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

I. Appenzeller·O. Stahl·C. Tapken·D. Mehlert·S. Noll
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Abstract

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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I. Appenzeller, O. Stahl, C. Tapken, D. Mehlert, S. Noll. 2005-02-10. SDSS J1553+0056: A BALQSO mimicking a Lyman-break galaxy. https://doi.org/10.1051/0004-6361%3A20042524

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