Galaxy bias from the Dark Energy Survey Science Verification data: Combining galaxy density maps and weak lensing maps

C. Chang, A. Pujol, E. Gaztañaga, A. Amara, A. Réfrégier, D. Bacon, M. R. Becker, C. Bonnett, J. Carretero, F. J. Castander, M. Crocce, P. Fosalba, T. Giannantonio, W. Hartley, M. Jarvis, T. Kacprzak, A. J. Ross, E. Sheldon, M. A. Troxel, V. VikramJ. Zuntz, T. M.C. Abbott, F. B. Abdalla, S. Allam, J. Annis, A. Benoit-Lévy, E. Bertin, D. Brooks, E. Buckley-Geer, D. L. Burke, D. Capozzi, A. Carnero Rosell, Carrasco Kind, C. E. Cunha, C. B. D'Andrea, L. N. da Costa, S. Desai, H. T. Diehl, J. P. Dietrich, P. Doel, T. F. Eifler, J. Estrada, A. E. Evrard, B. Flaugher, J. Frieman, D. A. Goldstein, D. Gruen, R. A. Gruendl, G. Gutierrez, K. Honscheid, B. Jain, D. J. James, K. Kuehn, N. Kuropatkin, O. Lahav, T. S. Li, M. Lima, J. L. Marshall, P. Martini, P. Melchior, C. J. Miller, R. Miquel, J. J. Mohr, R. C. Nichol, B. Nord, R. Ogando, A. A. Plazas, K. Reil, A. K. Romer, A. Roodman, E. S. Rykoff, E. Sanchez, V. Scarpine, M. Schubnell, I. Sevilla-Noarbe, R. C. Smith, M. Soares-Santos, F. Sobreira, E. Suchyta, M. E.C. Swanson, G. Tarle, D. Thomas, A. R. Walker

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We measure the redshift evolution of galaxy bias for a magnitude-limited galaxy sample by combining the galaxy density maps and weak lensing shear maps for a ~116 deg2 area of the Dark Energy Survey (DES) Science Verification (SV) data. This method was first developed in Amara et al. and later re-examined in a companion paper with rigorous simulation tests and analytical treatment of tomographic measurements. In this work we apply this method to the DES SV data and measure the galaxy bias for a i < 22.5 galaxy sample. We find the galaxy bias and 1σ error bars in four photometric redshift bins to be 1.12 ± 0.19 (z = 0.2-0.4), 0.97 ± 0.15 (z = 0.4-0.6), 1.38 ± 0.39 (z = 0.6-0.8), and 1.45 ± 0.56 (z = 0.8-1.0). These measurements are consistent at the 2σ level with measurements on the same data set using galaxy clustering and cross-correlation of galaxies with cosmic microwave background lensing, with most of the redshift bins consistent within the 1σ error bars. In addition, our method provides the only σ8 independent constraint among the three. We forward model the main observational effects using mock galaxy catalogues by including shape noise, photo-z errors, and masking effects. We show that our bias measurement from the data is consistent with that expected from simulations. With the forthcoming full DES data set, we expect this method to provide additional constraints on the galaxy bias measurement from more traditional methods. Furthermore, in the process of our measurement, we build up a 3D mass map that allows further exploration of the dark matter distribution and its relation to galaxy evolution.

Original languageEnglish (US)
Pages (from-to)3203-3216
Number of pages14
JournalMonthly Notices of the Royal Astronomical Society
Volume459
Issue number3
DOIs
StatePublished - Jul 1 2016
Externally publishedYes

Fingerprint

dark energy
galaxies
energy
simulation
method
science
masking
cross correlation
catalogs
dark matter
shear
microwaves
effect

