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Title: Galaxy bias from galaxy–galaxy lensing in the DES science verification data

Abstract

Here, we present a measurement of galaxy–galaxy lensing around a magnitude-limited (i AB < 22.5) sample of galaxies from the dark energy survey science verification (DES-SV) data. We split these lenses into three photometric-redshift bins from 0.2 to 0.8, and determine the product of the galaxy bias b and cross-correlation coefficient between the galaxy and dark matter overdensity fields r in each bin, using scales above 4 h –1 Mpc comoving, where we find the linear bias model to be valid given our current uncertainties. We compare our galaxy bias results from galaxy–galaxy lensing with those obtained from galaxy clustering and CMB lensing for the same sample of galaxies, and find our measurements to be in good agreement with those in Crocce et al., while, in the lowest redshift bin (z ~ 0.3), they show some tension with the findings in Giannantonio et al. We measure b · r to be 0.87 ± 0.11, 1.12 ± 0.16 and 1.24 ± 0.23, respectively, for the three redshift bins of width Δz = 0.2 in the range 0.2 < z < 0.8, defined with the photometric-redshift algorithm bpz. Using a different code to split the lens sample, tpz, leads to changes inmore » the measured biases at the 10–20 per cent level, but it does not alter the main conclusion of this work: when comparing with Crocce et al. we do not find strong evidence for a cross-correlation parameter significantly below one in this galaxy sample, except possibly at the lowest redshift bin (z ~ 0.3), where we find r = 0.71 ± 0.11 when using tpz, and 0.83 ± 0.12 with bpz.« less

Authors:
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Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
Contributing Org.:
The DES Collaboration
OSTI Identifier:
1409251
Grant/Contract Number:
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Monthly Notices of the Royal Astronomical Society
Additional Journal Information:
Journal Volume: 473; Journal Issue: 2; Journal ID: ISSN 0035-8711
Publisher:
Royal Astronomical Society
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; gravitational lensing: weak; cosmology: observations; large-scale structure of Universe

