SIMBAD references

2008ApJ...688.1029M - Astrophys. J., 688, 1029-1049 (2008/December-1)

A radio and optical polarization study of the magnetic field in the Small Magellanic Cloud.

MAO S.A., GAENSLER B.M., STANIMIROVIC S., HAVERKORN M., McCLURE-GRIFFITHS N.M., STAVELEY-SMITH L. and DICKEY J.M.

Abstract (from CDS):

We present a study of the magnetic field of the Small Magellanic Cloud (SMC), carried out using radio Faraday rotation and optical starlight polarization data. Consistent negative rotation measures (RMs) across the SMC indicate that the line-of-sight magnetic field is directed uniformly away from us with a strength 0.19±0.06 µG. Applying the Chandrasekhar-Fermi method to starlight polarization data yields an ordered magnetic field in the plane of the sky of strength 1.6±0.4 µG oriented at a position angle 4°±12°, measured counterclockwise from the great circle on the sky joining the SMC to the Large Magellanic Cloud (LMC). We construct a three-dimensional magnetic field model of the SMC, under the assumption that the RMs and starlight polarization probe the same underlying large-scale field. The vector defining the overall orientation of the SMC magnetic field shows a potential alignment with the vector joining the center of the SMC to the center of the LMC, suggesting the possibility of a ``pan-Magellanic'' magnetic field. A cosmic-ray-driven dynamo is the most viable explanation of the observed field geometry, but has difficulties accounting for the observed unidirectional field lines. A study of Faraday rotation through the Magellanic Bridge is needed to further test the pan-Magellanic field hypothesis.

Abstract Copyright:

Journal keyword(s): Magnetic Fields - Polarization - Galaxies: Magellanic Clouds

VizieR on-line data: <Available at CDS (J/ApJ/688/1029): table3.dat>

Nomenclature: Table 3: [MGS2008] NNN N=70 among (Nos 005-139). Table 5: [MGS2008] Anon(N) (Nos Anon(1) and (2)).

Errata: erratum vol. 745, art. 199 (2012)

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

CDS comments: Objects 0198 and 0208 of table 3 are a misprint for objects 019 and 020, respectively, of table 4.

Simbad objects: 91

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