2024-03-28T12:24:24Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1504002018-10-08T09:08:02Zcom_10261_97com_10261_4com_10261_49col_10261_350col_10261_175
Comparat, Johan
Chuang, C.H.
Rodríguez-Torres, S.
Pellejero-Ibanez, M.
Prada, Francisco
Yepes, G.
Sánchez del Río, Justo
Peiro-Perez, J.
Pérez Jiménez, Enrique
González Delgado, Rosa M.
2017-05-25T09:52:10Z
2017-05-25T09:52:10Z
2016
Monthly Notices of the Royal Astronomical Society 458: 2940- 2952 (2016)
http://hdl.handle.net/10261/150400
10.1093/mnras/stw326
http://dx.doi.org/10.13039/501100002367
http://dx.doi.org/10.13039/501100000780
http://dx.doi.org/10.13039/501100004837
http://dx.doi.org/10.13039/501100010198
The Baryon Acoustic Oscillation (BAO) feature in the power spectrum of galaxies provides a standard ruler to measure the accelerated expansion of the Universe. To extract all available information about dark energy, it is necessary to measure a standard ruler in the local, z < 0.2, universe where dark energy dominates most the energy density of the Universe. Though the volume available in the local universe is limited, it is just big enough to measure accurately the long 100 h Mpc wave-mode of the BAO. Using cosmological N-body simulations and approximate methods based on Lagrangian perturbation theory, we construct a suite of a thousand light-cones to evaluate the precision at which one can measure the BAO standard ruler in the local universe. We find that using the most massive galaxies on the full sky (34 000 deg), i.e. a K < 14 magnitude-limited sample, one can measure the BAO scale up to a precision of 4 per cent (~1.2 per cent using reconstruction). We also find that such a survey would help to detect the dynamics of dark energy. Therefore, we propose a 3-year long observational project, named the Low Redshift survey at Calar Alto, to observe spectroscopically about 200 000 galaxies in the northern sky to contribute to the construction of aforementioned galaxy sample. The suite of light-cones is made available to the public. © 2016 The Authors.
eng
http://dx.doi.org/10.1093/mnras/stw326
openAccess
Cosmology: observations
Galaxies: Abundances
Large-scale structure of Universe
The low redshift survey at calar alto (LoRCA)
artículo