Cosmic voids and void lensing in the Dark Energy Survey science verification data

doi:10.1093/mnras/stw2745

Title: Cosmic voids and void lensing in the Dark Energy Survey science verification data

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Abstract

Galaxies and their dark matter halos populate a complicated filamentary network around large, nearly empty regions known as cosmic voids. Cosmic voids are usually identified in spectroscopic galaxy surveys, where 3D information about the large-scale structure of the Universe is available. Although an increasing amount of photometric data is being produced, its potential for void studies is limited since photometric redshifts induce line-of-sight position errors of ~50 Mpc/h or more that can render many voids undetectable. In this paper we present a new void finder designed for photometric surveys, validate it using simulations, and apply it to the high-quality photo-z redMaGiC galaxy sample of the Dark Energy Survey Science Verification (DES-SV) data. The algorithm works by projecting galaxies into 2D slices and finding voids in the smoothed 2D galaxy density field of the slice. Fixing the line-of-sight size of the slices to be at least twice the photo- z scatter, the number of voids found in these projected slices of simulated spectroscopic and photometric galaxy catalogs is within 20% for all transverse void sizes, and indistinguishable for the largest voids of radius ~70 Mpc/h and larger. The positions, radii, and projected galaxy profiles of photometric voids also accurately match themore »« less

Authors:: Sánchez, C.; Clampitt, J.; Kovacs, A.; Jain, B.; García-Bellido, J.; Nadathur, S.; Gruen, D.; Hamaus, N.; Huterer, D.; Vielzeuf, P.; Amara, A.; Bonnett, C.; DeRose, J.; Hartley, W. G.; Jarvis, M.; Lahav, O.; Miquel, R.; Rozo, E.; Rykoff, E. S.; Sheldon, E. more »« less

Publication Date:: 2016-10-26

Research Org.:: Brookhaven National Laboratory (BNL), Upton, NY (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Contributing Org.:: The DES Collaboration

OSTI Identifier:: 1337861

Alternate Identifier(s):: OSTI ID: 1324275; OSTI ID: 1334785; OSTI ID: 1353173

Report Number(s):: BNL-112544-2016-JA; FERMILAB-PUB-16-173-AE; arXiv:1605.03982
Journal ID: ISSN 0035-8711; KA2301020

Grant/Contract Number:: SC0012704; AC02-07CH11359; SEV-2012-0234; AST-1138766; AYA2012-39559; ESP2013-48274; FPA2013-47986; 240672; 291329; 306478; PF5-160138; FP7/2007-2013; AC05-00OR22725; AC02-76SF00515

Resource Type:: Accepted Manuscript

Journal Name:: Monthly Notices of the Royal Astronomical Society

Additional Journal Information:: Journal Volume: 465; Journal Issue: 1; Journal ID: ISSN 0035-8711

Publisher:: Royal Astronomical Society

Country of Publication:: United States

Language:: English

Subject:: 79 ASTRONOMY AND ASTROPHYSICS; large-scale structure of Universe; cosmology: observations; gravitational lensing: weak

Citation Formats


                    Sánchez, C., Clampitt, J., Kovacs, A., Jain, B., García-Bellido, J., Nadathur, S., Gruen, D., Hamaus, N., Huterer, D., Vielzeuf, P., Amara, A., Bonnett, C., DeRose, J., Hartley, W. G., Jarvis, M., Lahav, O., Miquel, R., Rozo, E., Rykoff, E. S., Sheldon, E., Wechsler, R. H., Zuntz, J., Abbott, T. M.  C., Abdalla, F. B., Annis, J., Benoit-Lévy, A., Bernstein, G. M., Bernstein, R. A., Bertin, E., Brooks, D., Buckley-Geer, E., Rosell, A. Carnero, Kind, M. Carrasco, Carretero, J., Crocce, M., Cunha, C. E., D’Andrea, C. B., da Costa, L. N., Desai, S., Diehl, H. T., Dietrich, J. P., Doel, P., Evrard, A. E., Neto, A. Fausti, Flaugher, B., Fosalba, P., Frieman, J., Gaztanaga, E., Gruendl, R. A., Gutierrez, G., Honscheid, K., James, D. J., Krause, E., Kuehn, K., Lima, M., Maia, M. A.  G., Marshall, J. L., Melchior, P., Plazas, A. A., Reil, K., Romer, A. K., Sanchez, E., Schubnell, M., Sevilla-Noarbe, I., Smith, R. C., Soares-Santos, M., Sobreira, F., Suchyta, E., Tarle, G., Thomas, D., Walker, A. R., and Weller, J. Cosmic voids and void lensing in the Dark Energy Survey science verification data.  United States: N. p., 2016. 
        Web.  doi:10.1093/mnras/stw2745.

