Tracing the sound horizon scale with photometric redshift surveys
We propose a new method for the extraction cosmological parameters using the baryon acoustic oscillation (BAO) scale as a standard ruler in deep galaxy surveys with photometric determination of redshifts. The method consists in a simple empirical parametric fit to the angular two-point correlation f...
| Autori principali: | , , , , , , , , |
|---|---|
| Natura: | Journal article |
| Pubblicazione: |
Oxford University Press
2011
|
| _version_ | 1826280108676087808 |
|---|---|
| author | Sánchez, E Carnero, A García-Bellido, J Gaztañaga, E De Simoni, F Crocce, M Cabré, A Fosalba, P Alonso, D |
| author_facet | Sánchez, E Carnero, A García-Bellido, J Gaztañaga, E De Simoni, F Crocce, M Cabré, A Fosalba, P Alonso, D |
| author_sort | Sánchez, E |
| collection | OXFORD |
| description | We propose a new method for the extraction cosmological parameters using the baryon acoustic oscillation (BAO) scale as a standard ruler in deep galaxy surveys with photometric determination of redshifts. The method consists in a simple empirical parametric fit to the angular two-point correlation function ω(θ). It is parametrized as a power law to describe the continuum and as a Gaussian to describe the BAO bump. The location of the Gaussian is used as the basis for the measurement of the sound horizon scale. This method, although simple, actually provides a robust estimation, since the inclusion of the power law and the use of the Gaussian remove the shifts which affect the local maximum. We discuss the effects of projection bias, non-linearities, redshift space distortions and photo-z precision and apply our method to a mock catalogue of the Dark Energy Survey, built upon a large N-body simulation provided by the MICE collaboration. We discuss the main systematic errors associated with our method and show that they are dominated by the photo-z uncertainty. |
| first_indexed | 2024-03-07T00:08:46Z |
| format | Journal article |
| id | oxford-uuid:787be4dc-c5a8-4296-9c54-69fa5b6ae277 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T00:08:46Z |
| publishDate | 2011 |
| publisher | Oxford University Press |
| record_format | dspace |
| spelling | oxford-uuid:787be4dc-c5a8-4296-9c54-69fa5b6ae2772022-03-26T20:31:00ZTracing the sound horizon scale with photometric redshift surveysJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:787be4dc-c5a8-4296-9c54-69fa5b6ae277Symplectic Elements at OxfordOxford University Press2011Sánchez, ECarnero, AGarcía-Bellido, JGaztañaga, EDe Simoni, FCrocce, MCabré, AFosalba, PAlonso, DWe propose a new method for the extraction cosmological parameters using the baryon acoustic oscillation (BAO) scale as a standard ruler in deep galaxy surveys with photometric determination of redshifts. The method consists in a simple empirical parametric fit to the angular two-point correlation function ω(θ). It is parametrized as a power law to describe the continuum and as a Gaussian to describe the BAO bump. The location of the Gaussian is used as the basis for the measurement of the sound horizon scale. This method, although simple, actually provides a robust estimation, since the inclusion of the power law and the use of the Gaussian remove the shifts which affect the local maximum. We discuss the effects of projection bias, non-linearities, redshift space distortions and photo-z precision and apply our method to a mock catalogue of the Dark Energy Survey, built upon a large N-body simulation provided by the MICE collaboration. We discuss the main systematic errors associated with our method and show that they are dominated by the photo-z uncertainty. |
| spellingShingle | Sánchez, E Carnero, A García-Bellido, J Gaztañaga, E De Simoni, F Crocce, M Cabré, A Fosalba, P Alonso, D Tracing the sound horizon scale with photometric redshift surveys |
| title | Tracing the sound horizon scale with photometric redshift surveys |
| title_full | Tracing the sound horizon scale with photometric redshift surveys |
| title_fullStr | Tracing the sound horizon scale with photometric redshift surveys |
| title_full_unstemmed | Tracing the sound horizon scale with photometric redshift surveys |
| title_short | Tracing the sound horizon scale with photometric redshift surveys |
| title_sort | tracing the sound horizon scale with photometric redshift surveys |
| work_keys_str_mv | AT sancheze tracingthesoundhorizonscalewithphotometricredshiftsurveys AT carneroa tracingthesoundhorizonscalewithphotometricredshiftsurveys AT garciabellidoj tracingthesoundhorizonscalewithphotometricredshiftsurveys AT gaztanagae tracingthesoundhorizonscalewithphotometricredshiftsurveys AT desimonif tracingthesoundhorizonscalewithphotometricredshiftsurveys AT croccem tracingthesoundhorizonscalewithphotometricredshiftsurveys AT cabrea tracingthesoundhorizonscalewithphotometricredshiftsurveys AT fosalbap tracingthesoundhorizonscalewithphotometricredshiftsurveys AT alonsod tracingthesoundhorizonscalewithphotometricredshiftsurveys |