Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Dust in the outer layers of the Barnard 5 globule. / Il'in, V. B.; Efimov, Yu S.; Khudyakova, T. N.; Prokopjeva, M. S.; Varivoda, V. V.
в: Monthly Notices of the Royal Astronomical Society, Том 475, № 4, 21.04.2018, стр. 5535-5549.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Dust in the outer layers of the Barnard 5 globule
AU - Il'in, V. B.
AU - Efimov, Yu S.
AU - Khudyakova, T. N.
AU - Prokopjeva, M. S.
AU - Varivoda, V. V.
PY - 2018/4/21
Y1 - 2018/4/21
N2 - We present the results of our UBVRI polarimetric observations of a dozen stars located close to the well-studied Bok globule Barnard 5 (B5), with several of the stars being seen through its outer layers (with AV up to ~3mag). Using recent astrometric, spectroscopic and photometric surveys, we estimate the distance, spectral class and visual extinction for the observed stars and find that the results are in a good agreement with the available 3D extinction maps. We use a two-layer dust model of interstellar polarization towards B5, in which the layer closer to us is an extension of the Taurus cloud complex, and the farther one (including B5 and its halo) is related to the Perseus cloud complex (d ≈ 280-350 pc). Using spectral, photometric and polarimetric data on about 30 additional stars, we estimate the parameters of the former layer as λmax ≈ 0.56 μm, Pmax ≈ 0.7 per cent, θ ≈ 50°, AV ≈ 0.7 mag, and show that the observed wavelength dependence of the position angle for the stars observed generally agrees with the two-layer model.We find that when the stars are seen through the globule layers with AV = 2- 3mag, λmax ≈ 0.6-0.8 μm, which differs significantly from the λmax = 0.52-0.58 μm obtained by us for the diffuse interstellar medium in the direction of B5. We discuss the correlation of λmax with the optical thickness into the globule as well as other correlations of the extinction and polarization parameters.
AB - We present the results of our UBVRI polarimetric observations of a dozen stars located close to the well-studied Bok globule Barnard 5 (B5), with several of the stars being seen through its outer layers (with AV up to ~3mag). Using recent astrometric, spectroscopic and photometric surveys, we estimate the distance, spectral class and visual extinction for the observed stars and find that the results are in a good agreement with the available 3D extinction maps. We use a two-layer dust model of interstellar polarization towards B5, in which the layer closer to us is an extension of the Taurus cloud complex, and the farther one (including B5 and its halo) is related to the Perseus cloud complex (d ≈ 280-350 pc). Using spectral, photometric and polarimetric data on about 30 additional stars, we estimate the parameters of the former layer as λmax ≈ 0.56 μm, Pmax ≈ 0.7 per cent, θ ≈ 50°, AV ≈ 0.7 mag, and show that the observed wavelength dependence of the position angle for the stars observed generally agrees with the two-layer model.We find that when the stars are seen through the globule layers with AV = 2- 3mag, λmax ≈ 0.6-0.8 μm, which differs significantly from the λmax = 0.52-0.58 μm obtained by us for the diffuse interstellar medium in the direction of B5. We discuss the correlation of λmax with the optical thickness into the globule as well as other correlations of the extinction and polarization parameters.
KW - Dust
KW - Extinction
KW - ISM: clouds
KW - Polarization
KW - LAW
KW - MOLECULAR CLOUD
KW - LINEAR-POLARIZATION
KW - STAR-FORMING REGIONS
KW - INTERSTELLAR EXTINCTION
KW - dust, extinction
KW - TAURUS DARK CLOUDS
KW - POLARIMETRIC OBSERVATIONS
KW - PERSEUS
KW - GRAIN ALIGNMENT
KW - WAVELENGTH DEPENDENCE
KW - polarization
UR - http://www.scopus.com/inward/record.url?scp=85052507668&partnerID=8YFLogxK
UR - http://www.mendeley.com/research/dust-outer-layers-barnard-5-globule
U2 - 10.1093/mnras/sty010
DO - 10.1093/mnras/sty010
M3 - Article
AN - SCOPUS:85052507668
VL - 475
SP - 5535
EP - 5549
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
SN - 0035-8711
IS - 4
ER -
ID: 34864897