Abstract
THE first detection of H2 in the Sun, in extreme ultraviolet spectra, is reported Here. The Naval Research Laboratory's High Resolution Telescope and Spectrograph (HRTS), flown in a rocket on 21 July 1975, was used for these observations. The slit extended from Sun centre to limb and crossed a sunspot at 07° S, 23° W in McMath region 13766. This stigmatic spectrograph, described by Bartoe and Brueckner1, covered 1,175–1,714 Å with 0.06 Å spectral and 1.5 arc s spatial resolution. A full list of observed lines is in preparation2. The sunspot spectrum contains some 120 emission lines which do not correspond to known lines listed in compilations3 of transitions in atoms or ions, apart from random coincidences. More recent publications referred to in the NBS Bibliography4 were also consulted. The identifications of the lines which are enhanced in the sunspot spectrum will be discussed elsewhere5.
Similar content being viewed by others
References
Bartoe, J.-D. F. & Brueckner, G. E. J. opt. Soc. Am. 65, 13–21 (1975).
Sandlin, G. D., Bartoe, J.-D. F., Brueckner, G. E., Van Hoosier, M. E. Astrophys. J. Suppl. Ser. (to be submitted).
Kelly, R. L. & Palumbo, L. J. NRL Rep. 7599 (1973).
Hagan, L. NBS Spec. Publ., 363. Suppl. 1 (1977).
Jordan, C., Brueckner, G. E., Bartoe, J.-D. F., Sandlin, G. D. & Van Hoosier, M. E. Astrophys. J. (to be submitted).
Allen, C. W. Astrophysical Quantities 3rd edn, 185 (Athlone, London, 1973).
Herzberg, G. & Howe, L. L. Can. J. Phys. 37, 636–659 (1959).
Wood, R. W. Phil. Mag. 12, 499–522 (1906).
Wood, R. W. & Hackett, F. E. Astrophys. J. 30, 330–372 (1909).
Herzberg, G. Spectra of Diatomic Molecules (Van Nostrand, Princeton, 1950).
Allison, A. C. & Dalgarno, A. Atomic Data 1, 289–304 (1970).
Osterbrock, D. E. Astrophys. J. 136, 359–364 (1962).
Black, J. H. & Dalgarno, A. Bull. Am. astr. Soc. 6, 444 (1974).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
JORDAN, C., BRUECKNER, G., BARTOE, JD. et al. Lines of H2 in extreme-ultraviolet solar spectra. Nature 270, 326–327 (1977). https://doi.org/10.1038/270326a0
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1038/270326a0
- Springer Nature Limited
This article is cited by
-
Atomic processes in astrophysics
Astrophysics and Space Science (1996)
-
Spectral studies of molecules of astrophysical interest
Astrophysics and Space Science (1988)
-
The solar minimum temperature determined by the CO (A 1?-X 1?)
Astrophysics and Space Science (1985)
-
Are plasma satellites present among chromospheric lines?
Solar Physics (1983)
-
H2 emission in the EUV spectrum of T Tauri and Burnham's nebula
Nature (1981)