2002A&A...391...83B


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST07:56:10

2002A&A...391...83B - Astronomy and Astrophysics, volume 391, 83-102 (2002/8-3)

Magnetic fields in barred galaxies. I. The atlas.

BECK R., SHOUTENKOV V., EHLE M., HARNETT J.I., HAYNES R.F., SHUKUROV A., SOKOLOFF D.D. and THIERBACH M.

Abstract (from CDS):

The total and polarized radio continuum emission of 20 barred galaxies was observed with the Very Large Array (VLA) at λ3, 6, 18 and 22 cm and with the Australia Telescope Compact Array (ATCA) at λ6 cm and 13 cm. Maps at 30'' angular resolution are presented here. Polarized emission (and therefore a large-scale regular magnetic field) was detected in 17 galaxies. Most galaxies of our sample are similar to non-barred galaxies with respect to the radio/far-infrared flux correlation and equipartition strength of the total magnetic field. Galaxies with highly elongated bars are not always radio-bright. We discuss the correlation of radio properties with the aspect ratio of the bar and other measures of the bar strength. We introduce a new measure of the bar strength, Λ, related to the quadrupole moment of the bar's gravitational potential. The radio surface brightness I of the barred galaxies in our sample is correlated with Λ, I∝Λ0.4±0.1, and thus is highest in galaxies with a long bar where the velocity field is distorted by the bar over a large fraction of the disc. In these galaxies, the pattern of the regular field is significantly different from that in non-barred galaxies. In particular, field enhancements occur upstream of the dust lanes where the field lines are oriented at large angles to the bar's major axis. Polarized radio emission seems to be a good indicator of large-scale non-axisymmetric motions.

Abstract Copyright:

Journal keyword(s): atlases - galaxies: magnetic fields - galaxies: spiral - galaxies: structure - ISM: magnetic fields

Simbad objects: 22

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Number of rows : 22

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NGC 986 EmG 02 33 34.349 -39 02 42.21 11.72 11.74 10.91 10.10 11.3 ~ 167 1
2 NGC 1097 LIN 02 46 19.059 -30 16 29.68 10.46 9.97 9.48 8.72 9.8 ~ 1172 3
3 NGC 1313 G 03 18 16.046 -66 29 53.74   10.06 10.0 9.40 10.4 ~ 605 2
4 NGC 1300 GiP 03 19 41.0453355271 -19 24 40.141850719   11.16 10.42 9.90 10.7 ~ 439 0
5 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1523 2
6 NGC 1433 GiG 03 42 01.553 -47 13 19.49   10.84 9.99 9.61 10.2 ~ 304 0
7 NGC 1493 GiP 03 57 27.4264391853 -46 12 38.528237475   11.88   11.01 11.6 ~ 116 0
8 NGC 1559 GiG 04 17 35.7501219046 -62 47 01.225146009   11.19 10.45 10.11 10.4 ~ 228 1
9 NGC 1672 SyG 04 45 42.552 -59 14 50.68 10.29 10.53 9.68 9.53 10.2 ~ 315 1
10 NGC 2336 GiP 07 27 04.050 +80 10 41.05   13.46 12.51     ~ 222 0
11 NGC 2442 LIN 07 36 23.842 -69 31 50.96 11.47 11.15 10.42 9.71 10.4 ~ 183 1
12 NGC 3059 G 09 50 08.181 -73 55 19.96   11.56 11.24 10.66 11.5 ~ 71 0
13 NGC 3359 EmG 10 46 36.845 +63 13 25.10 10.83 11.03 10.57     ~ 339 1
14 NGC 3953 GiG 11 53 49.0087614111 +52 19 36.473777126   11.08   9.71   ~ 310 0
15 M 109 GiG 11 57 35.984 +53 22 28.27   10.94   9.57   ~ 415 0
16 NGC 4535 H2G 12 34 20.310 +08 11 51.94   11.1       ~ 520 0
17 NGC 5068 G 13 18 54.807 -21 02 20.76 11.24 10.53 10.01 9.78 10.1 ~ 210 0
18 M 83 SBG 13 37 00.919 -29 51 56.74 8.85 8.11 7.52 7.21   ~ 2228 2
19 NGC 5643 Sy2 14 32 40.778 -44 10 28.60   11.03 13.60 9.92 10.6 ~ 450 0
20 NGC 7479 Sy2 23 04 56.668 +12 19 22.36 11.74 11.60 10.85 10.47 9.66 ~ 664 2
21 NGC 7552 GiP 23 16 10.767 -42 35 05.39 11.34 11.22 10.57 10.08 11.1 ~ 506 3
22 SCG2 2315-4241 CGG 23 16 10.800 -42 35 05.00   11.34       ~ 18 0

    Equat.    Gal    SGal    Ecl

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2020.07.04-07:56:10

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