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Predicting the redshift 2 h-alpha luminosity function using [oiii] emission line galaxies
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Malkan, Matt Mehta, Vihang Dressler, Alan Siana, Brian Teplitz, Harry I. Dai, Y. S. Colbert, James W. Ross, Nathaniel R. Henry, Alaina Rafelski, Marc Scarlata, Claudia Wang, Yun Beck, Melanie Rutkowski, Michael Bagley, Micaela |
| Copyright Year | 2015 |
| Description | Upcoming space-based surveys such as Euclid and WFIRST-AFTA plan to measure Baryonic Acoustic Oscillations (BAOs) in order to study dark energy. These surveys will use IR slitless grism spectroscopy to measure redshifts of a large number of galaxies over a significant redshift range. In this paper, we use the WFC3 Infrared Spectroscopic Parallel Survey (WISP) to estimate the expected number of H-alpha emitters observable by these future surveys. WISP is an ongoing Hubble Space Telescope slitless spectroscopic survey, covering the 0.8 - 1.65 micrometers wavelength range and allowing the detection of H-alpha emitters up to z approximately equal to 1.5 and [OIII] emitters to z approximately equal to 2.3. We derive the H-alpha-[OIII] bivariate line luminosity function for WISP galaxies at z approximately equal to 1 using a maximum likelihood estimator that properly accounts for uncertainties in line luminosity measurement, and demonstrate how it can be used to derive the H-alpha luminosity function from exclusively fitting [OIII] data. Using the z approximately equal to 2 [OIII] line luminosity function, and assuming that the relation between H-alpha and [OIII] luminosity does not change significantly over the redshift range, we predict the H-alpha number counts at z approximately equal to 2 - the upper end of the redshift range of interest for the future surveys. For the redshift range 0.7 less than z less than 2, we expect approximately 3000 galaxies per sq deg for a flux limit of 3 x 10(exp â16) ergs per sec per sq cm (the proposed depth of Euclid galaxy redshift survey) and approximately 20,000 galaxies per sq deg for a flux limit of approximately 10(exp â16) ergs per sec per sq cm (the baseline depth of WFIRST galaxy redshift survey). |
| File Size | 647901 |
| Page Count | 12 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20150020834 |
| Archival Resource Key | ark:/13960/t9479d600 |
| Language | English |
| Publisher Date | 2015-08-28 |
| Access Restriction | Open |
| Subject Keyword | Redshift Predicting Luminosity Ionized Gases Spectroscopy Red Shift Bivariate Analysis Oscillations H Alpha Line Baryons Hubble Space Telescope Sky Surveys Astronomy Dark Energy Oxygen Ions Prediction Analysis Techniques Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
