2017A&A...608A..98S

Query : 2017A&A...608A..98S

2017A&A...608A..98S - Astronomy and Astrophysics, volume 608A, 98-98 (2017/12-1)

Inefficient jet-induced star formation in Centaurus A. High resolution ALMA observations of the northern filaments.

SALOME Q., SALOME P., MIVILLE-DESCHENES M.-A., COMBES F. and HAMER S.

Abstract (from CDS):

NGC 5128 (Centaurus A) is one of the best targets to study AGN feedback in the local Universe. At 13.5kpc from the galaxy, optical filaments with recent star formation lie along the radio jet direction. This region is a testbed for positive feedback, here through jet-induced star formation. Atacama Pathfinder EXperiment (APEX) observations have revealed strong CO emission in star-forming regions and in regions with no detected tracers of star formation activity. In cases where star formation is observed, this activity appears to be inefficient compared to the Kennicutt-Schmidt relation. We used the Atacama Large Millimeter/submillimeter Array (ALMA) to map the 12CO(1-0) emission all along the filaments of NGC 5128 at a resolution of 1.3'' ∼23.8pc. We find that the CO emission is clumpy and is distributed in two main structures: (i) the Horseshoe complex, located outside the HI cloud, where gas is mostly excited by shocks and where no star formation is observed, and (ii) the Vertical filament, located at the edge of the HI shell, which is a region of moderate star formation. We identified 140 molecular clouds using a clustering method applied to the CO data cube. A statistical study reveals that these clouds have very similar physical properties, such as size, velocity dispersion, and mass, as in the inner Milky Way. However, the range of radius available with the present ALMA observations does not enable us to investigate whether or not the clouds follow the Larson relation. The large virial parameter αvir of the clouds suggests that gravity is not dominant and clouds are not gravitationally unstable. Finally, the total energy injection in the northern filaments of Centaurus A is of the same order as in the inner part of the Milky Way. The strong CO emission detected in the northern filaments is an indication that the energy injected by the jet acts positively in the formation of dense molecular gas. The relatively high virial parameter of the molecular clouds suggests that the injected kinetic energy is too strong for star formation to be efficient. This is particularly the case in the horseshoe complex, where the virial parameter is the largest and where strong CO is detected with no associated star formation. This is the first evidence of AGN positive feedback in the sense of forming molecular gas through shocks, associated with low star formation efficiency due to turbulence injection by the interaction with the radio jet.

Abstract Copyright: © ESO, 2017

Journal keyword(s): methods: data analysis - galaxies: individual: Centaurus A - galaxies: evolution - galaxies: interactions - galaxies: star formation - radio lines: galaxies - radio lines: galaxies

VizieR on-line data: <Available at CDS (J/A+A/608/A98): catalog.dat catalog.fits>

Nomenclature: catalog.dat: [SSM2017] NNN (Nos 1-144).

Errata: erratum vol. 617, art. C3 (2018)

