An Emission-Line Protogalaxy Candidate at z=2.5

Details An Emission-Line Protogalaxy Candidate at z=2.5 An Emission-Line Protogalaxy Candidate at z=2.5

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...448l...5m&link_type=abstract

Astrophysical Journal Letters v.448, p.L5

Astronomy and Astrophysics

Astronomy

27

Galaxies: Evolution, Cosmology: Observations, Infrared: Galaxies

Scientific paper

Narrow-band infrared imaging has revealed a faint red galaxy with a strong (equivalent width = 2%) emission line at 2.30 mu m. The field was observed because of its proximity to the quasar SBS 0953+549, which has a metal-line absorption system at zabs = 2.50. The emission-line galaxy is only separated from the quasar line of sight by a projected distance of 240 kpc, and we identify the emission line as H alpha /[N II] in a galaxy which is in the same group as the z = 2.50 absorber. Since all the galaxy properties are also consistent with a young age and a redshift of 2.5, it is a prime candidate for a protogalaxy.

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