Výsledky vyhledávání - "Lewis, David P."

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Why heterogeneous cloud particles matter: Iron-bearing species and cloud particle morphology affects exoplanet transmission spectra

Autor: Kiefer, Sven, Samra, Dominic, Lewis, David A., Schneider, Aaron D., Min, Michiel, Carone, Ludmila, Decin, Leen, Helling, Christiane

Publikováno v: A&A 690, A244 (2024)

The possibility of observing spectral features in exoplanet atmospheres with space missions like JWST and ARIEL necessitates the accurate modelling of cloud particle opacities. In exoplanet atmospheres, cloud particles can be made from multiple mater

Externí odkaz: http://arxiv.org/abs/2409.01121

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Inhomogeneous terminators on the exoplanet WASP-39 b

Transmission spectroscopy has been a workhorse technique over the past two decades to constrain the physical and chemical properties of exoplanet atmospheres. One of its classical key assumptions is that the portion of the atmosphere it probes -- the

Externí odkaz: http://arxiv.org/abs/2407.10294

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Data availability and requirements relevant for the Ariel space mission and other exoplanet atmosphere applications

Autor: Chubb, Katy L., Robert, Séverine, Sousa-Silva, Clara, Yurchenko, Sergei N., Allard, Nicole F., Boudon, Vincent, Buldyreva, Jeanna, Bultel, Benjamin, Coustenis, Athena, Foltynowicz, Aleksandra, Gordon, Iouli E., Hargreaves, Robert J., Helling, Christiane, Hill, Christian, Hrodmarsson, Helgi Rafn, Karman, Tijs, Lecoq-Molinos, Helena, Migliorini, Alessandra, Rey, Michaël, Richard, Cyril, Sadiek, Ibrahim, Schmidt, Frédéric, Sokolov, Andrei, Stefani, Stefania, Tennyson, Jonathan, Venot, Olivia, Wright, Sam O. M., Arenales-Lope, Rosa, Barstow, Joanna K., Bocchieri, Andrea, Carrasco, Nathalie, Dubey, Dwaipayan, Egorov, Oleg, Muñoz, Antonio García, Ehsan, Gharib-Nezhad, Gkouvelis, Leonardos, Grübel, Fabian, Irwin, Patrick Gerard Joseph, Knížek, Antonín, Lewis, David A., Lodge, Matt G., Ma, Sushuang, Martins, Zita, Molaverdikhani, Karan, Morello, Giuseppe, Nikitin, Andrei, Panek, Emilie, Rengel, Miriam, Rinaldi, Giovanna, Skinner, Jack W., Tinetti, Giovanna, van Kempen, Tim A., Yang, Jingxuan, Zingales, Tiziano

The goal of this white paper is to provide a snapshot of the data availability and data needs primarily for the Ariel space mission, but also for related atmospheric studies of exoplanets and brown dwarfs. It covers the following data-related topics:

Externí odkaz: http://arxiv.org/abs/2404.02188

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Low-Frequency Radio Recombination Lines Away From the Inner Galactic Plane

Autor: Vydula, Akshatha K., Bowman, Judd D., Lewis, David, Crawford, Kelsie, Kolopanis, Matthew, Rogers, Alan E. E., Murray, Steven G., Mahesh, Nivedita, Monsalve, Raul A., Sims, Peter, Samson, Titu

Diffuse radio recombination lines (RRLs) in the Galaxy are possible foregrounds for redshifted 21~cm experiments. We use EDGES drift scans centered at $-26.7^o$~declination to characterize diffuse RRLs across the southern sky. We find RRLs averaged o

Externí odkaz: http://arxiv.org/abs/2302.14185

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WASP-39b: exo-Saturn with patchy cloud composition, moderate metallicity, and underdepleted S/O

Autor: Carone, Ludmila, Lewis, David A., Samra, Dominic, Schneider, Aaron D., Helling, Christiane

