Model‐independent Multivariable Gamma‐Ray Burst Luminosity Indicator and Its Possible Cosmological Implications | Zendy

EnWei Liang | Zendy; Bing Zhang | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

Model‐independent Multivariable Gamma‐Ray Burst Luminosity Indicator and Its Possible Cosmological Implications

Author(s) -

EnWei Liang,

Bing Zhang

Publication year - 2005

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/491594

Subject(s) - gamma ray burst , afterglow , physics , astrophysics , redshift , luminosity , cosmic distance ladder , cosmology , observable , rest frame , isotropy , shape of the universe , universe , dark energy , galaxy , quantum mechanics

We present a multi-variable regression analysis to several observablequantities for a sample of 15 gamma-ray bursts (GRBs). The observables used inthe analysis includes the isotropic gamma-ray energy (E_{gamma,iso}), the peakenergy of the nu F_nu spectrum in the rest frame (E_p'), and the rest framebreak time of the optical afterglow light curves(t_b'). A strong dependence ofE_{gamma, iso on E_p' and t_b' is derived. We also extend the analysis to theisotropic afterglow energies in the X-ray and the optical bands, respectively,and find that they are essentially not correlated with E_p' and t_b'. Regardingthe E_{gamma, iso(E_p', t_b') relationship as a luminosity indicator, weexplore the possible constraints on the cosmological parameters using the GRBsample. Our results indicate 0.13

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research