English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We investigate Hawking radiation in the novel $4D$ Einstein-Gauss-Bonnetgravity which is recently formulated by Glavan and Lin [Phys. Rev. Lett. 124,081301 (2020)]. We first find the constraints on $\alpha$ and $\Lambda$ toretain a dS black hole in the spacetime. Both the greybody factor and the powerspectra of the Hawking radiation of the massless scalar are studied for thefull range of various parameters including the GB coupling constant $\alpha$,the cosmological constant $\Lambda$ and the constant related to the scalar$\xi$ numerically. In particular, we find the greybody factor is larger for anegative $\alpha$ than the case for $\alpha\ge0$. While, the power spectra ofthe Hawking radiation is higher for a allowed negative $\alpha$ than otherswith non-negative $\alpha$. The reason is that the temperature of the blackhole would be very high when $\alpha<0$, even when $\alpha$ approaches thelower bound, the temperature would be arbitrary high.

Greybody factor and power spectra of the Hawking radiation in the novel $4D$ Einstein-Gauss-Bonnet de-Sitter gravity