The radiative association of P and O atoms

被引：17

作者：

Andreazza, C. M. ^{[1
]}

de Almeida, A. A. ^{[2
]}

Borin, A. C. ^{[3
]}

机构：

[1] Univ Estadual Paulista, IGCE, DEMAC, Av 24A 1515, BR-13506700 Rio Claro, SP, Brazil

[2] Univ Sao Paulo, IAG, Rua Matao 1226, BR-05508090 Sao Paulo, SP, Brazil

[3] Univ Sao Paulo, IQ, Av Prof Lineu Prestes 748, BR-05508090 Sao Paulo, SP, Brazil

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2016年 / 457卷 / 03期

关键词：

atomic data; atomic processes; molecular data; circumstellar matter; ISM: molecules; VY-CANIS MAJORIS; ASYMPTOTIC GIANT BRANCH; CORRELATED MOLECULAR CALCULATIONS; POTENTIAL-ENERGY CURVES; GAUSSIAN-BASIS SETS; CONFIGURATION-INTERACTION; PHOSPHORUS CHEMISTRY; ELECTRONIC STATES; EVOLUTION; SPECTROSCOPY;

D O I：

10.1093/mnras/stw116

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The formation of PO from the radiative association of phosphorus and oxygen atoms has been estimated by accurate quantum chemistry calculations. The radiative association of P and O atoms along the B-2 Sigma(+) potential energy curve is the most efficient way of producing PO in the X-2 Pi ground state. For temperatures ranging between 300 and 14 000 K, the rate coefficients are found to vary from 1.61 x 10(-24) to 1.99 x 10(-18) cm(3)s(-1), respectively. These values indicate that only a very small amount of PO molecules can be formed by radiative association in dense and hot gas close to the photosphere of evolved oxygen-rich stars and other hostile environments.

引用

页码：3096 / 3100

页数：5

共 50 条

[41] THE ARIZONA RADIO OBSERVATORY 1 mm SPECTRAL SURVEY OF IRC+10216 AND VY CANIS MAJORIS (215-285 GHz) [J].

Tenenbaum, E. D. ;

Dodd, J. L. ;

Milam, S. N. ;

Woolf, N. J. ;

Ziurys, L. M. .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2010, 190 (02) :348-417

[42]

TSUJI T, 1973, ASTRON ASTROPHYS, V23, P411

[43] EVOLUTION OF LOW-MASS AND INTERMEDIATE-MASS STARS TO THE END OF THE ASYMPTOTIC GIANT BRANCH WITH MASS-LOSS [J].

VASSILIADIS, E ;

WOOD, PR .

ASTROPHYSICAL JOURNAL, 1993, 413 (02) :641-657

[44] Molpro: a general-purpose quantum chemistry program package [J].

Werner, Hans-Joachim ;

Knowles, Peter J. ;

Knizia, Gerald ;

Manby, Frederick R. ;

Schuetz, Martin .

WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE, 2012, 2 (02) :242-253

[45] AN EFFICIENT INTERNALLY CONTRACTED MULTICONFIGURATION REFERENCE CONFIGURATION-INTERACTION METHOD [J].

WERNER, HJ ;

KNOWLES, PJ .

JOURNAL OF CHEMICAL PHYSICS, 1988, 89 (09) :5803-5814

[46]

Willacy K, 1997, ASTRON ASTROPHYS, V324, P237

[47] Fundamental properties and atmospheric structure of the red supergiant VY Canis Majoris based on VLTI/AMBER spectro-interferometry [J].

Wittkowski, M. ;

Hauschildt, P. H. ;

Arroyo-Torres, B. ;

Marcaide, J. M. .

ASTRONOMY & ASTROPHYSICS, 2012, 540

[48] GAUSSIAN-BASIS SETS FOR USE IN CORRELATED MOLECULAR CALCULATIONS .3. THE ATOMS ALUMINUM THROUGH ARGON [J].

WOON, DE ;

DUNNING, TH .

JOURNAL OF CHEMICAL PHYSICS, 1993, 98 (02) :1358-1371

[49] Evolution of interstellar dust and stardust in the solar neighbourhood [J].

Zhukovska, S. ;

Gail, H. -P. ;

Trieloff, M. .

ASTRONOMY & ASTROPHYSICS, 2008, 479 (02) :453-U74

[50] RADIATIVE QUENCHING OF HE(2 S-1) INDUCED BY COLLISIONS WITH GROUND-STATE HELIUM-ATOMS [J].

ZYGELMAN, B ;

DALGARNO, A .

PHYSICAL REVIEW A, 1988, 38 (04) :1877-1884

← 1 2 3 4 5 →