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V4332 Sgr in `Quiescence'

Kimeswenger, S.

In 1994 V4332 Sgr underwent a mysterious eruption. Somehow its fast evolution towards a red giant star was, lacking alternative classifications, connected to the red variable M31 RV, which had its eruption in 1988. The red eruptive variable V838 Mon draw the attention back to its 'older twin' V4332 Sgr in February 2002. The new precise photometry …

High redshift Lyα halos

De Breuck, C.; van Breugel, W.; Croft, S. +5 more

We review current evidence for the existence of large emission-line halos around high redshift radio galaxies. Detailed narrow-band imaging and spectroscopic studies of these systems may help us understand the early stages of massive forming galaxies and AGN feedback.

HST/ACS observations of Lyman-break galaxies and Lyα emitters associated with radio galaxies at z>4

Overzier, R. A.

Distant radio galaxies may pinpoint overdense regions in the early universe. We have collected data with HST/ACS towards several overdensities of Lyα emitters associated with radio galaxies discovered by Venemans et al. Using the Lyman break selection technique we find statistical evidence for additional galaxies associated with the radio galaxies…