| Title | A deep lambda 20 CM radio continuum survey of M 31 |
| Authors | Beck, R.; Berkhuijsen, E. M.; Hoernes, P. |
| Bibcode | 1998A&AS..129..329B Search ADS ↗ |
| Abstract | We present a survey of the total and linearly polarized radio continuum emission of the Andromeda galaxy at 20 cm wavelength with the VLA-D array. 7 fields were observed with 45'' angular resolution. The missing large-scale total emission observed with the Effelsberg telescope was inserted. This survey is the most sensitive radio continuum survey of M 31 so far and the first one in linear polarization with the VLA. The total emission of M 31 comes from extended regions and point sources. Both components are concentrated in the bright ``ring'' of maximum star formation at about 10 kpc radius. Nearly half of the extended emission emerges from numerous filamentary features which are typically a few arcminutes long ( =~ 600 pc). In the field of M 31, 36 linearly polarized background sources were detected. The smallest degrees of polarization occur on the centre of the ``ring'' where the total emission is highest, hence on the spiral arms as delineated by Hα emission and OB associations. The distribution of polarization angles reveals coherent features of typically 1 kpc in extent, some of which show a relation to an OB association. |
| Objects | 36 Objects Search NED ↙ |
