Weak lensing by galaxy troughs in DES science verification data

D. Gruen; O. Friedrich; A. Amara; D. Bacon; C. Bonnett; W. Hartley; B. Jain; M. Jarvis; T. Kacprzak; E. Krause; A. Mana; E. Rozo; E. S. Rykoff; S. Seitz; E. Sheldon; M. A. Troxel; V. Vikram; T. Abbott; F. B. Abdalla; S. Allam; R. Armstrong; M. Banerji; A. H. Bauer; M. R. Becker; A. Benoit-Levy; G. M. Bernstein; R. A. Bernstein; E. Bertin; S. L. Bridle; D. Brooks; E. Buckley-Geer; D. L. Burke; D. Capozzi; A. Carnero Rosell; M. Carrasco Kind; J. Carretero; M. Crocce; C. E. Cunha; C. B. D'Andrea; L. N. da Costa; D. L. DePoy; S. Desai; H. T. Diehl; J. P. Dietrich; P. Doel; T. F. Eifler; A. Fausti Neto; E. Fernandez; B. Flaugher; P. Fosalba; J. Frieman; D. W. Gerdes; R. A. Gruendl; G. Gutierrez; K. Honscheid; D. J. James; K. Kuehn; N. Kuropatkin; O. Lahav; T. S. Li; M. Lima; M. A. G. Maia; M. March; P. Martini; P. Melchior; C. J. Miller; R. Miquel; J. J. Mohr; B. Nord; R. Ogando; A. A. Plazas; K. Reil; A. K. Romer; A. Roodman; M. Sako; 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; J. Thaler; D. Thomas; A. R. Walker; R. H. Wechsler; J. Weller; Y. Zhang; J. Zuntz

doi:10.1093/mnras/stv2506

Weak lensing by galaxy troughs in DES science verification data

D. Gruen, O. Friedrich, A. Amara, D. Bacon, C. Bonnett, W. Hartley, B. Jain, M. Jarvis, T. Kacprzak, E. Krause, A. Mana, E. Rozo, E. S. Rykoff, S. Seitz, E. Sheldon, M. A. Troxel, V. Vikram, T. Abbott, F. B. Abdalla, S. AllamR. Armstrong, M. Banerji, A. H. Bauer, M. R. Becker, A. Benoit-Levy, G. M. Bernstein, R. A. Bernstein, E. Bertin, S. L. Bridle, D. Brooks, E. Buckley-Geer, D. L. Burke, D. Capozzi, A. Carnero Rosell, M. Carrasco Kind, J. Carretero, M. Crocce, C. E. Cunha, C. B. D'Andrea, L. N. da Costa, D. L. DePoy, S. Desai, H. T. Diehl, J. P. Dietrich, P. Doel, T. F. Eifler, A. Fausti Neto, E. Fernandez, B. Flaugher, P. Fosalba, J. Frieman, D. W. Gerdes, R. A. Gruendl, G. Gutierrez, K. Honscheid, D. J. James, K. Kuehn, N. Kuropatkin, O. Lahav, T. S. Li, M. Lima, M. A. G. Maia, M. March, P. Martini, P. Melchior, C. J. Miller, R. Miquel, J. J. Mohr, B. Nord, R. Ogando, A. A. Plazas, K. Reil, A. K. Romer, A. Roodman, M. Sako, 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, J. Thaler, D. Thomas, A. R. Walker, R. H. Wechsler, J. Weller, Y. Zhang, J. Zuntz

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Abstract

We measure the weak lensing shear around galaxy troughs, i.e. the radial alignment of background galaxies relative to underdensities in projections of the foreground galaxy field over a wide range of redshift in Science Verification data from the Dark Energy Survey. Our detection of the shear signal is highly significant (10 to 15$\sigma$ for the smallest angular scales) for troughs with the redshift range z in [0.2,0.5] of the projected galaxy field and angular diameters of 10 arcmin...1{\deg}. These measurements probe the connection between the galaxy, matter density, and convergence fields. By assuming galaxies are biased tracers of the matter density with Poissonian noise, we find agreement of our measurements with predictions in a fiducial Lambda cold dark matter model. The prediction for the lensing signal on large trough scales is virtually independent of the details of the underlying model for the connection of galaxies and matter. Our comparison of the shear around troughs with that around cylinders with large galaxy counts is consistent with a symmetry between galaxy and matter over- and underdensities. In addition, we measure the two-point angular correlation of troughs with galaxies which, in contrast to the lensing signal, is sensitive to galaxy bias on all scales. The lensing signal of troughs and their clustering with galaxies is therefore a promising probe of the statistical properties of matter underdensities and their connection to the galaxy field.

