The radio properties of the broad-absorption-line QSOs

Stocke, John T.; Morris, Simon L.; Weymann, Ray J.; Foltz, Craig B.

doi:10.1086/171735

The radio properties of the broad-absorption-line QSOs

John T. Stocke
(
- Colorado U. and
- Carnegie Inst. Observ. and
- MMTO, Tucson
)
,
Simon L. Morris
(
- Colorado U. and
- Carnegie Inst. Observ. and
- MMTO, Tucson
)
,
Ray J. Weymann
(
- Colorado U. and
- Carnegie Inst. Observ. and
- MMTO, Tucson
)
,
Craig B. Foltz
(
- Colorado U. and
- Carnegie Inst. Observ. and
- MMTO, Tucson
)

Sep, 1992

17 pages

Published in:

Astrophys.J. 396 (1992) 487-503

DOI:

10.1086/171735

View in:

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Abstract: (ADS)

Results of a VLA radio detection survey conducted for a large sample of broad-absorption-line (BAL) QSOs are presented. The absence of luminous radio sources among the 68 known BALQSOs under consideration, together with a complementary spectroscopic study which finds no BALQSOs among a large sample of radio-loud quasars, establishes a strong anticorrelation between luminous radio source and the BALQSO phenomenon. On the basis of a quantitative statistical test calibrated by Monte Carlo realizations, the long-suggested bimodal division of all QSOs into radio-loud and radio-quiet objects is found to be present at greater than 98 percent confidence level in several samples. It is suggested that QSOs produce either a highly collimated, powerful, relativistic jet that gives rise to luminous emission or to a subrelativistic, uncollimated wind that accelerates the BAL clouds, but not both.

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