Dark Energy Survey Year 1 results: Measurement of the galaxy angular power spectrum

H. Camacho; N. Kokron; F. Andrade-Oliveira; R. Rosenfeld; M. Lima; F. Lacasa; F. Sobreira; L. N. Da Costa; S. Avila; K. C. Chan; M. Crocce; A. J. Ross; A. Troja; J. García-Bellido; T. M.C. Abbott; F. B. Abdalla; S. Allam; J. Annis; R. A. Bernstein; E. Bertin; S. L. Bridle; D. Brooks; E. Buckley-Geer; D. L. Burke; A. Carnero Rosell; M. Carrasco Kind; J. Carretero; F. J. Castander; R. Cawthon; C. E. Cunha; C. B. D'Andrea; J. De Vicente; S. Desai; H. T. Diehl; P. Doel; J. Estrada; A. E. Evrard; B. Flaugher; P. Fosalba; J. Frieman; D. W. Gerdes; T. Giannantonio; R. A. Gruendl; J. Gschwend; G. Gutierrez; D. L. Hollowood; K. Honscheid; B. Hoyle; D. J. James; M. W.G. Johnson; M. D. Johnson; S. Kent; D. Kirk; E. Krause; K. Kuehn; N. Kuropatkin; H. Lin; J. L. Marshall; R. Miquel; W. J. Percival; A. A. Plazas; A. K. Romer; A. Roodman; E. Sanchez; M. Schubnell; I. Sevilla-Noarbe; M. Smith; R. C. Smith; M. Soares-Santos; E. Suchyta; M. E.C. Swanson; G. Tarle; D. Thomas; D. L. Tucker; A. R. Walker; J. Zuntz

doi:10.1093/mnras/stz1514

Dark Energy Survey Year 1 results: Measurement of the galaxy angular power spectrum

H. Camacho, N. Kokron, F. Andrade-Oliveira, R. Rosenfeld, M. Lima, F. Lacasa, F. Sobreira, L. N. Da Costa, S. Avila, K. C. Chan, M. Crocce, A. J. Ross, A. Troja, J. García-Bellido, T. M.C. Abbott, F. B. Abdalla, S. Allam, J. Annis, R. A. Bernstein, E. BertinS. L. Bridle, D. Brooks, E. Buckley-Geer, D. L. Burke, A. Carnero Rosell, M. Carrasco Kind, J. Carretero, F. J. Castander, R. Cawthon, C. E. Cunha, C. B. D'Andrea, J. De Vicente, S. Desai, H. T. Diehl, P. Doel, J. Estrada, A. E. Evrard, B. Flaugher, P. Fosalba, J. Frieman, D. W. Gerdes, T. Giannantonio, R. A. Gruendl, J. Gschwend, G. Gutierrez, D. L. Hollowood, K. Honscheid, B. Hoyle, D. J. James, M. W.G. Johnson, M. D. Johnson, S. Kent, D. Kirk, E. Krause, K. Kuehn, N. Kuropatkin, H. Lin, J. L. Marshall, R. Miquel, W. J. Percival, A. A. Plazas, A. K. Romer, A. Roodman, E. Sanchez, M. Schubnell, I. Sevilla-Noarbe, M. Smith, R. C. Smith, M. Soares-Santos, E. Suchyta, M. E.C. Swanson, G. Tarle, D. Thomas, D. L. Tucker, A. R. Walker, J. Zuntz

Astronomy

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

We use data from the first-year observations of the DES collaboration to measure the galaxy angular power spectrum (APS), and search for its BAO feature. We test our methodology in a sample of 1800 DES Y1-like mock catalogues. We use the pseudo-C_l method to estimate the APS and the mock catalogues to estimate its covariance matrix. We use templates to model the measured spectra and estimate template parameters firstly from the C_l's of the mocks using two different methods, a maximum likelihood estimator and a Markov Chain Monte Carlo, finding consistent results with a good reduced χ². Robustness tests are performed to estimate the impact of different choices of settings used in our analysis. Finally, we apply our method to a galaxy sample constructed from DES Y1 data specifically for LSS studies. This catalogue comprises galaxies within an effective area of 1318 deg² and 0.6 < z < 1.0. We find that the DES Y1 data favour a model with BAO at the $2.6 σ C.L. However, the goodness of fit is somewhat poor, with χ²/(d.o.f.) = 1.49. We identify a possible cause showing that using a theoretical covariance matrix obtained from C_l's that are better adjusted to data results in an improved value of χ²/(dof) = 1.36 which is similar to the value obtained with the real-space analysis. Our results correspond to a distance measurement of D_A(z_eff = 0.81)/r_d = 10.65 ± 0.49, consistent with the main DES BAO findings. This is a companion paper to the main DES BAO article showing the details of the harmonic space analysis.