Simbad objects: 144

goto Full paper

goto View the references in ADS

Number of rows : 144
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 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 5838 1
2 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17432 0
3 NAME Centaurus A Sy2 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4484 3
4 [SSM2017] 48 MoC 13 26 15.49 -42 47 43.3           ~ 1 0
5 [SSM2017] 73 MoC 13 26 15.67 -42 47 45.2           ~ 1 0
6 [SSM2017] 8 MoC 13 26 16.48 -42 48 01.2           ~ 1 0
7 [SSM2017] 54 MoC 13 26 19.32 -42 48 45.6           ~ 1 0
8 [SSM2017] 95 MoC 13 26 20.38 -42 51 43.0           ~ 1 0
9 [SSM2017] 85 MoC 13 26 20.53 -42 51 42.1           ~ 1 0
10 [SSM2017] 46 MoC 13 26 20.58 -42 51 42.7           ~ 1 0
11 [SSM2017] 52 MoC 13 26 20.61 -42 50 26.4           ~ 1 0
12 [SSM2017] 143 MoC 13 26 20.62 -42 50 26.2           ~ 1 0
13 [SSM2017] 44 MoC 13 26 20.81 -42 50 22.2           ~ 1 0
14 [SSM2017] 32 MoC 13 26 20.86 -42 51 43.3           ~ 1 0
15 [SSM2017] 60 MoC 13 26 21.27 -42 49 32.2           ~ 1 0
16 [SSM2017] 121 MoC 13 26 21.58 -42 49 19.8           ~ 1 0
17 [SSM2017] 84 MoC 13 26 21.60 -42 49 21.1           ~ 1 0
18 [SSM2017] 7 MoC 13 26 21.72 -42 49 36.4           ~ 1 0
19 [SSM2017] 1 MoC 13 26 21.75 -42 49 20.9           ~ 1 0
20 [SSM2017] 97 MoC 13 26 21.80 -42 49 18.0           ~ 1 0
21 [SSM2017] 9 MoC 13 26 21.84 -42 49 15.4           ~ 1 0
22 [SSM2017] 65 MoC 13 26 21.84 -42 49 05.4           ~ 1 0
23 [SSM2017] 38 MoC 13 26 21.85 -42 49 07.2           ~ 1 0
24 [SSM2017] 122 MoC 13 26 21.87 -42 49 12.1           ~ 1 0
25 [SSM2017] 57 MoC 13 26 21.87 -42 49 38.3           ~ 1 0
26 [SSM2017] 5 MoC 13 26 21.89 -42 49 13.0           ~ 1 0
27 [SSM2017] 61 MoC 13 26 21.90 -42 49 06.5           ~ 1 0
28 [SSM2017] 21 MoC 13 26 21.90 -42 49 08.0           ~ 1 0
29 [SSM2017] 40 MoC 13 26 22.00 -42 49 09.0           ~ 1 0
30 [SSM2017] 10 MoC 13 26 22.08 -42 48 56.9           ~ 1 0
31 [SSM2017] 20 MoC 13 26 25.32 -42 50 28.4           ~ 1 0
32 [SSM2017] 74 MoC 13 26 25.40 -42 50 28.3           ~ 1 0
33 [SSM2017] 6 MoC 13 26 25.46 -42 50 29.3           ~ 1 0
34 [SSM2017] 47 MoC 13 26 25.52 -42 49 54.2           ~ 1 0
35 [SSM2017] 129 MoC 13 26 25.53 -42 50 00.4           ~ 1 0
36 [SSM2017] 14 MoC 13 26 25.54 -42 49 54.8           ~ 1 0
37 [SSM2017] 125 MoC 13 26 25.55 -42 49 54.8           ~ 1 0
38 [SSM2017] 89 MoC 13 26 25.59 -42 49 59.1           ~ 1 0
39 [SSM2017] 81 MoC 13 26 25.60 -42 49 57.6           ~ 1 0
40 [SSM2017] 68 MoC 13 26 25.68 -42 49 55.0           ~ 1 0
41 [SSM2017] 3 MoC 13 26 25.70 -42 50 29.9           ~ 1 0
42 [SSM2017] 69 MoC 13 26 25.82 -42 49 53.5           ~ 1 0
43 [SSM2017] 138 MoC 13 26 25.96 -42 49 52.1           ~ 1 0
44 [SSM2017] 82 MoC 13 26 26.32 -42 49 57.9           ~ 1 0
45 [SSM2017] 11 MoC 13 26 26.32 -42 49 17.4           ~ 1 0
46 [SSM2017] 90 MoC 13 26 26.32 -42 49 42.0           ~ 1 0
47 [SSM2017] 131 MoC 13 26 26.42 -42 49 15.0           ~ 1 0
48 [SSM2017] 78 MoC 13 26 26.43 -42 49 25.5           ~ 1 0
