Results 61 to 70 of about 988 (180)

Interstellar Filament Detection and Characterization: Methods and Implications for Studies of the Magnetized Interstellar Medium

Galaxies
Filamentary structures are ubiquitous in the interstellar medium and play a key role in the evolution of molecular clouds and star formation. Their morphology and relative orientation with respect to magnetic fields have been widely used as a diagnostic ...
Dana Alina
doaj   +1 more source

Interstellar Polarization Survey. V. Galactic Magnetic Field Tomography of the Spiral Arms Using Optical and Near-infrared Starlight Polarization

The Astronomical Journal
Interstellar linear polarization occurs when starlight passes through elongated dust grains aligned by interstellar magnetic fields. The observed polarization can come from different dust structures along the line of sight (LOS).
Y. Angarita, M. J. F. Versteeg, M. Haverkorn, V. Pelgrims, C. V. Rodrigues, A. M. Magalhães, R. Santos-Lima, Koji S. Kawabata   +7 more
doaj   +1 more source

Sub-Alfvénic Turbulence: Magnetic-to-kinetic Energy Ratio, Modification of Weak Cascade, and Implications for Magnetic Field Strength Measurements

The Astrophysical Journal
We study the properties of sub-Alfvénic magnetohydrodynamic (MHD) turbulence, i.e., turbulence with Alfvén mach number M _A = V _L / V _A < 1, where V _L is the velocity at the injection scale and V _A is the Alfvén velocity.
A. Lazarian, Ka Wai Ho, Ka Ho Yuen, Ethan Vishniac   +3 more
doaj   +1 more source

Magnetic Fields in the Interstellar Medium

, 2017
The interstellar medium – the space between the stars in our Galaxy – is multiphase, turbulent, and magnetic. Magnetism in the interstellar medium is difficult to observe and to simulate, and the study of interstellar magnetic fields is riddled with open questions. In this Thesis we make progress in several important areas.
openaire   +2 more sources

Most-likely DCF Estimates of Magnetic Field Strength

The Astrophysical Journal
The Davis–Chandrasekhar–Fermi (DCF) method is widely used to evaluate magnetic fields in star-forming regions. Yet it remains unclear how well DCF equations estimate the mean plane-of-the-sky field strength in a map region. To address this question, five
Philip C. Myers, Ian W. Stephens, Simon Coudé   +2 more
doaj   +1 more source

The Huge Magnetic Toroids in the Milky Way Halo

The Astrophysical Journal
The magnetic fields in our Milky Way can be revealed by the distribution of Faraday rotation measures (RMs) of radio sources behind the Galaxy and of radio pulsars inside the Galaxy. Based on the antisymmetry of the Faraday sky in the inner Galaxy to the
J. Xu, J. L. Han
doaj   +1 more source

Evidence of a Thick Heliopause Boundary Layer Resulting from Active Magnetic Reconnection with the Interstellar Medium

The Astrophysical Journal
Voyager 1 and 2 data from the vicinity of the heliopause and very local interstellar medium are reexamined to better understand the confounding lack of rotation in the magnetic field ( B -field) across the heliopause observed by both Voyagers, despite ...
Drew L. Turner, Adam Michael, Elena Provornikova, Marc Kornbleuth, Merav Opher, Stefan Eriksson, Benoit Lavraud, Parisa Mostafavi, Matthew E. Hill, Pontus Brandt, Ian J. Cohen, Joseph Westlake, John D. Richardson, Nathan A. Schwadron, David J. McComas   +14 more
doaj   +1 more source

Infrared polarimetry and the interstellar magnetic field

The Astrophysical Journal, 1989
Une bonne correlation entre la polarisation interstellaire et l'extinction interstellaire est trouvee a 2,2 μm pour toutes les lignes de visee. Un modele de champ magnetique interstellaire est presente, et montre qu'une contribution egale de la composante uniforme et de la composante aleatoire reproduit bien les ...
openaire   +1 more source

When Magnetic Fields Sculpt the Sky: The Riegel–Crutcher Cloud in Optical Polarization

The Astrophysical Journal
Filamentary structures are ubiquitous in the interstellar medium, yet the extent to which magnetic fields influence the morphology of cold atomic gas remains an open question.
Gabriel A. P. Franco, Mayara Gomides, Zhi-Yun Li, Fábio P. Santos, Farideh S. Tabatabaei   +4 more
doaj   +1 more source

Anisotropic Diffusion in Pulsar Halos: Interpreting the Asymmetric Morphology of Geminga and Monogem Halos Measured by HAWC

The Astrophysical Journal
Pulsar halos are produced by electrons and positrons diffusing in the interstellar medium around their parent pulsar wind nebulae. Recent observations by High Altitude Water Cherenkov Observatory and Large High Altitude Air Shower Observatory have ...
Si-Zhe Wu, Chao-Ming Li, Ruo-Yu Liu
doaj   +1 more source