典型文献
The Relative Orientation between Local Magnetic Field and Galactic Plane in Low Latitude Dark Clouds
文献摘要：
In this work, we study the magnetic field morphology of selected star-forming clouds spread over the galactic latitude (b) range-10° to 10°. The polarimetric observations of clouds CB24, CB27 and CB188 are conducted to study the magnetic field geometry of those clouds using the 104 cm Sampurnanand Telescope (ST) located at ARIES, Manora Peak, Nainital, India. These observations are combined with those of 14 further low latitude clouds available in the literature. Most of these clouds are located within a distance range 140-500 pc except for CB3 (～2500 pc), CB34 (～1500 pc), CB39 (～1500 pc) and CB60 (～1500 pc). Analyzing the polarimetric data of 17 clouds, we find that the alignment between the envelope magnetic field (θBenv) and galactic plane (GP) (θGP) of the low-latitude clouds varies with their galactic longitudes (l). We observe a strong correlation between the longitude (l) and the offset (θoff=∣θenv B -θGP∣) which shows thatθenv B is parallel to the GP when the clouds are situated in the region 115°250°. To check the consistency of our results, the stellar polarization data available in the Heiles catalog are overlaid on the DSS image of the clouds having mean polarization vector of field stars. The results are almost consistent with the Heiles data. A systematic discussion is presented in the paper. The effect of turbulence in the cloud is also studied which may play an important role in causing the misalignment phenomenon observed betweenθBenv andθGP. We have used Herschel (Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.) SPIRE 500μm and SCUBA 850μm dust continuum emission maps in our work to understand the density structure of the clouds.
文献关键词：
中图分类号：
作者姓名：
Gulafsha B.Choudhury;Himadri S.Das;B.J.Medhi;J.C.Pandey;S.Wolf;T.K.Dhar;A.M.Mazarbhuiya
作者机构：
Department of Physics,Assam University,Silchar 788011,India;Department of Physics,Gauhati University,Guwahati 781014,India;Aryabhatta Research Institute of Observational Sciences(ARIES),Nainital 263002,India;University of Kiel,Institute of Theoretical Physics and Astrophysics,Leibnizstrasse 15,D-24118,Kiel,Germany
文献出处：
引用格式：
[1]Gulafsha B.Choudhury;Himadri S.Das;B.J.Medhi;J.C.Pandey;S.Wolf;T.K.Dhar;A.M.Mazarbhuiya-.The Relative Orientation between Local Magnetic Field and Galactic Plane in Low Latitude Dark Clouds)[J].天文和天体物理学研究,2022(07):84-98
A类：
CB24,CB27,CB188,Sampurnanand,ARIES,Manora,Nainital,CB3,CB34,CB39,CB60,Benv,longitudes,Heiles,SPIRE,SCUBA
B类：
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AB值：
0.478753
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