2012A&A...546A..62C

Query : 2012A&A...546A..62C

2012A&A...546A..62C - Astronomy and Astrophysics, volume 546A62-62 (2012/10-1)

GS 305+04-26: revisiting the interstellar medium around the Centaurus OB1 stellar association.

CORTI M.A., ARNAL E.M. and ORELLANA R.B.

Abstract (from CDS):

Massive stars deeply modify their surrounding interstellar medium (ISM) via their high throughput of ionizing photons and their strong stellar winds. In this way, they may create large expanding structures of neutral gas. We study a new large neutral hydrogen (HI) shell, labelled GS305+04-26, and its relationship with the OB association Cen OB1. To carry out this study, we have used a multi-wavelength approach. We analyse both HI line data retrieved from the Leiden-Argentina-Bonn (LAB) survey and new spectroscopic optical observations obtained at CASLEO, as well as make use of proper motion databases available from CDS. The analysis of the HI data reveals a large expanding structure GS305+04-26 centred at (l, b)=(305°, +4°) in the velocity range from -33 to -17km/s. Based on its central velocity of -26km/s and using standard galactic rotation models, a distance of 2.5±0.9kpc is inferred. This structure, elliptical in shape, has a major and minor axis of 440 and 270pc, respectively. Its expansion velocity, total gaseous mass, and kinetic energy are ∼8km/s, (2.4±0.5)x105M☉, and (1.6±0.4)x1050erg, respectively. Several stars of the OB-association Cen OB1 are seen projected onto, and within, the boundaries of GS305+04-26. Based on an analysis of proper motions, new members of Cen OB1 are identified. The mechanical energy injected by these stars could have been the origin of this HI structure.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: kinematics and dynamics - Galaxy: structure - open clusters and associations: individual: Cen OB1 - ISM: bubbles - ISM: structure - radio lines: ISM

