Extreme Emission Line Outflows in the GPS Source 4C12.50 (PKS1345+12)
Abstract
We present high resolution spectra (0.7Å/pix) of the GPS source 4C12.50 with large spectral coverage (~4500Å) taken with the 4.2m William Herschel Telescope, La Palma. The slit was aligned along PA 160° to include the nucleus and emission line region to the NW. An asymmetric halo extending 20kpc NW and 12kpc SE from the nucleus is clearly seen. At the position of the nucleus we observe unusually broad forbidden emission line components (broadest component: FWHM~2000kms-1), blue shifted by up to 2000kms-1 with respect to the halo of the galaxy and HI absorption. We interpret this as material in outflow. We measure E(B-V)=1.44 for the broadest, most kinematically disturbed component, corresponding to an actual Hβ flux 130 times brighter than that measured. We calculate an upper limit for the mass of the line emitting gas of order 106Msolar for both the intermediate and broad components. Our results are consistent with 4C12.50 being a young radio source.
- Publication:
-
Publications of the Astronomical Society of Australia
- Pub Date:
- 2003
- DOI:
- 10.1071/AS02038
- arXiv:
- arXiv:astro-ph/0210092
- Bibcode:
- 2003PASA...20...25H
- Keywords:
-
- ISM: jets and outflows;
- ISM: kinematics and dynamics;
- galaxies: active;
- galaxies: ISM;
- galaxies: kinematics and dynamics;
- galaxies: individual (4C 12.50;
- PKS 1345+12);
- Astrophysics
- E-Print:
- 5 pages, 4 postscript figures, preparaed in LaTeX. Will appear in Publications of the Astronomical Society of Australia, as part of the proceedings of the 3rd GPS/CSS workshop, ed. T. Tzioumis, W. de Vries, I. Snellen, A. Koekemoer