Abstract

KIMESWENGER, S.; BARRIA, D.; KAUSCH, W.  and  GOLDMAN, D. S.. Emission line galaxies behind the planetary nebula IC 5148: Potential for a serendipity survey with archival data. Rev. mex. astron. astrofis [online]. 2018, vol.54, n.1. ISSN 0185-1101.

During the start of a survey program using FORS2 long slit spectroscopy on planetary nebulae (PN) and their haloes, we serendipitously discovered six background emission line galaxies (ELG) with redshifts of z = 0.2057, 0.3137, 0.37281, 0.4939, 0.7424 and 0.8668. Thus they clearly do not belong to a common cluster structure. We derived the major physical properties of the targets. Since the used long slit covers a sky area of only 570 arcsec2(= 4.3 × 10-5 square degrees), we discuss further potential of serendipitous discoveries in archival data, beside the deep systematic work of the ongoing and upcoming big surveys. We conclude that archival data provide a decent potential for extending the overall data on ELGs without any selection bias.

Keywords : galaxies: active; galaxies: distances and redshifts; methods: observational; surveys; techniques: spectroscopic.

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