Search Menu
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information
Search Scholarly Publications

Title: Photometric Redshifts with the LSST. II. The Impact of Near-infrared and Near-ultraviolet Photometry

Abstract

Accurate photometric redshift (photo-z) estimates are essential to the cosmological science goals of the Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST). In this work, we use simulated photometry for mock galaxy catalogs to explore how LSST photo-z estimates can be improved by the addition of near-infrared (NIR) and/or ultraviolet (UV ) photometry from the Euclid, Wide-Field InfrarRed Survey Telescope (WFIRST), and/or Cosmological Advanced Survey Telescope for Optical and ultraviolet Research (CASTOR) space telescopes. Generally, we find that deeper optical photometry can reduce the standard deviation of the photo-z estimates more than adding NIR or UV filters but that additional filters are the only way to significantly lower the fraction of galaxies with catastrophically under- or overestimated photo-z. For Euclid, we find that the addition of JH 5σ photometric detections can reduce the standard deviation for galaxies with z > 1 (z > 0.3) by ~20% (~10%), and the fraction of outliers by ~40% (~25%). For WFIRST, we show how the addition of deep YJHK photometry could reduce the standard deviation by ≳50% at z > 1.5 and drastically reduce the fraction of outliers to just ~2% overall. For CASTOR, we find that the addition of itsmore » UV- and u-band photometry could reduce the standard deviation by ~30% and the fraction of outliers by ~50% for galaxies with z < 0.5. We also evaluate the photo-z results within sky areas that overlap with both the NIR and UV surveys and when spectroscopic training sets built from the surveys’ small-area deep fields are used.« less

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2];  [1]; ORCiD logo [1]; ORCiD logo [3]; ORCiD logo [3];  [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
+ Show Author Affiliations
  1. Univ. of Washington, Seattle, WA (United States). DiRAC Institute, Dept. of Astronomy
  2. University of California, Davis, Davis, CA (United States). Dept. of Physics
  3. National Research Council of Canada, Victoria (Canada)
Publication Date:
Research Org.:
Univ. of California, Davis, CA (United States); Univ. of Washington, Seattle, WA (United States); Stanford Univ., CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1802007
Grant/Contract Number:  
SC0009999; SC0011635; AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
The Astronomical Journal (Online)
Additional Journal Information:
Journal Name: The Astronomical Journal (Online); Journal Volume: 159; Journal Issue: 6; Journal ID: ISSN 1538-3881
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; Astronomy & Astrophysics

