Deciphering the radio star formation correlation on kpc scales - I. Adaptive kernel smoothing experiments

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Volume 633 (January 2020)

A&A, 633 (2020) A144

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Table 2.

Ratio between smoothing lengthscales at 20 cm and 6 cm.

Gaussian convolution

Name	Polarization ^(a)	l_20 cm/l_6 cm	l_20 cm/l_6 cm	CR transport	l_20 cm/l_6 cm	CR transport
		(“best fit”)		(with losses)		(without losses)
NGC 6946		2.2	1.19 ± 0.21	Diffusion	1.26 ± 0.26	Diffusion
NGC 6946 low resolution		10.7	2.02 ± 0.64	Streaming	1.46 ± 0.55	Diffusion
M 51		1.8	1.55 ± 0.33	Diffusion	1.52 ± 0.33	Diffusion
M 51 low resolution		2.3	1.73 ± 0.29	Streaming	1.75 ± 0.30	Streaming
NGC 4321		1.1	1.17 ± 0.24	Diffusion	1.17 ± 0.24	Diffusion
NGC 4321 disk		2.2	2.89 ± 0.50	Streaming	2.21 ± 0.42	Streaming
NGC 4303	POL	2.4	1.21 ± 0.33	Diffusion	1.89 ± 0.38	Streaming
NGC4535	POL	2.2	2.58 ± 0.59	Streaming	2.29 ± 0.55	Streaming
NGC 4535 VIVA	POL	1.2	1.56 ± 0.34	Diffusion	1.44 ± 0.36	Diffusion
NGC 4254	POL	2.0	1.69 ± 0.27	Streaming	2.11 ± 0.36	Streaming
NGC 4501	POL	1.7	1.72 ± 0.60	Streaming	1.72 ± 0.60	Streaming
NGC 4654	POL	2.7	2.26 ± 0.61	Streaming	2.28 ± 0.64	Streaming

Exponential convolution

NGC 6946		3.0	0.73 ± 0.18	Diffusion	0.83 ± 0.26	Diffusion
NGC 6946 low resolution		8.8	0.98 ± 0.29	Streaming	1.14 ± 0.34	Diffusion
M 51		2.0	1.79 ± 0.53	Streaming	1.95 ± 0.51	Streaming
M 51 low resolution		4.1	1.74 ± 0.40	Streaming	1.86 ± 0.49	Streaming
NGC 4321		1.0	1.24 ± 0.38	Diffusion	1.24 ± 0.38	Diffusion
NGC 4321 disk		2.0	2.84 ± 0.94	Streaming	2.00 ± 0.74	Streaming
NGC 4303	POL	2.3	1.22 ± 0.36	Diffusion	2.11 ± 0.60	Streaming
NGC 4535	POL	2.5	2.60 ± 0.56	Streaming	2.67 ± 0.87	Streaming
NGC 4535 VIVA	POL	1.5	1.57 ± 0.31		1.44 ± 0.31	Diffusion
NGC 4254	POL	3.0	1.74 ± 0.48	Streaming	2.41 ± 0.87	Streaming
NGC 4501	POL	1.5	1.45 ± 0.85	Diffusion	1.25 ± 0.81	Diffusion
NGC 4654	POL	1.0	1.45 ± 0.79	Diffusion	1.42 ± 0.78	Diffusion

Notes.

^(a)

Increased source term proportional to the degree of polarization.

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