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Dark Energy Survey: DESI-Independent Angular BAO Measurement

Fuente: arXiv

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Detalles Bibliográficos
Autores principales:	Mena-Fernández, J., Avila, S., Porredon, A., Camacho, H., Muir, J., Sanchez, E., Adamow, M., Bechtol, K., Camilleri, R., Campailla, G., Davis, T. M., Deiosso, N., Doux, C., Drlica-Wagner, A., Ferté, A., Gruendl, R. A., Hartley, W. G., Pieres, A., Raveri, M., Rykoff, E. S., Sevilla-Noarbe, I., Shah, P., Sheldon, E., Vincenzi, M., Yanny, B., Abbott, T. M. C., Aguena, M., Allam, S., Alves, O., Andrade-Oliveira, F., Annis, J., Bacon, D., Blazek, J., Bocquet, S., Brooks, D., Rosell, A. Carnero, Carretero, J., Castander, F. J., Cawthon, R., da Costa, L. N., Pereira, M. E. da Silva, De Vicente, J., Desai, S., Diehl, H. T., Flaugher, B., Frieman, J., García-Bellido, J., Gatti, M., Gruen, D., Gutierrez, G., Herner, K., Hinton, S. R., Hollowood, D. L., Honscheid, K., Huterer, D., Jeffrey, N., Kuehn, K., Lahav, O., Lee, S., Marshall, J. L., Menanteau, F., Miquel, R., Mohr, J. J., Myles, J., Ogando, R. L. C., Palmese, A., Percival, W. J., Malagón, A. A. Plazas, Rodriguez-Monroy, M., Roodman, A., Samuroff, S., Cid, D. Sanchez, Sánchez, B. O., Shin, T., Smith, M., Soares-Santos, M., Suchyta, E., Swanson, M. E. C., Tucker, D. L., Vikram, V., Walker, A. R., Weaverdyck, N., Yamamoto, M.
Formato:	Preprint
Publicado:	2026
Materias:	Cosmology and Nongalactic Astrophysics
Acceso en línea:	Acceder al recurso
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