Citation Formats

Graham, Melissa L., Connolly, Andrew J., Wang, Winnie, Schmidt, Samuel J., Morrison, Christopher B., Ivezić, Željko, Fabbro, Sébastien, Côté, Patrick, Daniel, Scott F., Jones, R. Lynne, Jurić, Mario, Yoachim, Peter, and Kalmbach, J. Bryce. Photometric Redshifts with the LSST. II. The Impact of Near-infrared and Near-ultraviolet Photometry. United States: N. p., 2020. Web. doi:10.3847/1538-3881/ab8a43.
Copy to clipboard
Graham, Melissa L., Connolly, Andrew J., Wang, Winnie, Schmidt, Samuel J., Morrison, Christopher B., Ivezić, Željko, Fabbro, Sébastien, Côté, Patrick, Daniel, Scott F., Jones, R. Lynne, Jurić, Mario, Yoachim, Peter, & Kalmbach, J. Bryce. Photometric Redshifts with the LSST. II. The Impact of Near-infrared and Near-ultraviolet Photometry. United States. https://doi.org/10.3847/1538-3881/ab8a43
Copy to clipboard
Graham, Melissa L., Connolly, Andrew J., Wang, Winnie, Schmidt, Samuel J., Morrison, Christopher B., Ivezić, Željko, Fabbro, Sébastien, Côté, Patrick, Daniel, Scott F., Jones, R. Lynne, Jurić, Mario, Yoachim, Peter, and Kalmbach, J. Bryce. Wed . "Photometric Redshifts with the LSST. II. The Impact of Near-infrared and Near-ultraviolet Photometry". United States. https://doi.org/10.3847/1538-3881/ab8a43. https://www.osti.gov/servlets/purl/1802007.
Copy to clipboard
@article{osti_1802007,
title = {Photometric Redshifts with the LSST. II. The Impact of Near-infrared and Near-ultraviolet Photometry},
author = {Graham, Melissa L. and Connolly, Andrew J. and Wang, Winnie and Schmidt, Samuel J. and Morrison, Christopher B. and Ivezić, Željko and Fabbro, Sébastien and Côté, Patrick and Daniel, Scott F. and Jones, R. Lynne and Jurić, Mario and Yoachim, Peter and Kalmbach, J. Bryce},
abstractNote = {Accurate photometric redshift (photo-z) estimates are essential to the cosmological science goals of the Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST). In this work, we use simulated photometry for mock galaxy catalogs to explore how LSST photo-z estimates can be improved by the addition of near-infrared (NIR) and/or ultraviolet (UV ) photometry from the Euclid, Wide-Field InfrarRed Survey Telescope (WFIRST), and/or Cosmological Advanced Survey Telescope for Optical and ultraviolet Research (CASTOR) space telescopes. Generally, we find that deeper optical photometry can reduce the standard deviation of the photo-z estimates more than adding NIR or UV filters but that additional filters are the only way to significantly lower the fraction of galaxies with catastrophically under- or overestimated photo-z. For Euclid, we find that the addition of JH 5σ photometric detections can reduce the standard deviation for galaxies with z > 1 (z > 0.3) by ~20% (~10%), and the fraction of outliers by ~40% (~25%). For WFIRST, we show how the addition of deep YJHK photometry could reduce the standard deviation by ≳50% at z > 1.5 and drastically reduce the fraction of outliers to just ~2% overall. For CASTOR, we find that the addition of its UV- and u-band photometry could reduce the standard deviation by ~30% and the fraction of outliers by ~50% for galaxies with z < 0.5. We also evaluate the photo-z results within sky areas that overlap with both the NIR and UV surveys and when spectroscopic training sets built from the surveys’ small-area deep fields are used.},
doi = {10.3847/1538-3881/ab8a43},
journal = {The Astronomical Journal (Online)},
number = 6,
volume = 159,
place = {United States},
year = {Wed May 13 00:00:00 EDT 2020},
month = {Wed May 13 00:00:00 EDT 2020}
}
Copy to clipboard
Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.3847/1538-3881/ab8a43
Copyright Statement
Other availability
Search WorldCat Search WorldCat to find libraries that may hold this journal
Save / Share:
Export Metadata
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.

Works referenced in this record:

Simulations of the formation, evolution and clustering of galaxies and quasars
journal, June 2005

  • Springel, Volker; White, Simon D. M.; Jenkins, Adrian
  • Nature, Vol. 435, Issue 7042
  • DOI: 10.1038/nature03597

CASTOR: the Cosmological Advanced Survey Telescope for Optical and Ultraviolet Research
conference, September 2012

  • Côte, Patrick; Scott, Alan; Balogh, Michael
  • SPIE Astronomical Telescopes + Instrumentation, SPIE Proceedings
  • DOI: 10.1117/12.926198

Lightcone mock catalogues from semi-analytic models of galaxy formation – I. Construction and application to the BzK colour selection
journal, December 2012

  • Merson, Alexander I.; Baugh, Carlton M.; Helly, John C.
  • Monthly Notices of the Royal Astronomical Society, Vol. 429, Issue 1
  • DOI: 10.1093/mnras/sts355

Photometric redshift requirements for lens galaxies in galaxy-galaxy lensing analyses: Lensing with photometric redshifts
journal, January 2012

