1.3 mm POLARIZED EMISSION IN THE CIRCUMSTELLAR DISK OF A MASSIVE PROTOSTAR
1.3 mm POLARIZED EMISSION IN THE CIRCUMSTELLAR DISK OF A MASSIVE PROTOSTAR
复制标题
大质量原恒星星盘中的 1.3 毫米偏振发射
DOI:
10.3847/0004-637x/832/2/200
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
S. Lai
中科院分区:
文献类型:
--
作者:
M. Fernández;I. Stephens;I. Stephens;I. Stephens;J. Girart;J. Girart;L. Looney;S. Curiel;D. Segura;C. Eswaraiah;S. Lai
We present the first resolved observations of the 1.3 mm polarized emission from the disk-like structure surrounding the high-mass protostar Cepheus A HW2. These CARMA data partially resolve the dust polarization, suggesting a uniform morphology of polarization vectors with an average position angle of 57 ° ± 6 ° and an average polarization fraction of 2.0 % ± 0.4 % . The distribution of the polarization vectors can be attributed to (1) the direct emission of magnetically aligned grains of dust by a uniform magnetic field, or (2) the pattern produced by the scattering of an inclined disk. We show that both models can explain the observations, and perhaps a combination of the two mechanisms produces the polarized emission. A third model including a toroidal magnetic field does not match the observations. Assuming scattering is the polarization mechanism, these observations suggest that during the first few 104 years of high-mass star formation, grain sizes can grow from 1 μ m to several 10s μm.
DOI:
10.1088/0004-637x/693/1/406
发表时间:
2008-11
期刊:
The Astrophysical Journal
影响因子:
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作者:
L. Moscadelli;Mark J. Reid;K. Menten;A. Brunthaler;X. Zheng;Ye Xu;Ye Xu
通讯作者:
L. Moscadelli;Mark J. Reid;K. Menten;A. Brunthaler;X. Zheng;Ye Xu;Ye Xu
DOI:
10.1088/0004-637x/703/2/l157
发表时间:
2009
期刊:
The Astrophysical Journal
影响因子:
--
作者:
Jiménez-Serra I
通讯作者:
Jiménez-Serra I