The Phosphene Controversy: Is it Phosphene? Is there life on Venus?

TL;DR

The paper discusses the detection of phosphine in Venus's atmosphere, its potential as a biosignature, the controversy surrounding the findings, and the ongoing scientific debate about the possibility of life on Venus.

Contribution

It provides an analysis of the phosphine detection study, examines the controversy, and highlights the need for further observations to confirm potential biosignatures.

Findings

Detection of phosphine at 20 ppb in Venus's clouds

Controversy over the interpretation of spectral data

Calls for additional ground-based and space-based observations

Abstract

On 14th September 2020, the Royal Astronomical Society made an official statement coupled with a webminar on the discovery of phosphine on Venus. Single-line millimetre-waveband spectral detections of phosphine (with a signal-to-noise ratio of $\approx$ 15$\sigma$) from the JCMT and ALMA telescopes indicated a phosphine abundance of 20 ppb (parts per billion), 1000 times more than that on the Earth. Phosphine is an important biomarker and immediate speculation in the media about indicators of life being found on Venus followed. This article presents an analysis of the study and the results on the observation of the spectral absorption feature of phosphine in the clouds of Venus, thus implying as a potential biosignature. If phosphine is produced through biotic, as opposed to abiotic pathways, the discovery could imply a significant biomass in the Venusian atmosphere. The discovery led to a major controversy with criticism of the analysis and results and responses to it. The issue remains unresolved, leading to a fresh interest in the study of Venus including ground-based observations as well as space-probes that can answer these questions conclusively.