Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2018 Feb 1;18(2):133–189. doi: 10.1089/ast.2016.1589

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© Victoria S. Meadows et al., 2018; Published by Mary Ann Liebert, Inc.

This Open Access article is distributed under the terms of the Creative Commons Attribution Noncommercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.

PMC Copyright notice

FIG. 17. — Transmission spectra of the 10 bar, 95% O₂ atmospheres with a surface water ocean (purple) and with complete desiccation (orange). The effective radius of the atmosphere (in km) is shown on the left y axis to emphasize the vertical extent of the absorption features, while the transit depth is shown on the right y axis to emphasize the strength and detectability of spectral features if Proxima Cen b were observed to transit. The contrasts in O₃ absorption stem from the extent to which O₃ remains abundant deep in the atmosphere, which is ultimately due to the presence or absence of water vapor.