J/ApJS/168/213 Ionization states and cooling efficiencies (Gnat+, 2007)
Time-dependent ionization in radiatively cooling gas.
Gnat O., Sternberg A.
<Astrophys. J. Suppl. Ser., 168, 213-230 (2007)>
=2007ApJS..168..213G 2007ApJS..168..213G
ADC_Keywords: Atomic physics ; Abundances ; Interstellar medium ; QSOs
Keywords: atomic processes - intergalactic medium - ISM: general - plasmas -
quasars: absorption lines
Abstract:
We present new computations of the equilibrium and nonequilibrium
cooling efficiencies and ionization states for low-density radiatively
cooling gas containing the elements H, He, C, N, O, Ne, Mg, Si, S, and
Fe. We present results for gas temperatures between 104 and 108K,
assuming dust-free and optically thin conditions, and no external
radiation.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2a.dat 1019 201 Ion fractions for collisional ionization
equilibrium (CIE)
table2b.dat 1019 123 Ion fractions for isochoric cooling, Z=1
table2c.dat 1019 130 Ion fractions for isobaric cooling, Z=1
table2d.dat 1019 125 Ion fractions for isochoric cooling, Z=1e-3
table2e.dat 1019 133 Ion fractions for isobaric cooling, Z=1e-3
table2f.dat 1019 125 Ion fractions for isochoric cooling, Z=1e-2
table2g.dat 1019 133 Ion fractions for isobaric cooling, Z=1e-2
table2h.dat 1019 124 Ion fractions for isochoric cooling, Z=1e-1
table2i.dat 1019 132 Ion fractions for isobaric cooling, Z=1e-1
table2j.dat 1019 123 Ion fractions for isochoric cooling, Z=2
table2k.dat 1019 129 Ion fractions for isobaric cooling, Z=2
table4a.dat 55 201 Collisional ionization equilibrium (CIE)
cooling efficiencies
table4b.dat 55 125 Isochoric cooling efficiencies
table4c.dat 55 133 Isobaric cooling efficiencies
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Byte-by-byte Description of file: table2?.dat
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Bytes Format Units Label Explanations
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1- 11 E11.3 K T Temperature
13- 20 E8.2 --- H0/H H0 fractional abundance (G1) (1)
22- 29 E8.2 --- H+/H H+ fractional abundance (1) (G1)
31- 38 E8.2 --- He0/He He0 fractional abundance (1) (G1)
40- 47 E8.2 --- He+/He He+ fractional abundance (1) (G1)
49- 56 E8.2 --- He2+/He He2+ fractional abundance (1) (G1)
58- 65 E8.2 --- C0/C C0 fractional abundance (1) (G1)
67- 74 E8.2 --- C+/C C+ fractional abundance (1) (G1)
76- 83 E8.2 --- C2+/C C2+ fractional abundance (1) (G1)
85- 92 E8.2 --- C3+/C C3+ fractional abundance (1) (G1)
94- 101 E8.2 --- C4+/C C4+ fractional abundance (1) (G1)
103- 110 E8.2 --- C5+/C C5+ fractional abundance (1) (G1)
112- 119 E8.2 --- C6+/C C6+ fractional abundance (1) (G1)
121- 128 E8.2 --- N0/N N0 fractional abundance (1) (G1)
130- 137 E8.2 --- N+/N N+ fractional abundance (1) (G1)
139- 146 E8.2 --- N2+/N N2+ fractional abundance (1) (G1)
148- 155 E8.2 --- N3+/N N3+ fractional abundance (1) (G1)
157- 164 E8.2 --- N4+/N N4+ fractional abundance (1) (G1)
166- 173 E8.2 --- N5+/N N5+ fractional abundance (1) (G1)
175- 182 E8.2 --- N6+/N N6+ fractional abundance (1) (G1)
184- 191 E8.2 --- N7+/N N7+ fractional abundance (1) (G1)
193- 200 E8.2 --- O0/O O0 fractional abundance (1) (G1)
202- 209 E8.2 --- O+/O O+ fractional abundance (1) (G1)
211- 218 E8.2 --- O2+/O O2+ fractional abundance (1) (G1)
220- 227 E8.2 --- O3+/O O3+ fractional abundance (1) (G1)
229- 236 E8.2 --- O4+/O O4+ fractional abundance (1) (G1)
