PHOTOMETRIC REDSHIFTS IN THE HAWAII-HUBBLE DEEP FIELD-NORTH (H-HDF-N)
Abstract
We derive photometric redshifts (z {sub phot}) for sources in the entire (∼0.4 deg{sup 2}) Hawaii-Hubble Deep Field-North (H-HDF-N) field with the EAzY code, based on point-spread-function-matched photometry of 15 broad bands from the ultraviolet (U band) to mid-infrared (IRAC 4.5 μm). Our catalog consists of a total of 131,678 sources. We evaluate the z {sub phot} quality by comparing z {sub phot} with spectroscopic redshifts (z {sub spec}) when available, and find a value of normalized median absolute deviation σ{sub NMAD} = 0.029 and an outlier fraction of 5.5% (outliers are defined as sources having |z{sub phot} – z{sub spec} |/(1 + z{sub spec} ) > 0.15) for non-X-ray sources. More specifically, we obtain σ{sub NMAD} = 0.024 with 2.7% outliers for sources brighter than R = 23 mag, σ{sub NMAD} = 0.035 with 7.4% outliers for sources fainter than R = 23 mag, σ{sub NMAD} = 0.026 with 3.9% outliers for sources having z < 1, and σ{sub NMAD} = 0.034 with 9.0% outliers for sources having z > 1. Our z {sub phot} quality shows an overall improvement over an earlier z {sub phot} work that focused only on the central H-HDF-N area. We also classify each object as a star or galaxy throughmore »
- Authors:
-
- Key Laboratory for Research in Galaxies and Cosmology, Center for Astrophysics, Department of Astronomy, University of Science and Technology of China, Chinese Academy of Sciences, Hefei, Anhui 230026 (China)
- Department of Astronomy and Astrophysics, 525 Davey Lab, The Pennsylvania State University, University Park, PA 16802 (United States)
- Department of Physics, Durham University, Durham DH1 3LE (United Kingdom)
- Instituto de Astrofísica, Facultad de Física, Pontificia Universidad Católica de Chile, 306, Santiago 22 (Chile)
- Department of Physics, Purdue University, West Lafayette, IN 47907 (United States)
- The Johns Hopkins University, Homewood Campus, Baltimore, MD 21218 (United States)
- Department of Astronomy, Peking University, Beijing 100871 (China)
- Publication Date:
- OSTI Identifier:
- 22340125
- Resource Type:
- Journal Article
- Journal Name:
- Astrophysical Journal, Supplement Series
- Additional Journal Information:
- Journal Volume: 215; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0067-0049
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CATALOGS; ENERGY SPECTRA; GALACTIC EVOLUTION; GALAXIES; GALAXY NUCLEI; PHOTOMETRY; RED SHIFT; STARS; ULTRAVIOLET RADIATION; X-RAY SOURCES
Citation Formats
Yang, G., Xue, Y. Q., Kong, X., Wang, J. -X., Yuan, Y. -F., Zhou, H. Y., Luo, B., Brandt, W. N., Alexander, D. M., Bauer, F. E., Cui, W., Lehmer, B. D., Wu, X. -B., and Yuan, F., E-mail: yg1991@mail.ustc.edu.cn, E-mail: xuey@ustc.edu.cn. PHOTOMETRIC REDSHIFTS IN THE HAWAII-HUBBLE DEEP FIELD-NORTH (H-HDF-N). United States: N. p., 2015.
Web. doi:10.1088/0067-0049/215/2/27.
Yang, G., Xue, Y. Q., Kong, X., Wang, J. -X., Yuan, Y. -F., Zhou, H. Y., Luo, B., Brandt, W. N., Alexander, D. M., Bauer, F. E., Cui, W., Lehmer, B. D., Wu, X. -B., & Yuan, F., E-mail: yg1991@mail.ustc.edu.cn, E-mail: xuey@ustc.edu.cn. PHOTOMETRIC REDSHIFTS IN THE HAWAII-HUBBLE DEEP FIELD-NORTH (H-HDF-N). United States. https://doi.org/10.1088/0067-0049/215/2/27
Yang, G., Xue, Y. Q., Kong, X., Wang, J. -X., Yuan, Y. -F., Zhou, H. Y., Luo, B., Brandt, W. N., Alexander, D. M., Bauer, F. E., Cui, W., Lehmer, B. D., Wu, X. -B., and Yuan, F., E-mail: yg1991@mail.ustc.edu.cn, E-mail: xuey@ustc.edu.cn. 2015.
"PHOTOMETRIC REDSHIFTS IN THE HAWAII-HUBBLE DEEP FIELD-NORTH (H-HDF-N)". United States. https://doi.org/10.1088/0067-0049/215/2/27.
@article{osti_22340125,
title = {PHOTOMETRIC REDSHIFTS IN THE HAWAII-HUBBLE DEEP FIELD-NORTH (H-HDF-N)},
author = {Yang, G. and Xue, Y. Q. and Kong, X. and Wang, J. -X. and Yuan, Y. -F. and Zhou, H. Y. and Luo, B. and Brandt, W. N. and Alexander, D. M. and Bauer, F. E. and Cui, W. and Lehmer, B. D. and Wu, X. -B. and Yuan, F., E-mail: yg1991@mail.ustc.edu.cn, E-mail: xuey@ustc.edu.cn},
abstractNote = {We derive photometric redshifts (z {sub phot}) for sources in the entire (∼0.4 deg{sup 2}) Hawaii-Hubble Deep Field-North (H-HDF-N) field with the EAzY code, based on point-spread-function-matched photometry of 15 broad bands from the ultraviolet (U band) to mid-infrared (IRAC 4.5 μm). Our catalog consists of a total of 131,678 sources. We evaluate the z {sub phot} quality by comparing z {sub phot} with spectroscopic redshifts (z {sub spec}) when available, and find a value of normalized median absolute deviation σ{sub NMAD} = 0.029 and an outlier fraction of 5.5% (outliers are defined as sources having |z{sub phot} – z{sub spec} |/(1 + z{sub spec} ) > 0.15) for non-X-ray sources. More specifically, we obtain σ{sub NMAD} = 0.024 with 2.7% outliers for sources brighter than R = 23 mag, σ{sub NMAD} = 0.035 with 7.4% outliers for sources fainter than R = 23 mag, σ{sub NMAD} = 0.026 with 3.9% outliers for sources having z < 1, and σ{sub NMAD} = 0.034 with 9.0% outliers for sources having z > 1. Our z {sub phot} quality shows an overall improvement over an earlier z {sub phot} work that focused only on the central H-HDF-N area. We also classify each object as a star or galaxy through template spectral energy distribution fitting and complementary morphological parameterization, resulting in 4959 stars and 126,719 galaxies. Furthermore, we match our catalog with the 2 Ms Chandra Deep Field-North main X-ray catalog. For the 462 matched non-stellar X-ray sources (281 having z {sub spec}), we improve their z {sub phot} quality by adding three additional active galactic nucleus templates, achieving σ{sub NMAD} = 0.035 and an outlier fraction of 12.5%. We make our catalog publicly available presenting both photometry and z {sub phot}, and provide guidance on how to make use of our catalog.},
doi = {10.1088/0067-0049/215/2/27},
url = {https://www.osti.gov/biblio/22340125},
journal = {Astrophysical Journal, Supplement Series},
issn = {0067-0049},
number = 2,
volume = 215,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 2015},
month = {Thu Jan 01 00:00:00 EST 2015}
}