The emission line properties of gravitationally lensed 1.5 < z < 5 galaxies
We present and analyse near-infrared spectroscopy for a sample of 28 gravitationally lensed star-forming galaxies in the redshift range 1.5 < z < 5, observed mostly with the Keck II telescope. With typical magnifications of ≃1.5-4 mag, our survey provides a valuable census of star formation ra...
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| Veröffentlicht in: | Monthly notices of the Royal Astronomical Society 2011-05, Vol.413 (1), p.643-658 |
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| creator | Richard, Johan Jones, Tucker Ellis, Richard Stark, Daniel P. Livermore, Rachael Swinbank, Mark |
| description | We present and analyse near-infrared spectroscopy for a sample of 28 gravitationally lensed star-forming galaxies in the redshift range 1.5 < z < 5, observed mostly with the Keck II telescope. With typical magnifications of ≃1.5-4 mag, our survey provides a valuable census of star formation rates, gas-phase metallicities and dynamical masses for a representative sample of low-luminosity galaxies seen at a formative period in cosmic history. We find less evolution in the mass-metallicity relation compared to earlier work that focused on more luminous systems with z∼ 2-3, especially in the low mass (∼109 M⊙) where our sample is ∼0.25 dex more metal-rich. We interpret this offset as a result of the lower star formation rates (typically a factor of ∼10 lower) for a given stellar mass in our subluminous systems. Taking this effect into account, we conclude our objects are consistent with a fundamental metallicity relation recently proposed from unlensed observations. |
| doi_str_mv | 10.1111/j.1365-2966.2010.18161.x |
| format | Article |
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| ispartof | Monthly notices of the Royal Astronomical Society, 2011-05, Vol.413 (1), p.643-658 |
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| source | Oxford Journals Open Access Collection; Wiley Online Library Journals Frontfile Complete |
| subjects | Astronomy Astrophysics Cosmology and Extra-Galactic Astrophysics Earth, ocean, space Exact sciences and technology galaxies: abundances galaxies: evolution galaxies: high-redshift galaxies: kinematics and dynamics gravitational lensing: strong Physics Sciences of the Universe |
| title | The emission line properties of gravitationally lensed 1.5 < z < 5 galaxies |
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