Year: 2026
Type: preprint
Abstract: We improve upon previous efforts to optimally combine overlapping galaxy samples in the DESI baryon acoustic oscillation analysis. By weighting each galaxy by its linear bias, overlapping galaxies are combined into a single, unified catalog, naturally avoiding double counting of cosmic volume and including all auto- and cross- information at the catalog level. Improvements over the previous effort include the addition of QSO out to $z=1.6$ to account for all overlapping DR2 tracers and redshift-dependent bias treatment to improve reconstruction. We report distance measurements using this unified tracer, and find them to be highly consistent with the baseline DR2 BAO analysis. We also test for tracer-dependent systematics within the DESI data, and find no evidence of tracer-dependent systematics within $0.8
Source: arXiv (Cornell University)
Authors: Sanders, N., Seo, H., Rashkovetskyi, M., Andrade, U., Valcin, D., Paillas, E., McDonald, P., Aguilar, J., Ahlen, S., Alves, O., Armengaud, E., Aviles, A., Beutler, F., Bianchi, D., Brooks, D., Rosell, A. Carnero, Chaussidon, E., Claybaugh, T., Cole, S., Cuceu, A., de la Macorra, A., Dey, Biprateep, Ding, Z., Doel, P., Ferraro, S., Font-Ribera, A., Forero-Sánchez, D., Forero-Romero, J. E., Gaztañaga, E., Gontcho, Satya Gontcho A, Gonzalez-Morales, A. X., Gutierrez, G., Hahn, C., Herrera-Alcantar, H. K., Honscheid, K., Juneau, S., Karim, T., Kirkby, D., Kremin, A., Lahav, O., Lamman, C., Landriau, M., Guillou, L. Le, Manera, M., Meisner, A., Miquel, R., Moustakas, J., Muñoz-Gutiérrez, A., Nadathur, S., Newman, J. A., Noriega, H. E., Palanque-Delabrouille, N., Percival, W. J., Prada, F., Pérez-Ràfols, I., Ravoux, C., Ross, A. J., Rossi, G., Samushia, L., Sanchez, E., Saulder, C., Schlegel, D., Schubnell, M., Silber, J., Siudek, M., Tarlé, G., Vargas-Magaña, M., Weaver, B. A.
Institutions: Ohio University, University of Michigan, University of California, Berkeley, University of Arizona, Universidad Diego Portales, Lawrence Berkeley National Laboratory, Boston University, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Université Paris-Saclay, CEA Paris-Saclay - Etablissement de Saclay, Institut de Recherche sur les Lois Fondamentales de l'Univers, Universidad Nacional Autónoma de México, Royal Observatory, University of Edinburgh, University of Milan, Brera Astronomical Observatory, University College London, Universidad de La Laguna, Instituto de Astrofísica de Canarias, Durham University, University of Pittsburgh, University of Toronto, University of Chinese Academy of Sciences, Institució Catalana de Recerca i Estudis Avançats, Universidad de Los Andes, Institute for High Energy Physics, Institut d'Estudis Espacials de Catalunya, Barcelona Institute of Science and Technology, Institut de Ciències del Cosmos, University of Virginia, University of Portsmouth, Universitat de Barcelona, NSF NOIRLab, University of California, Irvine, The Ohio State University, Universitat Autònoma de Barcelona, Instituto de Astrofísica de Andalucía, Universitat Politècnica de Catalunya, Centre National de la Recherche Scientifique, Université Clermont Auvergne, Laboratoire de Physique de Clermont Auvergne, Sejong University, Kansas State University, Evgeni Kharadze Georgian National Astrophysical Observatory, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, Max Planck Institute for Extraterrestrial Physics
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: National Science Foundation, U.S. Department of Energy, Gordon and Betty Moore Foundation, University of Michigan, Ministerio de Ciencia, Innovación y Universidades, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Office of Science, Science and Technology Facilities Council, Agencia Estatal de Investigación, Division of Astronomical Sciences, High Energy Physics
Awards: G1044631029, G1105844351, G1175115578, G1286236842, IMPROVING DARK ENERGY CONSTRAINTS USING LOW-REDSHIFT LARGE-SCALE STRUCTURES, G1813527838, G1863003419, G2062370958, G2262748287, G2314635793, G294895050, G300979063, G3083819904, G3452655474, G3480869486, G419881185, G425668148, G42916606, G4501827968, G491712853, G498139845, G5080475149, G5635532810, G593054264, G6174154091, G6253208238, G6652958823, G6876926712, G7084143925, Management and Operations of the National Optical Astronomy Observatory, G7395345766, G759921648, G7805626310, G7863371703, G8345352404, G8497050386, G8667377315, G969889393
OpenAlex ID: W7204802578