TY - JOUR
T1 - A reanalysis of the carbon abundance in the translucent cloud toward HD 245341
AU - Sofia, Ulysses J.
AU - Fitzpatrick, Edward L.
AU - Meyer, David M.
N1 - Funding Information:
U. J. S. acknowledges support from the HST grant GO-06542.01-95A and the NASA LTSARP grant NAG5-3539 through Villanova University.
PY - 1998
Y1 - 1998
N2 - 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
AB - 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
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U2 - 10.1086/311566
DO - 10.1086/311566
M3 - Article
AN - SCOPUS:22044440582
VL - 504
SP - L47-L49
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 1 PART II
ER -