6 more
doaj   +1 more source

Tomography of ultrarelativistic nuclei with polarized photon-gluon collisions. [PDF]

Sci Adv, 2023
STAR Collaboration.
europepmc   +1 more source

Variable Linear Polarization across Optical Emission Lines of the Wolf–Rayet Star EZ Canis Majoris and Its Relation to Corotating Interaction Regions

The Astrophysical Journal
Structure can be found on all scales in the winds of hot, luminous stars, including Wolf–Rayet (W-R) stars. Large-scale, spiral-shaped corotating interaction regions (CIRs) are thought to be present, causing quasi-periodic variability.
L. Fabiani, N. St-Louis, A. F. J. Moffat, A-N. Chené, R. Ignace   +4 more
doaj   +1 more source

Characterization of a half wave plate and a polarizer for accurate starlight polarimetry

Experimental Astronomy
Abstract In the process of developing a space-based imaging Stokes polarimeter for starlight polarization measurements, we established a procedure to characterize its two main optical components: the wave plate and the polarizer.
de Bernardis P., Masi S., Barbieri Ripamonti G., Columbro F.   +3 more
openaire   +1 more source

Spectropolarimetric Evolution Reveals Dual-axis Ejecta in the Atypical Magnetar-powered SN 2012au

The Astrophysical Journal
We present six epochs of optical spectropolarimetric observations of the unique and slow-evolving Type Ib supernova (SN) 2012au, between 0 and 295 day post- R -band maximum.
Sabrina DeSoto, Jennifer L. Hoffman, G. Grant Williams, Christopher Bilinski, Douglas C. Leonard, Peter A. Milne, Christopher Pickens, Manisha Shrestha, Nathan Smith, Paul S. Smith   +9 more
doaj   +1 more source

A 3D Attitude Estimation Method Based on Attitude Angular Partial Feedback for Polarization-Based Integrated Navigation System. [PDF]

Sensors (Basel), 2022
Hu P, Huang P, Qiu Z, Yang J, Liu X.
europepmc   +1 more source

The Spheroidal Analog Method for Modeling Irregular Porous Aggregates

The Astrophysical Journal
It is shown that the optical properties of an irregular porous grain with effective radius a _eff  ≲ 3 λ (where λ is the wavelength) can be well approximated by a “spheroidal analog”: a spheroid with appropriate axial ratio and size, with a dielectric ...
B. T. Draine
doaj   +1 more source

Setting Boundaries for Statistical Mechanics. [PDF]

Molecules, 2022
Eisenberg B.
europepmc   +1 more source