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

18.1k citations

Showing astro-ph.EPShow all

44 papers · 1 filter

astro-ph.EP2021★ 14 cited

Probing the icy shell structure of ocean worlds with gravity-topography admittance

Ryunosuke Akiba, Anton I. Ermakov, Burkhard Militzer

The structure of the icy shells of ocean worlds is important for understanding the stability of their underlying oceans as it controls the rate at which heat can be transported out…

astro-ph.EP2020★ 26 cited

On the Effect of Magnetospheric Shielding on the Lunar Hydrogen Cycle

Orenthal J. Tucker, William M. Farrell, Andrew R. Poppe

We examine how water is produced globally over the lunar surface as it orbits in/out of the magnetotail. Due to the interaction of the solar wind (SW) with Earth's magnetic field,…

astro-ph.EP2020★ 8 cited

Chondrules from high-velocity collisions: thermal histories and the agglomeration problem

Nick Choksi, Eugene Chiang, Harold C. Connolly +2

We assess whether chondrules, once-molten mm-sized spheres filling the oldest meteorites, could have formed from super-km/s collisions between planetesimals in the solar nebula. Hi…

astro-ph.EP2020★ 132 cited

Atmospheric Escape Processes and Planetary Atmospheric Evolution

Guillaume Gronoff, Phil Arras, Suleiman M Baraka +17

The habitability of the surface of any planet is determined by a complex evolution of its interior, surface, and atmosphere. The electromagnetic and particle radiation of stars dri…

astro-ph.EP2019★ 21 cited

O()+CO scattering cross sections at superthermal collision energies for planetary aeronomy

Marko Gacesa, Robert J. Lillis, Kevin J. Zahnle

We report new elastic and inelastic cross sections for O()+CO scattering at collision energies from 0.03 to 5 eV, of major importance to O escape from Mars, Venus, and CO$…

astro-ph.EP2019★ 34 cited

The surprisingly low carbon mass in the debris disk around HD 32297

Gianni Cataldi, Yanqin Wu, Alexis Brandeker +18

Gas has been detected in a number of debris disks. It is likely secondary, i.e. produced by colliding solids. Here, we report ALMA Band 8 observations of neutral carbon in the CO-r…

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…

astro-ph.EP2017★ 141 cited

The Breakthrough Listen Search for Intelligent Life: 1.1-1.9 GHz observations of 692 Nearby Stars

J. Emilio Enriquez, Andrew Siemion, Griffin Foster +10

We report on a search for engineered signals from a sample of 692 nearby stars using the Robert C. Byrd Green Bank Telescope, undertaken as part of the $Breakthrough~Listen~Initiat…

astro-ph.EP2017★ 19 cited

The Future of Stardust Science

A. J. Westphal, J. C. Bridges, D. E. Brownlee +13

Recent observations indicate that >99% of the small bodies in the Solar System reside in its outer reaches --- in the Kuiper Belt and Oort Cloud. Kuiper Belt bodies are probably th…

astro-ph.EP2016★ 35 cited

Planck intermediate results. LII. Planet flux densities

Planck Collaboration, Y. Akrami, M. Ashdown +147

Measurements of flux density are described for five planets, Mars, Jupiter, Saturn, Uranus, and Neptune, across the six Planck High Frequency Instrument frequency bands (100-857 GH…

astro-ph.EP2016★ 71 cited

Plutos interaction with its space environment: Solar Wind, Energetic Particles & Dust

F. Bagenal, M. Horányi, D. J. McComas +23

The New Horizons spacecraft carried three instruments that measured the space environment near Pluto as it flew by on 14 July 2015. The Solar Wind Around Pluto instrument revealed…

astro-ph.EP2016★ 107 cited

Transiting Exoplanet Studies and Community Targets for JWST's Early Release Science Program

Kevin B. Stevenson, Nikole K. Lewis, Jacob L. Bean +49

The James Webb Space Telescope will revolutionize transiting exoplanet atmospheric science due to its capability for continuous, long-duration observations and its larger collectin…

astro-ph.EP2015★ 113 cited

High-altitude gravity waves in the Martian thermosphere observed by MAVEN/NGIMS and modeled by a gravity wave scheme

Erdal Yiğit, Scott L. England, Guiping Liu +4

First high-altitude observations of gravity wave (GW)-induced CO density perturbations in the Martian thermosphere retrieved from NASA's NGIMS instrument on board the MAVEN sat…

astro-ph.EP2015★ 27 cited

Modeling Indications of Technology in Planetary Transit Light Curves -- Dark-side illumination

Eric J. Korpela, Shauna M. Sallmen, Diana Leystra Greene

We analyze potential effects of an extraterrestrial civilization's use of orbiting mirrors to illuminate the dark side of a synchronously rotating planet on planetary transit light…

astro-ph.EP2013★ 34 cited

EUV and X-Ray Observations of Comet Lovejoy (C/2011 W3) in the Lower Corona

Patrick I. McCauley, Steven H. Saar, John C. Raymond +2

We present an analysis of EUV and soft X-ray emission detected toward Comet Lovejoy (C/2011 W3) during its post-perihelion traverse of the solar corona on December 16, 2011. Observ…

astro-ph.EP2012★ 66 cited

The Discovery of HD 37605c and a Dispositive Null Detection of Transits of HD 37605b

Sharon Xuesong Wang, Jason T. Wright, William Cochran +15

We report the radial-velocity discovery of a second planetary mass companion to the K0 V star HD 37605, which was already known to host an eccentric, P~55 days Jovian planet, HD 37…

astro-ph.EP2012★ 49 cited

The HD 192263 system: planetary orbital period and stellar variability disentangled

Diana Dragomir, Stephen R. Kane, Gregory W. Henry +11

As part of the Transit Ephemeris Refinement and Monitoring Survey (TERMS), we present new radial velocities and photometry of the HD 192263 system. Our analysis of the already avai…

astro-ph.EP2012★ 30 cited

Non-detection of previously reported transits of HD 97658b with MOST photometry

Diana Dragomir, Jaymie M. Matthews, Andrew W. Howard +11

The radial velocity-discovered exoplanet HD 97658b was recently announced to transit, with a derived planetary radius of 2.93 \pm 0.28 R_{Earth}. As a transiting super-Earth orbiti…

astro-ph.EP2011★ 92 cited

Incorporation of a Late-forming Chondrule into Comet Wild 2

R. C. Ogliore, G. R. Huss, K. Nagashima +6

We report the petrology, O isotopic composition, and Al-Mg isotope systematics of a chondrule fragment from the Jupiter-family comet Wild 2, returned to Earth by NASA's Stardust mi…

astro-ph.EP2011★ 28 cited

The Allen Telescope Array Search for Electrostatic Discharges on Mars

Marin M. Anderson, Andrew P. V. Siemion, William C. Barott +4

The Allen Telescope Array was used to monitor Mars between 9 March and 2 June 2010, over a total of approximately 30 hours, for radio emission indicative of electrostatic discharge…