Suppressed radio emission in supercluster galaxies: enhanced ram pressure in merging clusters?

J.-C. Mauduit; G. A. Mamon

doi:10.1051/0004-6361/20077721e

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Volume 499 / No 1 (May III 2009)

A&A, 499 1 (2009) 45-46

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Erratum

This article is an erratum for:
[https://doi.org/10.1051/0004-6361:20077721]

Issue		A&A Volume 499, Number 1, May III 2009


Page(s)		45 - 46
Section		Extragalactic astronomy
DOI		https://doi.org/10.1051/0004-6361/20077721e
Published online		09 February 2009

Erratum

Suppressed radio emission in supercluster galaxies: enhanced ram pressure in merging clusters?

J.-C. Mauduit¹ - G. A. Mamon^2,3

1 - Observatoire de la Côte d'Azur, BP 4229, 06304 Nice Cedex 4, France
2 - Institut d'Astrophysique de Paris (UMR 7095: CNRS & UPMC), 98 bis Bd. Arago, 75014 Paris, France
3 - Astrophysics & BIPAC, University of Oxford, Keble Rd, Oxford OX1 3RH, UK

A&A 475, 169-185 (2007), DOI: 10.1051/0004-6361/20077721

The paper ``Suppressed radio emission in supercluster galaxies: enhanced ram pressure in merging clusters'' was published in A&A 475, 169. There is a double typographical error in Appendix A. In Eqs. (A.2) and (A.9), which both express the squared aperture velocity dispersion of a respectively general and NFW (Navarro et al. 1996) spherical system, there is a factor 3 missing in the terms in front of the integrals, so that the squared aperture velocity dispersion should be 3 times smaller than given. These two equations should thus read

$\begin{displaymath}\sigma_{\rm ap}^2 (R) = {4\pi~G\over 3~M_{\rm p}(R)}~\left [\... ... {(r^2\!-\!R^2)^{3/2}\over r^2}~\rho(r) M(r)~{\rm d}r \right ] \end{displaymath}$

(A.2)

and

$\begin{displaymath}\widetilde \sigma_v^2 (Y~r_{\rm vir}/c) = {c\over 3~g}~ {\int... ...1}(1/Y) / \left \vert Y^2-1\right\vert^{1/2} + \ln(Y/2)} \cdot \end{displaymath}$

(A.9)

However, all other equations (in particular Eqs. (A.10) and (A.11)) are correct as is the accompanying discussion.

Note that the derivation of Eq. (A.9) involves not only Eq. (A.2) of Mauduit & Mamon (2007) and Eq. (42) of okas & Mamon (2001), but also Eq. (43) of okas & Mamon.

References

okas, E. L., & Mamon, G. A. 2001, MNRAS, 321, 155 [NASA ADS] [CrossRef] (In the text)
Mamon, G. A., & okas, E. L. 2005, MNRAS, 362, 95 [NASA ADS] [CrossRef]
Mamon, G. A., & okas, E. L. 2006, MNRAS, 370, 1581 [NASA ADS] [CrossRef]
Mauduit, J.-C., & Mamon, G. A. 2007, A&A, 475, 169 [NASA ADS] [CrossRef] [EDP Sciences] (In the text)
Navarro, J. F., Frenk, C. S., & White, S. D. M. 1996, ApJ, 462, 563 [NASA ADS] [CrossRef] (In the text)

Footnotes

... given: This factor of 3 is also missing in Eq. (B.7) of Mamon & okas (2005), as reported by Mamon & okas (2006).

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