Weighing neutrinos using high redshift galaxy luminosity functions

7th International Conference on Gravitation and Cosmology

Jose, C.^1 ; Samui, S.^2 ; Subramanian, K.^1 ; Srianand, R.^1

IUCAA, Pune University Campus, Post Bag 4, Ganeshkhind, Pune 411007, India^1

School of Physics, UKZN, Durban 4001, South Africa^2

关键词: Astronomical measurements;    High redshift-galaxies;    Hubble constant;    Luminosity functions;    Neutrino mass;    Wilkinson microwave anisotropy probe;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/484/1/012036/pdf
DOI  :  10.1088/1742-6596/484/1/012036

来源: IOP

【 摘 要 】

We have proposed a novel way to constrain the neutrino mass using UV luminosity function (LF) of high-z Lyman break galaxies. Combining the constraints from the Wilkinson Microwave Anisotropy Probe 7 year (WMAP-7) data with the LF data at z ∼ 4, we have got a limit on the sum of the masses of 3 degenerate neutrinos at the 95 % CL. The additional constraint of using the prior on Hubble constant strengthens this limit to at 95 % CL. As different astronomical measurements may suffer from different set of biases, the method presented here provides a complementary probe of sum of neutrino masses.