| The effects of ultraviolet photometry and binary interactions on photometric redshift and galaxy morphology | |
Zhang FH(张奉辉)1 ; Han ZW(韩占文)1; Li LF(李立芳)1; Dan HG(单红光)1; Zhang Y(张余)1,2; Zhang, FH (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
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| 发表期刊 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 2010-10-21 | |
| 卷号 | 408期号:2页码:1283-1306 |
| DOI | 10.1111/j.1365-2966.2010.17212.x |
| 产权排序 | 第1完成单位 |
| 收录类别 | SCI |
| 关键词 | Binaries: General Galaxies: Distances And Redshifts Galaxies: Fundamental Parameters Ultraviolet: Galaxies |
| 摘要 | Using the HYPERZ code and a template spectral library, which consists of four observed galaxy spectra from Coleman, Wu & Weedman (CWW) and eight spectral families built with evolutionary population synthesis models, we present photometric redshift (photo-z) estimates for a spectroscopic sample of 6531 galaxies. Spectroscopic redshifts are also available, and are selected from the Sloan Digital Sky Survey (SDSS) Data Release 7 (DR7) and the Galaxy Evolution Explorer (GALEX) Data Release 4 (DR4). There are also morphologies for a morphological sample of 1502 bright galaxies, which are from the catalogue of Fukugita et al., and these are also matched with SDSS DR7 and GALEX DR4. We find that the inclusion of F(UV) or N(UV), or both, decreases the number of catastrophic identifications (| z.(phot) - z.(spec)| > 1.0). If catastrophic identifications are removed, the inclusion of both FUV and NUV photometry mainly increases the number of non-catastrophic identifications in the low-redshift, g-r less than or similar to 0.8 and fainter r-magnitude regions. The inclusion of binary interactions mainly increases the number of non-catastrophic identifications and decreases the deviations in the 0.3 <= g-r <= 0.8 region when only using optical photometry. Based on the morphological galaxy sample, we find that the inclusion of ultraviolet (UV) photometry decreases and increases the probability that early types are classified as burst and E types, respectively. This increases the probability that late types are classified as CWW-Sbc and CWW-Scd types. If catastrophic identifications are excluded, the inclusion of UV data mainly increases the identifications of late types in all redshift, bluer g-r and r greater than or similar to 14 regions. Moreover, binary interactions mainly affect the determinations of E and S0 types. In comparison, we find that the reliability and completeness for early-and late-type selection by the HYPERZ code are less than those by the concentration index C = 2.6, the profile likelihood P(exp) - P(de)V = 0 and colour u-r = 2.22 criteria. Moreover, we find that N(UV)-u = 1.94 and 5.77 - 1.47(u-r) = F(UV)-u discriminators can be used as morphology selection indicators. These two criteria have comparable reliability and completeness for selecting early- and late-type galaxies to C = 2.6 criterion and higher completeness for early-type selection than the u-r = 2.22 criterion. |
| 项目资助者 | Chinese Natural Science Foundation [10773026, 10673029, 10821026, 2007CB15406] ; Yunnan Natural Science Foundation [2007A113M] ; Alfred P. Sloan Foundation ; National Science Foundation ; United States Department of Energy ; National Aeronautics and Space Administration (NASA) ; Japanese Monbukagakusho ; Max-Planck Society ; Higher Education Funding Council for England |
| 语种 | 英语 |
| 学科领域 | Astronomy & Astrophysics |
| 文章类型 | Article |
| ISSN | 0035-8711 |
| URL | 查看原文 |
| 归档日期 | 2010-10-12 |
| WOS记录号 | WOS:000282639100052 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | DIGITAL-SKY-SURVEY ; EVOLUTIONARY POPULATION SYNTHESIS ; SINGLE STELLAR POPULATIONS ; INITIAL MASS FUNCTION ; SUBDWARF-B-STARS ; COLOR ; COSMOS ; GALEX ; RESOLUTION ; CATALOG |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/4482 |
| 专题 | 大样本恒星演化研究组 |
| 通讯作者 | Zhang, FH (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China. |
| 作者单位 | 1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming, 650011, China 2.Graduate University of the Chinese Academy of Science, Beijing 100049, China |
| 第一作者单位 | 中国科学院云南天文台 |
| 推荐引用方式 GB/T 7714 | Zhang FH,Han ZW,Li LF,et al. The effects of ultraviolet photometry and binary interactions on photometric redshift and galaxy morphology[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2010,408(2):1283-1306. |
| APA | Zhang FH,Han ZW,Li LF,Dan HG,Zhang Y,&Zhang, FH .(2010).The effects of ultraviolet photometry and binary interactions on photometric redshift and galaxy morphology.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,408(2),1283-1306. |
| MLA | Zhang FH,et al."The effects of ultraviolet photometry and binary interactions on photometric redshift and galaxy morphology".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 408.2(2010):1283-1306. |
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