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标题：Surface chemistry in photodissociation regions (Corrigendum)
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作者：G. B. Esplugues ; G. B. Esplugues ; S. Cazaux 等
期刊名称：Astronomy & Astrophysics
印刷版ISSN：0004-6361
电子版ISSN：1432-0746
出版年度：2017
卷号：598
页码：1-6
DOI：10.1051/0004-6361/201528001e
语种：English
出版社：EDP Sciences
摘要：In Table A.5 (page 17) of our original publication (Esplugues et al. 2016), the rate coefficient considered for the CO ice photodesorption was 2.2 × 10 −15 s −1 , however we should have considered a coefficient of 3.67 × 10 −10 s −1 according to recent results (Fayolle et al. 2011; Muñoz-Caro et al. 2016). We also update here the values for the solid species H 2 O and H 2 CO con- sidering a coefficient of 3.67 × 10 −11 s −1 for both of them (see Table 1) instead of 2.16 × 10 −11 s −1 . In particular, the photo- process reaction rate, R photo (cm −3 s −1 ), is calculated for these cases as R photo = n i f ss k photo , (1) where n i is the number density of the photodissociated species, f ss is the self-shielding factor, and k photo (s −1 ) is the photo- process rate coefficient as follows: k photo = χF Draine 4n surf N lay Y i ’ 2.16 × 10 −8 χY i = 3.67 × 10 −8 G 0 Y i = α i G 0 , following Chaparro-Molano & Kamp (2012). In expression (2), χ is the UV field strength (Draine 1978) 1 , and the pho- ton flux produced by this field per unit area is F Draine = 1.921 × 10 8 cm −2 s −1 (Woitke et al. 2009). Furthermore, n surf = 1.11 × 10 15 cm −2 is the surface density of available absorption sites per unit grain area assuming 3 Å separation between sites, N lay = 2 is the assumed number of ice layers that photons can penetrate for photodesorption (Andersson et al. 2006; Arasa et al. 2010; Muñoz-Caro et al. 2016), and Y i is the photodesorp- tion yield per photon (see Table 2).
关键词：astrochemistry;ISM: abundances;photon-dominated region (PDR);errata, addenda