WASP-39b is one of the first extrasolar giant gas planets that has been observed within the JWST ERS program. Fundamental properties that may enable the link to exoplanet formation differ amongst retrieval methods, for example metallicity and mineral

Externí odkaz: http://arxiv.org/abs/2301.08492

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Improved Constraints on the 21 cm EoR Power Spectrum and the X-Ray Heating of the IGM with HERA Phase I Observations

Autor: The HERA Collaboration, Abdurashidova, Zara, Adams, Tyrone, Aguirre, James E., Alexander, Paul, Ali, Zaki S., Baartman, Rushelle, Balfour, Yanga, Barkana, Rennan, Beardsley, Adam P., Bernardi, Gianni, Billings, Tashalee S., Bowman, Judd D., Bradley, Richard F., Breitman, Daniela, Bull, Philip, Burba, Jacob, Carey, Steve, Carilli, Chris L., Cheng, Carina, Choudhuri, Samir, DeBoer, David R., Acedo, Eloy de Lera, Dexter, Matt, Dillon, Joshua S., Ely, John, Ewall-Wice, Aaron, Fagnoni, Nicolas, Fialkov, Anastasia, Fritz, Randall, Furlanetto, Steven R., Gale-Sides, Kingsley, Garsden, Hugh, Glendenning, Brian, Gorce, Adélie, Gorthi, Deepthi, Greig, Bradley, Grobbelaar, Jasper, Halday, Ziyaad, Hazelton, Bryna J., Heimersheim, Stefan, Hewitt, Jacqueline N., Hickish, Jack, Jacobs, Daniel C., Julius, Austin, Kern, Nicholas S., Kerrigan, Joshua, Kittiwisit, Piyanat, Kohn, Saul A., Kolopanis, Matthew, Lanman, Adam, La Plante, Paul, Lewis, David, Liu, Adrian, Loots, Anita, Ma, Yin-Zhe, MacMahon, David H. E., Malan, Lourence, Malgas, Keith, Malgas, Cresshim, Maree, Matthys, Marero, Bradley, Martinot, Zachary E., McBride, Lisa, Mesinger, Andrei, Mirocha, Jordan, Molewa, Mathakane, Morales, Miguel F., Mosiane, Tshegofalang, Muñoz, Julian B., Murray, Steven G., Nagpal, Vighnesh, Neben, Abraham R., Nikolic, Bojan, Nunhokee, Chuneeta D., Nuwegeld, Hans, Parsons, Aaron R., Pascua, Robert, Patra, Nipanjana, Pieterse, Samantha, Qin, Yuxiang, Razavi-Ghods, Nima, Robnett, James, Rosie, Kathryn, Santos, Mario G., Sims, Peter, Singh, Saurabh, Smith, Craig, Swarts, Hilton, Tan, Jianrong, Thyagarajan, Nithyanandan, Wilensky, Michael J., Williams, Peter K. G., van Wyngaarden, Pieter, Zheng, Haoxuan

Publikováno v: 2023 ApJ 945 124

We report the most sensitive upper limits to date on the 21 cm epoch of reionization power spectrum using 94 nights of observing with Phase I of the Hydrogen Epoch of Reionization Array (HERA). Using similar analysis techniques as in previously repor

Externí odkaz: http://arxiv.org/abs/2210.04912

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Exoplanet weather and climate regimes with clouds and thermal ionospheres: A model grid study in support of large-scale observational campaigns

Autor: Helling, Christiane, Samra, Dominic, Lewis, David, Calder, Robb, Hirst, Georgina, Woitke, Peter, Baeyens, Robin, Carone, Ludmila, Herbort, Oliver, Chubb, Katy L.

Publikováno v: A&A 671, A122 (2023)

With observational efforts moving from the discovery into the characterisation mode, systematic campaigns that cover large ranges of global stellar and planetary parameters will be needed. We aim to uncover cloud formation trends and globally changin

Externí odkaz: http://arxiv.org/abs/2208.05562

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