output
19922026
most citedMeasurements of Omega and Lambda from 42 High-Redshift Supernovae

18.1k citations

Showing 2018 · astro-ph.EPShow all

5 papers · 2 filters

astro-ph.EP2018★ 176 cited

Strange messenger: A new history of hydrogen on Earth, as told by Xenon

Kevin J. Zahnle, Marko Gacesa, David C. Catling

Atmospheric xenon is strongly mass fractionated, the result of a process that apparently continued through the Archean and perhaps beyond. Previous models that explain Xe fractiona…

astro-ph.EP2018★ 15 cited

Fine-grained Material Associated with a Large Sulfide returned from Comet 81P/Wild 2

Zack Gainsforth, Andrew J. Westphal, Anna L. Butterworth +10

In a consortium analysis of a large particle captured from the coma of comet 81P/Wild 2 by the Stardust spacecraft, we report the discovery of a field of fine-grained material (FGM…

astro-ph.EP2018★ 27 cited

Measurement of the Oxidation state of Fe in the ISM using X-ray Absorption Spectroscopy

Andrew J. Westphal, Anna L. Butterworth, John A. Tomsick +1

The oxidation state of iron in the interstellar medium (ISM) can provide constraints on the processes that operated on material in the protosolar disk. We used synchrotron-based X-…

astro-ph.EP2018★ 75 cited

Modeling Martian Atmospheric Losses over Time: Implications for Exoplanetary Climate Evolution and Habitability

Chuanfei Dong, Yuni Lee, Yingjuan Ma +11

In this Letter, we make use of sophisticated 3D numerical simulations to assess the extent of atmospheric ion and photochemical losses from Mars over time. We demonstrate that the…

astro-ph.EP2018★ 27 cited

Solar wind interaction with the Martian upper atmosphere: Roles of the cold thermosphere and hot oxygen corona

Chuanfei Dong, Stephen W. Bougher, Yingjuan Ma +10

We study roles of the thermosphere and exosphere on the Martian ionospheric structure and ion escape rates in the process of the solar wind-Mars interaction. We employ a four-speci…