Citation Formats

Prat, J., Sánchez, C., Miquel, R., Kwan, J., Blazek, J., Bonnett, C., Amara, A., Bridle, S. L., Clampitt, J., Crocce, M., Fosalba, P., Gaztanaga, E., Giannantonio, T., Hartley, W. G., Jarvis, M., MacCrann, N., Percival, W. J., Ross, A. J., Sheldon, E., Zuntz, J., Abbott, T. M. C., Abdalla, F. B., Annis, J., Benoit-Lévy, A., Bertin, E., Brooks, D., Burke, D. L., Carnero Rosell, A., Carrasco Kind, M., Carretero, J., Castander, F. J., da Costa, L. N., DePoy, D. L., Desai, S., Diehl, H. T., Doel, P., Eifler, T. F., Evrard, A. E., Fausti Neto, A., Flaugher, B., Frieman, J., Gerdes, D. W., Goldstein, D. A., Gruen, D., Gruendl, R. A., Gutierrez, G., Honscheid, K., James, D. J., Kuehn, K., Kuropatkin, N., Lahav, O., Lima, M., Marshall, J. L., Melchior, P., Menanteau, F., Nord, B., Plazas, A. A., Reil, K., Romer, A. K., Roodman, A., 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., and Walker, A. R. Galaxy bias from galaxy–galaxy lensing in the DES science verification data. United States: N. p., 2017. Web. doi:10.1093/mnras/stx2430.
Prat, J., Sánchez, C., Miquel, R., Kwan, J., Blazek, J., Bonnett, C., Amara, A., Bridle, S. L., Clampitt, J., Crocce, M., Fosalba, P., Gaztanaga, E., Giannantonio, T., Hartley, W. G., Jarvis, M., MacCrann, N., Percival, W. J., Ross, A. J., Sheldon, E., Zuntz, J., Abbott, T. M. C., Abdalla, F. B., Annis, J., Benoit-Lévy, A., Bertin, E., Brooks, D., Burke, D. L., Carnero Rosell, A., Carrasco Kind, M., Carretero, J., Castander, F. J., da Costa, L. N., DePoy, D. L., Desai, S., Diehl, H. T., Doel, P., Eifler, T. F., Evrard, A. E., Fausti Neto, A., Flaugher, B., Frieman, J., Gerdes, D. W., Goldstein, D. A., Gruen, D., Gruendl, R. A., Gutierrez, G., Honscheid, K., James, D. J., Kuehn, K., Kuropatkin, N., Lahav, O., Lima, M., Marshall, J. L., Melchior, P., Menanteau, F., Nord, B., Plazas, A. A., Reil, K., Romer, A. K., Roodman, A., 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 galaxy–galaxy lensing in the DES science verification data. United States. doi:10.1093/mnras/stx2430.
Prat, J., Sánchez, C., Miquel, R., Kwan, J., Blazek, J., Bonnett, C., Amara, A., Bridle, S. L., Clampitt, J., Crocce, M., Fosalba, P., Gaztanaga, E., Giannantonio, T., Hartley, W. G., Jarvis, M., MacCrann, N., Percival, W. J., Ross, A. J., Sheldon, E., Zuntz, J., Abbott, T. M. C., Abdalla, F. B., Annis, J., Benoit-Lévy, A., Bertin, E., Brooks, D., Burke, D. L., Carnero Rosell, A., Carrasco Kind, M., Carretero, J., Castander, F. J., da Costa, L. N., DePoy, D. L., Desai, S., Diehl, H. T., Doel, P., Eifler, T. F., Evrard, A. E., Fausti Neto, A., Flaugher, B., Frieman, J., Gerdes, D. W., Goldstein, D. A., Gruen, D., Gruendl, R. A., Gutierrez, G., Honscheid, K., James, D. J., Kuehn, K., Kuropatkin, N., Lahav, O., Lima, M., Marshall, J. L., Melchior, P., Menanteau, F., Nord, B., Plazas, A. A., Reil, K., Romer, A. K., Roodman, A., 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., and Walker, A. R. Mon . "Galaxy bias from galaxy–galaxy lensing in the DES science verification data". United States. doi:10.1093/mnras/stx2430.
@article{osti_1409251,
title = {Galaxy bias from galaxy–galaxy lensing in the DES science verification data},
author = {Prat, J. and Sánchez, C. and Miquel, R. and Kwan, J. and Blazek, J. and Bonnett, C. and Amara, A. and Bridle, S. L. and Clampitt, J. and Crocce, M. and Fosalba, P. and Gaztanaga, E. and Giannantonio, T. and Hartley, W. G. and Jarvis, M. and MacCrann, N. and Percival, W. J. and Ross, A. J. and Sheldon, E. and Zuntz, J. and Abbott, T. M. C. and Abdalla, F. B. and Annis, J. and Benoit-Lévy, A. and Bertin, E. and Brooks, D. and Burke, D. L. and Carnero Rosell, A. and Carrasco Kind, M. and Carretero, J. and Castander, F. J. and da Costa, L. N. and DePoy, D. L. and Desai, S. and Diehl, H. T. and Doel, P. and Eifler, T. F. and Evrard, A. E. and Fausti Neto, A. and Flaugher, B. and Frieman, J. and Gerdes, D. W. and Goldstein, D. A. and Gruen, D. and Gruendl, R. A. and Gutierrez, G. and Honscheid, K. and James, D. J. and Kuehn, K. and Kuropatkin, N. and Lahav, O. and Lima, M. and Marshall, J. L. and Melchior, P. and Menanteau, F. and Nord, B. and Plazas, A. A. and Reil, K. and Romer, A. K. and Roodman, A. and Sanchez, E. and Scarpine, V. and Schubnell, M. and Sevilla-Noarbe, I. and Smith, R. C. and Soares-Santos, M. and Sobreira, F. and Suchyta, E. and Swanson, M. E. C. and Tarle, G. and Thomas, D. and Walker, A. R.},
abstractNote = {Here, we present a measurement of galaxy–galaxy lensing around a magnitude-limited (iAB < 22.5) sample of galaxies from the dark energy survey science verification (DES-SV) data. We split these lenses into three photometric-redshift bins from 0.2 to 0.8, and determine the product of the galaxy bias b and cross-correlation coefficient between the galaxy and dark matter overdensity fields r in each bin, using scales above 4 h–1 Mpc comoving, where we find the linear bias model to be valid given our current uncertainties. We compare our galaxy bias results from galaxy–galaxy lensing with those obtained from galaxy clustering and CMB lensing for the same sample of galaxies, and find our measurements to be in good agreement with those in Crocce et al., while, in the lowest redshift bin (z ~ 0.3), they show some tension with the findings in Giannantonio et al. We measure b · r to be 0.87 ± 0.11, 1.12 ± 0.16 and 1.24 ± 0.23, respectively, for the three redshift bins of width Δz = 0.2 in the range 0.2 < z < 0.8, defined with the photometric-redshift algorithm bpz. Using a different code to split the lens sample, tpz, leads to changes in the measured biases at the 10–20 per cent level, but it does not alter the main conclusion of this work: when comparing with Crocce et al. we do not find strong evidence for a cross-correlation parameter significantly below one in this galaxy sample, except possibly at the lowest redshift bin (z ~ 0.3), where we find r = 0.71 ± 0.11 when using tpz, and 0.83 ± 0.12 with bpz.},
doi = {10.1093/mnras/stx2430},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 2,
volume = 473,
place = {United States},
year = {Mon Sep 25 00:00:00 EDT 2017},
month = {Mon Sep 25 00:00:00 EDT 2017}
}

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