IMAGING POLARIMETRY OF THE STARBURST GALAXY NGC-1808 - ANOTHER M82

Citation
Sm. Scarrott et al., IMAGING POLARIMETRY OF THE STARBURST GALAXY NGC-1808 - ANOTHER M82, Monthly Notices of the Royal Astronomical Society, 264(2), 1993, pp. 7-12
Citations number
24
Categorie Soggetti
Astronomy & Astrophysics
ISSN journal
00358711
Volume
264
Issue
2
Year of publication
1993
Pages
7 - 12
Database
ISI
SICI code
0035-8711(1993)264:2<7:IPOTSG>2.0.ZU;2-Z
Abstract
An optical polarization map for the starburst galaxy NGC 1808 is prese nted. On kiloparsec scales the polarization orientations follow the sp iral arms, indicative of a magnetic field that is coherent on a galact ic scale. The inner parts (< 750 pc) of the galaxy show a polarization pattern that is typical of a huge reflection nebula illuminated from within the central activity. Although the galactic nucleus is the domi nant illuminating source of this 'nebula', the other hotspots make var ying contributions to the illumination. The inner reflection nebula is very reminiscent of the one in the archetypal starburst galaxy M82.