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 - 2024 		#notes
1 HD 3827 * 00 41 12.1630838496 +39 36 13.712288400 6.73 7.76 7.95     B0.7V((n)) 57 0
2 HD 23478 Be* 03 46 40.8712236312 +32 17 24.675566784 6.17 6.708 6.671     B3IV 153 0
3 HD 24190 SB* 03 52 18.9579628248 +34 13 19.612811028 6.84 7.46 7.45     B2V 96 0
4 HD 36408B Be* 05 32 14.5668537096 +17 03 21.779554248 6.337 6.527 6.490 6.410 6.437 B8V 18 0
5 * tet01 Ori B EB* 05 35 16.1339860056 -05 23 06.784444248 7.71 8.20 7.96     B1V 367 2
6 HD 37061 Or* 05 35 31.3649044920 -05 16 02.582064192 6.44 7.09 6.83     O9.5V 355 0
7 HD 37367 * 05 39 18.3135535104 +29 12 54.788852916 5.6 6.116 5.984     B2IV-V 133 0
8 HD 40893 * 06 03 06.4241745888 +31 03 08.230189176 8.28 9.05 8.99     B0IV: 59 0
9 HD 69106 * 08 14 03.7995306624 -36 57 07.938057852 6.12 7.020 7.128 8.02   O9.7IIn 121 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 301 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 198 0
12 V* V572 Car EB* 10 44 47.3048862456 -59 43 53.277923784 8.17 8.96 8.81 9.45   O7.5V(n)z+B0V(n) 172 1
13 HD 303308 ** 10 45 05.9147911152 -59 40 05.925360036 7.45 8.30 8.17 7.92 7.75 O4.5V((fc)) 300 0
14 HD 94454 * 10 51 30.2718819000 -75 52 57.953647452   6.77 6.69     B8III 36 0
15 HD 99872 ** 11 28 18.41395 -72 28 26.3265 5.83 6.221 6.115     B3V 81 0
16 HD 99857 * 11 28 27.1944074808 -66 29 21.368705316 6.81 7.57 7.49 8.63   B1Ib 82 0
17 HD 102065 Y*O 11 43 36.9451657872 -80 29 00.511110852   6.67 6.61     B9IV 65 0
18 HD 104705 Pu* 12 03 23.9085250488 -62 41 45.832183224 6.94 9.56 9.11 8.85   B0III/IV 115 0
19 HD 108639 * 12 29 09.5168765256 -60 48 17.541197892 7.09 8.74 8.57 8.76   B1III 64 0
20 HD 112999 Be* 13 01 34.8962893200 -60 40 16.996296288 7 7.414 7.383     B6V 46 0
21 HD 114886 ** 13 14 44.38260 -63 34 51.8077 6.15 6.98 6.89 7.76   O9-B0V 105 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 103 1
23 HD 116852 * 13 30 23.5185791544 -78 51 20.547734652 8.29 8.38 8.47     O8.5II-III((f)) 151 1
24 HD 121968 * 13 58 51.1663111056 -02 54 52.325640252 9.160 10.071 10.256 10.330 10.429 B2II 108 0
25 HD 122879 V* 14 06 25.1578487688 -59 42 57.254187024 5.90 6.64 6.50 6.33 6.18 B0Ia 174 1
26 HD 124314 ** 14 15 01.60615 -61 42 24.3831   8.96 6.64 6.45 6.31 O6V(n)((f)) 148 0
27 HD 137595 PM* 15 28 02.2701731592 -33 32 42.874121688 6.78 7.52 7.49     B2II/III 43 0
28 HD 144965 Be* 16 10 10.5557672592 -40 07 43.767402492 6.71 7.206 7.114     B3Vne 65 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 870 0
30 V* V760 Sco EB* 16 24 43.7182304928 -34 53 37.529154204   7.16 7.05     B4V 168 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 1839 0
32 HD 151805 Y*? 16 51 35.7118253472 -41 46 35.556351744 8.27 8.99 8.86 9.56   B1Ib 59 0
33 V* V1297 Sco SB* 16 56 05.2157203176 -40 20 57.576260184 7.87 9.11 9.29 9.29   O7.5Vz 138 0
34 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14419 0
35 HD 165246 ** 18 06 04.6792554840 -24 11 43.890335448 6.90 7.70 7.60 8.77   O8V(n) 84 0
36 HD 168941 * 18 23 25.5605003784 -26 57 10.844087076 8.53 9.36 9.37 9.81   O9.5IVp 102 0
37 NAME Sgr Arm PoG 19 00 -30.0           ~ 637 1
38 HD 177989 * 19 07 37.7606351568 -18 43 34.505685552 8.39 9.22 9.34     B2II 96 0
39 HD 202347 * 21 13 41.8579953000 +45 36 41.264109504 6.6 7.41 7.50     B1V 70 0
40 HD 203374 Be* 21 19 07.3685524992 +61 51 30.436799148 6.23 6.908 6.674     B0IVpe 130 0
41 HD 206267 SB* 21 38 57.6195772032 +57 29 20.554016280 5.09 5.83 5.62   5.56 O6.0V((f))+O9:V 499 0
42 HD 208947 EB* 21 57 11.1009923376 +66 09 22.155335100 5.65 6.337 6.394     B2V 95 0
43 HD 209339 ** 22 00 39.2649125112 +62 29 16.063886004 5.9 8.73 8.51 7.61   O9.7IV 184 0
44 HD 218915 s*b 23 11 06.9483955128 +53 03 29.652921252 6.32 7.22 7.20     O9.2Iab 197 1
45 V* V373 Cas SB* 23 55 33.8386958472 +57 24 43.807358448 5.49 6.21 6.00     B0.5II-III 151 0
46 NAME Local Arm reg ~ ~           ~ 537 0
47 NAME Gould Belt PoG ~ ~           ~ 874 1

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