2007A&A...476..255A

Query : 2007A&A...476..255A

2007A&A...476..255A - Astronomy and Astrophysics, volume 476255-261 (2007/12-2)

GS 263-02+45: a new HI supershell with evidence of having triggered star formation?

ARNAL E.M. and CORTI M.

Abstract (from CDS):

We look for galactic neutral hydrogen (HI) supershells likely to be associated with massive star groupings. A neutral hydrogen (HI) line survey carried out at the Instituto Argentino de Radioastronomia (IAR) and the Southern Galactic Plane Survey (SGPS) were the main databases used in this investigation. A new HI supershell (GS263-02+45) was found in the outer part of the Galaxy. This structure is located at a distance of 5.3±1kpc from the Sun and has a linear diameter of about 665±40pc. The expansion velocity of the supershell is ∼14km/s. The total amount of atomic gas related to GS263-02+45 is ∼2x106M☉. Based on the analysis of the SGPS HI data it is concluded that the OB-association Bochum 7 is likely to be interacting with GS263-02+45. This fact together with distance and age arguments may indicate that Bochum 7 was born as a consequence of the evolution of GS263-02+45.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: kinematics and dynamics - Galaxy: structure - ISM: bubbles - ISM: structure - radio lines: ISM

CDS comments: CBN843648.6-460736 is a misprint for CBN84348.6-460736, CBN84505.0-455648 is a probable misprint for CBN844450.1-455648.

Simbad objects: 16

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Number of rows : 16
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 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
2 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
3 GSH 263-02+45 sh 08 37 -44.           ~ 8 0
4 CD-45 4447 * 08 43 24.1537949616 -46 08 28.658569200 10.76 11.26 10.77 11.02   O7.5V 20 0
5 TYC 8151-1072-1 * 08 43 48.7934027616 -46 07 33.713704812   12.64 12.66     ~ 7 0
6 CPD-45 2920 EB* 08 43 49.8047993256 -46 07 08.757379416 10.6 11.36 10.99 10.91   O6.5V(n)((f)) 39 1
7 TOI-2905 ** 08 43 50.84616 -45 58 19.4628   13.471 12.881 12.715   B1.5V 3 0
8 CD-45 4462 ** 08 43 51.0870877776 -46 03 46.278754344 11.31 11.87 11.36 11.30   OB- 15 0
9 LS 1140 * 08 44 04.5156801816 -45 53 15.934366680 12.06 12.38 11.65 11.45   OB+ 12 0
10 CD-45 4472 * 08 44 25.0614061680 -45 53 34.556812908 11.45 11.90 11.29 11.21   OB 15 0
11 Cl Bochum 7 OpC 08 44 28.2 -45 55 19   6.94 6.8     ~ 52 0
12 CD-45 4484 Pu* 08 44 50.1574521936 -45 56 48.384615732 11.05 11.56 11.39     B2V 9 0
13 CPD-45 2961 * 08 44 51.0383617176 -46 10 10.760075112 11.55 12.07 11.53 11.45   OB 13 0
14 GSC 08151-01942 * 08 45 05.1204850176 -46 02 59.811604008     12.6     B2.5-3V 6 0
15 UCAC2 12177291 * 08 45 18.8876864160 -45 41 49.433184240     14.8     B5V 3 0
16 GSH 263+00+47 sh 08 46 -43.           ~ 4 0

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