Buchumschlag

Probing the limits of cosmological information from the Lyman-$α$ forest 2-point correlation functions

Fuente: arXiv

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	Turner, Wynne, Cuceu, Andrei, Martini, Paul, Aguilar, J., Ahlen, S., Anand, A., Bianchi, D., Brooks, D., Casas, L., Claybaugh, T., de la Macorra, A., Dey, B., Doel, P., Ferraro, S., Font-Ribera, A., Forero-Romero, J. E., Gaztañaga, E., Gontcho, S. Gontcho A, Gutierrez, G., Herrera-Alcantar, H. K., Honscheid, K., Ishak, M., Joyce, R., Kehoe, R., Kirkby, D., Kremin, A., Lahav, O., Landriau, M., Guillou, L. Le, Manera, M., Miquel, R., Muñoz-Gutiérrez, A., Nadathur, S., Niz, G., Palanque-Delabrouille, N., Percival, W. J., Poppett, C., Prada, F., Ross, A. J., Rossi, G., Sanchez, E., Schlegel, D., Schubnell, M., Seo, H., Silber, J., Sprayberry, D., Tarlé, G., Walther, M., Weaver, B. A., Zhou, R., Zou, H.
Format:	Preprint
Veröffentlicht:	2025
Schlagworte:	Cosmology and Nongalactic Astrophysics
Online-Zugang:	Acceder al recurso
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

_version_	1866909012890484736
author	Turner, Wynne Cuceu, Andrei Martini, Paul Aguilar, J. Ahlen, S. Anand, A. Bianchi, D. Brooks, D. Casas, L. Claybaugh, T. de la Macorra, A. Dey, B. Doel, P. Ferraro, S. Font-Ribera, A. Forero-Romero, J. E. Gaztañaga, E. Gontcho, S. Gontcho A Gutierrez, G. Herrera-Alcantar, H. K. Honscheid, K. Ishak, M. Joyce, R. Kehoe, R. Kirkby, D. Kremin, A. Lahav, O. Landriau, M. Guillou, L. Le Manera, M. Miquel, R. Muñoz-Gutiérrez, A. Nadathur, S. Niz, G. Palanque-Delabrouille, N. Percival, W. J. Poppett, C. Prada, F. Ross, A. J. Rossi, G. Sanchez, E. Schlegel, D. Schubnell, M. Seo, H. Silber, J. Sprayberry, D. Tarlé, G. Walther, M. Weaver, B. A. Zhou, R. Zou, H.
author_facet	Turner, Wynne Cuceu, Andrei Martini, Paul Aguilar, J. Ahlen, S. Anand, A. Bianchi, D. Brooks, D. Casas, L. Claybaugh, T. de la Macorra, A. Dey, B. Doel, P. Ferraro, S. Font-Ribera, A. Forero-Romero, J. E. Gaztañaga, E. Gontcho, S. Gontcho A Gutierrez, G. Herrera-Alcantar, H. K. Honscheid, K. Ishak, M. Joyce, R. Kehoe, R. Kirkby, D. Kremin, A. Lahav, O. Landriau, M. Guillou, L. Le Manera, M. Miquel, R. Muñoz-Gutiérrez, A. Nadathur, S. Niz, G. Palanque-Delabrouille, N. Percival, W. J. Poppett, C. Prada, F. Ross, A. J. Rossi, G. Sanchez, E. Schlegel, D. Schubnell, M. Seo, H. Silber, J. Sprayberry, D. Tarlé, G. Walther, M. Weaver, B. A. Zhou, R. Zou, H.
contents	The standard cosmological analysis with the Ly$α$ forest relies on a continuum fitting procedure that suppresses information on large scales and distorts the three-dimensional correlation function on all scales. In this work, we present the first cosmological forecasts without continuum fitting distortion in the Ly$α$ forest, focusing on the recovery of large-scale information. Using idealized synthetic data, we compare the constraining power of the full shape of the Ly$α$ forest auto-correlation and its cross-correlation with quasars using the baseline continuum fitting analysis versus the true continuum. We find that knowledge of the true continuum enables a $\sim10\%$ reduction in uncertainties on the Alcock-Paczyński (AP) parameter and the matter density, $Ω_\mathrm{m}$. We also explore the impact of large-scale information by extending the analysis up to separations of $240\,h^{-1}\mathrm{Mpc}$ along and across the line of sight. The combination of these analysis choices can recover significant large-scale information, yielding up to a $\sim15\%$ improvement in AP constraints. This improvement is analogous to extending the Ly$α$ forest survey area by $\sim40\%$.
format	Preprint
id	arxiv_https___arxiv_org_abs_2509_14322
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Probing the limits of cosmological information from the Lyman-$α$ forest 2-point correlation functions Turner, Wynne Cuceu, Andrei Martini, Paul Aguilar, J. Ahlen, S. Anand, A. Bianchi, D. Brooks, D. Casas, L. Claybaugh, T. de la Macorra, A. Dey, B. Doel, P. Ferraro, S. Font-Ribera, A. Forero-Romero, J. E. Gaztañaga, E. Gontcho, S. Gontcho A Gutierrez, G. Herrera-Alcantar, H. K. Honscheid, K. Ishak, M. Joyce, R. Kehoe, R. Kirkby, D. Kremin, A. Lahav, O. Landriau, M. Guillou, L. Le Manera, M. Miquel, R. Muñoz-Gutiérrez, A. Nadathur, S. Niz, G. Palanque-Delabrouille, N. Percival, W. J. Poppett, C. Prada, F. Ross, A. J. Rossi, G. Sanchez, E. Schlegel, D. Schubnell, M. Seo, H. Silber, J. Sprayberry, D. Tarlé, G. Walther, M. Weaver, B. A. Zhou, R. Zou, H. Cosmology and Nongalactic Astrophysics The standard cosmological analysis with the Ly$α$ forest relies on a continuum fitting procedure that suppresses information on large scales and distorts the three-dimensional correlation function on all scales. In this work, we present the first cosmological forecasts without continuum fitting distortion in the Ly$α$ forest, focusing on the recovery of large-scale information. Using idealized synthetic data, we compare the constraining power of the full shape of the Ly$α$ forest auto-correlation and its cross-correlation with quasars using the baseline continuum fitting analysis versus the true continuum. We find that knowledge of the true continuum enables a $\sim10\%$ reduction in uncertainties on the Alcock-Paczyński (AP) parameter and the matter density, $Ω_\mathrm{m}$. We also explore the impact of large-scale information by extending the analysis up to separations of $240\,h^{-1}\mathrm{Mpc}$ along and across the line of sight. The combination of these analysis choices can recover significant large-scale information, yielding up to a $\sim15\%$ improvement in AP constraints. This improvement is analogous to extending the Ly$α$ forest survey area by $\sim40\%$.
title	Probing the limits of cosmological information from the Lyman-$α$ forest 2-point correlation functions
topic	Cosmology and Nongalactic Astrophysics
url	https://arxiv.org/abs/2509.14322