_version_	1866909996809191424
author	Mena-Fernández, J. Avila, S. Porredon, A. Camacho, H. Muir, J. Sanchez, E. Adamow, M. Bechtol, K. Camilleri, R. Campailla, G. Davis, T. M. Deiosso, N. Doux, C. Drlica-Wagner, A. Ferté, A. Gruendl, R. A. Hartley, W. G. Pieres, A. Raveri, M. Rykoff, E. S. Sevilla-Noarbe, I. Shah, P. Sheldon, E. Vincenzi, M. Yanny, B. Abbott, T. M. C. Aguena, M. Allam, S. Alves, O. Andrade-Oliveira, F. Annis, J. Bacon, D. Blazek, J. Bocquet, S. Brooks, D. Rosell, A. Carnero Carretero, J. Castander, F. J. Cawthon, R. da Costa, L. N. Pereira, M. E. da Silva De Vicente, J. Desai, S. Diehl, H. T. Flaugher, B. Frieman, J. García-Bellido, J. Gatti, M. Gruen, D. Gutierrez, G. Herner, K. Hinton, S. R. Hollowood, D. L. Honscheid, K. Huterer, D. Jeffrey, N. Kuehn, K. Lahav, O. Lee, S. Marshall, J. L. Menanteau, F. Miquel, R. Mohr, J. J. Myles, J. Ogando, R. L. C. Palmese, A. Percival, W. J. Malagón, A. A. Plazas Rodriguez-Monroy, M. Roodman, A. Samuroff, S. Cid, D. Sanchez Sánchez, B. O. Shin, T. Smith, M. Soares-Santos, M. Suchyta, E. Swanson, M. E. C. Tucker, D. L. Vikram, V. Walker, A. R. Weaverdyck, N. Yamamoto, M.
author_facet	Mena-Fernández, J. Avila, S. Porredon, A. Camacho, H. Muir, J. Sanchez, E. Adamow, M. Bechtol, K. Camilleri, R. Campailla, G. Davis, T. M. Deiosso, N. Doux, C. Drlica-Wagner, A. Ferté, A. Gruendl, R. A. Hartley, W. G. Pieres, A. Raveri, M. Rykoff, E. S. Sevilla-Noarbe, I. Shah, P. Sheldon, E. Vincenzi, M. Yanny, B. Abbott, T. M. C. Aguena, M. Allam, S. Alves, O. Andrade-Oliveira, F. Annis, J. Bacon, D. Blazek, J. Bocquet, S. Brooks, D. Rosell, A. Carnero Carretero, J. Castander, F. J. Cawthon, R. da Costa, L. N. Pereira, M. E. da Silva De Vicente, J. Desai, S. Diehl, H. T. Flaugher, B. Frieman, J. García-Bellido, J. Gatti, M. Gruen, D. Gutierrez, G. Herner, K. Hinton, S. R. Hollowood, D. L. Honscheid, K. Huterer, D. Jeffrey, N. Kuehn, K. Lahav, O. Lee, S. Marshall, J. L. Menanteau, F. Miquel, R. Mohr, J. J. Myles, J. Ogando, R. L. C. Palmese, A. Percival, W. J. Malagón, A. A. Plazas Rodriguez-Monroy, M. Roodman, A. Samuroff, S. Cid, D. Sanchez Sánchez, B. O. Shin, T. Smith, M. Soares-Santos, M. Suchyta, E. Swanson, M. E. C. Tucker, D. L. Vikram, V. Walker, A. R. Weaverdyck, N. Yamamoto, M.
contents	We present a measurement of the angular Baryon Acoustic Oscillation (BAO) scale from the completed Dark Energy Survey (DES) dataset excluding the area of overlap with the Dark Energy Spectroscopic Instrument (DESI). We follow the same methodology and validation process as in the DES Y6 BAO analysis. We interpret the impact of this measurement in the context of the statistical preference for $w_0w_a$CDM over $Λ$CDM when combined with DES Y5 Type Ia supernovae (SN), Planck Cosmic Microwave Background (CMB) and DESI BAO. Based on our previous work, using the full Y6 DES BAO sample, in combination with SN, CMB and DESI DR1 BAO, added 0.3$σ$ in this preference (from 3.7$σ$ to 4.0$σ$), but this ignored possible correlations between datasets. Using our new DESI-independent DES BAO likelihood instead, we find a smaller increase in the statistical preference for $w_0w_a$CDM, from 3.7$σ$ to 3.8$σ$ when using DESI DR1 BAO, and from 4.0$σ$ to 4.1$σ$ when updating to the more recent DESI DR2 BAO. These significances reduce to 3.1$σ$ when using the new calibrated DES SN-Dovekie. Alongside this work, we publicly release BAOfit_wtheta, the BAO fitting code for the angular correlation function used in the DES Y6 BAO analysis.
format	Preprint
id	arxiv_https___arxiv_org_abs_2601_14864
institution	arXiv
publishDate	2026
record_format	arxiv
spellingShingle	Dark Energy Survey: DESI-Independent Angular BAO Measurement Mena-Fernández, J. Avila, S. Porredon, A. Camacho, H. Muir, J. Sanchez, E. Adamow, M. Bechtol, K. Camilleri, R. Campailla, G. Davis, T. M. Deiosso, N. Doux, C. Drlica-Wagner, A. Ferté, A. Gruendl, R. A. Hartley, W. G. Pieres, A. Raveri, M. Rykoff, E. S. Sevilla-Noarbe, I. Shah, P. Sheldon, E. Vincenzi, M. Yanny, B. Abbott, T. M. C. Aguena, M. Allam, S. Alves, O. Andrade-Oliveira, F. Annis, J. Bacon, D. Blazek, J. Bocquet, S. Brooks, D. Rosell, A. Carnero Carretero, J. Castander, F. J. Cawthon, R. da Costa, L. N. Pereira, M. E. da Silva De Vicente, J. Desai, S. Diehl, H. T. Flaugher, B. Frieman, J. García-Bellido, J. Gatti, M. Gruen, D. Gutierrez, G. Herner, K. Hinton, S. R. Hollowood, D. L. Honscheid, K. Huterer, D. Jeffrey, N. Kuehn, K. Lahav, O. Lee, S. Marshall, J. L. Menanteau, F. Miquel, R. Mohr, J. J. Myles, J. Ogando, R. L. C. Palmese, A. Percival, W. J. Malagón, A. A. Plazas Rodriguez-Monroy, M. Roodman, A. Samuroff, S. Cid, D. Sanchez Sánchez, B. O. Shin, T. Smith, M. Soares-Santos, M. Suchyta, E. Swanson, M. E. C. Tucker, D. L. Vikram, V. Walker, A. R. Weaverdyck, N. Yamamoto, M. Cosmology and Nongalactic Astrophysics We present a measurement of the angular Baryon Acoustic Oscillation (BAO) scale from the completed Dark Energy Survey (DES) dataset excluding the area of overlap with the Dark Energy Spectroscopic Instrument (DESI). We follow the same methodology and validation process as in the DES Y6 BAO analysis. We interpret the impact of this measurement in the context of the statistical preference for $w_0w_a$CDM over $Λ$CDM when combined with DES Y5 Type Ia supernovae (SN), Planck Cosmic Microwave Background (CMB) and DESI BAO. Based on our previous work, using the full Y6 DES BAO sample, in combination with SN, CMB and DESI DR1 BAO, added 0.3$σ$ in this preference (from 3.7$σ$ to 4.0$σ$), but this ignored possible correlations between datasets. Using our new DESI-independent DES BAO likelihood instead, we find a smaller increase in the statistical preference for $w_0w_a$CDM, from 3.7$σ$ to 3.8$σ$ when using DESI DR1 BAO, and from 4.0$σ$ to 4.1$σ$ when updating to the more recent DESI DR2 BAO. These significances reduce to 3.1$σ$ when using the new calibrated DES SN-Dovekie. Alongside this work, we publicly release BAOfit_wtheta, the BAO fitting code for the angular correlation function used in the DES Y6 BAO analysis.
title	Dark Energy Survey: DESI-Independent Angular BAO Measurement
topic	Cosmology and Nongalactic Astrophysics
url	https://arxiv.org/abs/2601.14864