Original language	English
Pages (from-to)	3367-3380
Journal	Monthly Notices of the Royal Astronomical Society
Volume	455
Issue number	3
DOIs	https://doi.org/10.1093/mnras/stv2506
Publication status	Published - 21 Jan 2016

Keywords

astro-ph.CO
gravitational lensing: weak
cosmology: observations
RCUK
STFC

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10.1093/mnras/stv2506

Weak_lensing_by_galaxy_troughs
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
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Gruen, D., Friedrich, O., Amara, A., Bacon, D., Bonnett, C., Hartley, W., Jain, B., Jarvis, M., Kacprzak, T., Krause, E., Mana, A., Rozo, E., Rykoff, E. S., Seitz, S., Sheldon, E., Troxel, M. A., Vikram, V., Abbott, T., Abdalla, F. B., ... Zuntz, J. (2016). Weak lensing by galaxy troughs in DES science verification data. Monthly Notices of the Royal Astronomical Society, 455(3), 3367-3380. https://doi.org/10.1093/mnras/stv2506

@article{9b56ea8c0a2e4244a2c47fa7d8d53453,

title = "Weak lensing by galaxy troughs in DES science verification data",

abstract = "We measure the weak lensing shear around galaxy troughs, i.e. the radial alignment of background galaxies relative to underdensities in projections of the foreground galaxy field over a wide range of redshift in Science Verification data from the Dark Energy Survey. Our detection of the shear signal is highly significant (10 to 15$\sigma$ for the smallest angular scales) for troughs with the redshift range z in [0.2,0.5] of the projected galaxy field and angular diameters of 10 arcmin...1{\deg}. These measurements probe the connection between the galaxy, matter density, and convergence fields. By assuming galaxies are biased tracers of the matter density with Poissonian noise, we find agreement of our measurements with predictions in a fiducial Lambda cold dark matter model. The prediction for the lensing signal on large trough scales is virtually independent of the details of the underlying model for the connection of galaxies and matter. Our comparison of the shear around troughs with that around cylinders with large galaxy counts is consistent with a symmetry between galaxy and matter over- and underdensities. In addition, we measure the two-point angular correlation of troughs with galaxies which, in contrast to the lensing signal, is sensitive to galaxy bias on all scales. The lensing signal of troughs and their clustering with galaxies is therefore a promising probe of the statistical properties of matter underdensities and their connection to the galaxy field.",

keywords = "astro-ph.CO, gravitational lensing: weak, cosmology: observations, RCUK, STFC",

author = "D. Gruen and O. Friedrich and A. Amara and D. Bacon and C. Bonnett and W. Hartley and B. Jain and M. Jarvis and T. Kacprzak and E. Krause and A. Mana and E. Rozo and Rykoff, {E. S.} and S. Seitz and E. Sheldon and Troxel, {M. A.} and V. Vikram and T. Abbott and Abdalla, {F. B.} and S. Allam and R. Armstrong and M. Banerji and Bauer, {A. H.} and Becker, {M. R.} and A. Benoit-Levy and Bernstein, {G. M.} and Bernstein, {R. A.} and E. Bertin and Bridle, {S. L.} and D. Brooks and E. Buckley-Geer and Burke, {D. L.} and D. Capozzi and Rosell, {A. Carnero} and Kind, {M. Carrasco} and J. Carretero and M. Crocce and Cunha, {C. E.} and D'Andrea, {C. B.} and Costa, {L. N. da} and DePoy, {D. L.} and S. Desai and Diehl, {H. T.} and Dietrich, {J. P.} and P. Doel and Eifler, {T. F.} and Neto, {A. Fausti} and E. Fernandez and B. Flaugher and P. Fosalba and J. Frieman and Gerdes, {D. W.} and Gruendl, {R. A.} and G. Gutierrez and K. Honscheid and James, {D. J.} and K. Kuehn and N. Kuropatkin and O. Lahav and Li, {T. S.} and M. Lima and Maia, {M. A. G.} and M. March and P. Martini and P. Melchior and Miller, {C. J.} and R. Miquel and Mohr, {J. J.} and B. Nord and R. Ogando and Plazas, {A. A.} and K. Reil and Romer, {A. K.} and A. Roodman and M. Sako and E. Sanchez and V. Scarpine and M. Schubnell and I. Sevilla-Noarbe and Smith, {R. C.} and M. Soares-Santos and F. Sobreira and E. Suchyta and Swanson, {M. E. C.} and G. Tarle and J. Thaler and D. Thomas and Walker, {A. R.} and Wechsler, {R. H.} and J. Weller and Y. Zhang and J. Zuntz",

