The magnetic field and dust filaments in the Polaris Flare

@article{Panopoulou2016TheMF,
  title={The magnetic field and dust filaments in the Polaris Flare},
  author={Georgia V. Panopoulou and I. Psaradaki and Konstantinos Tassis},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2016},
  volume={462},
  pages={1517-1529}
}
In diffuse molecular clouds, possible precursors of star-forming clouds, the effect of the magnetic field is unclear. In this work we compare the orientations of filamentary structures in the Polaris Flare, as seen through dust emission by Herschel, to the plane-of-the-sky magnetic field orientation ($\rm B_{pos}$) as revealed by stellar optical polarimetry with RoboPol. Dust structures in this translucent cloud show a strong preference for alignment with $\rm B_{pos}$. 70 % of field… 

From parallel to perpendicular – On the orientation of magnetic fields in molecular clouds

We present synthetic dust polarization maps of simulated molecular clouds (MCs) with the goal to systematically explore the origin of the relative orientation of the magnetic field ($\bf{B}$) with

Dust polarization studies on MHD simulations of molecular clouds: comparison of methods for the relative-orientation analysis

Context. The all-sky survey from the Planck space telescope has revealed that thermal emission from Galactic dust is polarized on scales ranging from the whole sky down to the inner regions of

The SILCC project – V. The impact of magnetic fields on the chemistry and the formation of molecular clouds

Magnetic fields are ubiquitously observed in the interstellar medium (ISM) of present-day star-forming galaxies with dynamically relevant energy densities. Using three-dimensional

Magnetic Field Tomography in Two Clouds toward Ursa Major Using H i Fibers

The atomic interstellar medium (ISM) is observed to be full of linear structures that are referred to as “fibers.” Fibers exhibit similar properties to linear structures found in molecular clouds

The role of the magnetic field in a translucent molecular cloud

  • G. Panopoulou
  • Physics
    Proceedings of the International Astronomical Union
  • 2018
Abstract Translucent molecular clouds represent a vastly underexplored regime of cloud evolution in terms of the effect of the magnetic field. Their pristine nature renders them ideal for

Dust Polarization toward Embedded Protostars in Ophiuchus with ALMA. II. IRAS 16293-2422

We present high-resolution (∼35 au) ALMA Band 6 1.3 mm dust polarization observations of IRAS 16293. These observations spatially resolve the dust polarization across the two protostellar sources and

Dense Gas Kinematics and a Narrow Filament in the Orion A OMC1 Region Using NH3

We present combined observations of the (J, K) = (1, 1) and (2, 2) inversion transitions toward OMC1 in Orion A obtained by the Karl G. Jansky Very Large Array and the 100 m Robert C. Byrd Green Bank

Striations in molecular clouds: streamers or MHD waves?

Dust continuum and molecular observations of the low column density parts of molecular clouds have revealed the presence of elongated structures which appear to be well aligned with the magnetic

Submillimeter and Far-Infrared Polarimetric Observations of Magnetic Fields in Star-Forming Regions

Observations of star-forming regions by the current and upcoming generation of submillimeter polarimeters will shed new light on the evolution of magnetic fields over the cloud-to-core size scales

Quantifying the interplay between gravity and magnetic field in molecular clouds – a possible multiscale energy equipartition in NGC 6334

The interplay between gravity, turbulence and the magnetic field determines the evolution of the molecular interstellar medium (ISM) and the formation of the stars. In spite of growing interests,

References

SHOWING 1-10 OF 63 REFERENCES

Planck intermediate results XXXII. The relative orientation between the magnetic field and structures traced by interstellar dust

The role of the magnetic field in the formation of the filamentary structures observed in the interstellar medium (ISM) is a debated topic owing to the paucity of relevant observations needed to test

The link between magnetic fields and filamentary clouds: bimodal cloud orientations in the Gould Belt

The orientations of filamentary molecular clouds in the Gould Belt and their local intercloud media (ICM) magnetic fields are studied using near-infrared dust extinction maps and optical stellar

TRACING THE MAGNETIC FIELD MORPHOLOGY OF THE LUPUS I MOLECULAR CLOUD

Deep R-band CCD linear polarimetry collected for fields with lines of sight toward the Lupus I molecular cloud is used to investigate the properties of the magnetic field within this molecular cloud.

THE MAGNETIC FIELD IN TAURUS PROBED BY INFRARED POLARIZATION

We present maps of the plane-of-sky magnetic field within two regions of the Taurus molecular cloud: one in the dense core L1495/B213 filament and the other in a diffuse region to the west. The field

Matching dust emission structures and magnetic field in high-latitude cloud L1642: comparing Herschel and Planck maps

The nearby cloud L1642 is one of only two known very high latitude (|b| > 30 deg) clouds actively forming stars. It is a rare example of star formation in isolated conditions, and can reveal

Optical polarization map of the Polaris Flare with RoboPol

The stages before the formation of stars in molecular clouds are poorly understood. Insights can be gained by studying the properties of quiescent clouds, such as their magnetic field structure. The

Optical polarimetry toward the Pipe nebula: revealing the importance of the magnetic field

Context. Magnetic fields are proposed to play an important role in the formation and support of self-gravitating clouds and the formation and evolution of protostars in such clouds. Aims. We attempt

Polarized Submillimeter Emission from Filamentary Molecular Clouds

We model the submillimeter polarization patterns that are expected for filamentary clouds that are threaded by helical magnetic fields. We previously developed a three-parameter model of such clouds,

Optical polarization maps of star-forming regions in Perseus, Taurus, and Ophiuchus

New optical linear polarization maps are presented of the star-forming regions near L1506 in Taurus, L1755 in Ophiuchus, and the complex of dark cloud which extends from L1448 in B5 in Perseus. The

Magnetic Fields in Star-forming Molecular Clouds. II. The Depolarization Effect in the OMC-3 Filament of Orion A

Polarized 850 μm thermal emission data of the region OMC-3 in the Orion A molecular cloud are presented. These data, taken in 1998 with the SCUBA polarimeter mounted on the James Clerk Maxwell
...