A size upper limit and position for the HCN maser in CIT 6

Details A size upper limit and position for the HCN maser in CIT 6 A size upper limit and position for the HCN maser in CIT 6

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj....100..213c&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 100, July 1990, p. 213-215.

Astronomy and Astrophysics

Astronomy

8

Astrometry, Hydrocyanic Acid, Interstellar Masers, Line Spectra, Astronomical Coordinates, Interferometry, Position (Location)

Scientific paper

A size upper limit and position for the HCN maser in CIT 6 were determined from interferometric observations with the Hat Creek millimeter array. The maser is located at alpha(1950) = 10 h 13 m 10.942 + or - 0.012 s and delta(1950) = + 30 deg 49 arcmin 16.75 arcsec + or - 0.15, coincident with the optical image taken from the Palomar plates, within the 3 arcsec uncertainty of the latter. The size of the maser emission region is less than 0.45 arcsec, approximately 180 AU at the distance estimated for CIT 6. The small size and strong emission (40 Jy) set a lower limit to the brightness temperature of 44,000 K, further strengthening the maser interpretation.

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