note = "15 pages, 8 figures; matches accepted version; high-resolution versions of figures can be downloaded from http://deswl.github.io Accepted - 26/10/2015 Published online - 29/11/2015",

year = "2016",

month = jan,

day = "21",

doi = "10.1093/mnras/stv2506",

language = "English",

volume = "455",

pages = "3367--3380",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "3",

}

Gruen, D, Friedrich, O, Amara, A, Bacon, D, Bonnett, C, Hartley, W, Jain, B, Jarvis, M, Kacprzak, T, Krause, E, Mana, A, Rozo, E, Rykoff, ES, Seitz, S, Sheldon, E, Troxel, MA, Vikram, V, Abbott, T, Abdalla, FB, Allam, S, Armstrong, R, Banerji, M, Bauer, AH, Becker, MR, Benoit-Levy, A, Bernstein, GM, Bernstein, RA, Bertin, E, Bridle, SL, Brooks, D, Buckley-Geer, E, Burke, DL, Capozzi, D, Rosell, AC, Kind, MC, Carretero, J, Crocce, M, Cunha, CE, D'Andrea, CB, Costa, LND, DePoy, DL, Desai, S, Diehl, HT, Dietrich, JP, Doel, P, Eifler, TF, Neto, AF, Fernandez, E, Flaugher, B, Fosalba, P, Frieman, J, Gerdes, DW, Gruendl, RA, Gutierrez, G, Honscheid, K, James, DJ, Kuehn, K, Kuropatkin, N, Lahav, O, Li, TS, Lima, M, Maia, MAG, March, M, Martini, P, Melchior, P, Miller, CJ, Miquel, R, Mohr, JJ, Nord, B, Ogando, R, Plazas, AA, Reil, K, Romer, AK, Roodman, A, Sako, M, Sanchez, E, Scarpine, V, Schubnell, M, Sevilla-Noarbe, I, Smith, RC, Soares-Santos, M, Sobreira, F, Suchyta, E, Swanson, MEC, Tarle, G, Thaler, J, Thomas, D, Walker, AR, Wechsler, RH, Weller, J, Zhang, Y & Zuntz, J 2016, 'Weak lensing by galaxy troughs in DES science verification data', Monthly Notices of the Royal Astronomical Society, vol. 455, no. 3, pp. 3367-3380. https://doi.org/10.1093/mnras/stv2506

TY - JOUR

T1 - Weak lensing by galaxy troughs in DES science verification data

AU - Gruen, D.

AU - Friedrich, O.

AU - Amara, A.

AU - Bacon, D.

AU - Bonnett, C.

AU - Hartley, W.

AU - Jain, B.

AU - Jarvis, M.

AU - Kacprzak, T.

AU - Krause, E.

AU - Mana, A.

AU - Rozo, E.

AU - Rykoff, E. S.

AU - Seitz, S.

AU - Sheldon, E.

AU - Troxel, M. A.

AU - Vikram, V.

AU - Abbott, T.

AU - Abdalla, F. B.

AU - Allam, S.

AU - Armstrong, R.

AU - Banerji, M.

AU - Bauer, A. H.

AU - Becker, M. R.

AU - Benoit-Levy, A.

AU - Bernstein, G. M.

AU - Bernstein, R. A.

AU - Bertin, E.

AU - Bridle, S. L.

AU - Brooks, D.

AU - Buckley-Geer, E.

AU - Burke, D. L.

AU - Capozzi, D.

AU - Rosell, A. Carnero

AU - Kind, M. Carrasco

AU - Carretero, J.

AU - Crocce, M.

AU - Cunha, C. E.

AU - D'Andrea, C. B.

