Zobrazeno 1 - 10
of 6 671
pro vyhledávání: '"MACDONALD, A. J."'
Autor:
Fournier-Tondreau, Marylou, Pan, Yanbo, Morel, Kim, Lafrenière, David, MacDonald, Ryan J., Coulombe, Louis-Philippe, Allart, Romain, Albert, Loïc, Radica, Michael, Piaulet-Ghorayeb, Caroline, Roy, Pierre-Alexis, Pelletier, Stefan, Dang, Lisa, Doyon, René, Benneke, Björn, Cowan, Nicolas B., Darveau-Bernier, Antoine, Lim, Olivia, Artigau, Étienne, Johnstone, Doug, Kaltenegger, Lisa, Taylor, Jake, Flagg, Laura
In the era of exoplanet studies with JWST, the transiting, hot gas giant WASP-52 b provides an excellent target for atmospheric characterization through transit spectroscopy. WASP-52 b orbits an active K-type dwarf recognized for its surface heteroge
Externí odkaz:
http://arxiv.org/abs/2412.17072
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
Autor:
Bellenbaum, Hannah M., Bachmann, Benjamin, Kraus, Dominik, Gawne, Thomas, Böhme, Maximilian P., Döppner, Tilo, Fletcher, Luke B., MacDonald, Michael J., Moldabekov, Zhandos A., Preston, Thomas R., Vorberger, Jan, Dornheim, Tobias
Warm dense matter (WDM) plays an important role in astrophysical objects and technological applications, but the rigorous diagnostics of corresponding experiments is notoriously difficult. In this work, we present a model-free analysis of x-ray Thoms
Externí odkaz:
http://arxiv.org/abs/2411.06830
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:
Boehm, V. A., Lewis, N. K., Fairman, C. E., Moran, S. E., Gascón, C., Wakeford, H. R., Alam, M. K., Alderson, L., Barstow, J., Batalha, N. E., Grant, D., López-Morales, M., MacDonald, R. J., Marley, M. S., Ohno, K.
Ultraviolet wavelengths offer unique insights into aerosols in exoplanetary atmospheres. However, only a handful of exoplanets have been observed in the ultraviolet to date. Here, we present the ultraviolet-visible transmission spectrum of the inflat
Externí odkaz:
http://arxiv.org/abs/2410.17368
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? This presumably simply question is the first that must be answered to understand the prevalence of nearby habitable planets. A mere 6.9 pc from Earth, LTT 1445A is the closest transiting M-dwarf system, and it
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