Answer to Question #203219 in Astronomy | Astrophysics for Kila

Question

This problem requires you to read the following recently published scientific article:

Onset of Cosmic Reionization: Evidence of an Ionized Bubble Merely 680 Myr aer the Big Bang.

V. Tilvi et al 2020 ApJL 891 L10. Link: https://iopscience.iop.org/article/10.3847/2041-8213/ab75ec

Answer the following questions related to this article:

(a) What is the so called cosmic reionization process?

(b) What are Lyα lines and why did the researches want to observe them?

(c) What do the authors intend to point out with Figure 1 (see article)?

(d) How is confirmed that the peaks seen in Figure 3 are actually from Lyα emissions?

(e) How are the bubble sizes of the galaxies estimated?

(f) What is special about the findings in the article and what are the scientific implications?

Answer 1

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