Investing in the Unrivaled Potential of Wide-Separation Sub-Jupiter Exoplanet Detection and Characterisation with JWST — Strategic Exoplanet Initiatives with HST and JWST White Paper
We advocate for a large scale imaging survey of nearby young moving groups and star-forming regions to directly detect exoplanets over an unexplored range of masses, ages and orbits. Discovered objects will be identified early enough in JWST’s lifetime to leverage its unparalleled capabilities for long-term atmospheric characterisation, and will uniquely complement the known population of exoplanets and brown dwarfs.
Furthermore, this survey will constrain the occurrence of the novel wide sub-Jovian exoplanet population, informing multiple theories of planetary formation and evolution. Observations with NIRCam F200W+F444W dual-band coronagraphy will readily provide sub-Jupiter mass sensitivities beyond ~0.4″ (F444W) and can also be used to rule out some contaminating background sources (F200W).
At this large scale, targets can be sequenced by spectral type to enable robust self-referencing for PSF subtraction. This eliminates the need for dedicated reference observations required by GO programs and dramatically increases the overall science observing efficiency. With an exposure of ~30 minutes per target, the sub-Jupiter regime can be explored across 250 targets for ~400 hours of exposure time including overheads.
An additional, pre-allocated, ~100 hours of observing time would enable rapid multi-epoch vetting of the lowest mass detections (which are undetectable in F200W). The total time required for a survey such as this is not fixed, and could be scaled in conjunction with the minimum number of detected exoplanet companions.
Aarynn L. Carter, Rachel Bowens-Rubin, Per Calissendorff, Jens Kammerer, Yiting Li, Michael R. Meyer, Mark Booth, Samuel M. Factor, Kyle Franson, Eric Gaidos, Jarron M. Leisenring, Ben W.P. Lew, Raquel A. Martinez, Isabel Rebollido, Emily Rickman, Ben J. Sutlieff, Kimberly Ward-Duong, Zhoujian Zhang
Comments: 5 pages, 2 figures. This white paper was submitted following a call from the “Working Group on Strategic Exoplanet Initiatives with HST and JWST” (this https URL, final report in https://doi.org/10.48550/arXiv.2404.02932)
Subjects: Instrumentation and Methods for Astrophysics (astro-ph.IM); Earth and Planetary Astrophysics (astro-ph.EP); Solar and Stellar Astrophysics (astro-ph.SR)
Cite as: arXiv:2408.07722 [astro-ph.IM] (or arXiv:2408.07722v1 [astro-ph.IM] for this version)
https://doi.org/10.48550/arXiv.2408.07722
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Submission history
From: Aarynn Carter Dr
[v1] Wed, 14 Aug 2024 13:18:26 UTC (2,178 KB)
https://arxiv.org/abs/2408.07722
Astrobiology,
