2007ApJ...669..401J

Query : 2007ApJ...669..401J

2007ApJ...669..401J - Astrophys. J., 669, 401-411 (2007/November-1)

The variation of magnesium depletion with line-of-sight conditions.

JENSEN A.G. and SNOW T.P.

Abstract (from CDS):

In this paper we report on the gas-phase abundance of singly ionized magnesium (Mg II) in 44 lines of sight, using data from the Hubble Space Telescope (HST). We measure Mg II column densities by analyzing medium- and high-resolution archival Space Telescope Imaging Spectrograph (STIS) spectra of the 1240 Å doublet of Mg II. We find that Mg II depletion is correlated with many line-of-sight parameters [e.g., f(H2), EB–V, EB–V/r, AV, and AV/r] in addition to the well-known correlation with <nH>. These parameters should be more directly related to dust content and thus have more physical significance with regard to the depletion of elements such as magnesium. We examine the significance of these additional correlations as compared to the known correlation between Mg II depletion and <nH>. While none of the correlations are better predictors of Mg II depletion than <nH>, some are statistically significant even assuming fixed <nH>. We discuss the ranges over which these correlations are valid, their strength at fixed <nH>, and physical interpretations.

Abstract Copyright: ∼

Journal keyword(s): ISM: Abundances - Ultraviolet: ISM

Simbad objects: 47

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Number of rows : 47
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 HD 12323 SB* 02 02 30.1268458032 +55 37 26.372271540 7.95 8.87 8.92     ON9.2V 193 0
2 HD 13745 bC* 02 15 45.9350391312 +55 59 46.727495484 7.22 7.99 7.90     O9.7II(n) 183 1
3 HD 15137 SB* 02 27 59.8113542520 +52 32 57.589857672 7 7.92 7.86     O9.5II-IIIn 143 0
4 * 62 Tau * 04 23 59.7627483096 +24 18 03.527065188 6.18 6.499 6.337     B3V 237 0
5 * tet01 Ori B EB* 05 35 16.1339860056 -05 23 06.784444248 7.71 8.20 7.96     B1V 380 1
6 HD 37061 Or* 05 35 31.3649044920 -05 16 02.582064192 6.44 7.09 6.83     O9.5V 376 0
7 HD 37903 Em* 05 41 38.3891026008 -02 15 32.479650720 7.32 7.94 7.83 7.64 7.52 B3IV 385 0
8 HD 40893 * 06 03 06.4241745888 +31 03 08.230189176 8.28 9.05 8.99     B0IV: 64 0
9 HD 66788 * 08 04 08.5403348976 -27 29 08.860666488 8.44 9.92 9.83 9.85   O8/9(Ib) 64 0
10 HD 69106 * 08 14 03.7995306624 -36 57 07.938057852 6.12 7.020 7.128 8.02   O9.7IIn 129 0
11 HD 91597 Be* 10 33 01.1348834904 -60 50 41.730469044 8.95 10.01 9.92 9.87   B7/8IV/V 63 0
12 HD 91651 bC* 10 33 30.2993151816 -60 07 40.044178344 7.96 9.64 9.52 9.51   ON9.5IIIn 109 0
13 HD 92554 * 10 39 45.6466685664 -60 54 39.583812024 8.77 10.24 10.15 9.82   O9/B0 81 1
14 V* V560 Car SB* 10 44 33.7393258944 -59 44 15.434446956 6.89 7.80 7.75 7.56 7.46 O3.5V((f))+O8V 314 0
15 HD 93222 Y*O 10 44 36.2481200208 -60 05 28.890759120 7.26 8.18 8.10 8.91   O7V((f))z 212 0
