Tracing the magnetic field morphology of the LDN 1172/1174 cloud complex
arXiv:2106.14887 · doi:10.1051/0004-6361/202039948
Abstract
The LDN 1172/1174 cloud complex in the Cepheus Flare region presents a hub-filament structure with the reflection nebula, NGC 7023, illuminated by a Herbig Be star, HD 200775, which consists of the hub with a 5 pc long narrow filament attached to it. Formation of a sparse cluster of low- and intermediate-mass stars is presently taking place in the hub. The aim of this work is to map the magnetic field geometry of LDN 1172/1174 to understand the role played by the field lines in the formation of the molecular cloud. We made R-band polarization measurements of 249 stars projected on the entire LDN 1172/1174 cloud complex to map the geometry of the magnetic field of this region. The magnetic field geometry constructed from our R-band polarization measurements is found to be parallel to the elongated structure inferred from the column density distribution of the cloud produced using the Herschel images. Our R-band polarization measurements are found to be in good agreement with those obtained from Planck. There is evidence of a possible distortion of the magnetic fields toward the northwestern part of the cloud by HD 200775. The magnetic field strength is estimated as 30 G. The estimated star formation rate (SFR)/mass of 2.01.3 \%Myr and 0.40.3 \%Myr for LDN 1172/1174 and the neighboring cloud complex, LDN 1147/1158, respectively, are found to be consistent with the mean SFR/mass found for the clouds with magnetic field orientations parallel and perpendicular to their elongated structures, respectively. These results support earlier findings that the clouds with magnetic field lines parallel to their long axes seem to have higher SFRs compared to those with the magnetic field orientation perpendicular to the cloud elongation.
References in corpus (31)
- Filamentary structure of star-forming complexes
- Radiative torques: Analytical Model and Basic Properties
- Planck intermediate results. XIX. An overview of the polarized thermal emission from Galactic dust
- Magnetically Regulated Star Formation in 3D: The Case of Taurus Molecular Cloud Complex
- Evolution of emission line activity in intermediate mass young stars
- Rapid directional alignment of velocity and magnetic field in magnetohydrodynamic turbulence
- Formation of Magnetized Prestellar Cores with Ambipolar Diffusion and Turbulence
- Optical polarimetry toward the Pipe nebula: Revealing the importance of the magnetic field
- Filamentary Accretion Flows in the Infrared Dark Cloud G14.225-0.506 Revealed by ALMA
- Using Herschel and Planck observations to delineate the role of magnetic fields in molecular cloud structure
- Magnetized filamentary gas flows feeding the young embedded cluster in Serpens South
- Submillimeter Array Observations of Magnetic Fields in G240.31+0.07: an Hourglass in a Massive Cluster-forming Core
- Polarization measurements analysis I. Impact of the full covariance matrix on polarization fraction and angle measurements
- The Importance of the Magnetic Field from an SMA-CSO-Combined Sample of Star-Forming Regions
- Core and filament formation in magnetized, self-gravitating isothermal layers
- The Role of Turbulence and Magnetic Fields in Simulated Filamentary Structure
- Are fibres in molecular cloud filaments real objects?
- Striations in molecular clouds: Streamers or MHD waves?
- Striations in the Taurus molecular cloud: Kelvin-Helmholtz instability or MHD waves?
- Optical polarimetric study of open clusters: Distribution of Interstellar matter towards NGC 654
- Far-infrared observations of a massive cluster forming in the Monoceros R2 filament hub
- Herschel Gould Belt Survey Observations of Dense Cores in the Cepheus Flare Clouds
- Magnetic fields in cometary globules - IV. LBN 437
- Filaments and striations: anisotropies in observed, supersonic, highly-magnetised turbulent clouds
- The Link between Magnetic-field Orientations and Star Formation Rates
- Magnetic field structure of IC 63 and IC 59 associated to H II region - Sh 185
- A census of young stellar population associated with the Herbig Be star HD 200775
- Understanding the links among magnetic fields, filament, the bipolar bubble, and star formation in RCW57A using NIR polarimetry
- First Sub-pc Sale Mapping of Magnetic Fields in the Vicinity of a Very Low Luminosity Object, L1521F-IRS
- Distance, magnetic field and kinematics of a filamentary cloud LDN 1157
- The link between magnetic fields and filamentary clouds II: Bimodal linear mass distributions