Colour–colour and colour–magnitude diagrams for hot Jupiters
Article
Article Title | Colour–colour and colour–magnitude diagrams for hot Jupiters |
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ERA Journal ID | 1074 |
Article Category | Article |
Authors | Melville, G. (Author), Kedziora-Chudczer, L. (Author) and Bailey, J. (Animator) |
Journal Title | Monthly Notices of the Royal Astronomical Society |
Journal Citation | 494 (4), pp. 4939-4949 |
Number of Pages | 11 |
Year | 2020 |
Publisher | Oxford University Press |
Place of Publication | United Kingdom |
ISSN | 0035-8711 |
1365-2966 | |
Digital Object Identifier (DOI) | https://doi.org/10.1093/mnras/staa1074 |
Web Address (URL) | https://academic.oup.com/mnras/article/494/4/4939/5824644 |
Abstract | We use ground-based and space-based eclipse measurements for the near-infrared (IR) bands (JHKs) and Spitzer 3.6- and 4.5-μm bands to construct colour–colour and colour–magnitude diagrams for hot Jupiters. We compare the results with previous observations of substellar objects and find that hot Jupiters, when corrected for their inflated radii, lie near the blackbody line and in the same region of the colour–magnitude diagrams as brown dwarfs, including low-gravity dwarfs that have been previously suggested as exoplanet analogues. We use theoretical emission spectra to investigate the effects of different metallicity, C/O ratios, and temperatures on the IR colours. In general, we find that while differences in C/O ratio and metallicity do correspond to different locations on these diagrams, the measurement errors are too large to use this method to put strong constraints on the composition of individual objects. However, as a class, hot Jupiters cluster around the location expected for solar metallicity and C/O ratio. |
Keywords | radiative transfer, planets and satellites: atmospheres, brown dwarfs |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2020 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
Byline Affiliations | University of New South Wales |
Centre for Astrophysics | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q76xw/colour-colour-and-colour-magnitude-diagrams-for-hot-jupiters
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