BOWIE-ALIGN: Sub-solar C/O ratio and metallicity atmosphere of the misaligned hot Jupiter HAT-P-30b
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2026
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866917210334691328 |
|---|---|
| author | Claringbold, Alastair B. Fisher, Chloe E. Kirk, James Ahrer, Eva-Maria Penzlin, Anna B. T. Thorngren, Daniel P. López-Morales, Mercedes Wheatley, Peter J. Alderson, Lili Booth, Richard A. Christie, Duncan A. Fairman, Charlotte Mayne, Nathan J. McCormack, Mason Meech, Annabella Owen, James E. Panwar, Vatsal Sergeev, Denis E. Valentine, Daniel Wakeford, Hannah R. Zamyatina, Maria |
| author_facet | Claringbold, Alastair B. Fisher, Chloe E. Kirk, James Ahrer, Eva-Maria Penzlin, Anna B. T. Thorngren, Daniel P. López-Morales, Mercedes Wheatley, Peter J. Alderson, Lili Booth, Richard A. Christie, Duncan A. Fairman, Charlotte Mayne, Nathan J. McCormack, Mason Meech, Annabella Owen, James E. Panwar, Vatsal Sergeev, Denis E. Valentine, Daniel Wakeford, Hannah R. Zamyatina, Maria |
| contents | We present the JWST NIRSpec/G395H transmission spectrum of the misaligned hot Jupiter HAT-P-30b from 2.8--5.2 $μ$m as part of the BOWIE-ALIGN survey, a comparative survey designed to probe the link between planet formation and atmospheric composition in samples of misaligned and aligned hot Jupiters orbiting F-type stars. Through independent data reductions and retrieval analyses, we find evidence for absorption features of H$_2$O and CO$_2$ in the atmosphere of HAT-P-30b. Our retrieved abundances are consistent with equilibrium chemistry, from which we infer a sub-solar C/O ratio (0.16--0.45), and sub-solar and sub-stellar metallicity (0.2--0.8$\times$solar, compared to a stellar metallicity of 1.1--1.6$\times$solar), with muted spectral features. This composition challenges formation models of continuous migration and accretion within a steady disc of stellar metallicity, and could be the result of low C/O ratio gas accretion within the water ice line, low metallicity accretion due to the trapping of volatiles further out in the disc, or the combined accretion of low metallicity gas and carbon-poor solids. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_13104 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | BOWIE-ALIGN: Sub-solar C/O ratio and metallicity atmosphere of the misaligned hot Jupiter HAT-P-30b Claringbold, Alastair B. Fisher, Chloe E. Kirk, James Ahrer, Eva-Maria Penzlin, Anna B. T. Thorngren, Daniel P. López-Morales, Mercedes Wheatley, Peter J. Alderson, Lili Booth, Richard A. Christie, Duncan A. Fairman, Charlotte Mayne, Nathan J. McCormack, Mason Meech, Annabella Owen, James E. Panwar, Vatsal Sergeev, Denis E. Valentine, Daniel Wakeford, Hannah R. Zamyatina, Maria Earth and Planetary Astrophysics We present the JWST NIRSpec/G395H transmission spectrum of the misaligned hot Jupiter HAT-P-30b from 2.8--5.2 $μ$m as part of the BOWIE-ALIGN survey, a comparative survey designed to probe the link between planet formation and atmospheric composition in samples of misaligned and aligned hot Jupiters orbiting F-type stars. Through independent data reductions and retrieval analyses, we find evidence for absorption features of H$_2$O and CO$_2$ in the atmosphere of HAT-P-30b. Our retrieved abundances are consistent with equilibrium chemistry, from which we infer a sub-solar C/O ratio (0.16--0.45), and sub-solar and sub-stellar metallicity (0.2--0.8$\times$solar, compared to a stellar metallicity of 1.1--1.6$\times$solar), with muted spectral features. This composition challenges formation models of continuous migration and accretion within a steady disc of stellar metallicity, and could be the result of low C/O ratio gas accretion within the water ice line, low metallicity accretion due to the trapping of volatiles further out in the disc, or the combined accretion of low metallicity gas and carbon-poor solids. |
| title | BOWIE-ALIGN: Sub-solar C/O ratio and metallicity atmosphere of the misaligned hot Jupiter HAT-P-30b |
| topic | Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2601.13104 |