%0 Generic %1 colbert2013predicting %A Colbert, James W. %A Teplitz, Harry %A Atek, Hakim %A Bunker, Andrew %A Rafelski, Marc %A Ross, Nathaniel %A Scarlata, Claudia %A Bedregal, Alejandro %A Dominguez, Alberto %A Dressler, Alan %A Henry, Alaina %A Malkan, Matt %A Martin, Crystal L. %A Masters, Dan %A McCarthy, Patrick %A Siana, Brian %D 2013 %K Ha grism nir oxygen %T Predicting Future Space Near-IR Grism Surveys using the WFC3 Infrared Spectroscopic Parallels Survey %U http://arxiv.org/abs/1305.1399 %X We present near-infrared emission line counts and luminosity functions from the HST WFC3 Infrared Spectroscopic Parallels (WISP) program for 29 fields observed using both the G102 and G141 grism. Altogether we identify 1048 emission line galaxies with observed equivalent widths greater than 40 Angstroms, 467 of which have multiple detected emission lines. The WISP survey is sensitive to fainter flux levels (3-5x10^-17 ergs/s/cm^2) than the future space near-infrared grism missions aimed at baryonic acoustic oscillation cosmology (1-4x10^-16 ergs/s/cm^2), allowing us to probe the fainter emission line galaxies that the shallower future surveys may miss. Cumulative number counts of 0.7<z<1.5 galaxies are in rough agreement with the corrected count predictions of H-alpha emitters from Geach et al. (2010), reaching 10,000 deg^-2 above an H-alpha flux of 2x10^-16 ergs/s/cm^2. H-alpha-emitting galaxies with comparable OIII flux are roughly 5 times less common than galaxies with just H-alpha emission at those flux levels. Galaxies with low H-alpha/OIII ratios are very rare at the brighter fluxes that future near-infrared grism surveys will probe; our survey finds no galaxies with H-alpha/OIII<0.95 that have H-alpha flux greater than 3x10^-16 ergs/s/cm^2. We also find that our high redshift (z=0.9-1.5) counts are slightly higher (factors of 1.3-2) than the high redshift (z=1.47) narrow band H-alpha survey of HiZELS (Sobral et al. 2012), although our lower redshift luminosity function (z=0.3-0.9) is consistent with their z=0.84 result. The evolution in the OIII luminosity function from z=0.7-2.3 is almost entirely in the L* parameter, which steadily increases with redshift over that range.

@misc{colbert2013predicting, abstract = {We present near-infrared emission line counts and luminosity functions from the HST WFC3 Infrared Spectroscopic Parallels (WISP) program for 29 fields observed using both the G102 and G141 grism. Altogether we identify 1048 emission line galaxies with observed equivalent widths greater than 40 Angstroms, 467 of which have multiple detected emission lines. The WISP survey is sensitive to fainter flux levels (3-5x10^{-17} ergs/s/cm^2) than the future space near-infrared grism missions aimed at baryonic acoustic oscillation cosmology (1-4x10^{-16} ergs/s/cm^2), allowing us to probe the fainter emission line galaxies that the shallower future surveys may miss. Cumulative number counts of 0.7<z<1.5 galaxies are in rough agreement with the corrected count predictions of H-alpha emitters from Geach et al. (2010), reaching 10,000 deg^{-2} above an H-alpha flux of 2x10^{-16} ergs/s/cm^2. H-alpha-emitting galaxies with comparable [OIII] flux are roughly 5 times less common than galaxies with just H-alpha emission at those flux levels. Galaxies with low H-alpha/[OIII] ratios are very rare at the brighter fluxes that future near-infrared grism surveys will probe; our survey finds no galaxies with H-alpha/[OIII]<0.95 that have H-alpha flux greater than 3x10^{-16} ergs/s/cm^2. We also find that our high redshift (z=0.9-1.5) counts are slightly higher (factors of 1.3-2) than the high redshift (z=1.47) narrow band H-alpha survey of HiZELS (Sobral et al. 2012), although our lower redshift luminosity function (z=0.3-0.9) is consistent with their z=0.84 result. The evolution in the [OIII] luminosity function from z=0.7-2.3 is almost entirely in the L* parameter, which steadily increases with redshift over that range.}, added-at = {2013-05-08T17:02:05.000+0200}, author = {Colbert, James W. and Teplitz, Harry and Atek, Hakim and Bunker, Andrew and Rafelski, Marc and Ross, Nathaniel and Scarlata, Claudia and Bedregal, Alejandro and Dominguez, Alberto and Dressler, Alan and Henry, Alaina and Malkan, Matt and Martin, Crystal L. and Masters, Dan and McCarthy, Patrick and Siana, Brian}, biburl = {https://www.bibsonomy.org/bibtex/2ffbf19e3b1380f39246bb79dfe5cbc27/miki}, description = {[1305.1399] Predicting Future Space Near-IR Grism Surveys using the WFC3 Infrared Spectroscopic Parallels Survey}, interhash = {d651bf97b5f20b2ac799f9ab548f6d27}, intrahash = {ffbf19e3b1380f39246bb79dfe5cbc27}, keywords = {Ha grism nir oxygen}, note = {cite arxiv:1305.1399Comment: 15 pages, 13 figures, submitted to ApJ}, timestamp = {2013-05-08T17:02:06.000+0200}, title = {Predicting Future Space Near-IR Grism Surveys using the WFC3 Infrared Spectroscopic Parallels Survey}, url = {http://arxiv.org/abs/1305.1399}, year = 2013 }