HI within and around observed and simulated galaxy discs - Comparing MeerKAT observations with mock data from TNG50 and FIRE-2

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Table 2.

Characteristic parameters for the H I datacubes of the observed and simulated galaxy samples.

Parameter	Unit	HR	LR
Field of view ^(a)	°	∼1	∼1
	kpc	∼350	∼350
Beam size ^(b)	″	26.4 × 18.2	65.3 × 64.0
	kpc	2.6 × 1.8	6.3 × 6.2
Beam PA	°	136	92
Pixel size	″	5	20
	kpc	0.5	1.9
Velocity range	km s⁻¹	±500	±500
Channel width ^(c)	km s⁻¹	1.4	1.4
σ_rms per channel	mJy beam⁻¹	0.15	0.25
Minimum N_HI^(d)	cm⁻²	5 × 10¹⁸	1 × 10¹⁸

Notes.

^(a)

Corresponding to the FWHM of the MeerKAT primary beam.

^(b)

Sizes in kpc are based on a distance of 20 Mpc.

^(c)

J0342-47 cubes have a different channel width of 5.5 km s⁻¹.

^(d)

3σ sensitivity integrated over 16 km s⁻¹. With respect to the values listed here, the rms noise per channel and the minimum detectable N_HI for J0342-47 are larger by 18 per cent (see text).

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