A possible gravitational lens in the Hubble Deep Field South

Rennan Barkana, Roger Blandford, David W. Hogg

    Research output: Contribution to journalArticlepeer-review

    Abstract

    We model an apparent gravitational lens system HDFS 2232509-603243 in the Hubble Deep Field South. The system consists of a blue V = 25 mag arc separated by 0″.9 from a red V = 22 mag elliptical galaxy. A mass distribution that follows the observed light distribution with a constant mass-to-light ratio can fit the arc component positions if external shear is added. A good fit is also obtained with simple parameterized models, and all the models predict a fourth image that is fainter than the detection limit. The inferred mass-to-light ratio is ∼15 in solar units if the lens is at z = 0.6. The lens models predict a velocity dispersion of ∼280 km s-1 that could be confirmed with spectroscopy.

    Original languageEnglish (US)
    Pages (from-to)L91-L94
    JournalAstrophysical Journal
    Volume513
    Issue number2 PART 2
    DOIs
    StatePublished - Mar 10 1999

    Keywords

    • Cosmology: observations
    • Galaxies: individual (HDFS 2232509-603243)
    • Gravitational lensing

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

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