The H α and O III λ5007 Luminosity Functions of 1 2<z<1 9 Emission-Line Galaxies from HST Grism Spectroscopy by Gautam Nagaraj et al.  on Wednesday 30 November
Euclid and the Roman Space Telescope (Roman) will soon use grism spectroscopy
to detect millions of galaxies via H$\alpha$ and [O III] $\lambda 5007$
emission. To better constrain the expected galaxy counts from these
instruments, we use a vetted sample of 4,239 emission-line galaxies from the
3D-HST survey to measure the H$\alpha$ and [O III] $\lambda 5007$ luminosity
functions between $1.16<z<1.90$; this sample is $\sim 4$ times larger than
previous studies at this redshift. We find very good agreement with previous
measurements for H$\alpha$, but for [O III], we predict a higher number of
intermediate-luminosity galaxies than previous works. We find that for both
lines, the characteristic luminosity, $\mathcal{L}_*$, increases monotonically
with redshift, and use the H$\alpha$ luminosity function to calculate the
epoch's cosmic star formation rate density. We find that H$\alpha$-visible
galaxies account for $\sim 81\%$ of the epoch's total star formation rate, and
this value changes very little over the $1.16<z<1.56$ redshift range. Finally,
we derive the surface density of galaxies as a function of limiting flux and
find that previous predictions for galaxy counts for the Euclid Wide Survey are
unchanged, but there may be more [O III] galaxies in the Roman High Latitude
Survey than previously estimated.
arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.16650v1

The H α and O III λ5007 Luminosity Functions of 1 2<z<1 9 Emission-Line Galaxies from HST Grism Spectroscopy by Gautam Nagaraj et al. on Wednesday 30 November Euclid and the Roman Space Telescope (Roman) will soon use grism spectroscopy to detect millions of galaxies via H$\alpha$ and [O III] $\lambda 5007$ emission. To better constrain the expected galaxy counts from these instruments, we use a vetted sample of 4,239 emission-line galaxies from the 3D-HST survey to measure the H$\alpha$ and [O III] $\lambda 5007$ luminosity functions between $1.16<z<1.90$; this sample is $\sim 4$ times larger than previous studies at this redshift. We find very good agreement with previous measurements for H$\alpha$, but for [O III], we predict a higher number of intermediate-luminosity galaxies than previous works. We find that for both lines, the characteristic luminosity, $\mathcal{L}_*$, increases monotonically with redshift, and use the H$\alpha$ luminosity function to calculate the epoch's cosmic star formation rate density. We find that H$\alpha$-visible galaxies account for $\sim 81\%$ of the epoch's total star formation rate, and this value changes very little over the $1.16<z<1.56$ redshift range. Finally, we derive the surface density of galaxies as a function of limiting flux and find that previous predictions for galaxy counts for the Euclid Wide Survey are unchanged, but there may be more [O III] galaxies in the Roman High Latitude Survey than previously estimated. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.16650v1

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The H α and O III λ5007 Luminosity Functions of 1 2<z<1 9 Emission-Line Galaxies from HST Grism Spectroscopy

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The H α and O III λ5007 Luminosity Functions of 1 2<z<1 9 Emission-Line Galaxies from HST Grism Spectroscopy

The H α and O III λ5007 Luminosity Functions of 1 2<z<1 9 Emission-Line Galaxies from HST Grism Spectroscopy