AU - Costa, L. N. da

AU - DePoy, D. L.

AU - Desai, S.

AU - Diehl, H. T.

AU - Dietrich, J. P.

AU - Doel, P.

AU - Eifler, T. F.

AU - Neto, A. Fausti

AU - Fernandez, E.

AU - Flaugher, B.

AU - Fosalba, P.

AU - Frieman, J.

AU - Gerdes, D. W.

AU - Gruendl, R. A.

AU - Gutierrez, G.

AU - Honscheid, K.

AU - James, D. J.

AU - Kuehn, K.

AU - Kuropatkin, N.

AU - Lahav, O.

AU - Li, T. S.

AU - Lima, M.

AU - Maia, M. A. G.

AU - March, M.

AU - Martini, P.

AU - Melchior, P.

AU - Miller, C. J.

AU - Miquel, R.

AU - Mohr, J. J.

AU - Nord, B.

AU - Ogando, R.

AU - Plazas, A. A.

AU - Reil, K.

AU - Romer, A. K.

AU - Roodman, A.

AU - Sako, M.

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 - Thaler, J.

AU - Thomas, D.

AU - Walker, A. R.

AU - Wechsler, R. H.

AU - Weller, J.

AU - Zhang, Y.

AU - Zuntz, J.

N1 - 15 pages, 8 figures; matches accepted version; high-resolution versions of figures can be downloaded from http://deswl.github.io Accepted - 26/10/2015 Published online - 29/11/2015

PY - 2016/1/21

Y1 - 2016/1/21

N2 - We measure the weak lensing shear around galaxy troughs, i.e. the radial alignment of background galaxies relative to underdensities in projections of the foreground galaxy field over a wide range of redshift in Science Verification data from the Dark Energy Survey. Our detection of the shear signal is highly significant (10 to 15$\sigma$ for the smallest angular scales) for troughs with the redshift range z in [0.2,0.5] of the projected galaxy field and angular diameters of 10 arcmin...1{\deg}. These measurements probe the connection between the galaxy, matter density, and convergence fields. By assuming galaxies are biased tracers of the matter density with Poissonian noise, we find agreement of our measurements with predictions in a fiducial Lambda cold dark matter model. The prediction for the lensing signal on large trough scales is virtually independent of the details of the underlying model for the connection of galaxies and matter. Our comparison of the shear around troughs with that around cylinders with large galaxy counts is consistent with a symmetry between galaxy and matter over- and underdensities. In addition, we measure the two-point angular correlation of troughs with galaxies which, in contrast to the lensing signal, is sensitive to galaxy bias on all scales. The lensing signal of troughs and their clustering with galaxies is therefore a promising probe of the statistical properties of matter underdensities and their connection to the galaxy field.

AB - We measure the weak lensing shear around galaxy troughs, i.e. the radial alignment of background galaxies relative to underdensities in projections of the foreground galaxy field over a wide range of redshift in Science Verification data from the Dark Energy Survey. Our detection of the shear signal is highly significant (10 to 15$\sigma$ for the smallest angular scales) for troughs with the redshift range z in [0.2,0.5] of the projected galaxy field and angular diameters of 10 arcmin...1{\deg}. These measurements probe the connection between the galaxy, matter density, and convergence fields. By assuming galaxies are biased tracers of the matter density with Poissonian noise, we find agreement of our measurements with predictions in a fiducial Lambda cold dark matter model. The prediction for the lensing signal on large trough scales is virtually independent of the details of the underlying model for the connection of galaxies and matter. Our comparison of the shear around troughs with that around cylinders with large galaxy counts is consistent with a symmetry between galaxy and matter over- and underdensities. In addition, we measure the two-point angular correlation of troughs with galaxies which, in contrast to the lensing signal, is sensitive to galaxy bias on all scales. The lensing signal of troughs and their clustering with galaxies is therefore a promising probe of the statistical properties of matter underdensities and their connection to the galaxy field.

KW - astro-ph.CO

KW - gravitational lensing: weak

KW - cosmology: observations

KW - RCUK

KW - STFC

U2 - 10.1093/mnras/stv2506

DO - 10.1093/mnras/stv2506

M3 - Article

SN - 0035-8711

VL - 455

SP - 3367

EP - 3380

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

Weak lensing by galaxy troughs in DES science verification data

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