A low fraction of nitrogen in molecular form in a dark cloud

Nature

Volumn 442, Issue 7101, 2006, Pages 425-427

  Maret, S ^a   Bergin, E A ^a   Lada, C J ^b  

^a UNIVERSITY OF MICHIGAN   (United States)

^b HARVARD SMITHSONIAN CENTER FOR ASTROPHYSICS   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

COMPOSITION; DUST; ISOTOPES; METEORITES; MOLECULAR VIBRATIONS; MOLECULES;

GAS PHASE; INTERSTELLAR DUST PARTICLES; MOLECULAR NITROGEN; NITROGEN FRACTIONATION;

NITROGEN;

AMINE; NITROGEN;

ANOMALY; COMET; COSMOCHEMISTRY; METEORITE; NITROGEN;

ARTICLE; ASTRONOMY; ATOM; CHEMICAL COMPOSITION; CHEMICAL MODEL; COLD; COSMOLOGICAL PHENOMENA; COSMOS; DARK CLOUD; GAS; MOLECULE; PREDICTION; PRIORITY JOURNAL;

EID: 33747622138     PISSN: 00280836     EISSN: 14764687     Source Type: Journal    
DOI: 10.1038/nature04919     Document Type: Article

References (25)

1. Herbst, E. & Klemperer, W. The formation and depletion of molecules in dense interstellar clouds. Astrophys. J. 185, 505-534 (1973).
2. + in Comets 122P/1995 S1 (deVico) and C/1995 O1 (Hale-Bopp). Icarus 146, 583-593 (2000).
3. Iro, N., Gautier, D., Hersant, F., Bockelée-Morvan, D. & Lunine, J. I. An interpretation of the nitrogen deficiency in comets. Icarus 161, 511-532 (2003).
4. 15N-rich IDPs. Meteorit. Planet. Sci. 31, A88 (1996).
5. Irvine, W. M., Schloerb, F. P., Crovisier, J., Fegley, B. & Mumma, M. J. Comets: a link between interstellar and nebular chemistry. Protostars Planets IV, 1159-1200 (2000).
6. Charnley, S. B. & Rodgers, S. D. The end of interstellar chemistry as the origin of nitrogen in comets and meteorites. Astrophys. J. Lett. 569, L133-L137 (2002).
7. + in interstellar clouds. Astrophys. J. Lett. 271, L85-L88 (1983).
8. Tafalla, M., Myers, P. C., Caselli, P., Walmsley, C. M. & Comito, C. Systematic molecular differentiation in starless cores. Astrophys. J. 569, 815-835 (2002).
9. 18O depletion in a cold dark cloud. Astrophys. J. Lett. 570, L101-L104 (2002).
10. Pagani, L., Pardo, J.-R., Apponi, A. J., Bacmann, A. & Cabrit, S. L183 (L134N) revisited. III. The gas depletion. Astron. Astrophys. 429, 181-192 (2005).
11. 2 desorption from interstellar ices. Astrophys. J. Lett. 621, L33-L36 (2005).
12. +: Evidence for fracture of the NN bond. Astrophys. J. 609, 459-464 (2004).
13. Bergin, E. A., Langer, W. D. & Goldsmith, P. F. Gas-phase chemistry in dense interstellar clouds including grain surface molecular depletion and desorption. Astrophys. J. 441, 222-243 (1995).
14. Alves, J. F., Lada, C. J. & Lada, E. A. Internal structure of a cold dark molecular cloud inferred from the extinction of background starlight. Nature 409, 159-161 (2001).
15. Bergin, E. A. et al. The thermal structure of gas in pre-stellar cores: a case study of Barnard 68. Astrophys. J. (in the press).
16. Caselli, P., Walmsley, C. M., Terzieva, R. & Herbst, E. The ionization fraction in dense cloud cores. Astrophys. J. 499, 234-249 (1998).
17. Caselli, P. et al. Molecular ions in L1544. II. The ionization degree. Astrophys. J. 565, 344-358 (2002).
18. 2 abundances in dense molecular clouds. Astrophys. J. 393, 188-192 (1992).
19. Bockelée-Morvan, D. et al. New molecules found in comet C/1995 O1 (Hale-Bopp). Investigating the link between cometary and interstellar material. Astron. Astrophys. 353, 1101-1114 (2000).
20. Wyckoff, S., Tegler, S. C. & Engel, L. Nitrogen abundance in comet Halley. Astrophys. J. 367, 641-648 (1991).
21. Gibb, E. L., Whittet, D. C. B., Boogert, A. C. A. & Tielens, A. G. G. M. Interstellar ice: the Infrared Space Observatory legacy. Astrophys. J. Suppl. 151, 35-73 (2004).
22. Terzieva, R. & Herbst, E. The possibility of nitrogen isotopic fractionation in interstellar clouds. Mon. Not. R. Astron. Soc. 317, 563-568 (2000).
23. 2 abundance towards HD 124314 from far-ultraviolet observations. Nature 429, 636-638 (2004).
24. +. Astrophys. J. Lett. 455, L77-L80 (1995).
25. Keto, E., Rybicki, G. B., Bergin, E. A. & Plume, R. Radiative transfer and starless cores. Astrophys. J. 613, 355-373 (2004).