Detecting free-floating planets using water-dependent colour terms in the next 
generation of infrared space-based surveys

Deacon, N. R.

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Detecting free-floating planets using water-dependent colour terms in the next generation of infrared space-based surveys

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Deacon, N. R.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

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https://ui.adsabs.harvard.edu/abs/2018MNRAS.481..447D
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Citation

Deacon, N. R. (2018). Detecting free-floating planets using water-dependent colour terms in the next generation of infrared space-based surveys. Monthly Notices of the Royal Astronomical Society, 481, 447-451.

Cite as: https://hdl.handle.net/21.11116/0000-0005-CE12-F

Abstract

The next decade will see two large-scale space-based near-infrared surveys, Euclid and WFIRST. This paper shows that the subtle differences between the filters proposed for these surveys and those from ground- based photometric systems will produce a ground-space colour term that is dependent on water absorption in the spectra of astronomical objects. This colour term can be used to identify free-floating planets in star- forming regions, mimicking a successful ground-based technique that uses a filter sensitive to water absorption. This paper shows that this colour term is an effective discriminant between reddened background stars and ultracool dwarfs. This represents just one science justification for a Galactic Plane survey in the event of an extension to the Euclid mission beyond its original time frame.