Cosmic rays, gas and dust in nearby anticentre clouds - I. CO-to-H2 conversion factors and dust opacities

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Table E.1

Estimates of the average X_CO factor in units of 10²⁰ cm^-2 (K km s^-1)^-1.

γ-ray telescope	Location	X_CO factor	Reference

	Large Galactic scales

COS-B	1st quadrant	2.5^a	Lebrun et al. (1983)
COS-B	Galactic disc	2.3^a	Bloemen et al. (1986)
COS-B	Galactic disc	2.3 ± 0.3	Strong et al. (1988)
EGRET	Galactic disc	1.9 ± 0.2	Strong & Mattox (1996)
EGRET	Galactic disc	1.56 ± 0.05	Hunter et al. (1997)
EGRET	5°< \| b \| < 80°	1.74 ± 0.03	Grenier et al. (2005)
EGRET	Local arm 3rd quadrant	1.64 ± 0.31	Digel et al. (2001)
Fermi-LAT	Local arm 2nd quadrant	1.59 ± 0.17	Abdo et al. (2010)
Fermi-LAT	Local arm Cygnus	1.68 ± 0.05	Ackermann et al. (2012d)
Fermi-LAT	Local arm 3rd quadrant	2.08 ± 0.11	Ackermann et al. (2011)
Fermi-LAT	between the Local and Perseus arms	1.93 ± 0.16	Ackermann et al. (2011)
Fermi-LAT	Perseus arm	1.9 ± 0.2	Abdo et al. (2010)

	Nearby clouds

COS-B	Oph-Sag	0.9 ± 0.4 ^a	Lebrun & Huang (1984)
COS-B	Orion	2.1 ± 1.0 ^a	Bloemen et al. (1984)
EGRET	Oph	1.1 ± 0.2	Hunter et al. (1994)
EGRET	Orion	1.35 ± 0.15	Digel et al. (1999)
EGRET	Cepheus	0.92 ± 0.14	Digel et al. (1996)
EGRET	Taurus	1.08 ± 0.10	Digel & Grenier (2001)
Fermi-LAT	Orion	1.21 ± 0.02	Ackermann et al. (2012b)
Fermi-LAT	Cepheus & Cassiopeia	0.87 ± 0.05	Abdo et al. (2010)
Fermi-LAT	Cepheus & Polaris	0.63 ± 0.02	Ackermann et al. (2012c)
Fermi-LAT	RCrA	0.99 ± 0.08	Ackermann et al. (2012c)
Fermi-LAT	Chamaeleon	0.69 ± 0.02	Planck Collaboration Int. XXVIII (2015)
Fermi-LAT	10°< \| b \| < 70°	0.902 ± 0.007	Casandjian (2015)

Notes.

^(a)

Corrected to absolute CO radiation temperatures according to Bronfman et al. (1988).

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