Unveiling the Atmosphere of the Super-Jupiter HAT-P-14 b with JWST NIRISS and NIRSpec
We report the combined JWST Near Infrared Spectrograph (NIRSpec)/G395H and the Near Infrared Imager and Slitless Spectrograph (NIRISS)/Single Object Slitless Spectroscopy (SOSS) transmission spectrum of the transiting super-Jupiter HAT-P-14 b, from 0.60 to 5.14 μ m. Initial analysis of these data re...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2025-01-01
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| Series: | The Astronomical Journal |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/1538-3881/adcba7 |
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| Summary: | We report the combined JWST Near Infrared Spectrograph (NIRSpec)/G395H and the Near Infrared Imager and Slitless Spectrograph (NIRISS)/Single Object Slitless Spectroscopy (SOSS) transmission spectrum of the transiting super-Jupiter HAT-P-14 b, from 0.60 to 5.14 μ m. Initial analysis of these data reported a near-featureless spectrum at NIRSpec wavelengths range (2.87–5.14 μ m) consistent with the small atmospheric scale height of the planet and unexplained bumps and wiggles at NIRISS wavelengths range (0.6–2.8 μ m). 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 NIRSpec/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] $=-0.0{8}_{-0.98}^{+0.89}$ , 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, our results showcase JWST’s unparalleled photometric precision which can easily characterize a thousand exoplanets’ atmospheres through transmission spectroscopy. |
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| ISSN: | 1538-3881 |