2015MNRAS.450.3935L


Query : 2015MNRAS.450.3935L

2015MNRAS.450.3935L - Mon. Not. R. Astron. Soc., 450, 3935-3951 (2015/July-2)

HI observations of the nearest starburst galaxy NGC 253 with the SKA precursor KAT-7.

LUCERO D.M., CARIGNAN C., ELSON E.C., RANDRIAMAMPANDRY T.H., JARRETT T.H., OOSTERLOO T.A. and HEALD G.H.

Abstract (from CDS):

We present HI observations of the Sculptor group starburst spiral galaxy NGC 253, obtained with the Karoo Array Telescope (KAT-7). KAT-7 is a pathfinder for the Square Kilometre Array precursor MeerKAT, under construction. The short baselines and low system temperature of the telescope make it very sensitive to large-scale, low-surface-brightness emission. The KAT-7 observations detected 33 per cent more flux than previous Very Large Array observations, mainly in the outer parts and in the halo for a total HI mass of 2.1±0.1x109 M. HI can be found at large distances perpendicular to the plane out to projected distances of ∼ 9-10 kpc away from the nucleus and ∼ 13-14 kpc at the edge of the disc. A novel technique, based on interactive profile fitting, was used to separate the main disc gas from the anomalous (halo) gas. The rotation curve (RC) derived for the HI disc confirms that it is declining in the outer parts, as seen in previous optical Fabry-Perot measurements. As for the anomalous component, its RC has a very shallow gradient in the inner parts and turns over at the same radius as the disc, kinematically lagging by 100 km/s. The kinematics of the observed extra-planar gas is compatible with an outflow due to the central starburst and galactic fountains in the outer parts. However, the gas kinematics shows no evidence for inflow. Analysis of the near-IR WISE data, shows clearly that the star formation rate is compatible with the starburst nature of NGC 253.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): techniques: interferometric - galaxies: haloes - galaxies: individual: NGC 253 - galaxies: kinematics and dynamics - galaxies: starburst

Simbad objects: 36

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Number of rows : 36
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NGC 55 GiG 00 14 53.602 -39 11 47.86 8.54 8.58 7.87 7.84   ~ 723 2
2 NAME Magellanic Stream HVC 00 32 -30.0           ~ 855 1
3 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11446 1
4 NGC 247 LSB 00 47 08.554 -20 45 37.44 10.11 9.61 9.10 8.87   ~ 389 2
5 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3049 2
6 NGC 300 GiG 00 54 53.4460065856 -37 41 03.182962667 8.83 8.69 8.13 7.46   ~ 1368 2
7 NAME Scl Group GrG 01 00 06 -33 44.2           ~ 475 0
8 M 33 GiG 01 33 50.904 +30 39 35.79 6.17 6.27 5.72     ~ 5343 1
9 M 74 G 01 36 41.772 +15 47 00.46 10.52 10.00 9.46 9.16   ~ 1488 1
10 NGC 891 H2G 02 22 32.907 +42 20 53.95 11.08 10.81 9.93 7.86   ~ 1567 2
11 NGC 1482 GiP 03 54 38.928 -20 30 08.82 13.15 13.14 12.15 11.29   ~ 264 2
12 ICRF J052109.8+163822 Sy1 05 21 09.88592749 +16 38 22.0517668   19.37 18.84 18.480   ~ 779 1
13 NGC 2403 AGN 07 36 51.396 +65 36 09.17 9.31 8.84 8.38 8.19   ~ 1654 1
14 2MASX J08365157-4337407 G 08 36 42.1 -43 38 07           ~ 21 0
15 NGC 2997 GiG 09 45 38.7537949543 -31 11 27.357027761   9.97 9.41 8.84 9.9 ~ 390 0
16 NAME M 81-82 Group GrG 09 55 +69.1           ~ 654 0
17 M 81 Sy2 09 55 33.17306143 +69 03 55.0609270   7.89 6.94     ~ 4081 5
18 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5482 6
19 NGC 3079 Sy2 10 01 57.80342 +55 40 47.2428 11.57 11.54 10.86     ~ 1293 3
20 NGC 3109 G 10 03 06.877 -26 09 34.46 11.10 10.42 10.04 9.91   ~ 711 2
21 NGC 3077 GiP 10 03 19.0965510921 +68 44 01.556166166 11.23 10.85 10.14 9.74   ~ 708 0
22 NGC 3198 EmG 10 19 54.990 +45 32 58.88 10.83 10.87 10.33     ~ 839 1
23 NAME Magellanic Leading Arm reg 11 26 -82.0           ~ 80 0
24 NGC 3938 GiG 11 52 49.453 +44 07 14.63 10.80 10.90 10.38     ~ 486 1
25 NGC 4244 GiG 12 17 29.659 +37 48 25.60   10.71   9.99   ~ 522 1
26 NGC 4559 H2G 12 35 57.6399424116 +27 57 35.859639262   10.46 10.01     ~ 557 1
27 NGC 4565 LIN 12 36 20.804 +25 59 14.61   13.61 12.43     ~ 898 0
28 NGC 4631 GiP 12 42 08.009 +32 32 29.44   9.78 9.19 9.10   ~ 999 2
29 M 51 GiP 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 3958 4
30 M 83 SBG 13 37 00.919 -29 51 56.74 8.85 8.11 7.52 7.21   ~ 2318 2
31 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 1059 2
32 NGC 5775 GiP 14 53 57.653 +03 32 40.10   13.0 11.34     ~ 407 2
33 M 102 SyG 15 06 29.561 +55 45 47.91 11.12 10.74 9.89     ~ 511 3
34 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1469 0
35 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2326 2
36 NGC 7793 GiG 23 57 49.7533807411 -32 35 27.708304655 10.26 9.74 9.28 9.06 9.7 ~ 976 2

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2021.09.26-07:45:15

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