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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
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:
FileName Lrecl Records Explanations
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
Byte-by-byte Description of file: table2?.dat
Bytes Format Units Label Explanations
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 He^2+^ 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 C^2+^ fractional abundance (1) (G1) 85- 92 E8.2 --- C3+/C C^3+^ fractional abundance (1) (G1) 94-101 E8.2 --- C4+/C C^4+^ fractional abundance (1) (G1) 103-110 E8.2 --- C5+/C C^5+^ fractional abundance (1) (G1) 112-119 E8.2 --- C6+/C C^6+^ 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 N^2+^ fractional abundance (1) (G1) 148-155 E8.2 --- N3+/N N^3+^ fractional abundance (1) (G1) 157-164 E8.2 --- N4+/N N^4+^ fractional abundance (1) (G1) 166-173 E8.2 --- N5+/N N^5+^ fractional abundance (1) (G1) 175-182 E8.2 --- N6+/N N^6+^ fractional abundance (1) (G1) 184-191 E8.2 --- N7+/N N^7+^ 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 O^2+^ fractional abundance (1) (G1) 220-227 E8.2 --- O3+/O O^3+^ fractional abundance (1) (G1) 229-236 E8.2 --- O4+/O O^4+^ fractional abundance (1) (G1) 238-245 E8.2 --- O5+/O O^5+^ fractional abundance (1) (G1) 247-254 E8.2 --- O6+/O O^6+^ fractional abundance (1) (G1) 256-263 E8.2 --- O7+/O O^7+^ fractional abundance (1) (G1) 265-272 E8.2 --- O8+/O O^8+^ 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 Ne^2+^ fractional abundance (1) (G1) 301-308 E8.2 --- Ne3+/Ne Ne^3+^ fractional abundance (1) (G1) 310-317 E8.2 --- Ne4+/Ne Ne^4+^ fractional abundance (1) (G1) 319-326 E8.2 --- Ne5+/Ne Ne^5+^ fractional abundance (1) (G1) 328-335 E8.2 --- Ne6+/Ne Ne^6+^ fractional abundance (1) (G1) 337-344 E8.2 --- Ne7+/Ne Ne^7+^ fractional abundance (1) (G1) 346-353 E8.2 --- Ne8+/Ne Ne^8+^ fractional abundance (1) (G1) 355-362 E8.2 --- Ne9+/Ne Ne^9+^ fractional abundance (1) (G1) 364-371 E8.2 --- Ne10+/Ne Ne^10+^ 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 Mg^2+^ fractional abundance (1) (G1) 400-407 E8.2 --- Mg3+/Mg Mg^3+^ fractional abundance (1) (G1) 409-416 E8.2 --- Mg4+/Mg Mg^4+^ fractional abundance (1) (G1) 418-425 E8.2 --- Mg5+/Mg Mg^5+^ fractional abundance (1) (G1) 427-434 E8.2 --- Mg6+/Mg Mg^6+^ fractional abundance (1) (G1) 436-443 E8.2 --- Mg7+/Mg Mg^7+^ fractional abundance (1) (G1) 445-452 E8.2 --- Mg8+/Mg Mg^8+^ fractional abundance (1) (G1) 454-461 E8.2 --- Mg9+/Mg Mg^9+^ fractional abundance (1) (G1) 463-470 E8.2 --- Mg10+/Mg Mg^10+^ fractional abundance (1) (G1) 472-479 E8.2 --- Mg11+/Mg Mg^11+^ fractional abundance (1) (G1) 481-488 E8.2 --- Mg12+/Mg Mg^12+^ 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 Si^2+^ fractional abundance (1) (G1) 517-524 E8.2 --- Si3+/Si Si^3+^ fractional abundance (1) (G1) 526-533 E8.2 --- Si4+/Si Si^4+^ fractional abundance (1) (G1) 535-542 E8.2 --- Si5+/Si Si^5+^ fractional abundance (1) (G1) 544-551 E8.2 --- Si6+/Si Si^6+^ fractional abundance (1) (G1) 553-560 E8.2 --- Si7+/Si Si^7+^ fractional abundance (1) (G1) 562-569 E8.2 --- Si8+/Si Si^8+^ fractional abundance (1) (G1) 571-578 E8.2 --- Si9+/Si Si^9+^ fractional abundance (1) (G1) 580-587 E8.2 --- Si10+/Si Si^10+^ fractional abundance (1) (G1) 589-596 