Abstract
The optical spectrum of the QSO HS 1946+7658 (z em = 3.05) has been observed at high resolution (b ~ 15km/s) in the wavelength interval 4115 – 4970Å. The signal-to-noise ratio (≥ 10) in the Lyα forest allows the determination of the neutral hydrogen column density as well the velocity dispersion of the intervening clouds by fitting Voigt profiles. The trend for stronger lines to be broader suggests that their column densities (N HI) and Doppler parameters (b) are related. It is difficult to explain this observed log N HI − b diagram (specially the deficit of strong lines with low b values) as a selection effect.
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© 1995 Springer-Verlag Berlin Heidelberg
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de la Fuente, A. et al. (1995). High-Resolution Spectroscopy of the Bright Quasar HS 1946+7658. In: Meylan, G. (eds) QSO Absorption Lines. ESO Astrophysics Symposia. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-49458-4_67
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DOI: https://doi.org/10.1007/978-3-540-49458-4_67
Publisher Name: Springer, Berlin, Heidelberg
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