Probing the magnetic fields in L1415 and L1389

Abstract

We present the R-band polarimetric results towards two nebulae L1415 and L1389 containing low luminosity stars. Aim of this study is to understand the role played by magnetic fields in formation of low luminosity objects. Linear polarization arise due to dichroism of the background starlight projected on the cloud providing the plane-of-the sky magnetic field orientation. The offsets between mean magnetic field directions obtained towards L1415 and L1389 and the projected outflow axes are found to be 35${}^{\circ }$ and 12${}^{\circ }$, respectively. The offset between cloud minor axes and mean envelope magnetic field direction in L1415 and L1389 are 50${}^{\circ }$ and 87${}^{\circ }$, respectively. To estimate the magnetic field strength by using the updated Chandrasekhar-Fermi relation, we obtained the ${}^{12}$CO(J=1-0) line velocity dispersion value towards L1415 cloud using the TRAO single dish observations. The values of B${}_{pos}$ in L1415 and L1389 are found to be 28$\mu$G and 149$\mu$G using CF technique and 23$\mu$G and 140$\mu$G using structure function analysis, respectively. The values of B${}_{pos}$ in these clouds are found to be consistent using both the techniques. By combining the present results with those obtained from our previous study of magnetic fields in cores with VeLLOs, we attempt to improve the sample of cores with low luminosity protostars and bridge the gap between the understanding of importance of magnetic fields in cores with VeLLOs and low luminosity protostars. The Results of this work and that of our previous work show that the outflow directions are aligned with envelope magnetic fields of the clouds.

arXiv comment18 pages, 11 figures, accepted for publication in MNRAS

References in corpus (47)

• Validation of the new Hipparcos reduction
• Control of star formation by supersonic turbulence
• Density, Velocity, and Magnetic Field Structure in Turbulent Molecular Cloud Models
• 9286 Stars: An Agglomeration of Stellar Polarization Catalogs
• Planck intermediate results. XIX. An overview of the polarized thermal emission from Galactic dust
• Tracing Magnetic Fields with Aligned Grains
• The Evolution of Outflow-Envelope Interactions in Low-Mass Protostars
• A study of high velocity molecular outflows with an up-to-date sample
• PROSAC: A Submillimeter Array Survey of Low-Mass Protostars. I. Overview of Program: Envelopes, Disks, Outflows and Hot Cores
• Dispersion of Magnetic Fields in Molecular Clouds. I
• Dispersion of Magnetic Fields in Molecular Clouds. II
• Studies of regular and random magnetic fields in the ISM: statistics of polarization vectors and the Chandrasekhar-Fermi technique
• Magnetic Field Diagnostics Based on Far-Infrared Polarimetry: Tests Using Numerical Simulations
• The earliest phases of star formation - A Herschel key project. The thermal structure of low-mass molecular cloud cores
• Molecular line study of the very young protostar IRAM 04191 in Taurus: Infall, rotation, and outflow
• The Spitzer c2d Survey of Nearby Dense Cores: II: Discovery of a Low Luminosity Object in the "Evolved Starless Core" L1521F
• Directions of Outflows, Disks, Magnetic Fields, and Rotation of YSOs in Collapsing Molecular Cloud Cores
• Magnetic Fields via Polarimetry: Progress of Grain Alignment Theory
• The role of turbulent magnetic reconnection on the formation of rotationally supported protostellar disks
• Grain Alignment by Radiative Torques in Special Conditions and Implications
• The Virial Balance of Clumps and Cores in Molecular Clouds
• First results from the Herschel Gould Belt Survey in Taurus
• The enigmatic core L1451-mm: a first hydrostatic core? or a hidden VeLLO?
• Anchoring Magnetic Field in Turbulent Molecular Clouds
• Magnetic Fields and the Triaxiality of Molecular Cloud Cores
• Alignment Between Flattened Protostellar Infall Envelopes and Ambient Magnetic Fields
• Detailed Interstellar Polarimetric Properties of the Pipe Nebula at Core Scales
• Discovery of a Low Mass Bipolar Molecular Outflow from L1014-IRS with the Submillimeter Array
• A Sino-German lambda6 cm polarization survey of the Galactic plane I. Survey strategy and results for the first survey region
• Interferometric Mapping of Magnetic Fields in Star-forming Regions I. W51 e1/e2 Molecular Cores
• Magnetic field evolution in Bok globules
• The Angular Momentum of Magnetized Molecular Cloud Cores: A 2D-3D Comparison
• The alignment of molecular cloud magnetic fields with the spiral arms in M33
• On the alignment of classical T Tauri stars with the magnetic field in the Taurus-Auriga molecular cloud
• Looking into the hearts of Bok globules: MM and submm continuum images of isolated star-forming cores
• An Imaging Polarimeter(IMPOL) for multi-wavelength observations
• SMA and Spitzer Observations of Bok Glouble CB17: A Candidate First Hydrostatic Core?
• Direct Imaging of a Compact Molecular Outflow from a Very Low-luminosity Object; L1521F-IRS
• Modeling Grain Alignment by Radiative Torques and Hydrogen Formation Torques in Reflection Nebula
• Magnetic field structure around cores with very low luminosity objects
• Correlating the interstellar magnetic field with protostellar jets and its sources
• Magnetic fields in cometary globules - IV. LBN 437
• Grain Growth in the Dark Cloud L1251
• The extinction law for molecular clouds. Case study of B 335
• Magnetic field geometry of an unusual cometary cloud Gal 110-13
• A Systematic Search for Molecular Outflows Toward Candidate Low-Luminosity Protostars and Very Low Luminosity Objects
• The new nebula in LDN 1415 - A cry from the cradle of a low-luminosity source

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