Wide-field CO isotopologue emission and the CO-to-H2 factor across the nearby spiral galaxy M101

Open Access

Table 4.

Median α_{¹²CO(1−0)} values for M101 and M51.

	M101			M51
α_{¹²CO(1−0)}^(a):	binned ^(b)	num. weighted ^(c)	lum. weighted ^(d)	binned ^(b)	num. weighted ^(c)	lum. weighted ^(d)
All
Center ^(e)	0.43			3.1
Disk

Notes.

^(a)

Conversion factor in units M_⊙ pc⁻² (K km s⁻¹),

^(b)

binning together all the datapoints. Uncertainty represents the binned propagated uncertainty.

^(c)

Median with 16th and 84th percentile scatter.

^(d)

¹²CO(1–0) intensity weighted median with 16th and 84th percentile scatter.

^(e)

Center consists only of one solution pixel.

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