16 V* V572 Car SB* 10 44 47.3048862456 -59 43 53.277923784 8.17 8.96 8.81 9.45   O7V+O9.5V+B0.2IV 182 0
17 HD 303308 ** 10 45 05.9147911152 -59 40 05.925360036 7.45 8.30 8.17 7.92 7.75 O4.5V((fc)) 314 0
18 HD 93843 Er* 10 48 37.7715351864 -60 13 25.518487656 6.37 7.29 7.33 8.23   O5III(fc) 184 0
19 HD 94493 s*b 10 53 15.0996282120 -60 48 53.198014608 6.43 7.75 7.59 8.17   B0.5Iab/b 105 0
20 HD 99857 * 11 28 27.1944074808 -66 29 21.368705316 6.81 7.57 7.49 8.63   B1Ib 88 0
21 HD 99890 * 11 29 05.7548771232 -56 38 39.319509156 7.31 9.62 9.26 9.17   B1IV 75 0
22 HD 103779 * 11 56 57.5476332144 -63 14 56.724069084 6.35 7.185 7.220 8.32   B0.5II 109 0
23 HD 104705 Pu* 12 03 23.9085250488 -62 41 45.832183224 6.94 9.56 9.11 8.85   B0III/IV 121 0
24 HD 109399 * 12 35 16.5316093632 -72 43 00.841795752 6.85 7.67 7.67 8.72   B0.5III 90 0
25 HD 116781 Be* 13 27 25.0583573641 -62 38 56.453486912 6.81 7.74 7.62     O9/B1(I)e 73 0
26 HD 122879 V* 14 06 25.1578487688 -59 42 57.254187024 5.90 6.64 6.50 6.33 6.18 B0Ia 182 1
27 HD 124314 ** 14 15 01.60615 -61 42 24.3831   8.96 6.64 6.45 6.31 O6V(n)((f)) 155 0
28 HD 147888 ** 16 25 24.2915998776 -23 27 36.747568152 6.71 7.05 6.74     B3V 228 0
29 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
30 V* V1297 Sco SB* 16 56 05.2157203176 -40 20 57.576260184 7.87 9.11 9.29 9.29   O7.5Vz 149 0
31 NAME Her 36SE Y*O 18 03 40.3201232304 -24 22 42.857540472 10.26 11.022 10.372 10.267   O8V+ 210 0
32 HD 168941 * 18 23 25.5605003784 -26 57 10.844087076 8.53 9.36 9.37 9.81   O9.5IVp 107 0
33 HD 177989 * 19 07 37.7606351568 -18 43 34.505685552 8.39 9.22 9.34     B2II 101 0
34 HD 185418 * 19 38 27.4809937872 +17 15 26.048161044 7 7.639 7.485     B0.5V 144 0
35 HD 192639 s*b 20 14 30.4275801672 +37 21 13.816276704 6.83 7.46 7.11     O7.5Iabf 309 0
36 HD 195965 * 20 32 25.5891987312 +48 12 59.317612308 6.03 6.899 6.974     B0.2Vn 119 0
37 BD+35 4258 bC? 20 46 12.659 +35 32 25.59 8.68 9.43 9.46 9.57   B0.5Vn 57 0
38 HD 202347 * 21 13 41.8579953000 +45 36 41.264109504 6.6 7.41 7.50     B1V 76 0
39 HD 203374 Be* 21 19 07.3685524992 +61 51 30.436799148 6.23 6.908 6.674     B0IVpe 135 0
40 HD 206267 Y*O 21 38 57.6195772032 +57 29 20.554016280 5.09 5.83 5.62   5.56 O6.0V((f))+O9:V 520 0
41 HD 207198 Y*? 21 44 53.2791389640 +62 27 38.048647248 5.61 6.25 5.94 5.66 5.49 O8.5II 365 0
42 HD 207308 * 21 45 42.3669566232 +62 18 30.021766056 7.11 7.74 7.49     B0.5V 73 0
43 HD 207538 * 21 47 39.7896725544 +59 42 01.348647696 7 7.55 7.30     O9.7IV 213 1
44 HD 209339 ** 22 00 39.2649125112 +62 29 16.063886004 5.9 8.73 8.51 7.61   O9.7IV 196 0
45 HD 210121 * 22 08 11.9027578440 -03 31 52.765490316   7.84 7.68     B7II 185 0
46 * lam Cep s*b 22 11 30.5765111040 +59 24 52.154264880 4.55 5.29 5.05 4.77 4.62 O6.5I(n)fp 705 1
47 V* V373 Cas SB* 23 55 33.8386958472 +57 24 43.807358448 5.49 6.21 6.00     B0.5II+B3.5/4III/V 157 0

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