Keywords

  • Gravitational lensing: Weak
  • Large-scale structure of Universe
  • Surveys

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Galaxy bias from the Dark Energy Survey Science Verification data : Combining galaxy density maps and weak lensing maps. / Chang, C.; Pujol, A.; Gaztañaga, E.; Amara, A.; Réfrégier, A.; Bacon, D.; Becker, M. R.; Bonnett, C.; Carretero, J.; Castander, F. J.; Crocce, M.; Fosalba, P.; Giannantonio, T.; Hartley, W.; Jarvis, M.; Kacprzak, T.; Ross, A. J.; Sheldon, E.; Troxel, M. A.; Vikram, V.; Zuntz, J.; Abbott, T. M.C.; Abdalla, F. B.; Allam, S.; Annis, J.; Benoit-Lévy, A.; Bertin, E.; Brooks, D.; Buckley-Geer, E.; Burke, D. L.; Capozzi, D.; Rosell, A. Carnero; Kind, Carrasco; Cunha, C. E.; D'Andrea, C. B.; da Costa, L. N.; Desai, S.; Diehl, H. T.; Dietrich, J. P.; Doel, P.; Eifler, T. F.; Estrada, J.; Evrard, A. E.; Flaugher, B.; Frieman, J.; Goldstein, D. A.; Gruen, D.; Gruendl, R. A.; Gutierrez, G.; Honscheid, K.; Jain, B.; James, D. J.; Kuehn, K.; Kuropatkin, N.; Lahav, O.; Li, T. S.; Lima, M.; Marshall, J. L.; Martini, P.; Melchior, P.; Miller, C. J.; Miquel, R.; Mohr, J. J.; Nichol, R. C.; Nord, B.; Ogando, R.; Plazas, A. A.; Reil, K.; Romer, A. K.; Roodman, A.; Rykoff, E. S.; Sanchez, E.; Scarpine, V.; Schubnell, M.; Sevilla-Noarbe, I.; Smith, R. C.; Soares-Santos, M.; Sobreira, F.; Suchyta, E.; Swanson, M. E.C.; Tarle, G.; Thomas, D.; Walker, A. R.

In: Monthly Notices of the Royal Astronomical Society, Vol. 459, No. 3, 01.07.2016, p. 3203-3216.

