Abstract
We have reanalyzed the Goddard High Resolution Spectrograph data set presented by Snow et al., which contains the interstellar intersystem C n] X2325 line through the translucent cloud toward HD 24534 (X Persei). In contrast to the results of Snow et al., we clearly detect the C II] feature at the 3 a confidence level and measure a C+ column density of 2.7 ± 0.8 × 1017 cm-2. Accounting for the C I column density along the line of sight, we find 106 C/H = 106 ± 38 in the interstellar gas toward this star. This gas-phase carbon-to-hydrogen ratio suggests that slightly more carbon depletion may be occurring in translucent as compared to diffuse clouds. The average diffuse-cloud C/H, however, is within the 1 a uncertainty of the measurement toward HD 24534. We therefore cannot rule out the possibility that the two cloud types have comparable gas-phase C/H and therefore comparable depletions of carbon. Subject headings: dust, extinction - ISM: abundances - ultraviolet: ISM
| Original language | English (US) |
|---|---|
| Pages (from-to) | L47-L49 |
| Journal | Astrophysical Journal |
| Volume | 504 |
| Issue number | 1 PART II |
| DOIs | |
| State | Published - 1998 |
Funding
U. J. S. acknowledges support from the HST grant GO-06542.01-95A and the NASA LTSARP grant NAG5-3539 through Villanova University.
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science