Towards completing a large-area ultraluminous infrared galaxy survey

Details Towards completing a large-area ultraluminous infrared galaxy survey Towards completing a large-area ultraluminous infrared galaxy survey

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999mnras.302..391c&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 302, Issue 2, pp. 391-398.

Astronomy and Astrophysics

Astronomy

7

Galaxies: Individual: 00029, 1424, Galaxies: Individual: 03156, 1706, Galaxies: Interactions, Galaxies: Starburst, Infrared: Galaxies

Scientific paper

We present the latest results in our efforts to produce a complete, large sample of ultraluminous infrared galaxies (ULIRGs, L_60>10^11.4 L_osolar for H_0=100 km s^-1 Mpc^-1, q_0=0.5) for use in the study of these objects and their evolution. We have been using an optical/IR colour technique to select those objects most likely to be ULIRGs. 65 of the 198 candidate ULIRGs that do not yet have redshifts were observed. Redshifts were obtained for 51 of these objects, including eight new ULIRGs and a further three probable ULIRGs with tentative redshifts. The new ULIRGs include one object at z=044 (0002 9-1 424), the highest in the survey so far, and at least one new broad-line ULIRG (0315 6-1 706) which appears to lie in a galaxy cluster. We discuss the properties of these objects and their local environments, concluding that three of them have high-excitation spectra, and that five show disturbed morphology even in the shallow acquisition images. We also present the redshift measurements of the non-ULIRGs identified in the course of this survey.

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