Dark Energy Survey Year 1 results: The effect of intracluster light on photometric redshifts for weak gravitational lensing

D. Gruen, Y. Zhang, A. Palmese, B. Yanny, V. Busti, B. Hoyle, P. Melchior, C. J. Miller, E. Rozo, E. S. Rykoff, T. N. Varga, F. B. Abdalla, S. Allam, J. Annis, S. Avila, D. Brooks, D. L. Burke, A. Carnero Rosell, M. Carrasco Kind, J. CarreteroR. Cawthon, M. Crocce, C. E. Cunha, L. N. da Costa, C. Davis, J. de Vicente, S. Desai, H. T. Diehl, J. P. Dietrich, A. Drlica-Wagner, B. Flaugher, P. Fosalba, J. Frieman, J. García-Bellido, E. Gaztanaga, D. W. Gerdes, R. A. Gruendl, J. Gschwend, D. L. Hollowood, K. Honscheid, D. J. James, T. Jeltema, E. Krause, R. Kron, K. Kuehn, N. Kuropatkin, O. Lahav, M. Lima, H. Lin, M. A.G. Maia, J. L. Marshall, F. Menanteau, R. Miquel, R. L.C. Ogando, A. A. Plazas, A. K. Romer, V. Scarpine, I. Sevilla-Noarbe, M. Smith, M. Soares-Santos, F. Sobreira, E. Suchyta, M. E.C. Swanson, G. Tarle, D. Thomas, V. Vikram, A. R. Walker

Research output: Contribution to journalReview article

1 Scopus citations

Abstract

We study the effect of diffuse intracluster light on the critical surface mass density estimated from photometric redshifts of lensing source galaxies, and the resulting bias in a weak lensing measurement of galaxy cluster mass. Under conservative assumptions, we find the bias to be negligible for imaging surveys like the Dark Energy Survey with a recommended scale cut of ≥200 kpc distance from cluster centres. For significantly deeper lensing source galaxy catalogues from present and future surveys like the Large Synoptic Survey Telescope program, more conservative scale and source magnitude cuts or a correction of the effect may be necessary to achieve percent level lensing measurement accuracy, especially at the massive end of the cluster population.

Original languageEnglish (US)
Pages (from-to)4389-4399
Number of pages11
JournalMonthly Notices of the Royal Astronomical Society
Volume488
Issue number3
DOIs
StatePublished - 2019

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Cosmology: observations
  • Galaxies: clusters: general
  • Galaxies: distances and redshifts
  • Gravitational lensing: weak

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    Gruen, D., Zhang, Y., Palmese, A., Yanny, B., Busti, V., Hoyle, B., Melchior, P., Miller, C. J., Rozo, E., Rykoff, E. S., Varga, T. N., Abdalla, F. B., Allam, S., Annis, J., Avila, S., Brooks, D., Burke, D. L., Rosell, A. C., Kind, M. C., ... Walker, A. R. (2019). Dark Energy Survey Year 1 results: The effect of intracluster light on photometric redshifts for weak gravitational lensing. Monthly Notices of the Royal Astronomical Society, 488(3), 4389-4399. https://doi.org/10.1093/mnras/stz2036