225 citations · 402 across the 17 of their papers we have counts for
17 papers
JWST MIRI reveals a potential atmosphere on the ultra-hot rocky planet TOI-431b
Cole Smith, Brandon Park Coy, Megan Weiner Mansfield +13
An open question in exoplanet science is whether rocky exoplanets extremely close in to their host stars, `lava worlds', can retain significant atmospheres. Thermal emission observ…
The dark and featureless surface of rocky exoplanet LHS 3844 b from JWST mid-infrared spectroscopy
Sebastian Zieba, Laura Kreidberg, Brandon P. Coy +13
JWST has opened a new era in the study of rocky exoplanets, enabling direct characterization of their surfaces with mid-infrared spectroscopy. Different types of rock have distinct…
Evidence for an Atmosphere on the Ultra-Short Period super-Earth HD 3167 b
Brandon Park Coy, Qiao Xue, Megan Weiner Mansfield +14
'Lava worlds'-Earth-sized planets hot enough (Teq >~ 1100 K) to melt their dayside silicate surfaces-have emerged as promising candidates for atmospheric detection and characteriza…
The JWST Rocky Worlds DDT Program reveals GJ 3929b to likely be a bare rock
Qiao Xue, Michael Zhang, Brandon P. Coy +14
We report first results from the JWST Rocky Worlds Director's Discretionary Time program. Two secondary eclipses of the terrestrial exoplanet GJ 3929b were recently observed using…
The Role of Tectonic Luck in Long-Term Habitability of Abiotic Earth-like Planets
Brandon Park Coy, Edwin S. Kite, R. J. Graham
Carbonate-silicate weathering feedback is thought to stabilize Earth's climate on geologic timescales. If climate warms, faster mineral dissolution and increased rainfall speed up…
The Cosmic Shoreline Revisited: A Metric for Atmospheric Retention Informed by Hydrodynamic Escape
Xuan Ji, Richard D. Chatterjee, Brandon Park Coy +1
The "cosmic shoreline," a semi-empirical relation that separates airless worlds from worlds with atmospheres as proposed by K. J. Zahnle & D. C. Catling, is now guiding large-scale…
Atmospheric dynamics of IR-active particles released from Mars' surface
Mark I. Richardson, Samaneh Ansari, Bowen Fan +7
Surface release of radiatively active particles, with high infrared- (IR-)to-visible extinction ratios, has been proposed as a method of warming Mars. However, to warm Mars using a…
A dark, bare rock for TOI-1685 b from a JWST NIRSpec G395H phase curve
Rafael Luque, Brandon Park Coy, Qiao Xue +9
We report JWST NIRSpec/G395H observations of TOI-1685 b, a hot rocky super-Earth orbiting an M2.5V star, during a full orbit. We obtain transmission and emission spectra of the pla…
Population-level Hypothesis Testing with Rocky Planet Emission Data: A Tentative Trend in the Brightness Temperatures of M-Earths
Brandon Park Coy, Jegug Ih, Edwin S. Kite +11
Determining which rocky exoplanets have atmospheres, and why, is a key goal for the James Webb Space Telescope. So far, emission observations of individual rocky exoplanets orbitin…
JWST Thermal Emission of the Terrestrial Exoplanet GJ 1132b
Qiao Xue, Jacob L. Bean, Michael Zhang +9
We present thermal emission measurements of GJ 1132b spanning 5--12 um obtained with the Mid-Infrared Instrument Low-Resolution Spectrometer (MIRI/LRS) on the James Webb Space Tele…
No Thick Atmosphere on the Terrestrial Exoplanet Gl 486b
Megan Weiner Mansfield, Qiao Xue, Michael Zhang +8
A primary science goal for JWST is to detect and characterize the atmospheres of terrestrial planets orbiting M dwarfs (M-Earths). The existence of atmospheres on M-Earths is highl…
An Earth-sized Planet on the Verge of Tidal Disruption
Fei Dai, Andrew W. Howard, Samuel Halverson +95
TOI-6255~b (GJ 4256) is an Earth-sized planet (1.079 ) with an orbital period of only 5.7 hours. With the newly commissioned Keck Planet Finder (KPF) and CARMEN…
Multiple overspill flood channels from young craters require surface melting and hundreds of meters of mid-latitude ice late in Mars history
Alexandra O. Warren, Sharon A. Wilson, Alan Howard +2
Mars' tadpole craters are small, young craters whose crater rims are incised by one or more exit breaches but lack visible inlets. The tadpole forming climate records the poorly un…
Effect of Mars Atmospheric Loss on Snow Melt Potential in a 3.5-Gyr Mars Climate Evolution Model
Megan Mansfield, Edwin S. Kite, Michael A. Mischna
Post-Noachian Martian paleochannels indicate the existence of liquid water on the surface of Mars after about 3.5 Gya (Irwin et al., 2015; Palucis et al., 2016). In order to explor…
Paleohydrology on Mars constrained by mass balance and mineralogy of pre-Amazonian sodium chloride lakes
Mohit Melwani Daswani, Edwin S. Kite
Chloride-bearing deposits on Mars record high-elevation lakes during the waning stages of Mars' wet era (mid-Noachian to late Hesperian). The water source pathways, seasonality, sa…
Persistent or repeated surface habitability on Mars during the Late Hesperian - Amazonian
Edwin S. Kite, Jonathan Sneed, David P. Mayer +1
Large alluvial fan deposits on Mars record relatively recent habitable surface conditions (3.5 Ga, Late Hesperian - Amazonian). We find net sedimentation rate <(4-8) μm/y…
Possible Disintegrating Short-Period Super-Mercury Orbiting KIC 12557548
S. Rappaport, A. Levine, E. Chiang +8
We report here on the discovery of stellar occultations, observed with Kepler, that recur periodically at 15.685 hour intervals, but which vary in depth from a maximum of 1.3% to a…