2007ApJ...659L.121C

Query : 2007ApJ...659L.121C

2007ApJ...659L.121C - Astrophys. J., 659, L121-L124 (2007/April-3)

The bar pattern speed of dwarf galaxy NGC 4431.

CORSINI E.M., AGUERRI J.A.L., DEBATTISTA V.P., PIZZELLA A., BARAZZA F.D. and JERJEN H.

Abstract (from CDS):

We present surface photometry and stellar kinematics of NGC 4431, a barred dwarf galaxy in the Virgo Cluster undergoing a tidal interaction with one of its neighbors, NGC 4436. We measured its bar pattern speed using the Tremaine-Weinberg method and derived the ratio of the corotation radius, DL, to the bar semimajor axis, aB. We found DL/aB=0.6+1.2–0.4 at 99% confidence level. Albeit with large uncertainty, the probability that the bar ends close to its corotation radius (i.e., 1.0≤DL/aB≤1.4) is about twice as likely as that the bar is much shorter than the corotation radius (i.e., DL/aB>1.4).

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Journal keyword(s): Galaxies: Elliptical and Lenticular, cD - galaxies: individual (NGC 4431) - Galaxies: Kinematics and Dynamics - Galaxies: Photometry - Galaxies: Structure

Simbad objects: 6

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Number of rows : 6
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 1023 AG? 02 40 24.0133575864 +39 03 47.663392896 10.91 10.35 9.35 7.83   ~ 689 2
2 NGC 2915 AG? 09 26 11.532 -76 37 34.75 13.13 12.93 12.68 11.90 12.8 ~ 371 2
3 NGC 4431 GiP 12 27 27.3817521552 +12 17 25.041554808 14.17 13.74 12.89     ~ 171 2
4 NGC 4436 GiP 12 27 41.2343736168 +12 18 57.193481304 14.20 13.91 12.98     ~ 138 1
5 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
6 BD+08 2613 * 12 32 10.3667298072 +07 38 20.994723168   10.49 9.81     G0 7 0

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