ALMA OBSERVATIONS OF HCN AND ITS ISOTOPOLOGUES ON TITAN
All rights reserved.We present sub-millimeter spectra of HCN isotopologues on Titan, derived from publicly available ALMA flux calibration observations of Titan taken in early 2014. We report the detection of a new HCN isotopologue on Titan, H13C15N, and confirm an earlier report of detection of DCN...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Journal article |
| Published: |
American Astronomial Society
2016
|
| _version_ | 1797058961913937920 |
|---|---|
| author | Molter, E Nixon, C Cordiner, M Serigano, J Irwin, P Teanby, N Charnley, S Lindberg, J |
| author_facet | Molter, E Nixon, C Cordiner, M Serigano, J Irwin, P Teanby, N Charnley, S Lindberg, J |
| author_sort | Molter, E |
| collection | OXFORD |
| description | All rights reserved.We present sub-millimeter spectra of HCN isotopologues on Titan, derived from publicly available ALMA flux calibration observations of Titan taken in early 2014. We report the detection of a new HCN isotopologue on Titan, H13C15N, and confirm an earlier report of detection of DCN. We model high signal-to-noise observations of HCN, H13CN, HC15N, DCN, and H13C15N to derive abundances and infer the following isotopic ratios: 12C/13C = 89.8 ±2.8, 14N/15N = 72.3 ±2.2, D/H = (2.5 ± 0.2) ×10-4, and HCN/H13C15N = 5800 ±270 (1σ errors). The carbon and nitrogen ratios are consistent with and improve on the precision of previous results, confirming a factor of ∼2.3 elevation in 14N/15N in HCN compared to N2 and a lack of fractionation in 12C/13C from the protosolar value. This is the first published measurement of D/H in a nitrile species on Titan, and we find evidence for a factor of ∼2 deuterium enrichment in hydrogen cyanide compared to methane. The isotopic ratios we derive may be used as constraints for future models to better understand the fractionation processes occurring in Titan's atmosphere. |
| first_indexed | 2024-03-06T19:57:28Z |
| format | Journal article |
| id | oxford-uuid:261f0bd2-f4f2-4537-93dc-72f63c81c51e |
| institution | University of Oxford |
| last_indexed | 2024-03-06T19:57:28Z |
| publishDate | 2016 |
| publisher | American Astronomial Society |
| record_format | dspace |
| spelling | oxford-uuid:261f0bd2-f4f2-4537-93dc-72f63c81c51e2022-03-26T11:59:14ZALMA OBSERVATIONS OF HCN AND ITS ISOTOPOLOGUES ON TITANJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:261f0bd2-f4f2-4537-93dc-72f63c81c51eSymplectic Elements at OxfordAmerican Astronomial Society2016Molter, ENixon, CCordiner, MSerigano, JIrwin, PTeanby, NCharnley, SLindberg, JAll rights reserved.We present sub-millimeter spectra of HCN isotopologues on Titan, derived from publicly available ALMA flux calibration observations of Titan taken in early 2014. We report the detection of a new HCN isotopologue on Titan, H13C15N, and confirm an earlier report of detection of DCN. We model high signal-to-noise observations of HCN, H13CN, HC15N, DCN, and H13C15N to derive abundances and infer the following isotopic ratios: 12C/13C = 89.8 ±2.8, 14N/15N = 72.3 ±2.2, D/H = (2.5 ± 0.2) ×10-4, and HCN/H13C15N = 5800 ±270 (1σ errors). The carbon and nitrogen ratios are consistent with and improve on the precision of previous results, confirming a factor of ∼2.3 elevation in 14N/15N in HCN compared to N2 and a lack of fractionation in 12C/13C from the protosolar value. This is the first published measurement of D/H in a nitrile species on Titan, and we find evidence for a factor of ∼2 deuterium enrichment in hydrogen cyanide compared to methane. The isotopic ratios we derive may be used as constraints for future models to better understand the fractionation processes occurring in Titan's atmosphere. |
| spellingShingle | Molter, E Nixon, C Cordiner, M Serigano, J Irwin, P Teanby, N Charnley, S Lindberg, J ALMA OBSERVATIONS OF HCN AND ITS ISOTOPOLOGUES ON TITAN |
| title | ALMA OBSERVATIONS OF HCN AND ITS ISOTOPOLOGUES ON TITAN |
| title_full | ALMA OBSERVATIONS OF HCN AND ITS ISOTOPOLOGUES ON TITAN |
| title_fullStr | ALMA OBSERVATIONS OF HCN AND ITS ISOTOPOLOGUES ON TITAN |
| title_full_unstemmed | ALMA OBSERVATIONS OF HCN AND ITS ISOTOPOLOGUES ON TITAN |
| title_short | ALMA OBSERVATIONS OF HCN AND ITS ISOTOPOLOGUES ON TITAN |
| title_sort | alma observations of hcn and its isotopologues on titan |
| work_keys_str_mv | AT moltere almaobservationsofhcnanditsisotopologuesontitan AT nixonc almaobservationsofhcnanditsisotopologuesontitan AT cordinerm almaobservationsofhcnanditsisotopologuesontitan AT seriganoj almaobservationsofhcnanditsisotopologuesontitan AT irwinp almaobservationsofhcnanditsisotopologuesontitan AT teanbyn almaobservationsofhcnanditsisotopologuesontitan AT charnleys almaobservationsofhcnanditsisotopologuesontitan AT lindbergj almaobservationsofhcnanditsisotopologuesontitan |