Research output: Contribution to journalArticle

Chang, C, Pujol, A, Gaztañaga, E, Amara, A, Réfrégier, A, Bacon, D, Becker, MR, Bonnett, C, Carretero, J, Castander, FJ, Crocce, M, Fosalba, P, Giannantonio, T, Hartley, W, Jarvis, M, Kacprzak, T, Ross, AJ, Sheldon, E, Troxel, MA, Vikram, V, Zuntz, J, Abbott, TMC, Abdalla, FB, Allam, S, Annis, J, Benoit-Lévy, A, Bertin, E, Brooks, D, Buckley-Geer, E, Burke, DL, Capozzi, D, Rosell, AC, Kind, C, Cunha, CE, D'Andrea, CB, da Costa, LN, Desai, S, Diehl, HT, Dietrich, JP, Doel, P, Eifler, TF, Estrada, J, Evrard, AE, Flaugher, B, Frieman, J, Goldstein, DA, Gruen, D, Gruendl, RA, Gutierrez, G, Honscheid, K, Jain, B, James, DJ, Kuehn, K, Kuropatkin, N, Lahav, O, Li, TS, Lima, M, Marshall, JL, Martini, P, Melchior, P, Miller, CJ, Miquel, R, Mohr, JJ, Nichol, RC, Nord, B, Ogando, R, Plazas, AA, Reil, K, Romer, AK, Roodman, A, Rykoff, ES, Sanchez, E, Scarpine, V, Schubnell, M, Sevilla-Noarbe, I, Smith, RC, Soares-Santos, M, Sobreira, F, Suchyta, E, Swanson, MEC, Tarle, G, Thomas, D & Walker, AR 2016, 'Galaxy bias from the Dark Energy Survey Science Verification data: Combining galaxy density maps and weak lensing maps', Monthly Notices of the Royal Astronomical Society, vol. 459, no. 3, pp. 3203-3216. https://doi.org/10.1093/mnras/stw861
Chang, C. ; Pujol, A. ; Gaztañaga, E. ; Amara, A. ; Réfrégier, A. ; Bacon, D. ; Becker, M. R. ; Bonnett, C. ; Carretero, J. ; Castander, F. J. ; Crocce, M. ; Fosalba, P. ; Giannantonio, T. ; Hartley, W. ; Jarvis, M. ; Kacprzak, T. ; Ross, A. J. ; Sheldon, E. ; Troxel, M. A. ; Vikram, V. ; Zuntz, J. ; Abbott, T. M.C. ; Abdalla, F. B. ; Allam, S. ; Annis, J. ; Benoit-Lévy, A. ; Bertin, E. ; Brooks, D. ; Buckley-Geer, E. ; Burke, D. L. ; Capozzi, D. ; Rosell, A. Carnero ; Kind, Carrasco ; Cunha, C. E. ; D'Andrea, C. B. ; da Costa, L. N. ; Desai, S. ; Diehl, H. T. ; Dietrich, J. P. ; Doel, P. ; Eifler, T. F. ; Estrada, J. ; Evrard, A. E. ; Flaugher, B. ; Frieman, J. ; Goldstein, D. A. ; Gruen, D. ; Gruendl, R. A. ; Gutierrez, G. ; Honscheid, K. ; Jain, B. ; James, D. J. ; Kuehn, K. ; Kuropatkin, N. ; Lahav, O. ; Li, T. S. ; Lima, M. ; Marshall, J. L. ; Martini, P. ; Melchior, P. ; Miller, C. J. ; Miquel, R. ; Mohr, J. J. ; Nichol, R. C. ; Nord, B. ; Ogando, R. ; Plazas, A. A. ; Reil, K. ; Romer, A. K. ; Roodman, A. ; Rykoff, E. S. ; Sanchez, E. ; Scarpine, V. ; Schubnell, M. ; Sevilla-Noarbe, I. ; Smith, R. C. ; Soares-Santos, M. ; Sobreira, F. ; Suchyta, E. ; Swanson, M. E.C. ; Tarle, G. ; Thomas, D. ; Walker, A. R. / Galaxy bias from the Dark Energy Survey Science Verification data : Combining galaxy density maps and weak lensing maps. In: Monthly Notices of the Royal Astronomical Society. 2016 ; Vol. 459, No. 3. pp. 3203-3216.
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title = "Galaxy bias from the Dark Energy Survey Science Verification data: Combining galaxy density maps and weak lensing maps",
abstract = "We measure the redshift evolution of galaxy bias for a magnitude-limited galaxy sample by combining the galaxy density maps and weak lensing shear maps for a ~116 deg2 area of the Dark Energy Survey (DES) Science Verification (SV) data. This method was first developed in Amara et al. and later re-examined in a companion paper with rigorous simulation tests and analytical treatment of tomographic measurements. In this work we apply this method to the DES SV data and measure the galaxy bias for a i < 22.5 galaxy sample. We find the galaxy bias and 1σ error bars in four photometric redshift bins to be 1.12 ± 0.19 (z = 0.2-0.4), 0.97 ± 0.15 (z = 0.4-0.6), 1.38 ± 0.39 (z = 0.6-0.8), and 1.45 ± 0.56 (z = 0.8-1.0). These measurements are consistent at the 2σ level with measurements on the same data set using galaxy clustering and cross-correlation of galaxies with cosmic microwave background lensing, with most of the redshift bins consistent within the 1σ error bars. In addition, our method provides the only σ8 independent constraint among the three. We forward model the main observational effects using mock galaxy catalogues by including shape noise, photo-z errors, and masking effects. We show that our bias measurement from the data is consistent with that expected from simulations. With the forthcoming full DES data set, we expect this method to provide additional constraints on the galaxy bias measurement from more traditional methods. Furthermore, in the process of our measurement, we build up a 3D mass map that allows further exploration of the dark matter distribution and its relation to galaxy evolution.",
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year = "2016",
month = "7",
day = "1",
doi = "10.1093/mnras/stw861",
language = "English (US)",
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journal = "Monthly Notices of the Royal Astronomical Society",
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TY - JOUR

T1 - Galaxy bias from the Dark Energy Survey Science Verification data

T2 - Combining galaxy density maps and weak lensing maps

AU - Chang, C.

AU - Pujol, A.

AU - Gaztañaga, E.

AU - Amara, A.

AU - Réfrégier, A.

AU - Bacon, D.

AU - Becker, M. R.

AU - Bonnett, C.

AU - Carretero, J.

AU - Castander, F. J.

AU - Crocce, M.

AU - Fosalba, P.

AU - Giannantonio, T.

AU - Hartley, W.

AU - Jarvis, M.

AU - Kacprzak, T.

AU - Ross, A. J.

AU - Sheldon, E.

AU - Troxel, M. A.

AU - Vikram, V.

AU - Zuntz, J.

AU - Abbott, T. M.C.

AU - Abdalla, F. B.

AU - Allam, S.

AU - Annis, J.

AU - Benoit-Lévy, A.

AU - Bertin, E.

AU - Brooks, D.

AU - Buckley-Geer, E.

AU - Burke, D. L.

AU - Capozzi, D.

AU - Rosell, A. Carnero

AU - Kind, Carrasco

AU - Cunha, C. E.

AU - D'Andrea, C. B.

AU - da Costa, L. N.

AU - Desai, S.

AU - Diehl, H. T.

AU - Dietrich, J. P.

AU - Doel, P.

AU - Eifler, T. F.

