Studying the kinematic asymmetries of disks and post-coalescence mergers using a new “kinemetry” criterion

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Volume 542 (June 2012)

A&A, 542 (2012) A54

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Table 3

Kinematic parameters for the sample.

Galaxy ID	Type of fitting^a	i^b	v_c^c	σ_c^d	v_c/σ_c	v_shear^e	Σ^f	v_shear/Σ	R_eff	M_dyn
IRAS code		degree	(km s^-1)	(km s^-1)		(km s^-1)	(km s^-1)		(kpc)	(M_⊙)

F11255-4120	1c	53° ± 7°	187 ± 34	104 ± 7	1.8 ± 0.5
F11255-4120	2c	53° ± 7°	188 ± 37	83 ± 6	2.3 ± 0.6	125	47	2.7	2.40 ± 0.57	(2.9 ± 1.0) × 10¹⁰
F10567-4310	1c	36° ± 4°	253 ± 32	56 ± 3	4.5 ± 0.8
F10567-4310	2c	36° ± 4°	255 ± 30	50 ± 2	5.1 ± 0.8	120	41	3	3.20 ± 0.40	(1.4 ± 0.3) × 10¹⁰
F04315-0840	1c	n.c.	157 ± 3	110 ± 11	1.4 ± 0.2
F04315-0840	2c	n.c.	162 ± 3	69 ± 6	2.4 ± 0.3	132	65	2	0.94 ± 0.14	(0.8 ± 0.3) × 10¹⁰
F04315-0840	1c	29° ± 3°	324 ± 39	110 ± 11	3.0 ± 0.7
F04315-0840	2c	29° ± 3°	335 ± 40	69 ± 6	4.9 ± 1.0	132	65	2	0.94 ± 0.14	(0.8 ± 0.3) × 10¹⁰
F21453-3511	1c	n.c.	90 ± 6	69 ± 8	1.30 ± 0.24
F21453-3511	2c	n.c.	78 ± 5	61 ± 4	1.28 ± 0.17	51	51	~1	2.97 ± 0.82	(1.9 ± 0.8) × 10¹⁰
F21453-3511	1c	24° ± 2°	222 ± 33	69 ± 8	3.2 ± 0.9
F21453-3511	2c	24° ± 2°	192 ± 28	61 ± 4	3.2 ± 0.7	51	51	~1	2.97 ± 0.82	(1.9 ± 0.8) × 10¹⁰

Notes.

^(a)

One-component fitting (1c) and two-component fitting (2c, referees to the main (systemic) component of the two-Gaussian fit) are considered for the four galaxies.

^(b)

Inclination of the galaxy; n.c. is when no inclination correction is applied.

^(c)

Circular velocity derived as the half of the observed peak-to-peak velocity from the Hα kinematic data. The errors are computed as the root mean square of the sum of the variances computed in an area of 4 × 4 spaxels around the two peaks (maximum and minimum) of the velocity field map. An additional mean error of 5 − 7 km s^-1 can be added when calibration errors are considered (see Table 2). Corrected and non-corrected values for the inclination are shown.

^(d)

Central velocity dispersion as derived from the σ_Hα maps. These errors are computed as done for the velocity field map. In this case, the calibration errors are on the order of 3 − 4 km s^-1.

^(e)

Velocity shear uncorrected for the inclination of the galaxy.

^(f)

Global velocity dispersion of the whole galaxy.

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