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A Survey for Hα emitting galaxies AT z ≃ 2.2

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Abstract

The deepest survey for Hα emitting galaxies at z ≃ 2.2has recently been made in narrow-band (≃ 1%) filters around2.1μm using SOFI at the ESO NTT telescope. An effective area of≃ 100 sq. arcmin and a comoving volume of 9000 Mpc3 (forH0 = 50, q0 = 0.5) has been covered to a volume weighted 3σ line flux limit of ≃ 5 × 10-17 erg s-1cm-2. Our survey covered the WFPC2 and STIS fields in the HubbleDeep Field South and an anonymous field about 30 deg. away. Thefaintest limit reached was 3 × 10-17 erg s-1 cm-2 onthe WFPC2 field. In total, 10 convincing candidates with deduced starformation rates in the range 9 - 50 M⊙/yr and an equal number ofmarginal ones have been identified for confirmation and follow-upspectroscopy with ISAAC at the VLT. Based on a very preliminaryanalysis we compare our results with those of earlier surveys andbriefly discuss some possible implications for the form of theevolution out to z ≃ 2 and the effects of clustering.

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Authors and Affiliations

  1. European Southern Observatory, Karl Schwarzschild Str. 2, D-85478, Garching, Germany

    A.F.M. Moorwood

  2. Leiden Observatory, P.O.Box 9513, NL-2300 RA, Leiden, The Netherlands

    P.P. Van der Werf

  3. European Southern Observatory, Karl Schwarzschild Str. 2, D-85478, Garching, Germany

    J. G. Cuby

  4. Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125, Firenze, Italy

    E. Oliva

Authors
  1. A.F.M. Moorwood
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  2. P.P. Van der Werf
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  3. J. G. Cuby
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  4. E. Oliva
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Moorwood, A., Van der Werf, P., Cuby, J.G. et al. A Survey for Hα emitting galaxies AT z ≃ 2.2. Astrophysics and Space Science 266, 255–260 (1999). https://doi.org/10.1023/A:1002607311272

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