Simbad objects: 73

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Number of rows : 73
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 Ass Per OB 2 As* 03 42.2 +33 26           ~ 350 0
2 HD 57682 * 07 22 02.0546074728 -08 58 45.766323408 5.20 6.24 6.43     O9.2IV 275 0
3 HD 108516 * 12 28 20.2007656248 -62 57 27.294855624   9.60 9.48     B1/3(III) 21 0
4 HD 109150 * 12 32 57.4240234032 -59 26 37.952429712   8.65 8.57 9.38   B2II/III 23 0
5 HD 109253 * 12 33 58.7622131808 -64 22 36.950349108   9.76 9.59     B8II/III 8 0
6 HD 109505 * 12 35 46.3972680504 -61 34 22.885446108 7.58 8.95 8.68 9.04   B2II 31 0
7 HD 109937 * 12 39 19.4551388592 -63 21 41.215665060   9.78 9.40 9.77   B2/3III 24 0
8 HD 109978 * 12 39 37.6536035712 -62 26 01.069706472 8.61 9.59 9.27 9.44   O9III 56 0
9 HD 110449 Pu* 12 42 52.9639808712 -60 58 32.760436656   9.45 9.32     B2III 24 0
10 HD 110597 * 12 43 53.0476782768 -59 20 09.768252732   9.64 9.50     B8II 16 0
11 HD 110639 * 12 44 17.0839955616 -61 23 40.699619844 8.90 9.15 8.46 9.01   B1II-III 50 0
12 CD-64 654 * 12 45 44.1272011704 -65 37 23.592046476 9.30 9.86 9.72     B1V 18 0
13 HD 110912 * 12 46 18.5914549656 -62 18 02.398618152 9.88 9.99 9.76     B8II/III 18 0
14 HD 110984 * 12 46 44.8303084512 -61 11 11.518388556 8.93 9.50 9.03 9.52   B1II/III 51 0
15 HD 111121 * 12 47 47.1806385936 -59 05 04.360230960   9.72 9.63     B8/9II/III 14 0
16 HD 111579 * 12 51 03.5545152432 -61 14 37.748527476 9.45 9.68 9.12 9.53   B2Ib/II 42 0
17 HD 111613 sg* 12 51 17.9760267672 -60 19 47.240368104 6.00 6.10 5.72 5.32 5.03 B9.5Iab 123 0
18 HD 111904 V* 12 53 21.8944330272 -60 19 42.561114312 5.75 6.05 5.77 7.09   B9Iab 112 0
19 PSR J1253-5819 Psr 12 53 28.41800 -58 20 40.4700           ~ 42 0
20 V* BU Cru EB* 12 53 37.6193092848 -60 21 25.425832356 6.49 7.04 6.84 7.55   B2Ib 115 0
21 NGC 4755 OpC 12 53 39.2 -60 22 07           ~ 300 0
22 CPD-59 4552 * 12 53 46.4935086912 -60 24 12.419407044 7.79 8.337 8.24 9.13   B1III 53 0
23 * kap Cru SB* 12 53 48.9198156672 -60 22 34.469837436 5.62 6.12 5.94 7.12   B5I 133 0
24 HD 111990 s*b 12 53 59.7993033672 -60 20 07.510329996 6.46 6.95 6.78 7.68   B1.5I+ 88 0
25 HD 112026 * 12 54 18.4293545928 -60 53 38.933092284 7.89 8.69 8.66     B0/1IV 33 0
26 PSR J1254-6150 Psr 12 54 32.48 -61 50 50.8           ~ 5 0
27 HD 112147 Be* 12 55 08.4592556760 -59 01 07.420634076 8.54 9.316 9.13 9.58   Be 56 0
28 HD 112181 * 12 55 31.8133027944 -60 39 00.539510220 8.19 9.30 9.19 9.49   B2/3II/III 30 0
29 HD 112364 * 12 56 59.6537560344 -59 44 33.019441692 6.9 7.532 7.387     B1III 46 0
30 HD 112382 Em* 12 56 59.9134925328 -59 02 00.705360696   9.22 9.01     B4II 20 0
31 HD 112366 * 12 57 11.1041849016 -63 27 52.150951764 8.21 8.36 7.63 8.41   B6Iab/b 34 0
32 HD 112471 ** 12 57 44.9287468944 -60 53 15.589909572 8.36 9.37 9.13 9.46   B1II/III 32 0
33 HD 112485 * 12 57 51.5045245080 -60 48 56.079032004 8.84 9.57 9.53     B1/3(III) 32 0
34 HD 112497 * 12 58 00.9742928208 -61 03 19.156889484 8.38 9.27 8.97 9.15   B1/2II/III 35 0
35 HD 112637 * 12 59 15.6249408432 -63 18 16.131531168   9.90 9.55     B2III 19 0
36 HD 112661 ** 12 59 21.2389897944 -62 17 20.583200508 9.6 9.96 9.51 9.65   B0/1III/IV 24 0
