Samantha Hasler

exorings-hci

Samantha Hasler, Alexandra Z. Greenbaum, G. Bryden, Vanessa P. Bailey et autres

A forward model for simulating the illumination, shadowing, and reflected-light phase curves of ringed exoplanets for high-contrast imaging observations.Described in Hasler et al. (in review).

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exorings-hci

Samantha Hasler, Alexandra Z. Greenbaum, G. Bryden, Vanessa P. Bailey et autres

A forward model for simulating the illumination, shadowing, and reflected-light phase curves of ringed exoplanets for high-contrast imaging observations.Described in Hasler et al. (in review).

us (code pays fourni par la source)

Leveraging photometry for deconfusion of directly imaged multiplanet systems

Samantha Hasler, Leonid Pogorelyuk, Riley M. Fitzgerald, Kerri Cahoy et autres

Future missions, including the Habitable Worlds Observatory, will aim to image Earth-like exoplanets around Sun-like stars in reflected light. Determining whether an exoplanet is in the habitable zone of its star may be difficult in multiplanet systems when the observer does not …

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Roman coronagraph simulations of exozodi observations in the presence of wavefront errors

Jorge Llop-Sayson, Vanessa P. Bailey, Justin Hom, John Krist et autres

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Roman coronagraph simulations of exozodi observations in the presence of wavefront errors

Jorge Llop-Sayson, Vanessa P. Bailey, Justin Hom, John Krist et autres

The Coronagraph Instrument on board of the Nancy Grace Roman Space Telescope will demonstrate key technologies that will prepare the ground for the Habitable Worlds Observatory. The current predictions for the Roman Coronagraph's detection limit range from 1e-8 to a few 1e-9, …

Analysis of convolutional neural networks and vision transformers in direct imaging for high-contrast exoplanet detection

Christine L. Page, Cheyenne D'Cruz, Susan F. Redmond, Saikrishna Manojkumar et autres

Direct imaging of exoplanets involves collecting photons emitted or reflected by a planet orbiting a host star. This approach is challenging due to the extreme brightness difference between exoplanets and their host stars as well as the small angular separation between a …

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Data Validation of the NASA Time-Resolved Observations of Precipitation Structure and Storm Intensity with a Constellation of Smallsats (TROPICS) Pathfinder Microwave Radiometer

Amelia Gagnon, Samantha Hasler, Juliana Chew, William C. Blackwell et autres

Launched in June 2021, the TROPICS Pathfinder CubeSat has a microwave radiometer payload sensitive to the frequencies for observing precipitation, humidity, temperature, and cloud ice. The observed brightness temperatures must be compared to a data set of ‘known’ quality to validate the …

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On-Orbit Results From the NASA Time-Resolved Observations of Precipitation Structure and Storm Intensity With a Constellation of Smallsats (TROPICS) Mission

William J. Blackwell, D. Crompton, Andrew Cunningham, S. Donnelly et autres

The NASA TROPICS Earth Venture (EVI-3) CubeSat constellation mission will provide nearly all-weather observations of 3-D temperature and humidity, as well as cloud ice and precipitation horizontal structure, at high temporal resolution to conduct high-value science investigations of tropical cyclones. TROPICS will …

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Update on NASA’s New Horizons Mission: Kuiper Belt Science Results and Future Plans

K. N. Singer, Alan J. Stern, Anne J. Verbiscer, Simon B. Porter et autres

NASA’s New Horizons spacecraft continues to explore the Kuiper belt after its historic close flybys of the Pluto system in 2015 at ~33 astronomical units (AU) [1] and the cold classical Kuiper belt object (KBO) Arrokoth in 2019 at ~43 AU [2]. …

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The NASA Time-Resolved Observations of Precipitation Structure and Storm Intensity with a Constellation of Smallsats (TROPICS) Mission: Results from the Pathfinder Demonstration and Look Ahead to the Constellation Mission

William J. Blackwell, D. Crompton, Andrew Cunningham, Shawn Donnelly et autres

The NASA Time-Resolved Observations of Precipitation structure and storm Intensity with a Constellation of Smallsats (TROPICS) mission will provide nearly all-weather observations of 3-D temperature and humidity, as well as cloud ice and precipitation horizontal structure, at high temporal resolution to conduct …

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JWST sighting of decametre main-belt asteroids and view on meteorite sources

Artem Burdanov, Julien de Wit, M. Brož, Thomas G. Muller et autres

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Observations of Uranus at High Phase Angle as Seen by New Horizons

Samantha Hasler, L. C. Mayorga, W. M. Grundy, Amy A. Simon et autres

Abstract We present flux measurements of Uranus observed at phase angles of 43.°9, 44.°0, and 52.°4 by the Multispectral Visible Imaging Camera on the New Horizons spacecraft during 2023, 2010, and 2019, respectively. New Horizons imaged Uranus at a distance of about …