Figure 2 from Ca II and Na I Quasar Absorption-line Systems in an Emission-selected Sample of SDSS DR7 Galaxy/Quasar Projections. I. Sample Selection

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Ca II and Na I Quasar Absorption-line Systems in an Emission-selected Sample of SDSS DR7 Galaxy/Quasar Projections. I. Sample Selection

Authors: B. Cherinka and R. E. Schulte-Ladbeck

Cherinka & Schulte-Ladbeck 2011 The Astronomical Journal 142 122.

Provider: AAS Journals

Caption: Figure 2.

Shown here is the distribution of the impact parameter in kpc of the parent galaxy–quasar sample. The large number of pairs seen at large impact parameters is due to the much larger projection of the 100 kpc search radius for low-redshift galaxies, facilitating the detection of many more sightlines.

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