1999AJ....118..126B


Query : 1999AJ....118..126B

1999AJ....118..126B - Astron. J., 118, 126-138 (1999/July-0)

The nature of boxy/peanut-shaped bulges in spiral galaxies.

BUREAU M. and FREEMAN K.C.

Abstract (from CDS):

We present a systematic observational study of the relationship between bars and boxy/peanut-shaped (B/PS) bulges. We first review and discuss proposed mechanisms for their formation, focusing on accretion and bar-buckling scenarios. Using new methods relying on the kinematics of edge-on disks, we then look for bars in a large sample of edge-on spiral galaxies with a B/PS bulge and in a smaller control sample of edge-on spirals with more spheroidal bulges. We present position-velocity diagrams of the ionized gas obtained from optical long-slit spectroscopy. We show that almost all B/PS bulges are due to a thick bar viewed edge-on, while only a few extreme cases may be due to the accretion of external material. This strongly supports the bar-buckling mechanism for the formation of B/PS bulges. None of the galaxies in the control sample show evidence for a bar, which suggests conversely that bars are generally B/PS.We consider the effects of dust in the disk of the galaxies but conclude that it does not significantly affect our results. Unusual emission-line ratios correlating with kinematical structures are observed in many objects, and we argue that this is consistent with the presence of strong bars in the disk of the galaxies. As expected from N-body simulations, the boxy-peanut transition appears to be related to the viewing angle, but more work is required to derive the precise orientation of the bars in the bulges. The reliable identification of bars in edge-on spiral galaxies opens up for the first time the possibility of studying observationally the vertical structure of bars.

Abstract Copyright:

Journal keyword(s): Galaxies: Evolution - Galaxies: Formation - Galaxies: Kinematics and Dynamics - Galaxies: Spiral - Galaxies: Structure

Simbad objects: 32

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Number of rows : 32
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 NGC 128 GiG 00 29 15.0429950112 +02 51 50.564329164   13.2       ~ 198 0
2 ESO 151-4 G 00 56 07.33 -53 11 27.6   14.85   13.07   ~ 19 0
3 NGC 1032 G 02 39 23.6 +01 05 38   13.2       ~ 91 1
4 NGC 1381 GiP 03 36 31.6592184144 -35 17 42.739221912 12.90 12.47 11.50 11.02   ~ 238 1
5 NGC 1596 GiP 04 27 38.1079224792 -55 01 39.852944076   12.01 10.97 10.54   ~ 114 0
6 NGC 1886 EmG 05 21 48.1563158664 -23 48 36.315007812   13.62   12.28   ~ 74 0
7 NGC 2310 G 06 53 53.9856718776 -40 51 45.766145412 13.20 12.68 11.76 11.16   ~ 75 1
8 ESO 311-12 G 07 47 34.050 -41 27 07.71   12.83   11.14   ~ 40 0
9 NGC 2788A AGN 09 02 39.4880829000 -68 13 36.653289168   13.98   12.33   ~ 68 0
10 IC 2531 EmG 09 59 55.6140265128 -29 37 04.575809208   13.19   11.54 12.1 ~ 137 1
11 NGC 3203 GiG 10 19 33.8163340224 -26 41 55.783685292   13.22   11.65   ~ 62 0
12 NGC 3390 LIN 10 48 04.343 -31 32 00.04   13.24 13.41 11.43   ~ 82 0
13 NGC 3957 GiG 11 54 01.5349526640 -19 34 08.004900504   13.00   11.42   ~ 85 0
14 NGC 4442 GiG 12 28 03.8815318272 +09 48 13.426522272   11.2       ~ 275 0
15 NGC 4469 GiG 12 29 27.997 +08 45 00.63   12.6       ~ 162 0
16 NGC 4703 GiG 12 49 18.9608997312 -09 06 30.518470296   14.5       ~ 39 0
17 NGC 4710 H2G 12 49 38.958 +15 09 55.76   11.6       ~ 300 0
18 MCG-01-33-071 GiG 13 01 49.5420859728 -08 20 10.039392456   14.0   12.85 13.3 ~ 49 0
19 ESO 443-42 GiG 13 03 29.7234464952 -29 49 43.429524960   14.01   12.53   ~ 74 0
20 NGC 5084 LIN 13 20 16.923 -21 49 39.28   11.15 12.21 9.84 10.5 ~ 173 0
21 NGC 5746 GiP 14 44 56.005 +01 57 17.06   12.3       ~ 344 0
22 NGC 5965 LIN 15 34 02.3002830024 +56 41 08.509684740   13.4       ~ 113 0
23 IC 4767 GiG 18 47 41.6730879000 -63 24 20.291818680   14.67 12.96 13.00 12.41 ~ 77 0
24 NGC 6722 GiG 19 03 40.3875744312 -64 53 40.120010520   13.56   11.92   ~ 42 0
25 NGC 6771 GiG 19 18 39.4799507328 -60 32 46.274870724 14.17 13.41 12.52 11.97   ~ 60 1
26 ESO 185-53 GiG 20 03 01.0502950224 -55 56 52.938896496   14.33   12.68   ~ 27 0
27 IC 4937 GiG 20 05 17.563 -56 15 22.32   14.91   13.41   ~ 38 0
28 ESO 597-36 GiG 20 48 14.7948630048 -19 50 57.268042908   15.41   13.29   ~ 58 0
29 IC 5096 GiG 21 18 21.511 -63 45 38.43   13.32   11.73 12.3 ~ 62 0
30 NGC 7123 G 21 50 46.575 -70 20 03.08   13.29   11.89   ~ 43 0
31 IC 5176 G 22 14 55.928 -66 50 57.88   13.54   11.97 12.4 ~ 98 0
32 ESO 240-11 GiG 23 37 49.4188489776 -47 43 38.430144948   13.05   11.69 12.3 ~ 107 1

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2023.01.30-05:10:39

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