Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/31666
Title: | Hiding in plain sight: observing planet-starspot crossings with the James Webb Space Telescope | Authors: | BRUNO, GIOVANNI Nikole K. Lewis Jeff A. Valenti PAGANO, Isabella Tom J. Wilson Everett Schlawin Joshua Lothringer LANZA, Antonino Francesco Jonathan Fraine SCANDARIATO, GAETANO MICELA, Giuseppina CRACCHIOLO, GIANLUCA |
Issue Date: | 2022 | Journal: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Number: | 509 | Issue: | 4 | First Page: | 5030 | Abstract: | Transiting exoplanets orbiting active stars frequently occult starspots and faculae on the visible stellar disc. Such occultations are often rejected from spectrophotometric transits, as it is assumed they do not contain relevant information for the study of exoplanet atmopsheres. However, they can provide useful constraints to retrieve the temperature of active features and their effect on transmission spectra. We analyse the capabilities of the James Webb Space Telescope in the determination of the spectra of occulted starspots, despite its lack of optical wavelength instruments on board. Focusing on K and M spectral types, we simulate starspots with different temperatures and in different locations of the stellar disc, and find that starspot temperatures can be determined to within a few hundred kelvins using NIRSpec/Prism and the proposed NIRCam/F150W2$+$F322W2's broad wavelength capabilities. Our results are particularly promising in the case of K and M dwarfs of mag$_K \leq 12.5$ with large temperature contrasts. | URI: | http://hdl.handle.net/20.500.12386/31666 | URL: | https://academic.oup.com/mnras/article/509/4/5030/6446813?login=true http://arxiv.org/abs/2111.00828v2 |
ISSN: | 0035-8711 | DOI: | 10.1093/mnras/stab3199 | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
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Bruno+2022.pdf | preprint | 2.15 MB | Adobe PDF | View/Open |
stab3199 compr 1.pdf | Pdf editoriale pt. 1 | 9 MB | Adobe PDF | View/Open |
stab3199 compr 2.pdf | Pdf editoriale pt. 2 | 1.5 MB | Adobe PDF | View/Open |
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