238- 245 E8.2 --- O5+/O O5+ fractional abundance (1) (G1)
247- 254 E8.2 --- O6+/O O6+ fractional abundance (1) (G1)
256- 263 E8.2 --- O7+/O O7+ fractional abundance (1) (G1)
265- 272 E8.2 --- O8+/O O8+ fractional abundance (1) (G1)
274- 281 E8.2 --- Ne0/Ne Ne0 fractional abundance (1) (G1)
283- 290 E8.2 --- Ne+/Ne Ne^+ fractional abundance (1) (G1)
292- 299 E8.2 --- Ne2+/Ne Ne2+ fractional abundance (1) (G1)
301- 308 E8.2 --- Ne3+/Ne Ne3+ fractional abundance (1) (G1)
310- 317 E8.2 --- Ne4+/Ne Ne4+ fractional abundance (1) (G1)
319- 326 E8.2 --- Ne5+/Ne Ne5+ fractional abundance (1) (G1)
328- 335 E8.2 --- Ne6+/Ne Ne6+ fractional abundance (1) (G1)
337- 344 E8.2 --- Ne7+/Ne Ne7+ fractional abundance (1) (G1)
346- 353 E8.2 --- Ne8+/Ne Ne8+ fractional abundance (1) (G1)
355- 362 E8.2 --- Ne9+/Ne Ne9+ fractional abundance (1) (G1)
364- 371 E8.2 --- Ne10+/Ne Ne10+ fractional abundance (1) (G1)
373- 380 E8.2 --- Mg0/Mg Mg0 fractional abundance (1) (G1)
382- 389 E8.2 --- Mg+/Mg Mg+ fractional abundance (1) (G1)
391- 398 E8.2 --- Mg2+/Mg Mg2+ fractional abundance (1) (G1)
400- 407 E8.2 --- Mg3+/Mg Mg3+ fractional abundance (1) (G1)
409- 416 E8.2 --- Mg4+/Mg Mg4+ fractional abundance (1) (G1)
418- 425 E8.2 --- Mg5+/Mg Mg5+ fractional abundance (1) (G1)
427- 434 E8.2 --- Mg6+/Mg Mg6+ fractional abundance (1) (G1)
436- 443 E8.2 --- Mg7+/Mg Mg7+ fractional abundance (1) (G1)
445- 452 E8.2 --- Mg8+/Mg Mg8+ fractional abundance (1) (G1)
454- 461 E8.2 --- Mg9+/Mg Mg9+ fractional abundance (1) (G1)
463- 470 E8.2 --- Mg10+/Mg Mg10+ fractional abundance (1) (G1)
472- 479 E8.2 --- Mg11+/Mg Mg11+ fractional abundance (1) (G1)
481- 488 E8.2 --- Mg12+/Mg Mg12+ fractional abundance (1) (G1)
490- 497 E8.2 --- Si0/Si Si0 fractional abundance (1) (G1)
499- 506 E8.2 --- Si+/Si Si+ fractional abundance (1) (G1)
508- 515 E8.2 --- Si2+/Si Si2+ fractional abundance (1) (G1)
517- 524 E8.2 --- Si3+/Si Si3+ fractional abundance (1) (G1)
526- 533 E8.2 --- Si4+/Si Si4+ fractional abundance (1) (G1)
535- 542 E8.2 --- Si5+/Si Si5+ fractional abundance (1) (G1)
544- 551 E8.2 --- Si6+/Si Si6+ fractional abundance (1) (G1)
553- 560 E8.2 --- Si7+/Si Si7+ fractional abundance (1) (G1)
562- 569 E8.2 --- Si8+/Si Si8+ fractional abundance (1) (G1)
571- 578 E8.2 --- Si9+/Si Si9+ fractional abundance (1) (G1)
580- 587 E8.2 --- Si10+/Si Si10+ fractional abundance (1) (G1)
589- 596 E8.2 --- Si11+/Si Si11+ fractional abundance (1) (G1)
598- 605 E8.2 --- Si12+/Si Si12+ fractional abundance (1) (G1)
607- 614 E8.2 --- Si13+/Si Si13+ fractional abundance (1) (G1)
616- 623 E8.2 --- Si14+/Si Si14+ fractional abundance (1) (G1)
625- 632 E8.2 --- S0/S S0 fractional abundance (1) (G1)
634- 641 E8.2 --- S+/S S+ fractional abundance (1) (G1)
643- 650 E8.2 --- S2+/S S2+ fractional abundance (1) (G1)
652- 659 E8.2 --- S3+/S S3+ fractional abundance (1) (G1)
661- 668 E8.2 --- S4+/S S4+ fractional abundance (1) (G1)
670- 677 E8.2 --- S5+/S S5+ fractional abundance (1) (G1)
679- 686 E8.2 --- S6+/S S6+ fractional abundance (1) (G1)
688- 695 E8.2 --- S7+/S S7+ fractional abundance (1) (G1)
697- 704 E8.2 --- S8+/S S8+ fractional abundance (1) (G1)
706- 713 E8.2 --- S9+/S S9+ fractional abundance (1) (G1)
715- 722 E8.2 --- S10+/S S10+ fractional abundance (1) (G1)
724- 731 E8.2 --- S11+/S S11+ fractional abundance (1) (G1)
733- 740 E8.2 --- S12+/S S12+ fractional abundance (1) (G1)
742- 749 E8.2 --- S13+/S S13+ fractional abundance (1) (G1)
