An extragalactic HII region in the Virgo cluster

Details An extragalactic HII region in the Virgo cluster An extragalactic HII region in the Virgo cluster

2003-12-02

arxiv.org/abs/astro-ph/0312061v1

Astron.Astrophys. 416 (2004) 119-123

Astronomy and Astrophysics

Astrophysics

7 pages, 2 figures, 4 tables. Accepted for publication on A&A. High resolution figures and FITS images available at http://g

Scientific paper

10.1051/0004-6361:20031755

We present spectroscopic observations for six emission-line objects projected onto the Virgo cluster. These sources have been selected from narrow band (H\alpha+[NII]) images showing faint detectable continuum emission and EW>100 Angstrom. Five of these sources result [OIII]\lambda 5007 emitters at z ~ 0.31, while one 122603+130724 is confirmed to be an HII region belonging to the Virgo cluster. This point-like source has a recessional velocity of ~ 200 km/s, and is associated with the giant galaxy VCC873 (NGC 4402). It has a higher luminosity, star formation rate and metallicity than the extragalactic HII region recently discovered near the Virgo galaxy VCC836 by Gerhard et al. (2002).

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