Table 3: Calculated and observed column densities (cm-2) in ${\zeta }$ Persei.
Species Diffuse Phase Dense Phase Total Observation
H(1) 3.5(20) 1.4(17) 3.5(20) 5.7(20) 7.1(20)
H2(2) 4.5(20) 1.1(19) 4.6(20) 3.2(20) 7.1(20)
HD(3) 1.5(16) 3.9(13) 1.5(16) 2.0(15) 1.1(16)
C+(4) 1.6(17) 1.2(15) 1.6(17) 1.8(17)  
C(3) 1.4(15) 1.6(15) 2.8(15) 2.9(15) 3.6(15)
CO(5) 3.5(14) 7.9(13) 4.2(14) 5.4(14) -
CH(6) 2.4(12) 5.6(12) 8.0(12) 1.9(13) 2.0(13)
CH+(7) 2.2(10) 2.7(08) 2.2(10) 3.5(12) -
C2(8) 1.9(11) 1.9(13) 1.9(13) 1.6(13) 2.2(13)
C3(9) 3.1(08) 2.1(12) 2.1(12) 1.0(12)  
CN(10) 6.6(10) 1.9(12) 1.9(12) 2.7(12) 3.3(12)
NH(11) 3.5(11) 1.2(09) 3.5(11) 9.0(11) -
O(12) 4.0(17) 7.2(15) 4.0(17) 0.2(18) 1.0(18)
OH (13) 4.9(13) 1.1(09) 4.9(13) 4.0(13) -
H3+(14) 2.9(13) 5.0(09) 2.9(13) 8.0(13) -
S+(3) 2.3(16) 4.1(14) 2.3(16) 1.7(16) 2.3(16)
S(3) 3.7(13) 1.0(13) 4.7(13) 1.5(13) 2.2(13)
Si+(3) 3.6(16) 6.5(14) 3.6(16) 2.8(16) 6.6(16)
H2 (J = 0)(2) 3.0(20) 1.1(19) 3.0(20) 2.2(20) 4.8(20)
H2 (J = 1)(2) 1.5(20) 1.8(17) 1.5(20) 1.0(20) 2.3(20)
H2 (J = 2)(3) 1.9(17) 4.7(13) 2.0(17) 1.1(18) 2.4(18)
H2 (J = 3)(3) 3.9(15) 2.8(13) 3.9(15) 2.0(16) 9.6(16)
H2 (J = 4)(3) 3.0(14) 2.5(13) 3.2(14) 1.1(15) 2.0(15)
H2 (J = 5)(3) 1.2(14) 8.0(12) 1.3(14) 2.3(14) 2.8(14)
Ionization fraction 2.2(-4) 1.0(-04)      
Length 4.2 pc 76 AU      
$A_{\rm V}$ 0.69 0.013 0.70    

1 Bohlin (1975).
2 Savage et al. (1977).
3 Snow (1977) but upper limits reanalyzed here with updated f values (see text)
$\;\;$for H2 $J \ge 2$ and for HD using b= 2.5 km s-1.
4 Cardelli et al. (1996).
5 Snow (1977), with updated f-values from van Dishoeck & Black (1986).
6 Jura & Meyer (1985).
7 Federman (1982).
8 Danks & Lambert (1983) - reanalyzed by van Dishoeck & Black (1989).
9 Maier et al. (2001).
10 Meyer & Jura (1985).
11 Meyer & Roth (1991).
12 van Dishoeck & Black (1986).
13 Felenbok & Roueff (1996).
14 McCall et al. (2003).


Source LaTeX | All tables | In the text