Stellar metallicities beyond the Local Group: the potential of J-band spectroscopy with extremely large telescopes
文献类型：期刊论文
| 作者 | Evans, C. J.1; Davies, B.2,3,4; Kudritzki, R. -P.5,6; Puech, M.7; Yang, Y.7,8; Cuby, J. -G.9; Figer, D. F.2; Lehnert, M. D.7; Morris, S. L.10; Rousset, G.11 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2011-03-01 |
| 卷号 | 527 |
| 关键词 | instrumentation: adaptive optics instrumentation: spectrographs techniques: spectroscopic Galaxy: stellar content stars: fundamental parameters |
| 英文摘要 | We present simulated J-band spectroscopy of red giants and supergiants with a 42 m European Extremely Large Telescope (E-ELT), using tools developed toward the EAGLE Phase A instrument study. The simulated spectra are used to demonstrate the validity of the 1.15-1.22 mu m region to recover accurate stellar metallicities from Solar and metal-poor (one tenth Solar) spectral templates. From tests at spectral resolving powers of four and ten thousand, we require continuum signal-to-noise ratios in excess of 50 (per two-pixel resolution element) to recover the input metallicity to within 0.1 dex. We highlight the potential of direct estimates of stellar metallicites (over the range -1 < [Fe/H] < 0) of red giants with the E-ELT, reaching out to distances of similar to 5 Mpc for stars near the tip of the red giant branch. The same simulations are also used to illustrate the potential for quantitative spectroscopy of red supergiants beyond the Local Volume to tens of Mpc. Calcium triplet observations in the I-band are also simulated to provide a comparison with contemporary techniques. Assuming the EAGLE instrument parameters and simulated performances from adaptive optics, the J-band method is more sensitive in terms of recovering metallicity estimates for a given target. This appears very promising for ELT studies of red giants and supergiants, offering a direct metallicity tracer at a wavelength which is less affected by extinction than shortward diagnostics and, via adaptive optics, with better image quality. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000287484100065 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8094]  |
| 专题 | 国家天文台_月球与深空探测研究部 |
| 作者单位 | 1.Royal Observ Edinburgh, UK Astron Technol Ctr, Edinburgh EH9 3HJ, Midlothian, Scotland 2.Rochester Inst Technol, Rochester, NY 14623 USA 3.Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England 4.Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England 5.Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA 6.Max Planck Inst Astrophys, D-85748 Garching, Germany 7.Observ Paris, GEPI, F-92195 Meudon, France 8.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China 9.OAMP, LAM, F-13388 Marseille 13, France 10.Univ Durham, Dept Phys, Durham DH1 3LE, England |
| 推荐引用方式 GB/T 7714 | Evans, C. J.,Davies, B.,Kudritzki, R. -P.,et al. Stellar metallicities beyond the Local Group: the potential of J-band spectroscopy with extremely large telescopes[J]. ASTRONOMY & ASTROPHYSICS,2011,527. |
| APA | Evans, C. J..,Davies, B..,Kudritzki, R. -P..,Puech, M..,Yang, Y..,...&Rousset, G..(2011).Stellar metallicities beyond the Local Group: the potential of J-band spectroscopy with extremely large telescopes.ASTRONOMY & ASTROPHYSICS,527. |
| MLA | Evans, C. J.,et al."Stellar metallicities beyond the Local Group: the potential of J-band spectroscopy with extremely large telescopes".ASTRONOMY & ASTROPHYSICS 527(2011). |
入库方式： OAI收割
来源：国家天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。