Gas compression and stellar feedback in the tidally interacting and ram-pressure stripped Virgo spiral galaxy NGC 4654

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Volume 645 (January 2021)

A&A, 645 (2021) A111

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Table 3.

Sets of parameters obtained from χ²-minimization to fit the observation profiles with the analytical model.

	#	X_CO	δ	Q	Ṁ	γ₀	ξ		⁽¹⁾	⁽²⁾	Q^min⁽³⁾

												DISK ⁽⁴⁾				NW ⁽⁵⁾
1	(a)	–	6.6	1.7	0.17	–	–	–	10.6	19.5	1.26	3.3	1.0	1.0	1.3	5.6	3.7	1.0	0.9
	(b)	×2								13.5	0.64					4.7	0.8	1.4	2.4

2	(a)	–	5.7	1.5	0.10	–	–	×2	8.7	18.0	1.20	3.1	0.9	1.1	1.1	3.2	0.8	0.8	1.6
	(b)	×2								12.0	0.58					3.7	1.1	1.7	1.0

3	(a)	–	4.8	1.6	0.11	–	×2	–	10.0	19.8	1.23	3.0	0.9	1.0	1.0	4.1	0.9	1.1	2.1
	(b)	×2								12.0	0.50					2.6	1.1	0.8	0.8

4	(a)	–	11.1	1.6	0.13	×2	–	–	9.4	18.8	1.25	3.1	1.0	1.1	1.0	8.0	1.0	0.9	6.0
	(b)	×2								11.1	0.42					4.8	3.2	0.8	0.8

5	(a)	–	5.7	1.8	0.17	–	×2	×2	11.2	20.5	1.28	2.9	0.9	1.1	0.9	7.9	0.8	0.9	6.2
	(b)	×2								14.1	0.57					4.9	2.8	0.8	1.3

6	(a)	–	10.2	1.9	0.22	×2	×2	–	12.1	20.1	1.29	4.0	1.5	1.1	1.3	12.9	0.8	0.8	11.2
	(b)	×2								14.2	0.44					7.2	5.5	0.9	0.8

7	(a)	–	11.1	1.5	0.13	×2	–	×2	9.1	18.0	1.30	3.8	1.5	1.1	1.1	11.9	1.1	1.6	9.3
	(b)	×2								10.7	0.40					6.7	4.4	0.8	1.4

Notes.

⁽¹⁾

Mean velocity dispersion in the unperturbed disk.

⁽²⁾

Maximum velocity dispersion reached in the high H I surface density region.

⁽³⁾

Minimum Toomre Q reached in the high H I surface density region.

⁽⁴⁾

χ² obtained for the southeastern unperturbed disk.

⁽⁵⁾

χ² obtained for the northwestern perturbed disk. The bold characters correspond to the models with the lowest total χ² for a galactic conversion factor and a modified conversion factor .

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