2020MNRAS.496.2762F

Query : 2020MNRAS.496.2762F

2020MNRAS.496.2762F - Mon. Not. R. Astron. Soc., 496, 2762-2767 (2020/August-2)

High circular polarization of near-infrared light induced by micron-sized dust grains.

FUKUSHIMA H., YAJIMA H. and UMEMURA M.

Abstract (from CDS):

We explore the induction of circular polarization (CP) of near-infrared light in star-forming regions using three-dimensional radiative transfer calculations. The simulations trace the change of Stokes parameters at each scattering/absorption process in a dusty gas slab composed of aligned grains. We find that the CP degree enlarges significantly according as the size of dust grains increases and exceeds ∼20 per cent for micron-sized grains. Therefore, if micron-sized grains are dominant in a dusty gas slab, the high CP observed around luminous young stellar objects can be accounted for. The distributions of CP show the asymmetric quadrupole patterns regardless of the grain sizes. Also, we find that the CP degree depends on the relative position of a dusty gas slab. If a dusty gas slab is located behind a star-forming region, the CP reaches ∼60 per cent in the case of 1.0 um dust grains. Hence, we suggest that the observed variety of CP maps can be explained by different size distributions of dust grains and the configuration of aligned grains.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): astrobiology - polarization - stars: formation - dust, extinction - ISM: structure - infrared: stars

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME NGC 6334 FIR V Cl* 17 19 57 -35 57.5           ~ 99 0

Query : 2020MNRAS.496.2762F

Basic data :
NAME NGC 6334 FIR V -- Cluster of Stars
Other object types: otypes_help 		Cl* (2013A&A,[BDB2003]), IR (MFSW)
ICRS coord. (ep=J2000) : 		17 19 57.0 -35 57 30 [ ] E 2003A&A...397..177B
FK4 coord. (ep=B1950 eq=1950) : 		17 16 35.6 -35 54 28 [ ]
Gal coord. (ep=J2000) : 		351.1648 +00.7017 [ ]
Angular size (arcmin): 		2.95 2.95 90 (~) D 2013A&A...560A..76M
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Hierarchy : number of linked objects
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Identifiers (6) :
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NAME NGC 6334 FIR V NAME NGC 6334-V NGC 6334V
MFSW V NAME 6334-V [BDB2003] G351.16+00.70

References (99 between 1850 and 2026) (Total 99)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Data at NED - NASA/IPAC Extragalactic Database : NAME NGC 6334 FIR V

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