High-resolution spectroscopy of the C2 Swan 0-0 band from Comet P/Halley

in Astrophysical Journal (1990), 353

High-resolution spectra of the C2 Swan system's 0-0 band from Comet P/Halley in March 1986 show that the populations of the upper state's rotational levels may be described by two rotational temperatures ... [more ▼]

High-resolution spectra of the C2 Swan system's 0-0 band from Comet P/Halley in March 1986 show that the populations of the upper state's rotational levels may be described by two rotational temperatures. The low rotational levels provide a low temperature, Trot = about 600 - 700 K. The higher levels correspond to about 3200 K. If a contribution from the 3200-K molecules is subtracted from the populations of the low-J-prime levels, the latter are characterized by Trot = about 190 K. A comparison with recent predictions for C2 molecules fluorescing in sunlight shows that the observed and predicted level populations are in good agreement for J-prime greater than about 15, but there is a sharp disagreement for the low rotational levels. [less ▲]

High Resolution Spectroscopy and Analysis of the C[SUB]2[/SUB](0,0) Band in Comet P/Halley

in Bulletin of the American Astronomical Society (1987, September 01)

Not Available

Spectroscopy, photometry and direct filter imagery of Comet P/Halley

in The Messenger (1986), 45

Observational techniques and instrumentation applied in ground-based studies of the cometary coma during the post-perihelion phase of the recent passage of Comet Halley are summarized. Applications of a 1 ... [more ▼]

Observational techniques and instrumentation applied in ground-based studies of the cometary coma during the post-perihelion phase of the recent passage of Comet Halley are summarized. Applications of a 1.5 m telescope equipped with a coude spectrograph for long slit investigations of spectral intensity distributions, a 1.4 m CAT, coude echelle spectrometer and reticon to evaluate the C-12/C-13 isotopic abundance ratio, and a 50 cm photometric telescope for narrow bandwidth spectroscopy are described. Finally, the 1.5 m Danish telescope, equipped with a CCD camera, collected high spatial resolution photographs of the various coma components when the comet was 0.42 AU from the sun. [less ▲]

A bright rim in RCW 62.

in Astronomy and Astrophysics (1976), 48

Abstract image available at: http://cdsads.u-strasbg.fr/abs/1976A&A....48..213D

The Bright Rim IC2948

in Southwest Regional Conference for Astronomy and Astrophysics (1976)

Not Available