Evidence of a pure starburst nature of the nuclear region of NGC 253
arXiv:0902.1044 · doi:10.1051/0004-6361/200911615
Abstract
We present high-resolution spectral line and continuum VLBI and VLA observations of the nuclear region of NGC 253 at 22 GHz. While the water vapor masers in this region were detected on arcsecond and milliarcsecond scales, we could not detect any compact continuum emission with a 5 sigma upper limit of ~ 1 mJy. The observations reveal that the water maser emission is not related to a possible low-luminosity active galactic nucleus but is almost certainly associated with star-formation activity. Not detecting any compact continuum source on milliarcsecond scales also questions the presence of a - previously assumed - active nucleus in NGC 253.
Astronomy and Astrophysics (A&A), accepted, 7 pages, 2 Figures, also available at http://www.mpifr-bonn.mpg.de/staff/abrunthaler/pub.shtml
References in corpus (5)
- The Proper Motion of the Local Group Galaxy IC 10
- A gravitationally lensed water maser in the early Universe
- The nucleus of NGC 253 and its massive stellar clusters at parsec scales
- The Sub-parsec Scale Radio Properties of Southern Starburst Galaxies. I. Supernova Remnants, the Supernova Rate, and the Ionised Medium in the NGC 253 Starburst
- VLA H53alpha and H92alpha line observations of the central region of NGC 253
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