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A Binary Flux Calibrator Reveals the Scientific Potential of Short-integration JWST MIRI Imaging to Directly Detect sub-Jupiter Exoplanets — arXiv:2609.19133

Source: arXiv (en)
Original: https://arxiv.org/abs/2609.19133
License (as archived): CC0-1.0
Archived: 2026-10-15T18:05:12.185Z
SHA-256 of the archived text: deb014dd5884a69b86addcfc50e3ae3b7b0e14f7c18996840d879a70674edc78
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How to cite

A Binary Flux Calibrator Reveals the Scientific Potential of Short-integration JWST MIRI Imaging to Directly Detect sub-Jupiter Exoplanets — arXiv:2609.19133 — arXiv (en), https://arxiv.org/abs/2609.19133 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_995bc06e4381 (Metraipolis archive dc_995bc06e4381, sha256 deb014dd5884a69b86addcfc50e3ae3b7b0e14f7c18996840d879a70674edc78)

BibTeX

@misc{dc995bc06e4381,
  title = {A Binary Flux Calibrator Reveals the Scientific Potential of Short-integration JWST MIRI Imaging to Directly Detect sub-Jupiter Exoplanets — arXiv:2609.19133},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2609.19133},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_995bc06e4381; sha256 deb014dd5884a69b86addcfc50e3ae3b7b0e14f7c18996840d879a70674edc78},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2609.19133. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

We report the direct imaging detection of a stellar companion to HD 101452 (HIP 56925; Gaia DR3 5384905720847544192), an A star historically used as an infrared flux calibrator. The companion was identified from an asymmetry in the stellar PSF using short-integration (<1 min), noncoronagraphic JWST MIRI imaging from 15 - 25.5$\mu$m that was obtained as part of the absolute flux calibration program CAL 4496. We detect the stellar companion in four MIRI imaging filters at a projected separation of 1.3 arcsec with a mid-infrared flux ratio of approximately $27\times$ warranting its removal from the ensemble of JWST flux calibrator systems. This detection also demonstrates that noncoronagraphic MIRI imaging can recover companions at separations below $3\lambda/D$ when a reference star with a closely matched flux level to the science target is available. Using the measured contrast curves from the calibration data, we evaluate the predicted sensitivity achievable with similar short MIRI observations for nearby stars (<30 pc) that are of interest to the direct-imaging community with comparable brightness to HD 101452 (W4 ~ 6.8 mag). We find that integrations of only 17-42 s are be capable of detecting sub-Jupiter-mass planets at solar system-like separations around a subset of neighboring systems if the PSF subtraction is conducted with closely flux-matched references. These results demonstrate that minutes-length, noncoronagraphic MIRI observations can provide a powerful and efficient new avenue for exploring the cold giant planet population around nearby stars.

Tema degli esploratori: fisica e astronomia (retro-catalogo arXiv: annunci del 2026-09-17 in astro-ph.EP).
Categorie arXiv: Earth and Planetary Astrophysics (astro-ph.EP) ; Solar and Stellar Astrophysics (astro-ph.SR).
Pagina del lavoro: https://arxiv.org/abs/2609.19133 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-10-15T17:18:20.321Z dalla pagina https://arxiv.org/catchup/astro-ph.EP/2026-09-17?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).