Nicholas Scarsdale, C. E. Harman, Thomas J. Fauchez
{"title":"自旋区:同步旋转和非同步旋转的系外行星在传输方面存在光谱差异","authors":"Nicholas Scarsdale, C. E. Harman, Thomas J. Fauchez","doi":"arxiv-2409.10752","DOIUrl":null,"url":null,"abstract":"New observational facilities are beginning to enable insights into the\nthree-dimensional (3D) nature of exoplanets. Transmission spectroscopy is the\nmost widely used method for characterizing transiting temperate exoplanet's\natmospheres, but because it only provides a glimpse of the planet's limb and\nnightside for a typical orbit, its ability to probe 3D characteristics is still\nan active area of research. Here, we use the ROCKE-3D general circulation model\nto test the impact of rotation rate, a ``low-order'' 3D characteristic\npreviously shown to drive differences in planetary phase curves, on the\ntransmission spectrum of a representative super-Earth across temperate-to-warm\ninstellations (S$_p$=0.8, 1, 1.25, 1.66, 2, 2.5, 3, 4, 4.56 S$_\\oplus$). We\nfind that different rotation regimes do display differences in their\ntransmission spectra, primarily driven by clouds and humidity, and that the\ndifferences shrink or disappear in hotter regimes where water clouds are unable\nto condense (though our simulations do not consider haze formation). The small\nsize of the feature differences and potential for degeneracy with other\nproperties, like differing water content or atmospheric structure, mean that we\ndo not specifically claim to have identified a single transmission diagnostic\nfor rotation rate, but our results can be used for holistic spectrum\ninterpretation and sample creation, and suggest the need for more modelling in\nthis area.","PeriodicalId":501209,"journal":{"name":"arXiv - PHYS - Earth and Planetary Astrophysics","volume":"8 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"The Spin Zone: Synchronously and Asynchronously Rotating Exoplanets Have Spectral Differences in Transmission\",\"authors\":\"Nicholas Scarsdale, C. E. Harman, Thomas J. Fauchez\",\"doi\":\"arxiv-2409.10752\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"New observational facilities are beginning to enable insights into the\\nthree-dimensional (3D) nature of exoplanets. Transmission spectroscopy is the\\nmost widely used method for characterizing transiting temperate exoplanet's\\natmospheres, but because it only provides a glimpse of the planet's limb and\\nnightside for a typical orbit, its ability to probe 3D characteristics is still\\nan active area of research. Here, we use the ROCKE-3D general circulation model\\nto test the impact of rotation rate, a ``low-order'' 3D characteristic\\npreviously shown to drive differences in planetary phase curves, on the\\ntransmission spectrum of a representative super-Earth across temperate-to-warm\\ninstellations (S$_p$=0.8, 1, 1.25, 1.66, 2, 2.5, 3, 4, 4.56 S$_\\\\oplus$). We\\nfind that different rotation regimes do display differences in their\\ntransmission spectra, primarily driven by clouds and humidity, and that the\\ndifferences shrink or disappear in hotter regimes where water clouds are unable\\nto condense (though our simulations do not consider haze formation). The small\\nsize of the feature differences and potential for degeneracy with other\\nproperties, like differing water content or atmospheric structure, mean that we\\ndo not specifically claim to have identified a single transmission diagnostic\\nfor rotation rate, but our results can be used for holistic spectrum\\ninterpretation and sample creation, and suggest the need for more modelling in\\nthis area.\",\"PeriodicalId\":501209,\"journal\":{\"name\":\"arXiv - PHYS - Earth and Planetary Astrophysics\",\"volume\":\"8 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-09-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"arXiv - PHYS - Earth and Planetary Astrophysics\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/arxiv-2409.10752\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv - PHYS - Earth and Planetary Astrophysics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2409.10752","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
The Spin Zone: Synchronously and Asynchronously Rotating Exoplanets Have Spectral Differences in Transmission
New observational facilities are beginning to enable insights into the
three-dimensional (3D) nature of exoplanets. Transmission spectroscopy is the
most widely used method for characterizing transiting temperate exoplanet's
atmospheres, but because it only provides a glimpse of the planet's limb and
nightside for a typical orbit, its ability to probe 3D characteristics is still
an active area of research. Here, we use the ROCKE-3D general circulation model
to test the impact of rotation rate, a ``low-order'' 3D characteristic
previously shown to drive differences in planetary phase curves, on the
transmission spectrum of a representative super-Earth across temperate-to-warm
instellations (S$_p$=0.8, 1, 1.25, 1.66, 2, 2.5, 3, 4, 4.56 S$_\oplus$). We
find that different rotation regimes do display differences in their
transmission spectra, primarily driven by clouds and humidity, and that the
differences shrink or disappear in hotter regimes where water clouds are unable
to condense (though our simulations do not consider haze formation). The small
size of the feature differences and potential for degeneracy with other
properties, like differing water content or atmospheric structure, mean that we
do not specifically claim to have identified a single transmission diagnostic
for rotation rate, but our results can be used for holistic spectrum
interpretation and sample creation, and suggest the need for more modelling in
this area.