Limits on Dione's activity using Cassini/CIRS data
We use nighttime Cassini Composite Infrared Spectrometer (CIRS) data to look for discrete regions of elevated nighttime temperatures indicative of endogenic activity on Dione's surface. This is achieved by producing low latitude and midlatitude (less than 60°) maps of Dione's nighttime sur...
| Κύριοι συγγραφείς: | , , , , |
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| Μορφή: | Journal article |
| Γλώσσα: | English |
| Έκδοση: |
Wiley
2018
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| _version_ | 1826275703045226496 |
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| author | Howett, CJA Spencer, JR Hurford, T Verbiscer, A Segura, M |
| author_facet | Howett, CJA Spencer, JR Hurford, T Verbiscer, A Segura, M |
| author_sort | Howett, CJA |
| collection | OXFORD |
| description | We use nighttime Cassini Composite Infrared Spectrometer (CIRS) data to look for discrete regions of elevated nighttime temperatures indicative of endogenic activity on Dione's surface. This is achieved by producing low latitude and midlatitude (less than 60°) maps of Dione's nighttime surface temperature, derived from 10 to 1,100-cm−1 CIRS data. The surface temperatures observed do not show evidence of any small discrete regions of elevated nighttime temperatures and are comparable to temperatures predicted by a passive thermophysical model of Dione's surface. Thus, we conclude that no evidence for activity exists on Dione at midlatitude to low latitude. Using the derived surface temperature maps, we set upper limits for the temperature at which a 50-, 100-, or 200-km2 hot spot would remain undetected by this study. We find the mean temperature of such a hot spot would be 117.1 ± 47.2 K (−249 F), 104.8 ± 27.7 K (−272 F), and 95.4 ± 19.5 K (−288 F) for a 50-, 100-, and 200-km2 hot spot, respectively, corresponding to endogenic emission of 1.07, 0.68, and 0.47 GW.
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| first_indexed | 2024-03-06T23:02:48Z |
| format | Journal article |
| id | oxford-uuid:62bd7d4d-645b-42e7-b32a-e62cd7560dbd |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T23:02:48Z |
| publishDate | 2018 |
| publisher | Wiley |
| record_format | dspace |
| spelling | oxford-uuid:62bd7d4d-645b-42e7-b32a-e62cd7560dbd2022-03-26T18:08:18ZLimits on Dione's activity using Cassini/CIRS dataJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:62bd7d4d-645b-42e7-b32a-e62cd7560dbdEnglishSymplectic ElementsWiley2018Howett, CJASpencer, JRHurford, TVerbiscer, ASegura, MWe use nighttime Cassini Composite Infrared Spectrometer (CIRS) data to look for discrete regions of elevated nighttime temperatures indicative of endogenic activity on Dione's surface. This is achieved by producing low latitude and midlatitude (less than 60°) maps of Dione's nighttime surface temperature, derived from 10 to 1,100-cm−1 CIRS data. The surface temperatures observed do not show evidence of any small discrete regions of elevated nighttime temperatures and are comparable to temperatures predicted by a passive thermophysical model of Dione's surface. Thus, we conclude that no evidence for activity exists on Dione at midlatitude to low latitude. Using the derived surface temperature maps, we set upper limits for the temperature at which a 50-, 100-, or 200-km2 hot spot would remain undetected by this study. We find the mean temperature of such a hot spot would be 117.1 ± 47.2 K (−249 F), 104.8 ± 27.7 K (−272 F), and 95.4 ± 19.5 K (−288 F) for a 50-, 100-, and 200-km2 hot spot, respectively, corresponding to endogenic emission of 1.07, 0.68, and 0.47 GW. |
| spellingShingle | Howett, CJA Spencer, JR Hurford, T Verbiscer, A Segura, M Limits on Dione's activity using Cassini/CIRS data |
| title | Limits on Dione's activity using Cassini/CIRS data |
| title_full | Limits on Dione's activity using Cassini/CIRS data |
| title_fullStr | Limits on Dione's activity using Cassini/CIRS data |
| title_full_unstemmed | Limits on Dione's activity using Cassini/CIRS data |
| title_short | Limits on Dione's activity using Cassini/CIRS data |
| title_sort | limits on dione s activity using cassini cirs data |
| work_keys_str_mv | AT howettcja limitsondionesactivityusingcassinicirsdata AT spencerjr limitsondionesactivityusingcassinicirsdata AT hurfordt limitsondionesactivityusingcassinicirsdata AT verbiscera limitsondionesactivityusingcassinicirsdata AT seguram limitsondionesactivityusingcassinicirsdata |