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Deuterium and oxygen toward feige 110: results from the far ultraviolet spectroscopic explorer (fuse) mission
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Chayer, P. Andre, M. Howk, J. C. Friedman, S. D. Moos, H. W. Oliveira, C. Oegerle, William R. Tripp, T. M. Jenkins, E. B. Hebrard, G. |
| Copyright Year | 2001 |
| Description | We present measurements of the column densities of interstellar D I and O I made with the Far Ultraviolet Spectroscopic Explorer (FUSE), and of H I made with the International Ultraviolet Explorer (IUE) toward the sdOB star Feige 110 [(l,b) = (74.09 deg., - 59.07 deg.); d = 179(sup +265, sub -67) pc; Z = -154(sup +57, Sub -227 pc). Our determination of the D I column density made use of curve of growth fitting and profile fitting analyses, while our O I column density determination used only curve of growth techniques. The H I column density was estimated by fitting the damping wings of the interstellar Ly(lpha) profile. We find log N(D I) = 15.47 +/- 0.06, log N(O I) = 16.73 +/- 0.10, and log N(H I) = 20.14(sup +0.13, sub -0.20) (all errors 2(sigma)). This implies D/H = (2.14 +/- 0.82) x 10(esp -5), D/O = (5.50(sup + 1.64, sub -133)) x 10(exp -2), and O/H = (3.89 +/- 1.67) x 10(exp -4). Taken with the FUSE results reported in companion papers and previous measurements of the local interstellar medium, this suggests the possibility of spatial variability in D/H for sight lines exceeding approx. 100 pc. This result may constrain models which characterize the mixing time and length scales of material in the local interstellar medium. |
| File Size | 1239741 |
| Page Count | 24 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20020066438 |
| Archival Resource Key | ark:/13960/t2t48nb6f |
| Language | English |
| Publisher Date | 2001-01-01 |
| Access Restriction | Open |
| Subject Keyword | Geophysics Damping Deuterium Errors Oxygen Density Measurement Variability Mixing Length Flow Theory Estimating Far Uv Spectroscopic Explorer Curve Fitting Interstellar Matter Visual Perception Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
