Search Results - "Meadows, Victoria"

Reflections on O 2 as a Biosignature in Exoplanetary Atmospheres by Meadows, Victoria S

“…Oxygenic photosynthesis is Earth's dominant metabolism, having evolved to harvest the largest expected energy source at the surface of most terrestrial…”
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Refining the Transit-timing and Photometric Analysis of TRAPPIST-1: Masses, Radii, Densities, Dynamics, and Ephemerides by Agol, Eric, Dorn, Caroline, Grimm, Simon L., Turbet, Martin, Ducrot, Elsa, Delrez, Laetitia, Gillon, Michaël, Demory, Brice-Olivier, Burdanov, Artem, Barkaoui, Khalid, Benkhaldoun, Zouhair, Bolmont, Emeline, Burgasser, Adam, Carey, Sean, Wit, Julien de, Fabrycky, Daniel, Foreman-Mackey, Daniel, Haldemann, Jonas, Hernandez, David M., Ingalls, James, Jehin, Emmanuel, Langford, Zachary, Leconte, Jérémy, Lederer, Susan M., Luger, Rodrigo, Malhotra, Renu, Meadows, Victoria S., Morris, Brett M., Pozuelos, Francisco J., Queloz, Didier, Raymond, Sean N., Selsis, Franck, Sestovic, Marko, Triaud, Amaury H. M. J., Grootel, Valerie Van

“…We have collected transit times for the TRAPPIST-1 system with the Spitzer Space Telescope over four years. We add to these ground-based, HST, and K2…”
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Modeling Repeated M Dwarf Flaring at an Earth-like Planet in the Habitable Zone: Atmospheric Effects for an Unmagnetized Planet by Tilley, Matt A, Segura, Antígona, Meadows, Victoria, Hawley, Suzanne, Davenport, James

“…Understanding the impact of active M dwarf stars on the atmospheric equilibrium and surface conditions of a habitable zone Earth-like planet is key to…”
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Evolved Climates and Observational Discriminants for the TRAPPIST-1 Planetary System by Lincowski, Andrew P., Meadows, Victoria S., Crisp, David, Robinson, Tyler D., Luger, Rodrigo, Lustig-Yaeger, Jacob, Arney, Giada N.

“…The TRAPPIST-1 planetary system provides an unprecedented opportunity to study terrestrial exoplanet evolution with the James Webb Space Telescope (JWST) and…”
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Pale Orange Dots: The Impact of Organic Haze on the Habitability and Detectability of Earthlike Exoplanets by Arney, Giada N., Meadows, Victoria S., Domagal-Goldman, Shawn D., Deming, Drake, Robinson, Tyler D., Tovar, Guadalupe, Wolf, Eric T., Schwieterman, Edward

“…Hazes are common in known planetary atmospheres, and geochemical evidence suggests that early Earth occasionally supported an organic haze with significant…”
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THE EFFECTS OF REFRACTION ON TRANSIT TRANSMISSION SPECTROSCOPY: APPLICATION TO EARTH-LIKE EXOPLANETS by Misra, Amit, Meadows, Victoria, Crisp, Dave

“…We quantify the effects of refraction in transit transmission spectroscopy on spectral absorption features and on temporal variations that could be used to…”
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The Pale Orange Dot: The Spectrum and Habitability of Hazy Archean Earth by Arney, Giada, Domagal-Goldman, Shawn D, Meadows, Victoria S, Wolf, Eric T, Schwieterman, Edward, Charnay, Benjamin, Claire, Mark, Hébrard, Eric, Trainer, Melissa G

“…Recognizing whether a planet can support life is a primary goal of future exoplanet spectral characterization missions, but past research on habitability…”
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The effect of a strong stellar flare on the atmospheric chemistry of an earth-like planet orbiting an M dwarf by Segura, Antígona, Walkowicz, Lucianne M, Meadows, Victoria, Kasting, James, Hawley, Suzanne

“…Main sequence M stars pose an interesting problem for astrobiology: their abundance in our galaxy makes them likely targets in the hunt for habitable planets,…”
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THE EVOLUTION OF SOLAR FLUX FROM 0.1 nm TO 160 μm: QUANTITATIVE ESTIMATES FOR PLANETARY STUDIES by CLAIRE, Mark W, SHEETS, John, COHEN, Martin, RIBAS, Ignasi, MEADOWS, Victoria S, CATLING, David C

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HAZMAT. V. The Ultraviolet and X-Ray Evolution of K Stars by Richey-Yowell, Tyler, Shkolnik, Evgenya L., Schneider, Adam C., Osby, Ella, Barman, Travis, Meadows, Victoria S.

