Deep Lyman alpha imaging of radio galaxy 1138-262 at redshift 2.2

Details Deep Lyman alpha imaging of radio galaxy 1138-262 at redshift 2.2 Deep Lyman alpha imaging of radio galaxy 1138-262 at redshift 2.2

1999-10-14

arxiv.org/abs/astro-ph/9910257v1

Astronomy and Astrophysics

Astrophysics

To appear in proceedings of conference on Clustering At High Redshift, ASP Conf. Series, ed. A. Mazuer and O.Le Fevre (Marseil

Scientific paper

Observations of the powerful radio galaxy 1138-262 at z=2.2 suggest that this galaxy is a massive galaxy in the center of a forming cluster. We have imaged the field of 1138-262 with the Very Large Telescope in a narrow band encompassing the redshifted Lyman alpha emission. We detect 34 probable line emitters in the 6'x6' field. These are candidate Lyman alpha emitting galaxies in the supposed cluster. The observations also reveal that the radio galaxy is enclosed by a very extended Lyman alpha halo (160 kpc).

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