Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-04-06
Astrophys.J. 628 (2005) 750-757
Astronomy and Astrophysics
Astrophysics
7 pages, 6 figures, using emulateapj. Accepted by ApJ
Scientific paper
10.1086/430878
We present far-ultraviolet observations of IC 63, an emission/reflection nebula illuminated by the B0.5IV star gamma Cassiopeia, located 1.3 pc from the nebula. Molecular hydrogen fluorescence was detected first in IC 63 by IUE and later at shorter wavelengths by ORFEUS. Here we present Far Ultraviolet Spectroscopic Explorer (FUSE) observations towards three locations in the nebula, complemented by Hopkins Ultraviolet Telescope (HUT) data on the central nebular position. In addition, we present a sounding rocket calibration of a FUSE spectrum of gamma Cas. Molecular hydrogen fluorescence is detected in all three FUSE pointings. The intensity of this emission as well as the contributions from other species are seen to vary with position. The absolute flux calibration of the sounding rocket data allows us to reliably predict the radiation field incident on IC 63. We use these data to test models of the fluorescent process. Our modeling resolves the perceived discrepancy between the existing ultraviolet observations and achieves a satisfactory agreement with the H_2 rotational structure observed with FUSE.
Andersson Bengt-Goran
Feldman Paul D.
France Kevin
McCandliss Stephan R.
No associations
LandOfFree
Fluorescent Molecular Hydrogen Emission in IC 63: FUSE, HUT, and Rocket Observations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Fluorescent Molecular Hydrogen Emission in IC 63: FUSE, HUT, and Rocket Observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fluorescent Molecular Hydrogen Emission in IC 63: FUSE, HUT, and Rocket Observations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-363222