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2002A&A...386..865T - Astronomy and Astrophysics, volume 386, 865-868 (2002/5-2)

Dusty haloes of galaxies at intermediate redshifts.

TEERIKORPI P.

Abstract (from CDS):

The presence and amount of dust in the halo matter producing narrow metal line absorption systems is still uncertain. We consider the parameter Σa=∑(1+za), summed over the detected aborption line system redshifts za, and ask whether radio-loud quasars at z<2 and with a large value of the parameter Σa are redder in the B-V colour than those with a smaller Σa. This is anticipated if the absorption lines originate in sites which contain normal'' dust causing selective extinction. The answer is positive, and a mean intrinsic reddening e0 per halo is consistent with ≃0.05, or about 0.2 B-mag extinction, roughly as expected.

Journal keyword(s): quasars: absorption lines - galaxies: haloes - ISM: dust

Full paper

2022.10.01-12:43:51