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Erratum
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Issue
A&A
Volume 511, February 2010
Article Number C1
Number of page(s) 1
Section Interstellar and circumstellar matter
DOI https://doi.org/10.1051/0004-6361/200401464e
Published online 02 March 2010
A&A 511, C1 (2010)

Complete depletion in prestellar cores. Multiply-deuterated species in prestellar cores (Corrigendum)

D. R. Flower1 - G. Pineau des Forêts2,3 - C. M. Walmsley4

1 - Physics Department, The University, Durham DH1 3LE, UK
2 - IAS (UMR 8617), Université de Paris-Sud, 91405 Orsay, France
3 - LERMA (UMR 8112), Observatoire de Paris, 61 avenue de l'Observatoire, 75014 Paris, France
4 - INAF, Osservatorio Astrofisico di Arcetri, Largo Enrico Fermi 5, 50125 Firenze, Italy

A&A, 418, 1035-1043 (2004), DOI: 10.1051/0004-6361:20035718 

A&A, 427, 887-893 (2004), DOI: 10.1051/0004-6361:20041464


Key words: astrochemistry - ISM: clouds - stars: formation - errata, addenda

In our papers, Walmsley et al. (2004) and Flower et al. (2004), the captions to the tables in the Appendices A were inexact with respect to the reactions involving grains. We stated (i) that the parameters $\alpha $, $\beta $, and $\gamma $ defined the rate coefficients k (cm3 s-1) at temperature T (K) through the relation k = J $(a_g, T)\gamma (T/300)^{\alpha } {\rm exp}(-\beta /T)$, where J allowed for Coulomb focusing in reactions of positive ions and negatively charged grains (Draine & Sutin 1987, Eq. (3.4)); and (ii) that a grain radius ag = 0.1 $\mu $m was adopted in the table. In fact, the tabulated values of $\gamma $ were determined for a size distribution following the Mathis et al. (1977) power law, with limits $0.01 \le a_g \le 0.3$ $\mu $m. The tabulated value of $\gamma $ was multiplied by (ag/0.02)2 within our program, to obtain the grain cross section corresponding to the adopted value of ag = 0.1 $\mu $m. (The mean radius for the size distribution of Mathis et al. (1977) is 0.02 $\mu $m.) Thus, the tabulated values of $\gamma $ for reactions between ions and grains should be increased by a factor of 25 to correspond to the numbers actually used in our models, for a grain size ag = 0.1 $\mu $m.

References

  1. Draine, B. T., & Sutin, B. 1987, ApJ, 320, 803 [NASA ADS] [CrossRef] [Google Scholar]
  2. Flower, D. R., Pineau des Forêts, G., & Walmsley, C. M. 2004, A&A, 427, 887 [NASA ADS] [CrossRef] [EDP Sciences] [Google Scholar]
  3. Mathis, J. S., Rumpl, W., & Nordsieck, K. H. 1977, ApJ, 217, 425 [NASA ADS] [CrossRef] [Google Scholar]
  4. Walmsley, C. M., Flower, D. R., & Pineau des Forêts, G. 2004, A&A, 418, 1035 [NASA ADS] [CrossRef] [EDP Sciences] [Google Scholar]

Copyright ESO 2010

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