2008ApJ...687.1043C

Query : 2008ApJ...687.1043C

2008ApJ...687.1043C - Astrophys. J., 687, 1043-1053 (2008/November-2)

Interstellar krypton abundances: the detection of kiloparsec-scale differences in galactic nucleosynthetic history.

CARTLEDGE S.I.B., LAUROESCH J.T., MEYER D.M., SOFIA U.J. and CLAYTON G.C.

Abstract (from CDS):

We present an analysis of Kr I λ1236 line measurements from 50 sight lines in the Hubble Space Telescope Space Telescope Imaging Spectrograph and Goddard High Resolution Spectrograph data archives that have sufficiently high resolution and signal-to-noise ratio to permit reliable krypton-to-hydrogen abundance ratio determinations. The distribution of Kr/H ratios in this sample is consistent with a single value for the ISM within 5900 pc of the Sun, log10(Kr/H)=-9.02±0.02, apart from a rough annulus from between ∼600 and 2500 pc distant. The Kr/H ratio toward stars within this annulus is elevated by approximately 0.11 dex, similar to previously noted elevations of O/H and Cu/H gas-phase abundances beyond ∼800 pc. A significant drop in the gas-phase N/O ratio in the same region suggests that this is an artifact of nucleosynthetic history. Since the physical scale of the annulus' inner edge is comparable to the radius of the Gould Belt and the outer limit of heliocentric distances where the D/H abundance ratio is highly variable, these phenomena may be related to the Gould Belt's origins.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: Abundances - 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 3827 * 00 41 12.1630838496 +39 36 13.712288400 6.73 7.76 7.95     B0.7V((n)) 62 0
2 HD 23478 Be* 03 46 40.8712236312 +32 17 24.675566784 6.17 6.708 6.671     B3IV 168 0
3 HD 24190 SB* 03 52 18.9579628248 +34 13 19.612811028 6.84 7.46 7.45     B2V 106 0
4 HD 36408B Be* 05 32 14.5668537096 +17 03 21.779554248 6.337 6.527 6.490 6.410 6.437 B8V 21 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 37367 * 05 39 18.3135535104 +29 12 54.788852916 5.6 6.116 5.984     B2IV-V 141 0
8 HD 40893 * 06 03 06.4241745888 +31 03 08.230189176 8.28 9.05 8.99     B0IV: 64 0
9 HD 69106 * 08 14 03.7995306624 -36 57 07.938057852 6.12 7.020 7.128 8.02   O9.7IIn 129 0
10 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
11 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
12 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
13 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
14 HD 94454 * 10 51 30.2718819000 -75 52 57.953647452   6.77 6.69     B8III 40 0
15 HD 99872 ** 11 28 18.41395 -72 28 26.3265 5.83 6.221 6.115     B3V 85 0
16 HD 99857 * 11 28 27.1944074808 -66 29 21.368705316 6.81 7.57 7.49 8.63   B1Ib 88 0
17 HD 102065 Y*O 11 43 36.9451657872 -80 29 00.511110852   6.67 6.61     B9IV 69 0
18 HD 104705 Pu* 12 03 23.9085250488 -62 41 45.832183224 6.94 9.56 9.11 8.85   B0III/IV 121 0
19 HD 108639 * 12 29 09.5168765256 -60 48 17.541197892 7.09 8.74 8.57 8.76   B1III 68 0
20 HD 112999 Be* 13 01 34.8962893200 -60 40 16.996296288 7 7.414 7.383     B6V 51 0
21 HD 114886 ** 13 14 44.38260 -63 34 51.8077 6.15 6.98 6.89 7.76   O9-B0V 114 0
22 V* V961 Cen SB* 13 16 04.8010592232 -62 35 01.490795556 7.51 9.16 9.32 8.82   O9.5III+B0Ib 111 0
23 HD 116852 * 13 30 23.5185791544 -78 51 20.547734652 8.29 8.38 8.47     O8.5II-III((f)) 163 1
24 HD 121968 * 13 58 51.1663111056 -02 54 52.325640252 9.160 10.071 10.256 10.330 10.429 B2II 112 0
25 HD 122879 V* 14 06 25.1578487688 -59 42 57.254187024 5.90 6.64 6.50 6.33 6.18 B0Ia 182 1
26 HD 124314 ** 14 15 01.60615 -61 42 24.3831   8.96 6.64 6.45 6.31 O6V(n)((f)) 155 0
27 HD 137595 PM* 15 28 02.2701731592 -33 32 42.874121688 6.78 7.52 7.49     B2II/III 47 0
28 HD 144965 Be* 16 10 10.5557672592 -40 07 43.767402492 6.71 7.206 7.114     B3Vne 70 0
29 * sig Sco bC* 16 21 11.3157134 -25 35 34.051476 2.32 3.02 2.89 1.69 1.58 B1III+B1:V 898 0
30 V* V760 Sco SB* 16 24 43.7182304928 -34 53 37.529154204   7.16 7.05     B4V 176 0
31 * zet Oph Be* 16 37 09.5400587698 -10 34 01.509742704 1.73 2.58 2.56 2.46 2.50 O9.2IVnn 1908 0
32 HD 151805 Y*? 16 51 35.7118253472 -41 46 35.556351744 8.27 8.99 8.86 9.56   B1Ib 63 0
33 V* V1297 Sco SB* 16 56 05.2157203176 -40 20 57.576260184 7.87 9.11 9.29 9.29   O7.5Vz 149 0
34 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
35 HD 165246 SB* 18 06 04.6792554840 -24 11 43.890335448 6.90 7.70 7.60 8.77   O8V(n) 93 0
36 HD 168941 * 18 23 25.5605003784 -26 57 10.844087076 8.53 9.36 9.37 9.81   O9.5IVp 107 0
37 NAME Sgr Arm PoG 19 00 -30.0           ~ 710 1
38 HD 177989 * 19 07 37.7606351568 -18 43 34.505685552 8.39 9.22 9.34     B2II 101 0
39 HD 202347 * 21 13 41.8579953000 +45 36 41.264109504 6.6 7.41 7.50     B1V 76 0
40 HD 203374 Be* 21 19 07.3685524992 +61 51 30.436799148 6.23 6.908 6.674     B0IVpe 135 0
41 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
42 HD 208947 SB* 21 57 11.1009923376 +66 09 22.155335100 5.65 6.337 6.394     B2V 102 0
43 HD 209339 ** 22 00 39.2649125112 +62 29 16.063886004 5.9 8.73 8.51 7.61   O9.7IV 196 0
44 HD 218915 s*b 23 11 06.9483955128 +53 03 29.652921252 6.32 7.22 7.20     O9.2Iab 206 1
45 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
46 NAME Local Arm reg ~ ~           ~ 649 0
47 NAME Gould Belt PoG ~ ~           ~ 956 1

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