Zobrazeno 1 - 10
of 829
pro vyhledávání: '"Macdonald, Ryan"'
Autor:
Louie, Dana R., Mullens, Elijah, Alderson, Lili, Glidden, Ana, Lewis, Nikole K., Wakeford, Hannah R., Batalha, Natasha E., Colón, Knicole D., Gressier, Amélie, Long, Douglas, Radica, Michael, Espinoza, Néstor, Goyal, Jayesh, MacDonald, Ryan J., May, Erin M., Seager, Sara, Stevenson, Kevin B., Valenti, Jeff A., Allen, Natalie H., Cañas, Caleb I., Challener, Ryan C., Grant, David, Huang, Jingcheng, Lin, Zifan, Valentine, Daniel, Perrin, Marshall, Pueyo, Laurent, van der Marel, Roeland P.
Water has proven to be ubiquitously detected in near-infrared (NIR) transmission spectroscopy observations of hot Jupiter atmospheres, including WASP-17b. However, previous analyses of WASP-17b's atmosphere based upon Hubble Space Telescope (HST) and
Externí odkaz:
http://arxiv.org/abs/2412.03675
Aerosols are a ubiquitous feature of planetary atmospheres and leave clear spectral imprints in exoplanet spectra. Pre-JWST, exoplanet retrieval frameworks mostly adopted simple parametric approximations. With JWST, we now have access to mid-infrared
Externí odkaz:
http://arxiv.org/abs/2410.19253
Autor:
MacDonald, Ryan J.
Publikováno v:
Journal of Open Source Software (2023): 8(81), 4873
Spectroscopic observations of exoplanet atmospheres can reveal the chemical composition, temperature, cloud properties, and (potentially) the habitability of these distant worlds. The inference of such properties is generally enabled by Bayesian atmo
Externí odkaz:
http://arxiv.org/abs/2410.18181
Autor:
Agrawal, Arnav, MacDonald, Ryan J.
Publikováno v:
Journal of Open Source Software (2024): 9(102), 6894
Atmospheric studies of exoplanets and brown dwarfs are a cutting-edge and rapidly evolving area of astrophysics research. Calculating models of exoplanet or brown dwarf spectra requires knowledge of the wavelength-dependent absorption of light (cross
Externí odkaz:
http://arxiv.org/abs/2410.14751
Autor:
Bennett, Katherine A., Sing, David K., Stevenson, Kevin B., Wakeford, Hannah R., Rustamkulov, Zafar, Allen, Natalie H., Lothringer, Joshua D., MacDonald, Ryan J., Mayne, Nathan J., Fu, Guangwei
Which rocky exoplanets have atmospheres, and which do not? This presumably simply question is the first that must be answered in the pathway toward understanding the prevalence of nearby habitable planets. A mere 6.9 pc from Earth, the LTT 1445A syst
Externí odkaz:
http://arxiv.org/abs/2410.11054
Autor:
Gressier, Amélie, MacDonald, Ryan J., Espinoza, Néstor, Wakeford, Hannah R., Lewis, Nikole K., Goyal, Jayesh, Louie, Dana R., Radica, Michael, Batalha, Natasha E., Long, Douglas, May, Erin M., Mullens, Elijah, Seager, Sara, Stevenson, Kevin B., Valenti, Jeff A., Alderson, Lili, Allen, Natalie H., Cañas, Caleb I., Challener, Ryan C., Colòn, Knicole, Glidden, Ana, Grant, David, Huang, Jingcheng, Lin, Zifan, Valentine, Daniel, Mountain, C. Matt, Pueyo, Laurent, Perrin, Marshall D., van der Marel, Roeland P.
We present the first emission spectrum of the hot Jupiter WASP-17 b using one eclipse observation from the JWST Near Infrared Imager and Slitless Spectrograph (NIRISS) Single Object Slitless Spectroscopy (SOSS) mode. Covering a wavelength range of 0.
Externí odkaz:
http://arxiv.org/abs/2410.08149
Autor:
Valentine, Daniel, Wakeford, Hannah R., Challener, Ryan C., Batalha, Natasha E., Lewis, Nikole K., Grant, David, Mullens, Elijah, Alderson, Lili, Goyal, Jayesh, MacDonald, Ryan J., May, Erin M., Seager, Sara, Stevenson, Kevin B., Valenti, Jeff A., Allen, Natalie H., Espinoza, Néstor, Glidden, Ana, Gressier, Amélie, Huang, Jingcheng, Lin, Zifan, Long, Douglas, Louie, Dana R., Clampin, Mark, Perrin, Marshall, van der Marel, Roeland P., Mountain, C. Matt
Publikováno v:
The Astronomical Journal, 168:123 (21pp), 2024 September
We present the first spectroscopic characterisation of the dayside atmosphere of WASP-17b in the mid-infrared using a single JWST MIRI/LRS eclipse observation. From forward-model fits to the 5-12 $\mu$m emission spectrum, we tightly constrain the hea
Externí odkaz:
http://arxiv.org/abs/2410.08148
Autor:
Piaulet-Ghorayeb, Caroline, Benneke, Bjorn, Radica, Michael, Raul, Eshan, Coulombe, Louis-Philippe, Ahrer, Eva-Maria, Kubyshkina, Daria, Howard, Ward S., Krissansen-Totton, Joshua, MacDonald, Ryan, Roy, Pierre-Alexis, Louca, Amy, Christie, Duncan, Fournier-Tondreau, Marylou, Allart, Romain, Miguel, Yamila, Schlichting, Hilke E., Welbanks, Luis, Cadieux, Charles, Dorn, Caroline, Evans-Soma, Thomas M., Fortney, Jonathan J., Pierrehumbert, Raymond, Lafreniere, David, Acuna, Lorena, Komacek, Thaddeus, Innes, Hamish, Beatty, Thomas G., Cloutier, Ryan, Doyon, Rene, Gagnebin, Anna, Gapp, Cyril, Knutson, Heather A.
With sizable volatile envelopes but smaller radii than the solar system ice giants, sub-Neptunes have been revealed as one of the most common types of planet in the galaxy. While the spectroscopic characterization of larger sub-Neptunes (2.5-4R$_\opl
Externí odkaz:
http://arxiv.org/abs/2410.03527
Autor:
Limbach, Mary Anne, Vanderburg, Andrew, Venner, Alexander, Blouin, Simon, Stevenson, Kevin B., MacDonald, Ryan J., Jenkins, Sydney, Bowens-Rubin, Rachel, Soares-Furtado, Melinda, Morley, Caroline, Janson, Markus, Debes, John, Xu, Siyi, Kleisioti, Evangelia, Kenworthy, Matthew, Butler, Paul, Crane, Jeffrey D., Osip, Dave, Shectman, Stephen, Teske, Johanna
The MIRI Exoplanets Orbiting White dwarfs (MEOW) Survey is a cycle 2 JWST program to search for exoplanets around dozens of nearby white dwarfs via infrared excess and direct imaging. In this paper, we present the detection of mid-infrared excess at
Externí odkaz:
http://arxiv.org/abs/2408.16813
Transmission spectroscopy is the most widely used technique for studying exoplanet atmospheres. Since the planetary nightside faces the observer during a transit, highly irradiated giant exoplanets with warm nightsides emit thermal radiation that can
Externí odkaz:
http://arxiv.org/abs/2408.07739