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- W1616593395 abstract "We present results from our analysis of F160W NICMOS Parallel images. These data cover $sim$~9~sq. arcminutes and reach 3$sigma$ depths of H$=$ 24.3 $-$ 25.5 in a $0.6''$ diameter aperture with integration times of 2,000 to 13,000 seconds. We derive the first deep H band galaxy counts. The slope of the counts for H$<$ 20 is 0.31, consistent with various K-band measurements from the Keck telescopes. The measured number counts vs. magnitude relation is reasonably well fitted with no-evolution models with a low $Omega$ value. The half-light radii of the galaxies declines steeply with apparent magnitude and reaches the NIC3 resoltion limit at H$=$23.5. Deep ground-based VRI imaging of one NICMOS field has revealed an extremely red galaxy with R$-$H $=$ 6 and H of 18.8. Our analyses of the grism data show that we can reach 3$sigma$ flux limits of of $1times 10^{-16}$ to $2times10^{-17}$ ergs/sec/cm$^2$ for integration times of 2,000 to 21,000~seconds. We have detected a total of 33 emission line galaxies. The comoving number density is $rm sim 2times 10^{-4} Mpc^{-3}$. The detected emission lines are probably H$_alpha$~6563AA. Thus, the derived star formation rates, without extinction correction, are $10 - 163 Modot$ per year for galaxies at redshifts between 0.7 and 1.9." @default.
- W1616593395 created "2016-06-24" @default.
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- W1616593395 date "1998-09-03" @default.
- W1616593395 modified "2023-09-24" @default.
- W1616593395 title "Studying the Evolution of Field Galaxies Using NICMOS/HST Parallel Imaging and Grism Data" @default.
- W1616593395 doi "https://doi.org/10.48550/arxiv.astro-ph/9809044" @default.
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