Original language	English (US)
Pages (from-to)	3870-3883
Number of pages	14
Journal	Monthly Notices of the Royal Astronomical Society
Volume	487
Issue number	3
DOIs	https://doi.org/10.1093/mnras/stz1514
State	Published - Aug 11 2019

Keywords

cosmology: observations
large-scale structure of Universe

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1093/mnras/stz1514

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Camacho, H., Kokron, N., Andrade-Oliveira, F., Rosenfeld, R., Lima, M., Lacasa, F., Sobreira, F., Da Costa, L. N., Avila, S., Chan, K. C., Crocce, M., Ross, A. J., Troja, A., García-Bellido, J., Abbott, T. M. C., Abdalla, F. B., Allam, S., Annis, J., Bernstein, R. A., ... Zuntz, J. (2019). Dark Energy Survey Year 1 results: Measurement of the galaxy angular power spectrum. Monthly Notices of the Royal Astronomical Society, 487(3), 3870-3883. https://doi.org/10.1093/mnras/stz1514

Camacho, H, Kokron, N, Andrade-Oliveira, F, Rosenfeld, R, Lima, M, Lacasa, F, Sobreira, F, Da Costa, LN, Avila, S, Chan, KC, Crocce, M, Ross, AJ, Troja, A, García-Bellido, J, Abbott, TMC, Abdalla, FB, Allam, S, Annis, J, Bernstein, RA, Bertin, E, Bridle, SL, Brooks, D, Buckley-Geer, E, Burke, DL, Carnero Rosell, A, Carrasco Kind, M, Carretero, J, Castander, FJ, Cawthon, R, Cunha, CE, D'Andrea, CB, De Vicente, J, Desai, S, Diehl, HT, Doel, P, Estrada, J, Evrard, AE, Flaugher, B, Fosalba, P, Frieman, J, Gerdes, DW, Giannantonio, T, Gruendl, RA, Gschwend, J, Gutierrez, G, Hollowood, DL, Honscheid, K, Hoyle, B, James, DJ, Johnson, MWG, Johnson, MD, Kent, S, Kirk, D, Krause, E, Kuehn, K, Kuropatkin, N, Lin, H, Marshall, JL, Miquel, R, Percival, WJ, Plazas, AA, Romer, AK, Roodman, A, Sanchez, E, Schubnell, M, Sevilla-Noarbe, I, Smith, M, Smith, RC, Soares-Santos, M, Suchyta, E, Swanson, MEC, Tarle, G, Thomas, D, Tucker, DL, Walker, AR & Zuntz, J 2019, 'Dark Energy Survey Year 1 results: Measurement of the galaxy angular power spectrum', Monthly Notices of the Royal Astronomical Society, vol. 487, no. 3, pp. 3870-3883. https://doi.org/10.1093/mnras/stz1514

@article{2d45c527c5444aa69e0c56db29fc605c,

title = "Dark Energy Survey Year 1 results: Measurement of the galaxy angular power spectrum",

abstract = "We use data from the first-year observations of the DES collaboration to measure the galaxy angular power spectrum (APS), and search for its BAO feature. We test our methodology in a sample of 1800 DES Y1-like mock catalogues. We use the pseudo-Cl method to estimate the APS and the mock catalogues to estimate its covariance matrix. We use templates to model the measured spectra and estimate template parameters firstly from the Cl's of the mocks using two different methods, a maximum likelihood estimator and a Markov Chain Monte Carlo, finding consistent results with a good reduced χ2. Robustness tests are performed to estimate the impact of different choices of settings used in our analysis. Finally, we apply our method to a galaxy sample constructed from DES Y1 data specifically for LSS studies. This catalogue comprises galaxies within an effective area of 1318 deg2 and 0.6 < z < 1.0. We find that the DES Y1 data favour a model with BAO at the $2.6 σ C.L. However, the goodness of fit is somewhat poor, with χ2/(d.o.f.) = 1.49. We identify a possible cause showing that using a theoretical covariance matrix obtained from Cl's that are better adjusted to data results in an improved value of χ2/(dof) = 1.36 which is similar to the value obtained with the real-space analysis. Our results correspond to a distance measurement of DA(zeff = 0.81)/rd = 10.65 ± 0.49, consistent with the main DES BAO findings. This is a companion paper to the main DES BAO article showing the details of the harmonic space analysis.",