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                    Sánchez, C., Clampitt, J., Kovacs, A., Jain, B., García-Bellido, J., Nadathur, S., Gruen, D., Hamaus, N., Huterer, D., Vielzeuf, P., Amara, A., Bonnett, C., DeRose, J., Hartley, W. G., Jarvis, M., Lahav, O., Miquel, R., Rozo, E., Rykoff, E. S., Sheldon, E., Wechsler, R. H., Zuntz, J., Abbott, T. M.  C., Abdalla, F. B., Annis, J., Benoit-Lévy, A., Bernstein, G. M., Bernstein, R. A., Bertin, E., Brooks, D., Buckley-Geer, E., Rosell, A. Carnero, Kind, M. Carrasco, Carretero, J., Crocce, M., Cunha, C. E., D’Andrea, C. B., da Costa, L. N., Desai, S., Diehl, H. T., Dietrich, J. P., Doel, P., Evrard, A. E., Neto, A. Fausti, Flaugher, B., Fosalba, P., Frieman, J., Gaztanaga, E., Gruendl, R. A., Gutierrez, G., Honscheid, K., James, D. J., Krause, E., Kuehn, K., Lima, M., Maia, M. A.  G., Marshall, J. L., Melchior, P., Plazas, A. A., Reil, K., Romer, A. K., Sanchez, E., Schubnell, M., Sevilla-Noarbe, I., Smith, R. C., Soares-Santos, M., Sobreira, F., Suchyta, E., Tarle, G., Thomas, D., Walker, A. R., & Weller, J. Cosmic voids and void lensing in the Dark Energy Survey science verification data.  United States.  doi:10.1093/mnras/stw2745.

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                    Sánchez, C., Clampitt, J., Kovacs, A., Jain, B., García-Bellido, J., Nadathur, S., Gruen, D., Hamaus, N., Huterer, D., Vielzeuf, P., Amara, A., Bonnett, C., DeRose, J., Hartley, W. G., Jarvis, M., Lahav, O., Miquel, R., Rozo, E., Rykoff, E. S., Sheldon, E., Wechsler, R. H., Zuntz, J., Abbott, T. M.  C., Abdalla, F. B., Annis, J., Benoit-Lévy, A., Bernstein, G. M., Bernstein, R. A., Bertin, E., Brooks, D., Buckley-Geer, E., Rosell, A. Carnero, Kind, M. Carrasco, Carretero, J., Crocce, M., Cunha, C. E., D’Andrea, C. B., da Costa, L. N., Desai, S., Diehl, H. T., Dietrich, J. P., Doel, P., Evrard, A. E., Neto, A. Fausti, Flaugher, B., Fosalba, P., Frieman, J., Gaztanaga, E., Gruendl, R. A., Gutierrez, G., Honscheid, K., James, D. J., Krause, E., Kuehn, K., Lima, M., Maia, M. A.  G., Marshall, J. L., Melchior, P., Plazas, A. A., Reil, K., Romer, A. K., Sanchez, E., Schubnell, M., Sevilla-Noarbe, I., Smith, R. C., Soares-Santos, M., Sobreira, F., Suchyta, E., Tarle, G., Thomas, D., Walker, A. R., and Weller, J. Wed .  
        "Cosmic voids and void lensing in the Dark Energy Survey science verification data".  United States.  doi:10.1093/mnras/stw2745.  https://www.osti.gov/servlets/purl/1337861.

