NIR Narrow- and Broad-Band Study of the SSA 22 Field

Details NIR Narrow- and Broad-Band Study of the SSA 22 Field NIR Narrow- and Broad-Band Study of the SSA 22 Field

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001pasj...53..653t&link_type=abstract

Publications of the Astronomical Society of Japan, Vol.53, No. 4, pp. 653-662

Astronomy and Astrophysics

Astronomy

2

Cosmology: Observations, Galaxies: Evolution, Galaxies: Formation, Galaxies: Starburst, Infrared: Galaxies

Scientific paper

Deep narrow- and broad-band near-infrared imaging observations of the central 2'×2' region of the SSA 22 field were made with the near-infrared camera (CISCO) attached to the Subaru Telescope. Using a narrow-band filter centered at 2.033μm, [O III] λ5007 emitters at z ~ 3.06 +/- 0.02 were searched to examine star-forming activities in an over-density region where a clustering of Lyman Break Galaxies (LBGs) and Lyman α emitter candidates around z = 3.09 was reported, though the targeted redshift is slightly different from that of the peak of the over-density region. Although one emitter candidate at z = 3.06 was detected, it is likely to be located at a redshift of between 1 and 2 judged based on multi-band photometry. Another emission-line object was detected in another narrow-band filter (``off band'' filter) centered at 2.120 μm, which is identified with a galaxy at z = 0.132 (the emission line is Paschen α). The K'-band imaging data revealed the presence of 12 Extremely Red Objects (EROs) with I814-K' gep 4. The distribution of the EROs does not seem to coincide with that of Lyman Break Galaxies or Lyman alpha; emitters at z ~ 3. The magnitudes and colors of the EROs are not consistent with those of passively evolving massive elliptical galaxies at z ~ 3. Candidates for counterparts of the submm sources detected with SCUBA are found; no EROs around the submm sources are found in our magnitude limit.

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