The QSO HE1013-2136 (z = 0.785): Tracing the ULIRG-QSO connection towards large look-back times?

Details The QSO HE1013-2136 (z = 0.785): Tracing the ULIRG-QSO connection towards large look-back times? The QSO HE1013-2136 (z = 0.785): Tracing the ULIRG-QSO connection towards large look-back times?

Nov 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006newar..50..762h&link_type=abstract

New Astronomy Reviews, Volume 50, Issue 9-10, p. 762-765.

Astronomy and Astrophysics

Astronomy

Scientific paper

Deep BRIH-images as well as long-slit spectra taken with the ESO-2.2m and VLT-telescopes of the QSO HE1013-2136 (z = 0.785) are presented. They show the QSO apparently in the last phase of a ˜1:3 merger. Two tidal tails extending 9″ and 3.5″ (68 and 26 kpc) and several condensations within 3.5″ projected distance are clearly detected. The latter could be companion galaxies to the QSO or debris of a merger remnant. Due to the complexity of the system, the morphology of the host galaxy is not well constrained, however, the host galaxy seems to be as bright as 2 3 L∗. The I- and H-band images of HE1013-2136 show remarkable differences, which are hard to asses. At present it cannot be ruled out that one of the merging galaxies formed a ring-like structure. The spectrum of the QSO shows it to be an extreme Fe II emitter, which is typical for IR-bright QSOs. At least one of the nearby condensations is most likely at the same redshift as the QSO, however, no signs of (post)starburst activity seen in many nearby interacting QSOs are detected. HE1013-2136 shows many similarities to the low-redshift (z = 0.29) intermediate QSO PG 1700+518 and could thus be a unique probe of the ULIRG-QSO connection at large look-back times.

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