Photometric Redshift (PhotoZ) Based on Intermediate bands & Broad bands Yan-Bin, Yang 杨雁宾...
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Transcript of Photometric Redshift (PhotoZ) Based on Intermediate bands & Broad bands Yan-Bin, Yang 杨雁宾...
![Page 1: Photometric Redshift (PhotoZ) Based on Intermediate bands & Broad bands Yan-Bin, Yang 杨雁宾 Collaborators: Collaborators:. Xu, Zhou 周旭 Li-Fang, Xia 夏丽芳.](https://reader035.fdocument.pub/reader035/viewer/2022062301/5697bfeb1a28abf838cb8285/html5/thumbnails/1.jpg)
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Photometric Redshift (PhotoZ)Based on
Intermediate bands & Broad bands
Yan-Bin, Yang Yan-Bin, Yang 杨雁宾杨雁宾Collaborators: Collaborators: .
Xu, Zhou Xu, Zhou 周旭周旭Li-Fang, Xia Li-Fang, Xia 夏丽芳夏丽芳
Zhong-Lue, Wen Zhong-Lue, Wen 文中略文中略(National Astronomical Observatories, CAS)(National Astronomical Observatories, CAS)
Qi-Rong, Yuan Qi-Rong, Yuan 袁启荣袁启荣(Department of Physics, Nanjing Normal University)(Department of Physics, Nanjing Normal University)
2005-11-23, 2005-11-23, 威海 威海 (Wei-Hai)(Wei-Hai)
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Outline
IntroductionRedshift, SED, z-SED
Basic methodsPhotometric SystemsPhotoZ by BATC and BATC+SDSSPhotoZ by SDSSStar-SED and galaxy SED
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Introduction
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V
Redshift (z)
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Sepctral Energy Distribution (SED)
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Sepctral Energy Distribution (SED)
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Problems of Extra-Galactic Research, Proceedings from IAU Symposium no. 15.(1962IAUS...15..390B )
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Basic methods
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Basic methods - I
Puschell et al. 1982ApJ...257L..57P Bolzonella et al. 2000A&A...363..476B (HYPERZ)Padmanabhan et al. 2005MNRAS.359..237P
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Basic methods - II
Koo 1999ASPC..191....3K (and references therein)
Connolly et al. 1995AJ....110.2655CWang et al. 1998AJ....116.2081W
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Other methods
Artificial Neural Network (ANN) Vanzella et al. 2004A&A...423..761V Collister & Lahav 2004PASP..116..345CBayesian estimation Benitez 2000ApJ...536..571B
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Photometric Systems
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BATC
(Beijing-Arizona-Taiwan-Connecticut)
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Filter system of BATC
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SDSS
Sloan Digital Sky Survey
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Filter system of SDSS
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PhotoZ by BATC and BATC+SDSS
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Basic methods - I
Puschell et al. 1982ApJ...257L..57P Bolzonella et al. 2000A&A...363..476B (HYPERZ)Padmanabhan et al. 2005MNRAS.359..237P
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Zhou et al. 2003, PASJ, 55, 891
BATC only
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Yuan et al. 2001, AJ, 122, 1718
BATC only
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Yuan et al. 2003, ApJS, 149, 53
Yang et al. 2004, ApJ, 600, 141
BATC+SDSS
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PhotoZ by SDSS
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Previous worksChisq-minimaztion Padmanabhan et al. 2005MNRAS.359..237P
Artificial Neural Network (ANN) Vanzella et al. 2004A&A...423..761V Collister & Lahav 2004PASP..116..345C
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PhotoZ by SDSS (Yang et al. 2005)
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PhotoZ by SDSS (Yang et al. 2005)
Chisq^2
Color-color-redshift (CCR) relationLinear correction
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CCR
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CCR
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CCR
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σ ~ 0.024
CCR
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Many Thanks
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Many Thanks