“…Knowing the high-energy radiation environment of a star over a planet's formation and evolutionary period is critical in determining if that planet is…”
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Exoplanet Biosignatures: Understanding Oxygen as a Biosignature in the Context of Its Environment by Meadows, Victoria S, Reinhard, Christopher T, Arney, Giada N, Parenteau, Mary N, Schwieterman, Edward W, Domagal-Goldman, Shawn D, Lincowski, Andrew P, Stapelfeldt, Karl R, Rauer, Heike, DasSarma, Shiladitya, Hegde, Siddharth, Narita, Norio, Deitrick, Russell, Lustig-Yaeger, Jacob, Lyons, Timothy W, Siegler, Nicholas, Grenfell, J Lee

“…We describe how environmental context can help determine whether oxygen (O ) detected in extrasolar planetary observations is more likely to have a biological…”
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ABIOTIC OZONE AND OXYGEN IN ATMOSPHERES SIMILAR TO PREBIOTIC EARTH by DOMAGAL-GOLDMAN, SHAWN D, SEGURA, ANTIGONA, Claire, Mark W, Robinson, Tyler D, Meadows, Victoria S

“…The search for life on planets outside our solar system will use spectroscopic identification of atmospheric biosignatures. The most robust remotely detectable…”
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No thick carbon dioxide atmosphere on the rocky exoplanet TRAPPIST-1 c by Zieba, Sebastian, Kreidberg, Laura, Ducrot, Elsa, Gillon, Michaël, Morley, Caroline, Schaefer, Laura, Tamburo, Patrick, Koll, Daniel D. B., Lyu, Xintong, Acuña, Lorena, Agol, Eric, Iyer, Aishwarya R., Hu, Renyu, Lincowski, Andrew P., Meadows, Victoria S., Selsis, Franck, Bolmont, Emeline, Mandell, Avi M., Suissa, Gabrielle

“…Seven rocky planets orbit the nearby dwarf star TRAPPIST-1, providing a unique opportunity to search for atmospheres on small planets outside the Solar System…”
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THE INNER EDGE OF THE HABITABLE ZONE FOR SYNCHRONOUSLY ROTATING PLANETS AROUND LOW-MASS STARS USING GENERAL CIRCULATION MODELS by Kopparapu, Ravi kumar, Wolf, Eric T., Haqq-Misra, Jacob, Yang, Jun, Kasting, James F., Meadows, Victoria, Terrien, Ryan, Mahadevan, Suvrath

“…ABSTRACT Terrestrial planets at the inner edge of the habitable zone (HZ) of late-K and M-dwarf stars are expected to be in synchronous rotation, as a…”
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HAZMAT VI: The Evolution of Extreme Ultraviolet Radiation Emitted from Early M Stars by Peacock, Sarah, Barman, Travis, Shkolnik, Evgenya L., Loyd, R. O. Parke, Schneider, Adam C., Pagano, Isabella, Meadows, Victoria S.

“…Quantifying the evolution of stellar extreme ultraviolet (EUV, 100-1000 ) emission is critical for assessing the evolution of planetary atmospheres and the…”
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Organic Haze as a Biosignature in Anoxic Earth-like Atmospheres by Arney, Giada, Domagal-Goldman, Shawn D, Meadows, Victoria S

“…Early Earth may have hosted a biologically mediated global organic haze during the Archean eon (3.8-2.5 billion years ago). This haze would have significantly…”
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Mitigating Worst-case Exozodiacal Dust Structure in High-contrast Images of Earth-like Exoplanets by Currie, Miles H., Stark, Christopher C., Kammerer, Jens, Juanola-Parramon, Roser, Meadows, Victoria S.

“…Detecting Earth-like exoplanets in direct images of nearby Sun-like systems brings a unique set of challenges that must be addressed in the early phases of…”
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Interferon-β Plays a Detrimental Role in Experimental Traumatic Brain Injury by Enhancing Neuroinflammation That Drives Chronic Neurodegeneration by Barrett, James P, Henry, Rebecca J, Shirey, Kari Ann, Doran, Sarah J, Makarevich, Oleg D, Ritzel, Rodney M, Meadows, Victoria A, Vogel, Stefanie N, Faden, Alan I, Stoica, Bogdan A, Loane, David J

“…DNA damage and type I interferons (IFNs) contribute to inflammatory responses after traumatic brain injury (TBI). TBI-induced activation of microglia and…”
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Old age increases microglial senescence, exacerbates secondary neuroinflammation, and worsens neurological outcomes after acute traumatic brain injury in mice by Ritzel, Rodney M., Doran, Sarah J., Glaser, Ethan P., Meadows, Victoria E., Faden, Alan I., Stoica, Bogdan A., Loane, David J.

“…After traumatic brain injury (TBI), individuals aged over 65 years show increased mortality and worse functional outcomes compared with younger persons. As…”
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HAZMAT. IV. Flares and Superflares on Young M Stars in the Far Ultraviolet by Parke Loyd, R. O., Shkolnik, Evgenya L., Schneider, Adam C., Barman, Travis S., Meadows, Victoria S., Pagano, Isabella, Peacock, Sarah

“…Abstract M stars are powerful emitters of far-ultraviolet light. Over long timescales, a significant, possibly dominant, fraction of this emission is produced…”
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