1998AJ....116.2154K

Query : 1998AJ....116.2154K

1998AJ....116.2154K - Astron. J., 116, 2154-2165 (1998/November-0)

A photometric method for quantifying asymmetries in disk galaxies.

KORNREICH D.A., HAYNES M.P. and LOVELACE R.V.E.

Abstract (from CDS):

A photometric method for quantifying deviations from axisymmetry in optical images of disk galaxies is applied to a sample of 32 face-on and nearly face-on spirals. The method involves comparing the relative fluxes contained within trapezoidal sectors arranged symmetrically about the galaxy center of light, excluding the bulge and/or barred regions. Such a method has several advantages over others, especially when quantifying asymmetry in flocculent galaxies. Specifically, the averaging of large regions improves the signal-to-noise in the measurements; the method is not strongly affected by the presence of spiral arms; and it identifies the kinds of asymmetry that are likely to be dynamically important. Application of this ``method of sectors'' to R-band images of 32 disk galaxies indicates that about 30% of spirals show deviations from axisymmetry at the 5 σ level.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Photometry - Galaxies: Structure - Techniques: Photometric

Simbad objects: 33

Full paper

View the references in ADS

Number of rows : 33

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	MCG+08-01-021	AG?	00 06 37.41	+47 52 37.9		16.0				~	16	0
2	NGC 600	Sy2	01 33 05.292	-07 18 41.06		13.1		13.0	12.9	~	93	0
3	NGC 991	LSB	02 35 32.6841762360	-07 09 15.862909536		12.36		12.7	12.6	~	166	1
4	NGC 1042	SyG	02 40 23.9724818544	-08 26 00.736256616	11.47	11.56	11.02	11.7	11.4	~	286	1
5	NGC 1058	Sy2	02 43 30.0264850248	+37 20 28.782851784		12.29	11.75	10.85		~	483	0
6	NGC 1073	EmG	02 43 40.598	+01 22 33.13		11.3		11.3	11.8	~	335	0
7	NGC 1302	GiG	03 19 51.2026512864	-26 03 37.946814660		11.43		9.99	10.8	~	151	0
8	NGC 1637	Sy2	04 41 28.1926876152	-02 51 28.667815488		11.4		11.0	11.3	~	444	0
9	MCG-03-14-017	LSB	05 28 14.1002801760	-16 07 28.319027880		12.7		12.12	13.1	~	35	0
10	Z 285-10	GiP	06 53 10.3954201680	+57 10 40.154257452		13.9				~	68	0
11	NGC 2326	GiG	07 08 11.0029274136	+50 40 54.835402584		14.3		11.88		~	31	0
12	Z 285-16	GiG	07 09 05.9246956320	+61 35 44.062687680		13.1				~	57	0
13	Z 286-16	AG?	07 24 27.898	+61 41 38.16		13.20	12.70	12.25	11.99	~	48	0
14	NGC 3450	EmG	10 48 03.6294924288	-20 50 56.950376100		12.72		11.34		~	55	0
15	NGC 3393	Sy2	10 48 23.4653152920	-25 09 43.487648784		13.10	13.95	11.67	12.2	~	471	1
16	NGC 3596	H2G	11 15 06.2081129496	+14 47 13.284196332		12.01	11.49	10.99	10.45	~	226	0
17	NGC 3631	AG?	11 21 02.8871865144	+53 10 10.415331660		11.0				~	385	1
18	NGC 3642	LIN	11 22 17.9010437568	+59 04 28.275641436		14.86	14.04			~	220	0
19	Z 314-25	GiG	11 25 19.0482116664	+63 43 45.222445812		14.1				~	56	0
20	NGC 3913	AG?	11 50 38.9407040280	+55 21 13.894641396		14.2				~	169	0
21	NGC 4136	GiG	12 09 17.7035859024	+29 55 39.419783832		11.69				~	244	1
22	NAME Local Supercluster	SCG	12 31	+12.4						~	566	0
23	NGC 4688	GiP	12 47 46.5220541760	+04 20 09.766119156		14.5				~	182	1
24	M 101	GiP	14 03 12.583	+54 20 55.50		8.46	7.86	7.76		~	3138	2
25	MCG-05-34-002	EmG	14 13 30.1307271096	-29 35 40.391859804		13.65		12.63	12.8	~	40	0
26	NGC 5701	GiG	14 39 11.0751915840	+05 21 48.493104264	12.03	11.76	10.88			~	247	1
27	NGC 5957	Sy2	15 35 23.2175160360	+12 02 51.281778048		13.3				~	143	0
28	Z 136-70	AG?	15 45 44.491	+20 33 38.51		14.5				~	56	0
29	NGC 7217	LIN	22 07 52.3984675584	+31 21 33.632293572		12.94	11.92			~	511	0
30	MCG-01-57-007	EmG	22 24 11.551	-03 28 58.41		14.5				~	42	0
31	MCG-01-60-011	GiG	23 36 29.8659744024	-04 54 31.257605952		13.8		13.5	13.3	~	24	0
32	Z 476-106	GiP	23 40 39.86	+26 14 11.1		14.5				~	146	0
33	NGC 7742	GiP	23 44 15.7534099368	+10 46 01.533226872		12.5				~	226	0

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