RELIABILITY OF THE DETECTION OF THE BARYON ACOUSTIC PEAK
- Observatori Astronomic, Universitat de Valencia, Apartat de Correus 22085, E-46071 Valencia (Spain)
- Tartu Observatory, EE-61602 Toravere (Estonia)
- Seccion Departamental de Matematica Aplicada, Escuela Universitaria de EstadIstica, Universidad Complutense de Madrid, Avda. Puerta de Hierro s/n, 28040 Madrid (Spain)
- Departamento de Matematica Aplicada y EstadIstica, Universidad Politecnica de Cartagena, C/ Dr. Fleming s/n, 30203 Cartagena (Spain)
- Instituto de Fisica de Cantabria (CSIC-UC) Edificio Juan Jorda, Av. de los Castros s/n, E-39005, Santander (Spain)
The correlation function of the distribution of matter in the universe shows, at large scales, baryon acoustic oscillations, which were imprinted prior to recombination. This feature was first detected in the correlation function of the luminous red galaxies of the Sloan Digital Sky Survey (SDSS). Recently, the final release (DR7) of the SDSS has been made available, and the useful volume is about two times bigger than in the old sample. We present here, for the first time, the redshift-space correlation function of this sample at large scales together with that for one shallower, but denser volume-limited subsample drawn from the Two-Degree Field Redshift Survey. We test the reliability of the detection of the acoustic peak at about 100 h {sup -1} Mpc and the behavior of the correlation function at larger scales by means of careful estimation of errors. We confirm the presence of the peak in the latest data although broader than in previous detections.
- OSTI ID:
- 21300738
- Journal Information:
- Astrophysical Journal (Online), Vol. 696, Issue 1; Other Information: DOI: 10.1088/0004-637X/696/1/L93; Country of input: International Atomic Energy Agency (IAEA); ISSN 1538-4357
- Country of Publication:
- United States
- Language:
- English
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