keywords = "cosmology: observations, large-scale structure of Universe",

author = "H. Camacho and N. Kokron and F. Andrade-Oliveira and R. Rosenfeld and M. Lima and F. Lacasa and F. Sobreira and {Da Costa}, {L. N.} and S. Avila and Chan, {K. C.} and M. Crocce and Ross, {A. J.} and A. Troja and J. Garc{\'i}a-Bellido and Abbott, {T. M.C.} and Abdalla, {F. B.} and S. Allam and J. Annis and Bernstein, {R. A.} and E. Bertin and Bridle, {S. L.} and D. Brooks and E. Buckley-Geer and Burke, {D. L.} and {Carnero Rosell}, A. and {Carrasco Kind}, M. and J. Carretero and Castander, {F. J.} and R. Cawthon and Cunha, {C. E.} and D'Andrea, {C. B.} and {De Vicente}, J. and S. Desai and Diehl, {H. T.} and P. Doel and J. Estrada and Evrard, {A. E.} and B. Flaugher and P. Fosalba and J. Frieman and Gerdes, {D. W.} and T. Giannantonio and Gruendl, {R. A.} and J. Gschwend and G. Gutierrez and Hollowood, {D. L.} and K. Honscheid and B. Hoyle and James, {D. J.} and Johnson, {M. W.G.} and Johnson, {M. D.} and S. Kent and D. Kirk and E. Krause and K. Kuehn and N. Kuropatkin and H. Lin and Marshall, {J. L.} and R. Miquel and Percival, {W. J.} and Plazas, {A. A.} and Romer, {A. K.} and A. Roodman and E. Sanchez and M. Schubnell and I. Sevilla-Noarbe and M. Smith and Smith, {R. C.} and M. Soares-Santos and E. Suchyta and Swanson, {M. E.C.} and G. Tarle and D. Thomas and Tucker, {D. L.} and Walker, {A. R.} and J. Zuntz",

note = "Publisher Copyright: {\textcopyright} 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society.",

year = "2019",

month = aug,

day = "11",

doi = "10.1093/mnras/stz1514",

language = "English (US)",

volume = "487",

pages = "3870--3883",

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

issn = "0035-8711",

publisher = "Oxford University Press",

number = "3",

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TY - JOUR

T1 - Dark Energy Survey Year 1 results

T2 - Measurement of the galaxy angular power spectrum

AU - Camacho, H.

AU - Kokron, N.

AU - Andrade-Oliveira, F.

AU - Rosenfeld, R.

AU - Lima, M.

AU - Lacasa, F.

AU - Sobreira, F.

AU - Da Costa, L. N.

AU - Avila, S.

AU - Chan, K. C.

AU - Crocce, M.

AU - Ross, A. J.

AU - Troja, A.

AU - García-Bellido, J.

AU - Abbott, T. M.C.

AU - Abdalla, F. B.

AU - Allam, S.

AU - Annis, J.

AU - Bernstein, R. A.

AU - Bertin, E.

AU - Bridle, S. L.

AU - Brooks, D.

AU - Buckley-Geer, E.

AU - Burke, D. L.

AU - Carnero Rosell, A.

AU - Carrasco Kind, M.

AU - Carretero, J.

AU - Castander, F. J.

AU - Cawthon, R.

AU - Cunha, C. E.

AU - D'Andrea, C. B.

AU - De Vicente, J.

AU - Desai, S.

AU - Diehl, H. T.

AU - Doel, P.

AU - Estrada, J.

AU - Evrard, A. E.

AU - Flaugher, B.

AU - Fosalba, P.

AU - Frieman, J.

AU - Gerdes, D. W.

AU - Giannantonio, T.

AU - Gruendl, R. A.

AU - Gschwend, J.

