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Physical conditions of a lensed star-forming galaxy at z=1.7
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Rigby, Jane Gladders, M. Becker, G. D. Sharon, K. Wuyts, E. |
| Copyright Year | 2010 |
| Description | We report rest-frame optical Keck/NIRSPEC spectroscopy of the brightest lensed galaxy yet discovered, RCSGA 032727-132609 at z=1.7037. From precise measurements of the nebular lines, we infer a number of physical properties: redshift, extinction, star formation rate, ionization parameter, electron density, electron temperature, oxygen abundance, and N/O, Ne/O, and Ar/O abundance ratios. The limit on [O III] 4363 A tightly constrains the oxygen abundance via the "direct" or Tc method, for the first time in all metallicity galaxy at z approx.2. We compare this result to several standard "bright-line" O abundance diagnostics, thereby testing these empirically calibrated diagnostics in situ. Finally, we explore the positions of lensed and unlensed galaxies in standard diagnostic diagrams, and explore the diversity of ionization conditions and mass-metallicity ratios at z=2. |
| File Size | 1819111 |
| Page Count | 16 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20110007198 |
| Archival Resource Key | ark:/13960/t8kd6w94d |
| Language | English |
| Publisher Date | 2010-05-25 |
| Access Restriction | Open |
| Subject Keyword | Astronomy Spectroscopy Red Shift Gravitational Lenses Oxygen Galaxies Electron Density Concentration Extinction Star Formation Rate Stellar Mass Metallicity Ionization Diagnosis Electron Energy Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