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@article{osti_1337861,

  title        = {Cosmic voids and void lensing in the Dark Energy Survey science verification data},

  author       = {Sánchez, C. and Clampitt, J. and Kovacs, A. and Jain, B. and García-Bellido, J. and Nadathur, S. and Gruen, D. and Hamaus, N. and Huterer, D. and Vielzeuf, P. and Amara, A. and Bonnett, C. and DeRose, J. and Hartley, W. G. and Jarvis, M. and Lahav, O. and Miquel, R. and Rozo, E. and Rykoff, E. S. and Sheldon, E. and Wechsler, R. H. and Zuntz, J. and Abbott, T. M.  C. and Abdalla, F. B. and Annis, J. and Benoit-Lévy, A. and Bernstein, G. M. and Bernstein, R. A. and Bertin, E. and Brooks, D. and Buckley-Geer, E. and Rosell, A. Carnero and Kind, M. Carrasco and Carretero, J. and Crocce, M. and Cunha, C. E. and D’Andrea, C. B. and da Costa, L. N. and Desai, S. and Diehl, H. T. and Dietrich, J. P. and Doel, P. and Evrard, A. E. and Neto, A. Fausti and Flaugher, B. and Fosalba, P. and Frieman, J. and Gaztanaga, E. and Gruendl, R. A. and Gutierrez, G. and Honscheid, K. and James, D. J. and Krause, E. and Kuehn, K. and Lima, M. and Maia, M. A.  G. and Marshall, J. L. and Melchior, P. and Plazas, A. A. and Reil, K. and Romer, A. K. and Sanchez, E. and Schubnell, M. and Sevilla-Noarbe, I. and Smith, R. C. and Soares-Santos, M. and Sobreira, F. and Suchyta, E. and Tarle, G. and Thomas, D. and Walker, A. R. and Weller, J.},

  abstractNote = {Galaxies and their dark matter halos populate a complicated filamentary network around large, nearly empty regions known as cosmic voids. Cosmic voids are usually identified in spectroscopic galaxy surveys, where 3D information about the large-scale structure of the Universe is available. Although an increasing amount of photometric data is being produced, its potential for void studies is limited since photometric redshifts induce line-of-sight position errors of ~50 Mpc/h or more that can render many voids undetectable. In this paper we present a new void finder designed for photometric surveys, validate it using simulations, and apply it to the high-quality photo-z redMaGiC galaxy sample of the Dark Energy Survey Science Verification (DES-SV) data. The algorithm works by projecting galaxies into 2D slices and finding voids in the smoothed 2D galaxy density field of the slice. Fixing the line-of-sight size of the slices to be at least twice the photo- z scatter, the number of voids found in these projected slices of simulated spectroscopic and photometric galaxy catalogs is within 20% for all transverse void sizes, and indistinguishable for the largest voids of radius ~70 Mpc/h and larger. The positions, radii, and projected galaxy profiles of photometric voids also accurately match the spectroscopic void sample. Applying the algorithm to the DES-SV data in the redshift range 0.2 < z < 0.8 , we identify 87 voids with comoving radii spanning the range 18-120 Mpc/h, and carry out a stacked weak lensing measurement. With a significance of 4.4σ, the lensing measurement confirms the voids are truly underdense in the matter field and hence not a product of Poisson noise, tracer density effects or systematics in the data. In conclusion, it also demonstrates, for the first time in real data, the viability of void lensing studies in photometric surveys.},

  doi          = {10.1093/mnras/stw2745},

  journal      = {Monthly Notices of the Royal Astronomical Society},

  number       = 1,

  volume       = 465,

  place        = {United States},

  year         = {2016},

  month        = {10}

}

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