The CFHT Large Area U-band Deep Survey (CLAUDS)
journal, September 2019

  • Sawicki, Marcin; Arnouts, Stephane; Huang, Jiasheng
  • Monthly Notices of the Royal Astronomical Society
  • DOI: 10.1093/mnras/stz2522

The Canada–France Imaging Survey: First Results from the u-Band Component
journal, October 2017

  • Ibata, Rodrigo A.; McConnachie, Alan; Cuillandre, Jean-Charles
  • The Astrophysical Journal, Vol. 848, Issue 2
  • DOI: 10.3847/1538-4357/aa855c

Spectroscopic needs for imaging dark energy experiments
journal, March 2015

The Euclid mission design
conference, July 2016

  • Racca, Giuseppe D.; Laureijs, René; Stagnaro, Luca
  • SPIE Astronomical Telescopes + Instrumentation, SPIE Proceedings
  • DOI: 10.1117/12.2230762

Scientific Synergy between LSST and Euclid
journal, December 2017

  • Rhodes, Jason; Nichol, Robert C.; Aubourg, Éric
  • The Astrophysical Journal Supplement Series, Vol. 233, Issue 2
  • DOI: 10.3847/1538-4365/aa96b0

PHAT: PHoto- z Accuracy Testing
journal, November 2010

Photometric Redshifts with the LSST: Evaluating Survey Observing Strategies
journal, January 2018

  • Graham, Melissa L.; Connolly, Andrew J.; Ivezić, Željko
  • The Astronomical Journal, Vol. 155, Issue 1
  • DOI: 10.3847/1538-3881/aa99d4

An Atlas of Galaxy Spectral Energy Distributions from the Ultraviolet to the Mid-Infrared
journal, May 2014

  • Brown, Michael J. I.; Moustakas, John; Smith, J. -D. T.
  • The Astrophysical Journal Supplement Series, Vol. 212, Issue 2
  • DOI: 10.1088/0067-0049/212/2/18

How sensitive are predicted galaxy luminosities to the choice of stellar population synthesis model?
journal, February 2014

  • Gonzalez-Perez, V.; Lacey, C. G.; Baugh, C. M.
  • Monthly Notices of the Royal Astronomical Society, Vol. 439, Issue 1
  • DOI: 10.1093/mnras/stt2410

The many flavours of photometric redshifts
journal, June 2018

Clues on the hot star content and the ultraviolet output of elliptical galaxies
journal, November 1990

  • Greggio, Laura; Renzini, Alvio
  • The Astrophysical Journal, Vol. 364
  • DOI: 10.1086/169384

An end-to-end simulation framework for the Large Synoptic Survey Telescope
conference, August 2014

  • Connolly, Andrew J.; Angeli, George Z.; Chandrasekharan, Srinivasan
  • SPIE Astronomical Telescopes + Instrumentation, SPIE Proceedings
  • DOI: 10.1117/12.2054953

Impact of photometric redshifts on the galaxy power spectrum and BAO scale in the LSST survey
journal, March 2019

Update on the CASTOR mission concept: scientific opportunities in the Euclid and WFIRST era
conference, July 2014

  • Côté, Patrick; Scott, Alan
  • SPIE Astronomical Telescopes + Instrumentation, SPIE Proceedings
  • DOI: 10.1117/12.2055247

Weak Lensing for Precision Cosmology
journal, September 2018

Cosmology with the Large Synoptic Survey Telescope: an overview
journal, April 2018

Photometric redshifts for the Dark Energy Survey and VISTA and implications for large-scale structure
journal, May 2008

Photometric redshifts from SDSS images using a convolutional neural network
journal, December 2018

LSST: From Science Drivers to Reference Design and Anticipated Data Products
journal, March 2019

  • Ivezić, Željko; Kahn, Steven M.; Tyson, J. Anthony
  • The Astrophysical Journal, Vol. 873, Issue 2
  • DOI: 10.3847/1538-4357/ab042c
    Sort by:
    [ × clear filter / sort ]

    Similar Records in DOE PAGES and OSTI.GOV collections: