
%0 Journal Article
%A Holt, J. 
%A Tadhunter, C. N. 
%A Morganti, R. 
%T Extreme Emission Line Outflows in the GPS Source 4C 12.50 (PKS 1345&#43;12)
%J Publications of the Astronomical Society of Australia
%D 2003/06/04
%V 20
%N 1
%P 25-27
%K Keywords: ISM: jets and outflows &#8212; ISM: kinematics and dynamics &#8212; galaxies: active &#8212; galaxies: ISM &#8212; galaxies: kinematics and dynamics &#8212; galaxies: individual (4C&#32;12.50, PKS&#32;1345&#43;12)
%R https://doi.org/10.1071/AS02038
%U https://www.publish.csiro.au/paper/AS02038 
%X We present high resolution spectra (0.7&#32;&#197;/pix) of the GPS source 4C&#32;12.50 with large spectral coverage (&#126;4500&#32;&#197;) taken with the 4.2&#32;m William Herschel Telescope, La Palma. The slit was aligned along PA 160&#176; to include the nucleus and emission line region to the NW. An asymmetric halo extending 20&#32;kpc NW and 12&#32;kpc SE from the nucleus is clearly seen. At the position of the nucleus we observe unusually broad forbidden emission line components (broadest component: FWHM&#32;&#126;&#32;2000&#32;km&#32;s&#8211;1), blue shifted by up to 2000&#32;km&#32;s&#8211;1 with respect to the halo of the galaxy and HI absorption. We interpret this as material in outflow. We measure E(B&#8211;V)&#32;=&#32;1.44 for the broadest, most kinematically disturbed component, corresponding to an actual H&#946; flux 130 times brighter than that measured. We calculate an upper limit for the mass of the line emitting gas of order 106&#32;M&odot; for both the intermediate and broad components. Our results are consistent with 4C&#32;12.50 being a young radio source. 
