output
19962026
Showing 2020 · astro-ph.EPShow all

9 papers · 2 filters

astro-ph.EP2020★ 30 cited

On the Robustness of Phosphine Signatures in Venus' Clouds

Jane S. Greaves, William Bains, Janusz J. Petkowski +8

We published spectra of phosphine molecules in Venus' clouds, following open-science principles in releasing data and scripts (with community input leading to ALMA re-processing, n…

astro-ph.EP2020★ 37 cited

Re-analysis of Phosphine in Venus' Clouds

Jane S. Greaves, Anita M. S. Richards, William Bains +7

We first respond to two points raised by Villanueva et al. We show the JCMT discovery spectrum of PH3 can not be re-attributed to SO2, as the line width is larger than observed for…

astro-ph.EP2020

Seeing the Bigger Picture: The Rosetta Mission Amateur Observing Campaign and Lessons for the Future

Helen Usher, Colin Snodgrass, Simon F. Green +2

Amateur astronomers can make useful contributions to the study of comets. They add temporal coverage and multi-scale observations which can aid the study of fast-changing, and larg…

astro-ph.EP2020★ 58 cited

A stringent upper limit of the PH abundance at the cloud top of Venus

T. Encrenaz, T. K. Greathouse, E. Marcq +7

Following the announcement of the detection of phosphine (PH) in the cloud deck of Venus at millimeter wavelengths, we have searched for other possible signatures of this molec…

astro-ph.EP2020★ 268 cited

Phosphine Gas in the Cloud Decks of Venus

Jane S. Greaves, Anita M. S. Richards, William Bains +16

Measurements of trace-gases in planetary atmospheres help us explore chemical conditions different to those on Earth. Our nearest neighbor, Venus, has cloud decks that are temperat…

astro-ph.EP2020★ 109 cited

The Venusian Lower Atmosphere Haze as a Depot for Desiccated Microbial Life: A Proposed Life Cycle for Persistence of the Venusian Aerial Biosphere

Sara Seager, Janusz J. Petkowski, Peter Gao +4

We revisit the hypothesis that there is life in the Venusian clouds to propose a life cycle that resolves the conundrum of how life can persist aloft for hundreds of millions to bi…

astro-ph.EP2020★ 68 cited

Phosphine on Venus Cannot be Explained by Conventional Processes

William Bains, Janusz J. Petkowski, Sara Seager +6

The recent candidate detection of ~1 ppb of phosphine in the middle atmosphere of Venus is so unexpected that it requires an exhaustive search for explanations of its origin. Phosp…

astro-ph.EP2020★ 10 cited

Original Research By Young Twinkle Students (ORBYTS): Ephemeris Refinement of Transiting Exoplanets II

Billy Edwards, Lara Anisman, Quentin Changeat +60

We report follow-up observations of four transiting exoplanets, TRES-2b, HAT-P-22b, HAT-P-36b and XO-2b, as part of the Original Research By Young Twinkle Students (ORBYTS) program…

astro-ph.EP2020★ 28 cited

Dust Populations in the Iconic Vega Planetary System Resolved by ALMA

Luca Matrà, William R. F. Dent, David J. Wilner +9

The Vega planetary system hosts the archetype of extrasolar Kuiper belts, and is rich in dust from the sub-au region out to 100's of au, suggesting intense dynamical activity. We p…