E8.2 --- Si11+/Si Si^11+^ fractional abundance (1) (G1) 598-605 E8.2 --- Si12+/Si Si^12+^ fractional abundance (1) (G1) 607-614 E8.2 --- Si13+/Si Si^13+^ fractional abundance (1) (G1) 616-623 E8.2 --- Si14+/Si Si^14+^ 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 S^2+^ fractional abundance (1) (G1) 652-659 E8.2 --- S3+/S S^3+^ fractional abundance (1) (G1) 661-668 E8.2 --- S4+/S S^4+^ fractional abundance (1) (G1) 670-677 E8.2 --- S5+/S S^5+^ fractional abundance (1) (G1) 679-686 E8.2 --- S6+/S S^6+^ fractional abundance (1) (G1) 688-695 E8.2 --- S7+/S S^7+^ fractional abundance (1) (G1) 697-704 E8.2 --- S8+/S S^8+^ fractional abundance (1) (G1) 706-713 E8.2 --- S9+/S S^9+^ fractional abundance (1) (G1) 715-722 E8.2 --- S10+/S S^10+^ fractional abundance (1) (G1) 724-731 E8.2 --- S11+/S S^11+^ fractional abundance (1) (G1) 733-740 E8.2 --- S12+/S S^12+^ fractional abundance (1) (G1) 742-749 E8.2 --- S13+/S S^13+^ fractional abundance (1) (G1) 751-758 E8.2 --- S14+/S S^14+^ fractional abundance (1) (G1) 760-767 E8.2 --- S15+/S S^15+^ fractional abundance (1) (G1) 769-776 E8.2 --- S16+/S S^16+^ 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 Fe^2+^ fractional abundance (1) (G1) 805-812 E8.2 --- Fe3+/Fe Fe^3+^ fractional abundance (1) (G1) 814-821 E8.2 --- Fe4+/Fe Fe^4+^ fractional abundance (1) (G1) 823-830 E8.2 --- Fe5+/Fe Fe^5+^ fractional abundance (1) (G1) 832-839 E8.2 --- Fe6+/Fe Fe^6+^ fractional abundance (1) (G1) 841-848 E8.2 --- Fe7+/Fe Fe^7+^ fractional abundance (1) (G1) 850-857 E8.2 --- Fe8+/Fe Fe^8+^ fractional abundance (1) (G1) 859-866 E8.2 --- Fe9+/Fe Fe^9+^ fractional abundance (1) (G1) 868-875 E8.2 --- Fe10+/Fe Fe^10+^ fractional abundance (1) (G1) 877-884 E8.2 --- Fe11+/Fe Fe^11+^ fractional abundance (1) (G1) 886-893 E8.2 --- Fe12+/Fe Fe^12+^ fractional abundance (1) (G1) 895-902 E8.2 --- Fe13+/Fe Fe^13+^ fractional abundance (1) (G1) 904-911 E8.2 --- Fe14+/Fe Fe^14+^ fractional abundance (1) (G1) 913-920 E8.2 --- Fe15+/Fe Fe^15+^ fractional abundance (1) (G1) 922-929 E8.2 --- Fe16+/Fe Fe^16+^ fractional abundance (1) (G1) 931-938 E8.2 --- Fe17+/Fe Fe^17+^ fractional abundance (1) (G1) 940-947 E8.2 --- Fe18+/Fe Fe^18+^ fractional abundance (1) (G1) 949-956 E8.2 --- Fe19+/Fe Fe^19+^ fractional abundance (1) (G1) 958-965 E8.2 --- Fe20+/Fe Fe^20+^ fractional abundance (1) (G1) 967-974 E8.2 --- Fe21+/Fe Fe^21+^ fractional abundance (1) (G1) 976-983 E8.2 --- Fe22+/Fe Fe^22+^ fractional abundance (1) (G1) 985-992 E8.2 --- Fe23+/Fe Fe^23+^ fractional abundance (1) (G1) 994-1001 E8.2 --- Fe24+/Fe Fe^24+^ fractional abundance (1) (G1) 1003-1010 E8.2 --- Fe25+/Fe Fe^25+^ fractional abundance (1) (G1) 1012-1019 E8.2 --- Fe26+/Fe Fe^26+^ fractional abundance (1) (G1)
Note (1): For T<104K the electron density, and associated ion fractions, depend on Z.
Byte-by-byte Description of file: table4?.dat
Bytes Format Units Label Explanations
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)
Note (1): In units of erg.cm3/s.
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): ------------------------------------ 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 ------------------------------------
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 19-Nov-2008
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