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Near-IR Fluorescent Molecular Hydrogen Emission from NGC 2023

Published online by Cambridge University Press:  05 March 2013

Michael G. Burton
Affiliation:
School of Physics, University of New South Wales, Sydney, NSW 2052, Australia; [email protected]
J. E. Howe
Affiliation:
Five College Radio Astronomy Observatory, Department of Physics and Astronomy, University of Massachusetts, Amherst, MA 01003, USA; [email protected]
T. R. Geballe
Affiliation:
Joint Astronomy Centre, 660 N. A'ohoku Place, Hilo, HI 96720, USA; [email protected]
P. W. J. L. Brand
Affiliation:
Institute for Astronomy, University of Edinburgh, Blackford Hill, Edinburgh, EH9 3HJ, UK; [email protected]
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Abstract

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Spectra from 1 to 2·5 μm, at 230–430 spectral resolution, are presented of the fluorescent molecular hydrogen line emission from two locations in the reflection nebula NGC 2023. Over 100 H2 lines can be identified in the spectra, although blending and poor atmospheric transmission mean that reliable level column densities can only be obtained from 35 lines. This latter group includes lines from v = 1–8 and v = 10, spanning an energy range from 6000 to 45,000 K above the ground state. These data may be used to constrain models of photodissociation regions and of fluorescent excitation for molecular hydrogen.

Type
Research Article
Copyright
Copyright © Astronomical Society of Australia 1998

References

Black, J. H., & Dalgarno, A. 1976, ApJ, 203, 132 CrossRefGoogle Scholar
Black, J. H., & van Dishoeck, E. F. 1987, ApJ, 322, 412 CrossRefGoogle Scholar
Burton, M. G. 1992, Aust. J. Phys., 45, 463 Google Scholar
Burton, M. G., Bulmer, M., Moorhouse, A., Geballe, T. R., & Brand, P. W. J. L. 1992, MNRAS, 257, 1P CrossRefGoogle Scholar
Burton, M. G., Geballe, T. R., Brand, P. W. J. L., & Moorhouse, A. 1990a, ApJ, 352, 625 CrossRefGoogle Scholar
Burton, M. G., Hollenbach, D. J., & Tielens, A. G. G. M. 1990b, ApJ, 365, 620 CrossRefGoogle Scholar
Burton, M. G., Moorhouse, A., Brand, P. W. J. L., Roche, P. F., & Geballe, T. R. 1989, in Interstellar Dust: Contributed Papers, IAU Symp. No. 135, NASA CP–3036, 87, ed. L. J. Allamandolla & A. G. G. M. TielensGoogle Scholar
Dabrowski, I. 1984, Can. J. Phys., 62, 1639 CrossRefGoogle Scholar
DePoy, D. L., Lada, E. A., Gatley, I., & Probst, R. 1990, ApJ, 356, L55 CrossRefGoogle Scholar
Draine, B. T., & Bertoldi, F. 1996, ApJ, 468, 269 CrossRefGoogle Scholar
Field, D., Gerin, M., Leach, S., Lemaire, J. L., Pineau des Forets, G., Rostas, F., Rouan, D., & Simons, D. 1994, A&A, 286, 909 Google Scholar
Gatley, I., Hasegawa, T., Suzuki, H., Garden, R., Brand, P., Lightfoot, J., Glencross, W., Okuda, H., & Nagata, T. 1987, ApJ, 318, L73 CrossRefGoogle Scholar
Habing, H. J. 1968, Bull. Astron. Inst. Neth., 19, 421 Google Scholar
Hasegawa, T., Gatley, I., Garden, R. P., Brand, P. W. J. L., Ohishi, M., Hayashi, M., & Kaifu, N. 1987, ApJ, 318, L77 CrossRefGoogle Scholar
Howe, J. E. 1992, PhD Dissertation, University of TexasGoogle Scholar
Howe, J. E., Jaffe, D. T., Genzel, R., & Stacey, G. J. 1991, ApJ, 373, 158 CrossRefGoogle Scholar
Jaffe, D. T., Genzel, R., Harris, A. I., Howe, J. E., Stacey, G. J., & Stutzki, J. 1990, ApJ, 353, 193 CrossRefGoogle Scholar
Joblin, C., Tielens, A. G. G. M., Allamandolla, L. J., & Geballe, T. R. 1996, ApJ, 458, 610 CrossRefGoogle Scholar
Kurucz, R. L., Peytremann, E., & Avrett, E. H. 1974, Blanketed Model Atmospheres for Early-type Stars (Washington: Smithsonian Institution) Near-IR Fluorescent Molecular Hydrogen Emission 201 Google Scholar
McCartney, M. 1998, PhD Dissertation, University of EdinburghGoogle Scholar
Oke, J. B., & Schild, R. E. 1970, ApJ, 161, 1015 CrossRefGoogle Scholar
Steiman-Cameron, T. Y., Haas, M. R., Tielens, A. G. G. M., & Burton, M. G. 1997, ApJ, 478, 261 CrossRefGoogle Scholar
Sternberg, A., & Dalgarno, A. 1989, ApJ, 338, 197 CrossRefGoogle Scholar
Tielens, A. G. G. M., & Hollenbach, D. 1985, ApJ, 291, 722 CrossRefGoogle Scholar
Turner, J., Kirby-Docken, K., & Dalgarno, A. 1977, ApJS, 35, 281 CrossRefGoogle Scholar
Witt, A. N., & Malin, D. F. 1989, ApJ, 347, L25 CrossRefGoogle Scholar
Wyrowski, F., Walmsley, C. M., Natta, A., & Tielens, A. G. G. M. 1997, A&A, 324, 1135 Google Scholar