Unveiling the atmosphere of the super-Jupiter HAT-P-14 b with JWST NIRISS and NIRSpec
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| Format: | Preprint |
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2025
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| _version_ | 1866912322087288832 |
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| author | Liu, Rongrong Wang, Le-Chris Rustamkulov, Zafar Sing, David K. |
| author_facet | Liu, Rongrong Wang, Le-Chris Rustamkulov, Zafar Sing, David K. |
| contents | We report the combined JWST NIRSpec/G395H and NIRISS/SOSS transmission spectrum of the transiting super-Jupiter HAT-P-14 b, from 0.60 $μm$ to 5.14 $μm$. Initial analysis of these data reported a near-featureless spectrum at NIRSpec wavelengths range (2.87 $μm$ to 5.14 $μm$) consistent with the small atmospheric scale height of the planet and unexplained bumps and wiggles at NIRISS wavelengths range (0.6 $μm$ to 2.8 $μm$). Here, we produce a self-consistent spectrum of HAT-P-14 b's atmosphere with an up-to-date reduction. We detect H$_2$O (3.09 $σ$) both across NIRISS/SOSS wavelengths range and at the bluest end of NIRSpc/G395H as well as a gray cloud deck (1.90 $σ$). We constrain the atmospheric metallicity of HAT-P-14 b to be roughly Solar, with [Fe/H] $= -0.08^{+0.89}_{-0.98}$, consistent with the planet mass-metallicity relationship. The differences compared to previous works are likely due to the improved STScI jwst pipeline, which highlights the need to reanalyze the early NIRISS/SOSS transiting exoplanet targets with the latest methods. As HAT-P-14 b is placed as the 805th best target for transmission spectroscopy according to Transmission Spectroscopy Metrics (TSM), our results showcase JWST's unparalleled photometric precision which can easily characterize a thousand exoplanets' atmospheres through transmission spectroscopy. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_08903 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Unveiling the atmosphere of the super-Jupiter HAT-P-14 b with JWST NIRISS and NIRSpec Liu, Rongrong Wang, Le-Chris Rustamkulov, Zafar Sing, David K. Earth and Planetary Astrophysics We report the combined JWST NIRSpec/G395H and NIRISS/SOSS transmission spectrum of the transiting super-Jupiter HAT-P-14 b, from 0.60 $μm$ to 5.14 $μm$. Initial analysis of these data reported a near-featureless spectrum at NIRSpec wavelengths range (2.87 $μm$ to 5.14 $μm$) consistent with the small atmospheric scale height of the planet and unexplained bumps and wiggles at NIRISS wavelengths range (0.6 $μm$ to 2.8 $μm$). Here, we produce a self-consistent spectrum of HAT-P-14 b's atmosphere with an up-to-date reduction. We detect H$_2$O (3.09 $σ$) both across NIRISS/SOSS wavelengths range and at the bluest end of NIRSpc/G395H as well as a gray cloud deck (1.90 $σ$). We constrain the atmospheric metallicity of HAT-P-14 b to be roughly Solar, with [Fe/H] $= -0.08^{+0.89}_{-0.98}$, consistent with the planet mass-metallicity relationship. The differences compared to previous works are likely due to the improved STScI jwst pipeline, which highlights the need to reanalyze the early NIRISS/SOSS transiting exoplanet targets with the latest methods. As HAT-P-14 b is placed as the 805th best target for transmission spectroscopy according to Transmission Spectroscopy Metrics (TSM), our results showcase JWST's unparalleled photometric precision which can easily characterize a thousand exoplanets' atmospheres through transmission spectroscopy. |
| title | Unveiling the atmosphere of the super-Jupiter HAT-P-14 b with JWST NIRISS and NIRSpec |
| topic | Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2504.08903 |