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PreprintarXiv licencearXiv

Predictions for an unseen third planet in the WISPIT 2 system

  • Amena Faruqi
  • Farzana Meru
  • Gabriel-Dominique Marleau
  • Pooneh Nazari
  • Andrew Swan
  • Ralph E. Pudritz
  • Thomas G. Wilson
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Abstract

We predict the mass and semi-major axis of a currently unseen but hypothesised planet in the WISPIT 2 system based on the location of the ring observed by ALMA at 144.4 au. Using findings from previous hydrodynamical models, we predict that a ~0.2-1 MJup planet may exist at ~ 100-120 au. We also demonstrate that the ring seen in VLT/SPHERE observations at 96.7 au is consistent with the mass and semi-major axis of WISPIT 2b and confirm that WISPIT 2b cannot be the cause of the ALMA ring. We also discuss how future observations of the system's gas component may help constrain these predictions better, and note that this third planet in WISPIT 2 may be discoverable using upcoming JWST/NIRCam observations or Gaia data release 4 (DR4).

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Cite

BibTeXRIS
BibTeX
@misc{faruqi2026predictions,
  title = {{Predictions for an unseen third planet in the WISPIT 2 system}},
  author = {Amena Faruqi and Farzana Meru and Gabriel-Dominique Marleau and Pooneh Nazari and Andrew Swan and Ralph E. Pudritz and Thomas G. Wilson},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.30115},
  eprint = {2610.30115},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.30115},
}
RIS
TY  - UNPB
TI  - Predictions for an unseen third planet in the WISPIT 2 system
AU  - Amena Faruqi
AU  - Farzana Meru
AU  - Gabriel-Dominique Marleau
AU  - Pooneh Nazari
AU  - Andrew Swan
AU  - Ralph E. Pudritz
AU  - Thomas G. Wilson
PY  - 2026
DA  - 2026/10/21
PB  - arXiv
DO  - 10.48550/arxiv.2610.30115
UR  - https://arxiv.org/abs/2610.30115
AB  - We predict the mass and semi-major axis of a currently unseen but hypothesised planet in the WISPIT 2 system based on the location of the ring observed by ALMA at 144.4 au. Using findings from previous hydrodynamical models, we predict that a ~0.2-1 M_Jup planet may exist at ~ 100-120 au. We also demonstrate that the ring seen in VLT/SPHERE observations at 96.7 au is consistent with the mass and semi-major axis of WISPIT 2b and confirm that WISPIT 2b cannot be the cause of the ALMA ring. We also discuss how future observations of the system's gas component may help constrain these predictions better, and note that this third planet in WISPIT 2 may be discoverable using upcoming JWST/NIRCam observations or Gaia data release 4 (DR4).
ER  -