Volume 389, Number 1, July I 2002
|Page(s)||L39 - L42|
|Published online||14 June 2002|
Letter to the Editor
The association between water kilomasers and compact radio sources in the starburst galaxy NGC 2146
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
2 Istituto di Radioastronomia, CNR, via Gobetti 101, 40129 Bologna, Italy
3 Harvard–Smithsonian Center for Astrophysics, 60 Garden St., Cambridge MA 02138, USA
Corresponding author: A. Tarchi, email@example.com
Accepted: 16 May 2002
We report the detection of 22 GHz water vapor emission toward the starburst galaxy NGC 2146, made using the Effelsberg 100-m telescope. Interferometric observations with the Very Large Array (VLA) show that a part of the emission originates from two prominent sites of star formation that are associated with compact radio continuum sources, likely ultra-compact HII regions. It is concluded that the emission arises from the most luminous and distant H2O “kilomasers” detected so far. Our data increase the number of water maser detections in northern galaxies () with IRAS point source fluxes S100\mu m > 50 Jy to 18%.
Key words: galaxies: individual: NGC 2146 / galaxies: starburst / galaxies: ISM / masers / radio lines: ISM / radio lines: galaxies
© ESO, 2002
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