AU - Estrada, J.

AU - Evrard, A. E.

AU - Flaugher, B.

AU - Frieman, J.

AU - Goldstein, D. A.

AU - Gruen, D.

AU - Gruendl, R. A.

AU - Gutierrez, G.

AU - Honscheid, K.

AU - Jain, B.

AU - James, D. J.

AU - Kuehn, K.

AU - Kuropatkin, N.

AU - Lahav, O.

AU - Li, T. S.

AU - Lima, M.

AU - Marshall, J. L.

AU - Martini, P.

AU - Melchior, P.

AU - Miller, C. J.

AU - Miquel, R.

AU - Mohr, J. J.

AU - Nichol, R. C.

AU - Nord, B.

AU - Ogando, R.

AU - Plazas, A. A.

AU - Reil, K.

AU - Romer, A. K.

AU - Roodman, A.

AU - Rykoff, E. S.

AU - Sanchez, E.

AU - Scarpine, V.

AU - Schubnell, M.

AU - Sevilla-Noarbe, I.

AU - Smith, R. C.

AU - Soares-Santos, M.

AU - Sobreira, F.

AU - Suchyta, E.

AU - Swanson, M. E.C.

AU - Tarle, G.

AU - Thomas, D.

AU - Walker, A. R.

PY - 2016/7/1

Y1 - 2016/7/1

N2 - We measure the redshift evolution of galaxy bias for a magnitude-limited galaxy sample by combining the galaxy density maps and weak lensing shear maps for a ~116 deg2 area of the Dark Energy Survey (DES) Science Verification (SV) data. This method was first developed in Amara et al. and later re-examined in a companion paper with rigorous simulation tests and analytical treatment of tomographic measurements. In this work we apply this method to the DES SV data and measure the galaxy bias for a i < 22.5 galaxy sample. We find the galaxy bias and 1σ error bars in four photometric redshift bins to be 1.12 ± 0.19 (z = 0.2-0.4), 0.97 ± 0.15 (z = 0.4-0.6), 1.38 ± 0.39 (z = 0.6-0.8), and 1.45 ± 0.56 (z = 0.8-1.0). These measurements are consistent at the 2σ level with measurements on the same data set using galaxy clustering and cross-correlation of galaxies with cosmic microwave background lensing, with most of the redshift bins consistent within the 1σ error bars. In addition, our method provides the only σ8 independent constraint among the three. We forward model the main observational effects using mock galaxy catalogues by including shape noise, photo-z errors, and masking effects. We show that our bias measurement from the data is consistent with that expected from simulations. With the forthcoming full DES data set, we expect this method to provide additional constraints on the galaxy bias measurement from more traditional methods. Furthermore, in the process of our measurement, we build up a 3D mass map that allows further exploration of the dark matter distribution and its relation to galaxy evolution.

AB - We measure the redshift evolution of galaxy bias for a magnitude-limited galaxy sample by combining the galaxy density maps and weak lensing shear maps for a ~116 deg2 area of the Dark Energy Survey (DES) Science Verification (SV) data. This method was first developed in Amara et al. and later re-examined in a companion paper with rigorous simulation tests and analytical treatment of tomographic measurements. In this work we apply this method to the DES SV data and measure the galaxy bias for a i < 22.5 galaxy sample. We find the galaxy bias and 1σ error bars in four photometric redshift bins to be 1.12 ± 0.19 (z = 0.2-0.4), 0.97 ± 0.15 (z = 0.4-0.6), 1.38 ± 0.39 (z = 0.6-0.8), and 1.45 ± 0.56 (z = 0.8-1.0). These measurements are consistent at the 2σ level with measurements on the same data set using galaxy clustering and cross-correlation of galaxies with cosmic microwave background lensing, with most of the redshift bins consistent within the 1σ error bars. In addition, our method provides the only σ8 independent constraint among the three. We forward model the main observational effects using mock galaxy catalogues by including shape noise, photo-z errors, and masking effects. We show that our bias measurement from the data is consistent with that expected from simulations. With the forthcoming full DES data set, we expect this method to provide additional constraints on the galaxy bias measurement from more traditional methods. Furthermore, in the process of our measurement, we build up a 3D mass map that allows further exploration of the dark matter distribution and its relation to galaxy evolution.

KW - Gravitational lensing: Weak

KW - Large-scale structure of Universe

KW - Surveys

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DO - 10.1093/mnras/stw861

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JF - Monthly Notices of the Royal Astronomical Society

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