1987The Astronomical JournalRequires access

Broad-absorption-line quasar candidates discovered in the CFHT/MMT QSO survey

A. P. Cowley, D. Crampton

Open publisher page 0 citations

Abstract

In the course of a large slitless spectral survey for QSOs, fifteen broad-absorption-line quasar candidates (BAL QSOs) have been discovered. The survey covers a region of about 4 sq deg, and is complete to a limiting magnitude of m(B) = 20.5, and is relatively free of effects that might bias the discovery of BAL QSOs in the redshift range of about 0.1-3.2. About 9 percent of all the quasars in this sample exhibit the BAL phenomena. The frequency of BAL QSOs with z greater than 2 appears to be higher than for lower-redshift objects. However, the absolute-magnitude distribution of the BAL QSOs appears to be the same as that of the whole quasar sample. Details about these quasars are presented, as well as spectra of two non-BAL quasars with z greater than 3.2.

About this research paper

What this paper is about

In the course of a large slitless spectral survey for QSOs, fifteen broad-absorption-line quasar candidates (BAL QSOs) have been discovered. The survey covers a region of about 4 sq deg, and is complete to a limiting magnitude of m(B) = 20.5, and is relatively free of effects that might bias the discovery of BAL QSOs in the redshift range of about 0.1-3.2. About 9 percent of all the quasars in this sample exhibit the BAL phenomena. The frequency of BAL QSOs with z greater than 2 appears to be higher than for lower-redshift objects. However, the absolute-magnitude distribution of the BAL QSOs appears to be the same as that of the whole quasar sample. Details about these quasars are presented, as well as spectra of two non-BAL quasars with z greater than 3.2.

Why it matters

A significance statement is not available in the OpenAlex record.

Key contribution

A contribution statement is not available in the OpenAlex record.

Method / approach

Method details are not available in the OpenAlex metadata.

Main findings

Findings are not separately available in the OpenAlex metadata.

Limitations

Limitations are not available in the OpenAlex metadata.

Applications

Application details are not available in the OpenAlex metadata.

Available abstract

In the course of a large slitless spectral survey for QSOs, fifteen broad-absorption-line quasar candidates (BAL QSOs) have been discovered. The survey covers a region of about 4 sq deg, and is complete to a limiting magnitude of m(B) = 20.5, and is relatively free of effects that might bias the discovery of BAL QSOs in the redshift range of about 0.1-3.2. About 9 percent of all the quasars in this sample exhibit the BAL phenomena. The frequency of BAL QSOs with z greater than 2 appears to be higher than for lower-redshift objects. However, the absolute-magnitude distribution of the BAL QSOs appears to be the same as that of the whole quasar sample. Details about these quasars are presented, as well as spectra of two non-BAL quasars with z greater than 3.2.

Key concepts: Physics, Quasar, Astrophysics, Astronomy, Absorption spectroscopy, Absorption (acoustics), Red shift, Galaxy

Related papers

Back to paper searchBrowse research topicsOriginal source
Broad-absorption-line quasar candidates discovered in the CFHT/MMT QSO survey — Research Paper | ScholarLens