Surveys for Z>1 Field Galaxies; David Crampton
msra(1994)
摘要
In the course of the comprehensive CFRS redshift survey to I = 22.5 with the
CFHT MOS/SIS spectrograph, we have observed ~25 field galaxies with z > 1.
However, it is clear that almost an equal number, predominantly red galaxies,
have likely been missed largely because of limitations in the observed
wavelength range. The properties of the observed galaxies and the reasons for
the presumed incompleteness are briefly discussed in this contribution, and
strategies for improving our methods of observing high redshift galaxies are
explored. In particular, it is demonstrated that sky subtraction to the
required limiting magnitude is possible even with very low spectral resolution,
and that new IR arrays and new optical designs for multi-object spectrographs
will allow us to easily reach field galaxies at z > 1.
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关键词
spectral resolution,astrophysics
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