SDSS J1553+0056: A BALQSO mimicking a Lyman-break galaxy

Details SDSS J1553+0056: A BALQSO mimicking a Lyman-break galaxy SDSS J1553+0056: A BALQSO mimicking a Lyman-break galaxy

2005-02-10

arxiv.org/abs/astro-ph/0502207v1

Astronomy and Astrophysics

Astrophysics

5 pages, 3 figures, accepted for publication in A&A

Scientific paper

10.1051/0004-6361:20042524

Using the UVES echelle spectrograph at the ESO VLT we obtained high-resolution (R = 40 000) spectra of the object SDSS J1553+0056, which has been identified in the literature alternatively as a high-redshift quasar or as a Lyman-break galaxy (LBG). Although low-resolution spectra of SDSS J1553+0056 closely resemble those of LBGs, our high-resolution spectra allow us to identify this object unambiguously as a LoBAL quasar, probably belonging to the rare FeLoBALQSO class. Based on our spectrum we discuss how misidentifications of such objects from low-resolution spectra can be avoided.

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