The presence and distribution of HI absorbing gas in sub-galactic sized radio sources

@article{Pihlstroem2003ThePA,
  title={The presence and distribution of HI absorbing gas in sub-galactic sized radio sources},
  author={Y. M. Pihlstroem and J. Conway and Ren{\'e} C. Vermeulen},
  journal={Astronomy and Astrophysics},
  year={2003},
  volume={404},
  pages={871-881}
}
We consider the incidence of Hi absorption in intrinsically small sub-galactic sized extragalactic sources selected from sources classified as Gigahertz Peaked Spectrum (GPS) and Compact Steep Spectrum (CSS) sources. We find that the smaller sources ( 0.5 kpc). Both a spherical and an axi- symmetric gas distribution, with a radial power law density profile, can be used to explain this anti-correlation between projected linear size and Hi column density. Since most detections occur in objects… 

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