Herschel/HIFI discovery of interstellar chloronium (H2Cl+)

  title={Herschel/HIFI discovery of interstellar chloronium (H2Cl+)},
  author={Dariusz C. Lis and Justin Pearson and David A. Neufeld and Peter Schilke and Holger S. P. Muller and H. Gupta and Tom A. Bell and Claudia Comito and Thomas G. Phillips and Edwin A. Bergin and Cecilia Ceccarelli and Paul F. Goldsmith and Geoffrey A. Blake and Aurore Bacmann and Alain Baudry and Milena Benedettini and A. Benz and Jennifer Black and Adwin Boogert and Sandrine Bottinelli and Sylvie Cabrit and P. Caselli and Alain Castets and Emmanuel Caux and Jos{\'e} Cernicharo and Claudio Codella and Audrey Coutens and Nicolas Crimier and Nathan R. Crockett and F. Daniel and Karine Demyk and C. Dominic and M.-L. Dubernet and Martin Emprechtinger and Pierre Encrenaz and Edith Falgarone and Asunci{\'o}n Fuente and M. Gerin and Thomas F. Giesen and Javier R. Goicoechea and F. Helmich and Patrick Hennebelle and Th. Henning and Eric Herbst and Pierre Hily-Blant and Aa. Hjalmarson and David J. Hollenbach and Trevor Jack and Christine Joblin and Doug Johnstone and Claudine Kahane and Mihkel Kama and Michele Kaufman and Alain Klotz and W. D. Langer and B. Larsson and Jacques Le Bourlot and Bertrand Lefloch and Franck Le Petit and Dong-guo Li and R. Liseau and Steven Lord and Andrea Lorenzani and S'ebastien Maret and P. G. Martin and Gary J. Melnick and Karl M. Menten and P. Morris and J. Anthony Murphy and Zolt'an Nagy and Brunella Nisini and V. Ossenkopf and Sylvia Pacheco and Laurent Pagani and Berengere Parise and Michel P{\'e}rault and Ren'e Plume and S.-L. Qin and {\`E}velyne Roueff and Morvan C. Salez and Aa. Sandqvist and Paolo Saraceno and Stephan Schlemmer and K. Schuster and Rick Snell and Jurgen Stutzki and A. Tielens and Neil Trappe and Floris van der Tak and M. van der Wiel and E. van Dishoeck and Charlotte Vastel and Serena Viti and Valentine Wakelam and A. Walters and S. Wang and Friedrich Wyrowski and Harold W. Yorke and S. H. Yu and Jonas Zmuidzinas and Y. Delorme and J. Desbat and Rolf Gusten and J.-M. Krieg and Bertrand Delforge},
  • Dariusz C. Lis, Justin Pearson, +102 authors Bertrand Delforge
  • Published 2010
  • Physics
  • We report the first detection of chloronium, H2Cl+, in the interstellar medium, using the HIFI instrument aboard the Herschel Space Observatory. The 212-101 lines of ortho-H_235Cl+ and ortho-H_237Cl+ are detected in absorption towards NGC 6334I, and the 111-000 transition of para-H_235Cl+ is detected in absorption towards NGC 6334I and Sgr B2(S). The H2Cl+ column densities are compared to those of the chemically-related species HCl. The derived HCl/H2Cl+ column density ratios, ~1-10, are within… CONTINUE READING

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    Frequencies and spontaneous emission coe ffi ients have been calculated from the constants derived by Araki et al

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