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: -------------------------------------------------------------------------------- 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 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) -------------------------------------------------------------------------------- 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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