### Abstract

The feasibility of the geometric test as a probe of the cosmic equation of state of the dark energy is discussed assuming the future Two Degree Field QSO sample. We examine the sensitivity of the QSO two-point correlation functions, which are theoretically computed incorporating the light cone effect and the redshift distortions, as well as the nonlinear effect, to a bias model whose evolution is phenomenologically parameterized. It is shown that the correlation functions are sensitive to a mean amplitude of the bias and not to the speed of the redshift evolution. We will also demonstrate that an optimistic geometric test could suffer from the possibility that a signal from the cosmological model can be confused with that from a stochastic character of the bias.

Original language | English |
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Pages (from-to) | L15-L19 |

Journal | Astrophysical Journal |

Volume | 549 |

Issue number | 1 PART 2 |

DOIs | |

Publication status | Published - Mar 1 2001 |

Externally published | Yes |

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### All Science Journal Classification (ASJC) codes

- Astronomy and Astrophysics
- Space and Planetary Science

### Cite this

*Astrophysical Journal*,

*549*(1 PART 2), L15-L19. https://doi.org/10.1086/319135