37 HD 112784 * 13 00 05.6358335496 -60 35 37.219832124 7.50 8.31 8.26 9.11   O9.5III 85 0
38 HD 112842 * 13 00 31.5270309480 -60 22 31.322664660 6.83 7.234 7.072     B4II 54 0
39 HD 112852 * 13 00 34.2947415312 -59 34 51.698547084   10.14 9.91     B8/9II 20 0
40 HD 113012 * 13 01 41.5340241456 -60 04 35.168733264 7.46 8.23 8.13 8.98   B0III 73 0
41 Ass Cen OB 1 As* 13 02 -61.4           ~ 107 0
42 HD 113421 * 13 04 31.6343926368 -59 49 28.123433652 8.86 9.54 9.33 9.76   B0Vn 37 0
43 HD 113422 * 13 04 36.8521601136 -61 42 37.014895224 8.87 9.07 8.24 9.04   B1/2Ia/ab 71 0
44 HD 113432 Em* 13 04 49.3221518976 -63 29 29.249057472 9.4 9.70 9.19 9.40   B1Ib 47 0
45 HD 113606 * 13 06 03.1668206448 -64 14 35.581288272 8.54 9.76 9.10 9.38   O9.5III 30 0
46 HD 113708 * 13 06 48.3355631328 -65 12 43.719050160 7.22 8.03 8.17 9.03   B1/2III(n) 43 0
47 CD-61 3664 * 13 06 48.9662816112 -61 47 00.066692472 9.76 10.21 9.62 9.58   O9.5V 27 0
48 HD 113742 V* 13 06 53.7480444089 -61 56 38.007569335   9.53 9.20 9.62   B1/2(III) 22 0
49 HD 113754 * 13 07 04.3903295376 -62 59 30.454795860 9.7 10.12 9.63 9.78   O6/7 37 0
50 GSH 305+04-26 sh 13 07 -59.           ~ 4 0
51 * tet Mus WR* 13 08 07.1531705448 -65 18 21.679426548 4.71 5.50 5.53 5.44 5.40 WC5+B0III 336 0
52 HD 114011 * 13 08 43.0570687992 -61 11 10.964598612 9.8 10.08 9.36 9.59   B3/5Ib/II 53 0
53 GSH 305+01-24 sh 13 10 -62.0           ~ 9 0
54 HD 114213 * 13 10 21.3701195472 -61 28 20.891598132 9.86 9.88 8.96 9.40   B1Ib 87 0
55 HD 114394 * 13 11 20.5926237456 -59 34 36.926101452 7.74 8.44 8.22 9.03   B1III 30 0
56 HD 114478 * 13 11 57.4969101840 -62 48 54.873922428 8.63 9.59 9.56 9.40   B1Ib/II 36 0
57 HD 114669 * 13 13 10.7559248112 -62 31 38.199072000   9.22 9.07     B5II 19 0
58 CD-60 4554 * 13 13 11.7410033880 -61 05 21.250960908 8.33 9.01 8.78 9.44   B1III 33 0
59 HD 114737 ** 13 13 45.5333080580 -63 35 11.718886112 7.43 8.19 8.00 8.92   O8.5III 67 0
60 HD 114886 ** 13 14 44.38260 -63 34 51.8077 6.15 6.98 6.89 7.76   O9-B0V 114 0
61 CD-60 4575 Be* 13 15 10.0023337536 -60 58 00.731270820 9.98 10.37 9.81 9.94   B1IIIne 40 0
62 HD 115223 * 13 16 52.4646744360 -60 27 22.541966136 9.55 9.38 8.98 9.25   A0Ib/II 23 0
63 HD 115363 s*b 13 18 06.8646697584 -63 41 13.636931100 7.95 8.46 7.87 8.72   B1Ia+ 85 0
64 HD 115455 SB* 13 18 35.3592390638 -62 29 28.407889555 7.40 8.17 7.97 8.81   O8III((f)) 109 1
65 CD-61 3731 * 13 18 39.2838141912 -62 31 48.227992464 9.1 9.68 9.53     B0.5V 24 0
66 HD 115497 * 13 18 40.7949658656 -59 00 39.541161564   9.81 9.71     B8/9II 17 0
67 HD 115666 * 13 19 54.4541488800 -60 52 20.150098968   9.49 9.40     B7II 16 0
68 HD 116119 sg* 13 22 55.6323732336 -62 00 44.007428844 8.53 8.58 7.87 8.64   A0Ia 61 0
69 HD 116121 * 13 23 03.7967895840 -63 03 42.386305644   9.26 9.27     O9/B0(V) 27 0
70 HD 116403 * 13 24 51.6972278400 -61 01 44.920586280 8.63 9.00 9.00     B5II/III 18 0
71 HD 116864 Pu* 13 28 00.2196904968 -63 13 29.255582604   9.13 9.12     B9II/III 10 0
72 PSR J1334-5839 Psr 13 34 30.1091 -58 39 16.545           ~ 10 0
73 * nu. Cap * 20 20 39.8157949497 -12 45 32.690284207 4.61 4.72 4.76 4.75 4.81 B9IV 279 0

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