Sarah Rugheimer
University of Oxford
PhysicsAstronomyAtmosphereStarsTerrestrial planetExoplanetHabitabilityUltravioletFlareBiosignatureEnvironmental scienceAstrophysicsSpectral lineSpectral energy distributionPlanetCircumstellar habitable zoneAstrobiologyEmission spectrum
Publications 86
#1Sascha P. Quanz (ETH Zurich)H-Index: 72
#2Olivier Absil (University of Liège)H-Index: 63
Last. Denis Defrere (Astrophysics Research Institute)H-Index: 40
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Exoplanet science is one of the most thriving fields of modern astrophysics. A major goal is the atmospheric characterization of dozens of small, terrestrial exoplanets in order to search for signatures in their atmospheres that indicate biological activity, assess their ability to provide conditions for life as we know it, and investigate their expected atmospheric diversity. None of the currently adopted projects or missions, from ground or in space, can address these goals. In this White Pape...
#1Paul B. RimmerH-Index: 28
#2Sukrit RanjanH-Index: 19
Last. Sarah RugheimerH-Index: 21
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The study of origins of life on Earth and the search for life on other planets are closely linked. Prebiotic chemical scenarios can help prioritize planets as targets for the search for life as we know it and can provide informative priors to help us assess the likelihood that particular spectroscopic features are evidence of life. The prerequisites for origins scenarios themselves predict spectral signatures. The interplay between origins research and the search for extraterrestrial life must s...
Abstract The COVID-19 pandemic has devastated individuals, families, and institutions throughout the world. Despite the breakneck speed of vaccine development, the human population remains at risk of further devastation. The decision to not become vaccinated, the protracted rollout of available vaccine, vaccine failure, mutational forms of the SARS virus, which may exhibit mounting resistance to our molecular strike at only one form of the viral family, and the rapid ability of the virus(es) to ...
#1Sarah Rugheimer (University of Oxford)H-Index: 21
The Hunt for Planet B, directed by Nathaniel Kahn, tells the story of the scientists searching for signs of extraterrestrial life and is organized around the building of the NASA-led James Webb Space Telescope (JWST), the high-powered Hubble successor scheduled to launch in late 2021. The film provides a behind-the-scenes view of the technical complexities, personalities, and politics that go into building a multidecade space mission.
Characterizing the atmospheres of planets orbiting M dwarfs requires understanding the spectral energy distributions of M dwarfs over planetary lifetimes. Surveys like MUSCLES, HAZMAT, and FUMES have collected multiwavelength spectra across the spectral type's range of Teff and activity, but the extreme ultraviolet flux (EUV, 100 to 912 Angstroms) of most of these stars remains unobserved because of obscuration by the interstellar medium compounded with limited detector sensitivity. While target...
A number of transiting, potentially habitable Earth-sized exoplanets have recently been detected around several nearby M dwarf stars. These worlds represent important targets for atmospheric characterization for the upcoming NASA James Webb Space Telescope. Given that available time for exoplanet characterization will be limited, it is critically important to first understand the capabilities and limitations of JWST when attempting to detect atmospheric constituents for potentially Earth-like wo...
#1Bethan Gregory (St And: University of St Andrews)H-Index: 1
#2Mark Claire (St And: University of St Andrews)H-Index: 34
Last. Sarah Rugheimer (University of Oxford)H-Index: 21
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Abstract Various proxies and numerical models have been used to constrain O2 levels over geological time, but considerable uncertainty remains. Previous investigations using 1-D photochemical models have predicted how O3 concentrations vary with assumed ground-level O2 concentrations, and indicate how the ozone layer might have developed over Earth history. These classic models have utilised the numerical simplification of fixed mixing ratio boundary conditions. Critically, this modelling assump...
We present a 5A-100um Spectral Energy Distribution (SED) of the ultracool dwarf star TRAPPIST-1, obtained as part of the Mega-MUSCLES Treasury Survey. The SED combines ultraviolet and blue-optical spectroscopy obtained with the Hubble Space Telescope, X-ray spectroscopy obtained with XMM-Newton, and models of the stellar photosphere, chromosphere, transition region and corona. A new Differential Emission Measure model of the unobserved extreme-ultraviolet spectrum is provided, improving on the L...
#1Sascha P. QuanzH-Index: 72
#2M. OttigerH-Index: 1
Last. E. AleiH-Index: 1
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One of the long-term goals of exoplanet science is the atmospheric characterization of dozens of small exoplanets in order to understand their diversity and search for habitable worlds and potential biosignatures. Achieving this goal requires a space mission of sufficient scale. We seek to quantify the exoplanet detection performance of a space-based mid-infrared nulling interferometer that measures the thermal emission of exoplanets. For this, we have developed an instrument simulator that cons...
#1Megan T. GiallucaH-Index: 1
#2Tyler D. RobinsonH-Index: 35
Last. Sarah RugheimerH-Index: 21
view all 3 authors...
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