2007ApJ...670L..97E

Query : 2007ApJ...670L..97E

2007ApJ...670L..97E - Astrophys. J., 670, L97-L100 (2007/December-1)

Variation of Galactic bar length with amplitude and density as evidence for bar growth over a Hubble time.

ELMEGREEN B.G., ELMEGREEN D.M., KNAPEN J.H., BUTA R.J., BLOCK D.L. and PUERARI I.

Abstract (from CDS):

Ks-band images of 20 barred galaxies show an increase in the peak amplitude of the normalized m=2 Fourier component with the R25-normalized radius at this peak. This implies that longer bars have higher m=2 amplitudes. The long bars also correlate with an increased density in the central parts of the disks, as measured by the luminosity inside 0.25R25 divided by the cube of this radius in kpc. Because denser galaxies evolve faster, these correlations suggest that bars grow in length and amplitude over a Hubble time, with the fastest evolution occurring in the densest galaxies. All but three of the sample have early-type flat bars; there is no clear correlation between the correlated quantities and the Hubble type.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Spiral - Galaxies: Structure

Simbad objects: 21

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Number of rows : 21
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 NGC 175 Sy2 00 37 21.5488991448 -19 56 03.358974336   12.95   11.73 12.4 ~ 110 0
2 NGC 521 LSB 01 24 33.7729923840 +01 43 52.911826680   12.5   12.3 12.0 ~ 115 0
3 NGC 613 AGN 01 34 18.235 -29 25 06.56   10.77 12.71 9.50 10.6 ~ 446 3
4 NGC 986 Sy1 02 33 34.3087856832 -39 02 42.128176704 11.72 11.74 10.91 10.10 11.3 ~ 192 2
5 NGC 4593 Sy1 12 39 39.4435107024 -05 20 39.034988448   13.95 13.15     ~ 1179 0
6 NGC 5101 Sy1 13 21 46.242 -27 25 49.87   11.26 10.47 9.87 10.5 ~ 187 0
7 IC 4290 EmG 13 35 19.5810908304 -28 01 18.468672564   14.24   13.51 13.2 ~ 49 0
8 NGC 5335 GiG 13 52 56.5556843712 +02 48 51.317742384   14.5       ~ 51 0
9 NGC 5365 EmG 13 57 50.6471346672 -43 55 52.412864052   12.20 11.14 10.57   ~ 61 0
10 NGC 6221 Sy2 16 52 46.329 -59 13 00.99   10.90 13.45 9.68 10.4 ~ 328 0
11 Z 54-29 AG? 17 28 08.9372034384 +07 25 20.329142484   15.00       ~ 74 1
12 NGC 6782 Sy2 19 23 57.9062029800 -59 55 20.952769044   12.70 11.84 11.27 11.7 ~ 127 1
13 NGC 6907 AG? 20 25 06.63 -24 48 33.0   11.91 11.30 10.47 11.3 ~ 189 2
14 IC 5092 GiG 21 16 14.5030302408 -64 27 52.583392836   12.78   11.54 11.9 ~ 48 0
15 NGC 7155 GiG 21 56 09.7223937264 -49 31 19.151284332   13.01 11.83 11.54   ~ 53 0
16 IC 1438 Sy1 22 16 29.0893049880 -21 25 50.454727752   12.63   11.57   ~ 91 0
17 NGC 7329 GiG 22 40 24.2270495112 -66 28 44.236013736   12.51 11.31 11.07 11.7 ~ 111 0
18 NGC 7513 EmG 23 13 14.0669738568 -28 21 27.280137168   12.73   11.40   ~ 94 0
19 NGC 7552 Sy1 23 16 10.66 -42 35 04.7 11.34 11.22 10.57 10.08 11.1 ~ 574 3
20 NGC 7582 Sy2 23 18 23.60 -42 22 13.3 11.62 10.92 10.62     ~ 978 3
21 NAME Galactic Bar reg ~ ~           ~ 1458 0

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