49 [SSM2017] 70 MoC 13 26 26.44 -42 49 41.9           ~ 1 0
50 [SSM2017] 111 MoC 13 26 26.49 -42 49 54.8           ~ 1 0
51 [SSM2017] 77 MoC 13 26 26.49 -42 49 43.3           ~ 1 0
52 [SSM2017] 108 MoC 13 26 26.51 -42 49 08.3           ~ 1 0
53 [SSM2017] 80 MoC 13 26 26.61 -42 49 55.5           ~ 1 0
54 [SSM2017] 133 MoC 13 26 26.64 -42 49 07.4           ~ 1 0
55 [SSM2017] 26 MoC 13 26 26.72 -42 49 34.6           ~ 1 0
56 [SSM2017] 83 MoC 13 26 26.72 -42 49 11.4           ~ 1 0
57 [SSM2017] 118 MoC 13 26 26.79 -42 49 32.5           ~ 1 0
58 [SSM2017] 25 MoC 13 26 26.81 -42 49 12.4           ~ 1 0
59 [SSM2017] 127 MoC 13 26 26.91 -42 49 14.1           ~ 1 0
60 [SSM2017] 22 MoC 13 26 26.92 -42 49 33.4           ~ 1 0
61 [SSM2017] 103 MoC 13 26 26.97 -42 48 51.7           ~ 1 0
62 [SSM2017] 63 MoC 13 26 26.99 -42 48 51.4           ~ 1 0
63 [SSM2017] 141 MoC 13 26 27.01 -42 48 51.9           ~ 1 0
64 [SSM2017] 12 MoC 13 26 27.04 -42 49 11.8           ~ 1 0
65 [SSM2017] 49 MoC 13 26 27.06 -42 49 15.4           ~ 1 0
66 [SSM2017] 93 MoC 13 26 27.17 -42 48 49.9           ~ 1 0
67 [SSM2017] 59 MoC 13 26 27.34 -42 48 48.8           ~ 1 0
68 [SSM2017] 92 MoC 13 26 27.35 -42 48 58.8           ~ 1 0
69 [SSM2017] 19 MoC 13 26 27.36 -42 49 09.0           ~ 1 0
70 [SSM2017] 104 MoC 13 26 27.38 -42 49 35.2           ~ 1 0
71 [SSM2017] 88 MoC 13 26 27.46 -42 49 43.7           ~ 1 0
72 [SSM2017] 91 MoC 13 26 27.54 -42 48 56.6           ~ 1 0
73 [SSM2017] 71 MoC 13 26 27.58 -42 49 08.7           ~ 1 0
74 [SSM2017] 115 MoC 13 26 27.63 -42 49 46.5           ~ 1 0
75 [SSM2017] 123 MoC 13 26 27.63 -42 48 47.2           ~ 1 0
76 [SSM2017] 72 MoC 13 26 27.67 -42 48 56.6           ~ 1 0
77 [SSM2017] 130 MoC 13 26 27.71 -42 48 54.9           ~ 1 0
78 [SSM2017] 100 MoC 13 26 27.72 -42 48 47.3           ~ 1 0
79 [SSM2017] 56 MoC 13 26 27.74 -42 48 41.1           ~ 1 0
80 [SSM2017] 109 MoC 13 26 27.77 -42 48 57.5           ~ 1 0
81 [SSM2017] 18 MoC 13 26 28.00 -42 48 58.0           ~ 1 0
82 [SSM2017] 120 MoC 13 26 28.11 -42 48 55.4           ~ 1 0
83 [SSM2017] 101 MoC 13 26 28.15 -42 48 55.9           ~ 1 0
84 [SSM2017] 107 MoC 13 26 28.29 -42 48 58.8           ~ 1 0
85 [SSM2017] 136 MoC 13 26 28.41 -42 48 58.0           ~ 1 0
86 [SSM2017] 16 MoC 13 26 28.50 -42 48 55.9           ~ 1 0
87 [SSM2017] 137 MoC 13 26 28.52 -42 48 49.4           ~ 1 0
88 [SSM2017] 4 MoC 13 26 28.70 -42 49 55.1           ~ 1 0
89 [SSM2017] 119 MoC 13 26 28.98 -42 49 02.8           ~ 1 0
90 [SSM2017] 79 MoC 13 26 29.07 -42 49 04.5           ~ 1 0
91 [SSM2017] 33 MoC 13 26 29.08 -42 49 51.3           ~ 1 0
92 [SSM2017] 116 MoC 13 26 29.08 -42 49 02.9           ~ 1 0
93 [SSM2017] 96 MoC 13 26 29.20 -42 49 48.5           ~ 1 0
94 [SSM2017] 132 MoC 13 26 29.22 -42 48 50.2           ~ 1 0
95 [SSM2017] 126 MoC 13 26 29.25 -42 49 48.8           ~ 1 0
96 [SSM2017] 139 MoC 13 26 29.29 -42 48 59.8           ~ 1 0
97 [SSM2017] 140 MoC 13 26 29.29 -42 48 47.2           ~ 1 0
98 [SSM2017] 41 MoC 13 26 29.32 -42 48 46.4           ~ 1 0
