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Exploring the chemical link between local ellipticals and their high-redshift progenitors
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Kriek, Mariska Franx, Marijn Schreiber, Natascha Foerster Whitaker, Katherine E. Van Dokkum, Pieter G. Conroy, Charlie Brammer, Gabriel Van Der Wel, Arjen Momcheva, Ivelina Leja, Joel Patel, Shannon G. Andrews, Brett H. Nelson, Erica Skelton, Rosalind E. Bezanson, Rachel |
| Copyright Year | 2013 |
| Description | We present Keck/MOSFIRE K-band spectroscopy of the first mass-selected sample of galaxies at z approximately 2.3. Targets are selected from the 3D-Hubble Space Telescope Treasury survey. The six detected galaxies have a mean [N II]lambda6584/H-alpha ratio of 0.27 +/- 0.01, with a small standard deviation of 0.05. This mean value is similar to that of UV-selected galaxies of the same mass. The mean gas-phase oxygen abundance inferred from the [N II]/Halpha ratios depends on the calibration method, and ranges from 12+log(O/H)(sub gas) = 8.57 for the Pettini & Pagel calibration to 12+log(O/H)(sub gas) = 8.87 for the Maiolino et al. calibration. Measurements of the stellar oxygen abundance in nearby quiescent galaxies with the same number density indicate 12+log(O/H)(sub stars) = 8.95, similar to the gas-phase abundances of the z approximately 2.3 galaxies if the Maiolino et al. calibration is used. This suggests that these high-redshift star forming galaxies may be progenitors of today's massive early-type galaxies. The main uncertainties are the absolute calibration of the gas-phase oxygen abundance and the incompleteness of the z approximately 2.3 sample: the galaxies with detected Hα tend to be larger and have higher star formation rates than the galaxies without detected H-alpha, and we may still be missing the most dust-obscured progenitors. |
| File Size | 1266508 |
| Page Count | 7 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20140008681 |
| Archival Resource Key | ark:/13960/t5fc02h30 |
| Language | English |
| Publisher Date | 2013-12-01 |
| Access Restriction | Open |
| Subject Keyword | Chemical Exploring Link Ionized Gases Red Shift Astrophysics Supernovae H Alpha Line Mass To Light Ratios Nitrogen Ions Extremely High Frequencies Gas Ionization Spectroscopy Oxygen Elliptical Galaxies Galactic Evolution Vapor Phases Abundance Data Reduction Stellar Models Star Formation Rate Stellar Mass Accretion Wavelengths Stellar Mass Photoionization Metallicity Hubble Space Telescope Sky Surveys Astronomy Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
