ON THE RELATIVE ABUNDANCE OF LiH AND LiH+ MOLECULES IN THE EARLY UNIVERSE: NEW RESULTS FROM QUANTUM REACTIONS

被引：39
作者：
Bovino, Stefano [1 ,2 ]
Tacconi, Mario [1 ,2 ]
Gianturco, Franco A. [1 ,2 ]
Galli, Daniele [3 ]
Palla, Francesco [3 ]
机构：
[1] Univ Rome Sapienza, Dept Chem, I-00185 Rome, Italy
[2] Univ Rome Sapienza, CNISM, I-00185 Rome, Italy
[3] INAF Osservatorio Astrofis Arcetri, I-50125 Florence, Italy
来源：
ASTROPHYSICAL JOURNAL | 2011年 / 731卷 / 02期
关键词：
astrochemistry; early universe; evolution; molecular processes; RADIATIVE ASSOCIATION; LITHIUM CHEMISTRY; CHARGE-TRANSFER; RECOMBINATION; COLLISIONS; SURFACES; ELEMENTS; RATES; H-2; H+;
D O I：
10.1088/0004-637X/731/2/107
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The relative efficiencies of the chemical pathways that can lead to the destruction of LiH and LiH+ molecules, conjectured to be present in the primordial gas and to control molecular cooling processes in the gravitational collapse of the post-recombination era, are revisited by using accurate quantum calculations for the several reactions involved. The new rates are employed to survey the behavior of the relative abundance of these molecules at redshifts of interest for early universe conditions. We find significant differences with respect to previous calculations, the present ones yielding LiH abundances higher than LiH+ at all redshifts.
引用
收藏
页数：6
相关论文
共 41 条
  • [1] Radiative association in Li+H revisited:: the role of quasi-bound states (vol 341, pg 361. 2003)
    Bennett, O. J.
    Dickinson, A. S.
    Leininger, T.
    Gadea, F. X.
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2008, 384 (04) : 1743 - 1744
  • [2] Radiative association in Li+H revisited:: the role of quasi-bound states
    Bennett, OJ
    Dickinson, AS
    Leininger, T
    Gadéa, FX
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2003, 341 (01) : 361 - 368
  • [3] Lithium hydride in the early Universe and in protogalactic clouds
    Bougleux, E
    Galli, D
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1997, 288 (03) : 638 - 648
  • [4] THE IONIC PATHWAYS OF LITHIUM CHEMISTRY IN THE EARLY UNIVERSE: QUANTUM CALCULATIONS FOR LiH+ REACTING WITH H
    Bovino, S.
    Stoecklin, T.
    Gianturco, F. A.
    [J]. ASTROPHYSICAL JOURNAL, 2010, 708 (02) : 1560 - 1565
  • [5] FAST LiH DESTRUCTION IN REACTION WITH H: QUANTUM CALCULATIONS AND ASTROPHYSICAL CONSEQUENCES
    Bovino, S.
    Wernli, M.
    Gianturco, F. A.
    [J]. ASTROPHYSICAL JOURNAL, 2009, 699 (01) : 383 - 387
  • [6] Bovino S., 2010, APJ, V724, P106
  • [7] Real wave packet and quasiclassical trajectory studies of the H++LiHreaction
    Bulut, N.
    Castillo, J. F.
    Aoiz, F. J.
    Banares, L.
    [J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2008, 10 (06) : 821 - 827
  • [8] Quantum Mechanical Wave Packet and Quasiclassical Trajectory Calculations for the Li + H2+ Reaction
    Bulut, N.
    Castillo, J. F.
    Banares, L.
    Aoiz, F. J.
    [J]. JOURNAL OF PHYSICAL CHEMISTRY A, 2009, 113 (52) : 14657 - 14663
  • [9] VIBRATIONAL LEVEL POPULATION OF H2 AND H2+ IN THE EARLY UNIVERSE
    Coppola, Carla M.
    Longo, Savino
    Capitelli, Mario
    Palla, Francesco
    Galli, Daniele
    [J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2011, 193 (01)
  • [10] Rate coefficients for the Li+/H- and Li-/H+ mutual neutralization reactions
    Croft, H
    Dickinson, AS
    Gadéa, FX
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1999, 304 (02) : 327 - 329
12345