The megamaser galaxy Markarian 273. I - VLA observations of the hydroxyl emission

Details The megamaser galaxy Markarian 273. I - VLA observations of the hydroxyl emission The megamaser galaxy Markarian 273. I - VLA observations of the hydroxyl emission

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...321..225s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 321, Oct. 1, 1987, p. 225-232.

Astronomy and Astrophysics

Astrophysics

31

Astronomical Spectroscopy, Hydroxyl Emission, Interstellar Masers, Markarian Galaxies, Very Large Array (Vla), Astronomical Maps, Centimeter Waves, High Resolution, Interstellar Matter, Line Spectra, Molecular Clouds

Scientific paper

The hydroxyl megamaser emission in Mrk 273 was observed with the VLA in its high-resolution A array. The radio continuum source is extended at 18 cm; observations published by Ulvestad and Wilson (1984) reveal a double at 6 cm where the stronger component is resolved into a triple at 2 cm. The OH emission is certainly associated only with the stronger component of the 6-cm double and possibly only with the stongest component of the 2-cm triple. Unfortunately, the three velocity-resolved components of the OH line are not spatially resolved, and no information on the molecular disk rotation properties of this galaxy can be determined. This is very different from the VLA results of the megamaser prototype in IC 4553, where the emission is associated with all the continuum components and actually mimics the spatial structure of the radio continuum. Relevant properties of the known megamasers are listed and compared.

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