2001MNRAS.325.1213W

Query : 2001MNRAS.325.1213W

2001MNRAS.325.1213W - Mon. Not. R. Astron. Soc., 325, 1213-1227 (2001/August-2)

Kinematics of the Gum nebula region.

WOERMANN B., GAYLARD M.J. and OTRUPCEK R.

Abstract (from CDS):

To investigate the kinematics of the neutral material around the Gum nebula, emission from hydroxyl at 1667 MHz was observed at many positions over the region. Fitting models of expanding shells to these data together with previously published molecular line data shows that the diffuse molecular clouds and cometary globules form a single expanding shell centred on G261-2.5. The mean angular radius is 10.5° and its maximum radius is 14°. The models show that the distance range to the expansion centre is from 200pc to 500pc.

The path of the runaway O-star ζ Puppis passed within <0.5° of the expansion centre of the neutral shell ∼1.5Myr ago. The supernova of the erstwhile binary companion of ζ Puppis is the probable origin of the Gum nebula and the swept up expanding neutral shell. The 500-pc distance to the supernova is adopted as the distance to the expansion centre of the neutral shell. At this distance the energy required to produce the observed expansion could have been met with a single supernova. The radii of the front and back faces of the shell are 130 and 70pc respectively. The front face is expanding faster than the back face, at 14 and 8.5km.s–1 respectively.

The extent of the neutral shell matches the radio continuum and Hα emission of the Gum nebula well. The photoionized gas in the nebula is probably primarily ionized by ζ Puppis, which is still within the neutral shell. No evidence was found for the IRAS-Vela shell as a separate expanding shell.


Abstract Copyright: The Royal Astronomical Society

Journal keyword(s): stars: individual: ζ Pup - Hii regions - ISM: individual: Gum nebula - ISM: individual: IRAS-Vela shell - ISM: kinematics and dynamics - ISM: supernova remnants

Nomenclature: Table 3: DMC GLLL.ll+BB.bb N=100.

Simbad objects: 48

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Number of rows : 48
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 CG 13 CGb 07 14 11.3 -48 28 32           ~ 19 0
2 [DB2002b] G255.30-14.35 DNe 07 16 01 -43 57.7           ~ 18 1
3 CG 1 CGb 07 19 21.5 -44 35 03           ~ 40 1
4 CG 16 CGb 07 27 36.4 -51 04 44           ~ 16 0
5 [DB2002b] G253.81-10.91 DNe 07 29 33 -41 10.5           ~ 13 0
6 CG 6 CGb 07 30 33 -46 43.7           ~ 20 1
7 [DB2002b] G262.91-14.66 DNe 07 32 22 -50 45.6           ~ 20 0
8 [DB2002b] G259.43-12.72 DNe 07 34 09 -46 54.3           ~ 31 1
9 CG 25 CGb 07 37 22.3 -47 57 05           ~ 6 0
10 CG 14 CGb 07 38 38.0 -49 51 24           ~ 15 0
11 CG 3 CGb 07 39 12.6 -47 52 33           ~ 12 1
12 CG 9 CGb 07 40 47.8 -41 27 07           ~ 12 0
13 [DB2002b] G257.18-10.27 DNe 07 40 51.5 -43 49 12           ~ 15 1
14 CG 10 CGb 07 42 34.5 -42 05 23           ~ 13 0
15 CG 8 CGb 07 42 42.2 -41 15 44           ~ 13 1
16 NAME GUM Nebula ISM 07 43 -42.1           ~ 454 1
17 NAME IRAS Vela Shell IR 07 44 -42.4           ~ 42 0
18 * zet Pup BY* 08 03 35.04754 -40 00 11.3321 0.89 1.98 2.25 2.36 2.58 O4I(n)fp 1190 1
19 CG 31D CGb 08 08 17 -36 01.8           ~ 10 0
20 CG 31C CGb 08 08 33 -35 59.5           ~ 13 0
21 CG 31B CGb 08 08 48 -36 03.0           ~ 14 0
22 CG 31A CGb 08 09 03 -36 01.3           ~ 15 0
23 Ass Vel OB 2 As* 08 09 22.478 -47 21 03.46           ~ 307 0
24 * gam02 Vel WR* 08 09 31.95013 -47 20 11.7108 0.64 1.58 1.83 1.85 2.00 WC8+O7.5III-V 951 0
25 CG 30 CGb 08 09 32.8 -36 05 00           ~ 136 0
26 [DB2002b] G253.38-1.65 DNe 08 09 39 -36 10.6           ~ 18 0
27 CG 28 CGb 08 12 22.3 -33 55 36           ~ 11 0
28 CG 29 CGb 08 12 23.9 -34 00 58           ~ 8 0
29 [DB2002b] G251.67+0.15 DNe 08 12 24.7 -33 45 16           ~ 11 0
30 [DB2002b] G251.12+0.53 DNe 08 12 28 -33 05.6           ~ 5 0
31 CG 32B CGb 08 14 17.9 -34 28 10           ~ 2 0
32 BHR 7 DNe 08 14 23.33 -34 31 03.7           ~ 17 0
33 CG 32A CGb 08 14 24.1 -34 30 19           ~ 2 0
34 CG 33 CGb 08 15 29.9 -34 04 34           ~ 10 0
35 CG 26 CGb 08 15 59.9 -33 50 10           ~ 11 0
36 CG 24 CGb 08 19 15.8 -42 54 27           ~ 10 0
37 NAME ESO 210- 6A MoC 08 25 44 -51 02.1           ~ 40 1
38 [DB2002b] G267.29-7.32 DNe 08 26 24 -50 51.1           ~ 7 0
39 BHR 34 MoC 08 26 34 -50 39.9           ~ 19 0
40 BHR 37 MoC 08 26 40 -51 01.6           ~ 19 0
41 CG 22B1 CGb 08 28 46.2 -33 44 14           ~ 2 0
42 CG 22B2 CGb 08 29 15.4 -33 24 16           ~ 2 0
43 [DB2002b] G256.94+2.64 DNe 08 37 18.0 -36 37 56           ~ 11 0
44 Cl Trumpler 10 OpC 08 47 46.4 -42 31 52           ~ 203 0
45 [DB2002b] G270.58-4.67 DNe 08 52 36 -51 51.9           ~ 11 0
46 [DB2002b] G269.66-3.90 DNe 08 52 38 -50 40.1           ~ 11 0
47 CG 7 CGb 09 14 19.3 -42 29 23           ~ 10 1
48 CG 32B1 CGb ~ ~           ~ 1 0

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