First JWST spectrum of distant activity in Long Period Comet C/2024 E1 (Wierzchos)
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arXiv
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| Format: | Preprint |
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2025
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| author | Snodgrass, Colin Holt, Carrie E. Kelley, Michael S. P. Opitom, Cyrielle Guilbert-Lepoutre, Aurélie Knight, Matthew M. Kokotanekova, Rosita Jehin, Emmanuel Epifani, Elena Mazzotta Migliorini, Alessandra Tubiana, Cecilia Micheli, Marco Farnocchia, Davide |
| author_facet | Snodgrass, Colin Holt, Carrie E. Kelley, Michael S. P. Opitom, Cyrielle Guilbert-Lepoutre, Aurélie Knight, Matthew M. Kokotanekova, Rosita Jehin, Emmanuel Epifani, Elena Mazzotta Migliorini, Alessandra Tubiana, Cecilia Micheli, Marco Farnocchia, Davide |
| contents | We observed the new Long Period Comet C/2024 E1 (Wierzchos), inbound at 7 au from the Sun, using the NIRSpec integral field unit on JWST. The spectrum shows absorption features due to water ice in the coma and evidence for CO$_2$ driven activity, with a production rate of $Q(CO_2) = 2.546 \pm 0.019 \times 10^{25}$ molecules s$^{-1}$, and no emission features of water or CO. The latter is surprising, given that CO is more volatile than CO$_2$, and suggests that this comet may have lost its near-surface CO during its early evolution, before implantation in the Oort cloud. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2503_14071 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | First JWST spectrum of distant activity in Long Period Comet C/2024 E1 (Wierzchos) Snodgrass, Colin Holt, Carrie E. Kelley, Michael S. P. Opitom, Cyrielle Guilbert-Lepoutre, Aurélie Knight, Matthew M. Kokotanekova, Rosita Jehin, Emmanuel Epifani, Elena Mazzotta Migliorini, Alessandra Tubiana, Cecilia Micheli, Marco Farnocchia, Davide Earth and Planetary Astrophysics We observed the new Long Period Comet C/2024 E1 (Wierzchos), inbound at 7 au from the Sun, using the NIRSpec integral field unit on JWST. The spectrum shows absorption features due to water ice in the coma and evidence for CO$_2$ driven activity, with a production rate of $Q(CO_2) = 2.546 \pm 0.019 \times 10^{25}$ molecules s$^{-1}$, and no emission features of water or CO. The latter is surprising, given that CO is more volatile than CO$_2$, and suggests that this comet may have lost its near-surface CO during its early evolution, before implantation in the Oort cloud. |
| title | First JWST spectrum of distant activity in Long Period Comet C/2024 E1 (Wierzchos) |
| topic | Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2503.14071 |