@Article{GomesMagaPereRodr:2015:MaFiSt,
author = "Gomes, Aiara Lobo and Magalh{\~a}es, Ant{\^o}nio M{\'a}rio and
Pereyra, Antonio and Rodrigues, Cl{\'a}udia Vilega",
affiliation = "{Max-Planck-Institut f{\"u}r Astronomie} and {Universidade de
S{\~a}o Paulo (USP)} and {Instituto Geof{\'{\i}}sico del
Per{\'u}} and {Instituto Nacional de Pesquisas Espaciais
(INPE)}",
title = "A new optical poralization catalog for the small magellanic cloud:
the magnetic field structure",
journal = "Astrophysical Journal",
year = "2015",
volume = "806",
number = "1",
pages = "Article number 94",
month = "June",
keywords = "galaxies: ISM, Magellanic Clouds, magnetic fields, techniques:
polarimetric.",
abstract = "We present a new optical polarimetric catalog for the Small
Magellanic Cloud (SMC). It contains a total of 7207 stars, located
in the northeast (NE) and Wing sections of the SMC and part of the
Magellanic Bridge. This new catalog is a significant improvement
compared to previous polarimetric catalogs for the SMC. We used it
to study the sky-projected interstellar magnetic field structure
of the SMC. Three trends were observed for the ordered magnetic
field direction at position angles (PAs) of (65° ± 10°), (115° ±
10°), and (150° ± 10°). Our results suggest the existence of an
ordered magnetic field aligned with the Magellanic Bridge
direction and SMCs Bar in the NE region, which have PAs roughly at
115. 4 and 45°, respectively. However, the overall magnetic field
structure is fairly complex. The trends at 115° and 150° may be
correlated with the SMCs bimodal structure, observed in Cepheids
distances and HI velocities. We derived a value of Bsky = (0.947
\∼0.079) \μG for the ordered sky-projected magnetic
field, and B = (1.465 \∼0.069) \μG for the turbulent
magnetic field. This estimate of Bskyis significantly larger (by a
factor of \∼10) than the line of sight field derived from
Faraday rotation observations, suggesting that most of the ordered
field component is on the plane of the sky. A turbulent magnetic
field stronger than the ordered field agrees with observed
estimates for other irregular and spiral galaxies. For the SMC the
BskyB ratio is closer to what is observed for our Galaxy than
other irregular dwarf galaxies.",
doi = "10.1088/0004-637X/806/1/94",
url = "http://dx.doi.org/10.1088/0004-637X/806/1/94",
issn = "0004-637X and 1538-4357",
language = "en",
urlaccessdate = "04 maio 2024"
}