AU - Gutierrez, G.

AU - Hollowood, D. L.

AU - Honscheid, K.

AU - Hoyle, B.

AU - James, D. J.

AU - Johnson, M. W.G.

AU - Johnson, M. D.

AU - Kent, S.

AU - Kirk, D.

AU - Krause, E.

AU - Kuehn, K.

AU - Kuropatkin, N.

AU - Lin, H.

AU - Marshall, J. L.

AU - Miquel, R.

AU - Percival, W. J.

AU - Plazas, A. A.

AU - Romer, A. K.

AU - Roodman, A.

AU - Sanchez, E.

AU - Schubnell, M.

AU - Sevilla-Noarbe, I.

AU - Smith, M.

AU - Smith, R. C.

AU - Soares-Santos, M.

AU - Suchyta, E.

AU - Swanson, M. E.C.

AU - Tarle, G.

AU - Thomas, D.

AU - Tucker, D. L.

AU - Walker, A. R.

AU - Zuntz, J.

PY - 2019/8/11

Y1 - 2019/8/11

N2 - We use data from the first-year observations of the DES collaboration to measure the galaxy angular power spectrum (APS), and search for its BAO feature. We test our methodology in a sample of 1800 DES Y1-like mock catalogues. We use the pseudo-Cl method to estimate the APS and the mock catalogues to estimate its covariance matrix. We use templates to model the measured spectra and estimate template parameters firstly from the Cl's of the mocks using two different methods, a maximum likelihood estimator and a Markov Chain Monte Carlo, finding consistent results with a good reduced χ2. Robustness tests are performed to estimate the impact of different choices of settings used in our analysis. Finally, we apply our method to a galaxy sample constructed from DES Y1 data specifically for LSS studies. This catalogue comprises galaxies within an effective area of 1318 deg2 and 0.6 < z < 1.0. We find that the DES Y1 data favour a model with BAO at the $2.6 σ C.L. However, the goodness of fit is somewhat poor, with χ2/(d.o.f.) = 1.49. We identify a possible cause showing that using a theoretical covariance matrix obtained from Cl's that are better adjusted to data results in an improved value of χ2/(dof) = 1.36 which is similar to the value obtained with the real-space analysis. Our results correspond to a distance measurement of DA(zeff = 0.81)/rd = 10.65 ± 0.49, consistent with the main DES BAO findings. This is a companion paper to the main DES BAO article showing the details of the harmonic space analysis.

AB - We use data from the first-year observations of the DES collaboration to measure the galaxy angular power spectrum (APS), and search for its BAO feature. We test our methodology in a sample of 1800 DES Y1-like mock catalogues. We use the pseudo-Cl method to estimate the APS and the mock catalogues to estimate its covariance matrix. We use templates to model the measured spectra and estimate template parameters firstly from the Cl's of the mocks using two different methods, a maximum likelihood estimator and a Markov Chain Monte Carlo, finding consistent results with a good reduced χ2. Robustness tests are performed to estimate the impact of different choices of settings used in our analysis. Finally, we apply our method to a galaxy sample constructed from DES Y1 data specifically for LSS studies. This catalogue comprises galaxies within an effective area of 1318 deg2 and 0.6 < z < 1.0. We find that the DES Y1 data favour a model with BAO at the $2.6 σ C.L. However, the goodness of fit is somewhat poor, with χ2/(d.o.f.) = 1.49. We identify a possible cause showing that using a theoretical covariance matrix obtained from Cl's that are better adjusted to data results in an improved value of χ2/(dof) = 1.36 which is similar to the value obtained with the real-space analysis. Our results correspond to a distance measurement of DA(zeff = 0.81)/rd = 10.65 ± 0.49, consistent with the main DES BAO findings. This is a companion paper to the main DES BAO article showing the details of the harmonic space analysis.

KW - cosmology: observations

KW - large-scale structure of Universe

UR - http://www.scopus.com/inward/record.url?scp=85072252876&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85072252876&partnerID=8YFLogxK

U2 - 10.1093/mnras/stz1514

DO - 10.1093/mnras/stz1514

M3 - Article

AN - SCOPUS:85072252876

SN - 0035-8711

VL - 487

SP - 3870

EP - 3883

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

Dark Energy Survey Year 1 results: Measurement of the galaxy angular power spectrum

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