The SDSS-IV extended Baryon Oscillation Spectroscopic Survey: selecting emission line galaxies using the Fisher discriminant
文献类型：期刊论文
| 作者 | Raichoor, A.1; Comparat, J.2,3; Delubac, T.4; Kneib, J. -P.4,5; Yeche, Ch.1; Zou, H.6 ; Abdalla, F. B.7,8; Dawson, K.9; de la Macorra, A.10; Fan, X.11
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| 刊名 | ASTRONOMY & ASTROPHYSICS
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| 出版日期 | 2016 |
| 卷号 | 585 |
| 关键词 | methods: data analysis galaxies: general galaxies: star formation galaxies: stellar content |
| 英文摘要 | We present a new selection technique of producing spectroscopic target catalogues for massive spectroscopic surveys for cosmology. This work was conducted in the context of the extended Baryon Oscillation Spectroscopic Survey (eBOSS), which will use similar to 200 000 emission line galaxies (EEGs) at 0.6 < z(spec),, < 1.0 to obtain a precise baryon acoustic oscillation measurement. Our proposed selection technique is based on optical and near-infrared broad-band filter photometry. We used a training sample to define a quantity, the Fisher discriminant (linear combination of colours), which correlates best with the desired properties of the target: redshift and [OII] flux. The proposed selections are simply done by applying a cut on magnitudes and this Fisher discriminant. We used public data and dedicated SDSS spectroscopy to quantify the redshift distribution and [0111 flux of our ELG target selections. We demonstrate that two of our selections fulfil the initial eBOSS/ELG redshift requirements: for a target density' of 180 deg(-2), similar to 70% of the selected objects have 0.6 < zspec < 1.0 and only similar to 1% of those galaxies in the range 0.6 < zspec < 1.0 are expected to have a catastrophic z(spec) estimate. Additionally, the stacked spectra and stacked deep images for those two selections show characteristic features of star -forming galaxies. The proposed approach using the Fisher discriminant could, however, be used to efficiently-select other galaxy populations, based on multi-band photometry, providing that spectroscopic information is available. This technique could thus be useful for other future massive spectroscopic surveys such as PFS, DESI, and 4MOST. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000369710300057 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5440]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.CEA, Ctr Saclay, IRFU, SPP, F-91191 Gif Sur Yvette, France 2.Univ Autonoma Madrid, Dept Fis Teor, E-28049 Madrid, Spain 3.Univ Autonoma Madrid, CSIC, Inst Fis Teor, E-28049 Madrid, Spain 4.Observ Sauverny, EPFL, Lab Astrophys, CH-1290 Versoix, Switzerland 5.Aix Marseille Univ, CNRS, LAM, UMR 7326, F-13388 Marseille, France 6.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China 7.UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England 8.Rhodes Univ, Dept Phys & Elect, POB 94, ZA-6140 Grahamstown, South Africa 9.Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA 10.Univ Nacl Autonoma Mexico, Inst Fis, AP 20-364, Mexico City 01000, DF, Mexico |
| 推荐引用方式 GB/T 7714 | Raichoor, A.,Comparat, J.,Delubac, T.,et al. The SDSS-IV extended Baryon Oscillation Spectroscopic Survey: selecting emission line galaxies using the Fisher discriminant[J]. ASTRONOMY & ASTROPHYSICS,2016,585. |
| APA | Raichoor, A..,Comparat, J..,Delubac, T..,Kneib, J. -P..,Yeche, Ch..,...&Zhou, Z..(2016).The SDSS-IV extended Baryon Oscillation Spectroscopic Survey: selecting emission line galaxies using the Fisher discriminant.ASTRONOMY & ASTROPHYSICS,585. |
| MLA | Raichoor, A.,et al."The SDSS-IV extended Baryon Oscillation Spectroscopic Survey: selecting emission line galaxies using the Fisher discriminant".ASTRONOMY & ASTROPHYSICS 585(2016). |
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