A Y-band look of the sky with 1-m class telescopes

Details A Y-band look of the sky with 1-m class telescopes A Y-band look of the sky with 1-m class telescopes

2012-02-23

arxiv.org/abs/1202.5079v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

12 pages, 6 figures, accepted for publication in JKAS

Scientific paper

Y -band is a broad passband that is centered at ~ 1 micron. It is becoming a new, popular window for extragalactic study especially for observation of red objects thanks to recent CCD technology developments. In order to better understand the general characteristics of objects in Y -band, and to investigate the promise of Y -band observations with small telescopes, we carried out imaging observation of several extragalactic fields, brown dwarfs and high redshift quasars with Y -band filter at the Mt. Lemmon Optical Astronomy Observatory and the Maidanak observatory. From our observations, we constrain the bright end of the galaxy and the stellar number counts in Y -band. Also, we test the usefulness of high redshift quasar (z > 6) selection via i-z-Y color-color diagram, to demonstrate that the i-z-Y color-color diagram is effective for the selection of high redshift quasars even with a conventional optical CCD camera installed at a 1-m class telescope.

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