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dc.contributor.authorRimmer, Paul
dc.contributor.authorMajumdar, L
dc.contributor.authorPriyadarshi, A
dc.contributor.authorWright, S
dc.contributor.authorYurchenko, SN
dc.date.accessioned2021-11-05T17:31:52Z
dc.date.available2021-11-05T17:31:52Z
dc.date.issued2021-11
dc.date.submitted2021-07-27
dc.identifier.issn2041-8205
dc.identifier.otherapjlac2f3a
dc.identifier.otherac2f3a
dc.identifier.otheraas33720
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/330343
dc.description.abstractAbstract: We predict that cyanoacetylene (HC3N) is produced photochemically in the atmosphere of GJ 1132 b in abundances detectable by the James Webb Space Telescope (JWST), assuming that the atmosphere is hydrogen dominated and rich in molecular nitrogen (N2), methane (CH4), and hydrogen cyanide (HCN), as described by Swain et al. First, we construct line lists and cross sections for HC3N. Then we apply these cross sections and the model atmosphere of Swain et al. to a radiative transfer model in order to simulate the transmission spectrum of GJ 1132 b as it would be seen by JWST, accounting for the uncertainty in the retrieved abundances. We predict that cyanoacetylene features at various wavelengths, with a clear lone feature at 4.5 μm, observable by JWST after one transit. This feature persists within the 1σ uncertainty of the retrieved abundances of HCN and CH4. The signal is detectable for stratospheric temperatures ≲600 K and moderate stratospheric mixing (106 cm2 s−1 ≲ K zz ≲ 108 cm2 s−1). Our results also indicate that HC3N is an important source of opacity that future retrieval models should consider.
dc.languageen
dc.publisherAmerican Astronomical Society
dc.titleDetectable abundance of cyanoacetylene (hc3n) predicted on reduced nitrogen-rich super-earth atmospheres
dc.typeArticle
dc.date.updated2021-11-05T17:31:52Z
prism.issueIdentifier2
prism.publicationNameAstrophysical Journal Letters
prism.volume921
dc.identifier.doi10.17863/CAM.77786
dcterms.dateAccepted2021-10-11
rioxxterms.versionofrecord10.3847/2041-8213/ac2f3a
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/
dc.contributor.orcidRimmer, Paul [0000-0002-7180-081X]
dc.contributor.orcidMajumdar, L [0000-0001-7031-8039]
dc.contributor.orcidPriyadarshi, A [0000-0003-1143-0877]
dc.contributor.orcidYurchenko, SN [0000-0001-9286-9501]
dc.identifier.eissn2041-8213
pubs.funder-project-idSimons Foundation (SF) (599634)
pubs.funder-project-idUKRI ∣ Science and Technology Facilities Council (STFC) (ST/R000476/1)
pubs.funder-project-idUKRI ∣ Science and Technology Facilities Council (STFC) (ST/P006736/1)
pubs.funder-project-idEC ∣ H2020 ∣ H2020 Priority Excellent Science ∣ H2020 European Research Council (ERC) (883830)
cam.issuedOnline2021-11-04


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