99 [SSM2017] 67 MoC 13 26 29.32 -42 49 00.2           ~ 1 0
100 [SSM2017] 124 MoC 13 26 29.33 -42 48 48.6           ~ 1 0
101 [SSM2017] 112 MoC 13 26 29.36 -42 48 59.6           ~ 1 0
102 [SSM2017] 86 MoC 13 26 29.37 -42 49 48.4           ~ 1 0
103 [SSM2017] 66 MoC 13 26 29.44 -42 49 10.8           ~ 1 0
104 [SSM2017] 105 MoC 13 26 29.96 -42 49 15.6           ~ 1 0
105 [SSM2017] 39 MoC 13 26 29.97 -42 49 15.2           ~ 1 0
106 [SSM2017] 27 MoC 13 26 30.00 -42 49 25.7           ~ 1 0
107 [SSM2017] 113 MoC 13 26 30.04 -42 49 17.1           ~ 1 0
108 [SSM2017] 142 MoC 13 26 30.04 -42 49 04.3           ~ 1 0
109 [SSM2017] 75 MoC 13 26 30.08 -42 49 16.0           ~ 1 0
110 [SSM2017] 45 MoC 13 26 30.08 -42 49 26.0           ~ 1 0
111 [SSM2017] 53 MoC 13 26 30.09 -42 49 18.6           ~ 1 0
112 [SSM2017] 13 MoC 13 26 30.11 -42 49 20.7           ~ 1 0
113 [SSM2017] 99 MoC 13 26 30.11 -42 49 15.5           ~ 1 0
114 [SSM2017] 31 MoC 13 26 30.15 -42 49 03.3           ~ 1 0
115 [SSM2017] 134 MoC 13 26 30.16 -42 49 24.2           ~ 1 0
116 [SSM2017] 62 MoC 13 26 30.16 -42 49 16.5           ~ 1 0
117 [SSM2017] 128 MoC 13 26 30.18 -42 49 17.6           ~ 1 0
118 [SSM2017] 24 MoC 13 26 30.21 -42 49 04.1           ~ 1 0
119 [SSM2017] 37 MoC 13 26 30.22 -42 49 21.3           ~ 1 0
120 [SSM2017] 55 MoC 13 26 30.22 -42 49 11.7           ~ 1 0
121 [SSM2017] 87 MoC 13 26 30.2360052696 -42 49 14.965857552           ~ 1 0
122 [SSM2017] 42 MoC 13 26 30.35 -42 49 08.1           ~ 1 0
123 [SSM2017] 35 MoC 13 26 30.38 -42 49 06.9           ~ 1 0
124 [SSM2017] 34 MoC 13 26 30.48 -42 48 54.6           ~ 1 0
125 [SSM2017] 50 MoC 13 26 31.20 -42 48 48.2           ~ 1 0
126 [SSM2017] 51 MoC 13 26 31.25 -42 48 49.4           ~ 1 0
127 [SSM2017] 144 MoC 13 26 31.26 -42 48 46.7           ~ 1 0
128 [SSM2017] 23 MoC 13 26 31.38 -42 48 47.8           ~ 1 0
129 [SSM2017] 28 MoC 13 26 31.40 -42 48 46.0           ~ 1 0
130 [SSM2017] 36 MoC 13 26 31.50 -42 48 45.4           ~ 1 0
131 [SSM2017] 117 MoC 13 26 31.55 -42 48 46.2           ~ 1 0
132 [SSM2017] 30 MoC 13 26 31.70 -42 48 37.2           ~ 1 0
133 [SSM2017] 2 MoC 13 26 32.09 -42 48 45.7           ~ 1 0
134 [SSM2017] 58 MoC 13 26 32.10 -42 48 44.5           ~ 1 0
135 [SSM2017] 102 MoC 13 26 32.11 -42 48 43.6           ~ 1 0
136 [SSM2017] 114 MoC 13 26 32.50 -42 48 39.7           ~ 1 0
137 [SSM2017] 17 MoC 13 26 32.51 -42 48 40.0           ~ 1 0
138 [SSM2017] 15 MoC 13 26 32.54 -42 48 40.4           ~ 1 0
139 [SSM2017] 43 MoC 13 26 32.54 -42 48 40.3           ~ 1 0
140 [SSM2017] 29 MoC 13 26 32.61 -42 48 40.4           ~ 1 0
141 [SSM2017] 64 MoC 13 26 32.66 -42 48 39.0           ~ 1 0
142 [SSM2017] 94 MoC 13 26 32.81 -42 48 40.4           ~ 1 0
143 [SSM2017] 98 MoC 13 26 32.84 -42 48 39.3           ~ 1 0
144 M 51 Sy2 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4329 4

To bookmark this query, right click on this link: simbad:objects in 2017A&A...608A..98S and select 'bookmark this link' or equivalent in the popup menu