751- 758 E8.2 --- S14+/S S14+ fractional abundance (1) (G1)
760- 767 E8.2 --- S15+/S S15+ fractional abundance (1) (G1)
769- 776 E8.2 --- S16+/S S16+ fractional abundance (1) (G1)
778- 785 E8.2 --- Fe0/Fe Fe0 fractional abundance (1) (G1)
787- 794 E8.2 --- Fe+/Fe Fe+ fractional abundance (1) (G1)
796- 803 E8.2 --- Fe2+/Fe Fe2+ fractional abundance (1) (G1)
805- 812 E8.2 --- Fe3+/Fe Fe3+ fractional abundance (1) (G1)
814- 821 E8.2 --- Fe4+/Fe Fe4+ fractional abundance (1) (G1)
823- 830 E8.2 --- Fe5+/Fe Fe5+ fractional abundance (1) (G1)
832- 839 E8.2 --- Fe6+/Fe Fe6+ fractional abundance (1) (G1)
841- 848 E8.2 --- Fe7+/Fe Fe7+ fractional abundance (1) (G1)
850- 857 E8.2 --- Fe8+/Fe Fe8+ fractional abundance (1) (G1)
859- 866 E8.2 --- Fe9+/Fe Fe9+ fractional abundance (1) (G1)
868- 875 E8.2 --- Fe10+/Fe Fe10+ fractional abundance (1) (G1)
877- 884 E8.2 --- Fe11+/Fe Fe11+ fractional abundance (1) (G1)
886- 893 E8.2 --- Fe12+/Fe Fe12+ fractional abundance (1) (G1)
895- 902 E8.2 --- Fe13+/Fe Fe13+ fractional abundance (1) (G1)
904- 911 E8.2 --- Fe14+/Fe Fe14+ fractional abundance (1) (G1)
913- 920 E8.2 --- Fe15+/Fe Fe15+ fractional abundance (1) (G1)
922- 929 E8.2 --- Fe16+/Fe Fe16+ fractional abundance (1) (G1)
931- 938 E8.2 --- Fe17+/Fe Fe17+ fractional abundance (1) (G1)
940- 947 E8.2 --- Fe18+/Fe Fe18+ fractional abundance (1) (G1)
949- 956 E8.2 --- Fe19+/Fe Fe19+ fractional abundance (1) (G1)
958- 965 E8.2 --- Fe20+/Fe Fe20+ fractional abundance (1) (G1)
967- 974 E8.2 --- Fe21+/Fe Fe21+ fractional abundance (1) (G1)
976- 983 E8.2 --- Fe22+/Fe Fe22+ fractional abundance (1) (G1)
985- 992 E8.2 --- Fe23+/Fe Fe23+ fractional abundance (1) (G1)
994-1001 E8.2 --- Fe24+/Fe Fe24+ fractional abundance (1) (G1)
1003-1010 E8.2 --- Fe25+/Fe Fe25+ fractional abundance (1) (G1)
1012-1019 E8.2 --- Fe26+/Fe Fe26+ fractional abundance (1) (G1)
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Note (1): For T<104K the electron density, and associated ion fractions,
depend on Z.
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Byte-by-byte Description of file: table4?.dat
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Bytes Format Units Label Explanations
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1- 10 E10.3 K T Temperature
12- 19 E8.2 10-13W.m+3 Lambda(Z=1e-3) Z=1e-3 cooling efficiency (G1) (1)
21- 28 E8.2 10-13W.m+3 Lambda(Z=1e-2) Z=1e-2 cooling efficiency (1) (G1)
30- 37 E8.2 10-13W.m+3 Lambda(Z=1e-1) Z=1e-1 cooling efficiency (1) (G1)
39- 46 E8.2 10-13W.m+3 Lambda(Z=1) Z=1 cooling efficiency (1) (G1)
48- 55 E8.2 10-13W.m+3 Lambda(Z=2) Z=2 cooling efficiency (1) (G1)
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Note (1): In units of erg.cm3/s.
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Global Notes:
Note (G1): The cooling efficiency Λ is a function of the temperature
(T), the ionization (xi) and the metallicity (Z). Λ is
related to the cooling by equation:
dQ/dt = -ne nH V Λ
where ne is the electron density, nH the proton density,
and V the volume.
Our assumed Z=1 solar abundances are (Table 1):
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Element Abundance (X/H)Sun
------------------------------------
C Carbon 2.45x10-4
N Nitrogen 6.03x10-5
O Oxygen 4.57x10-4
Ne Neon 1.95x10-4
Mg Magnesium 3.39x10-5
Si Silicon 3.24x10-5
S Sulfur 1.38x10-5
Fe Iron 2.82x10-5
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 19-Nov-2008