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| Paper: |
Large BALQSO Fractions Inferred from NIR and Radio Surveys:
Implication to AGN and Feedback Models |
| Volume: |
460, AGN Winds in Charleston |
| Page: |
120 |
| Authors: |
Dai, X.; Morabito, L. K.; Shankar, F.; Sivakoff, G. R.; Leighly, K. M. |
| Abstract: |
Combining the SDSS, 2MASS, and FIRST surveys, we find large BALQSO
fractions in NIR- and radio-detected samples: 20–40% for
Hi-BALQSOs, 3–7% for Lo-BALQSOs, and 1.5–2% for FeLoBALs. These
fractions are two, 3–5, and 10 times higher than the corresponding
fractions observed in the optical bands. Considering the
intrinsic obscuration for BALQSOs, we can successfully explain the
high BALQSO fractions measured in the NIR and radio detected
sample. We also argue that these fractions are closer to the
intrinsic fractions for BALQSOs of different species. We find the
fractions of BALQSOs drop with increasing radio luminosity, and
this can be easily explained using a geometric model. Our Suzaku
observations of three FeLoBALs constrain their absorption column
densities to be Compton thick. The larger LoBAL/FeLoBAL fractions
and column densities inferred from our studies suggest that
LoBALs/FeLoBALs can provide similar feedback energy as the more
populated HiBALs. |
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