Erratum: ``Groups of Galaxies in the Two Micron All Sky Redshift Survey'' (ApJ, 655, 790 [2007])

Details Erratum: ``Groups of Galaxies in the Two Micron All Sky Redshift Survey'' (ApJ, 655, 790 [2007]) Erratum: ``Groups of Galaxies in the Two Micron All Sky Redshift Survey'' (ApJ, 655, 790 [2007])

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008apj...685.1320c&link_type=abstract

The Astrophysical Journal, Volume 685, Issue 2, pp. 1320-1323.

Astronomy and Astrophysics

Astronomy

2

Errata, Addenda

Scientific paper

A computational error resulted in a scaling of the linking parameter, D, with a weaker dependence on redshift than that described in the text. Figure E1 shows linking length D(V) as a function of redshift, V, in both utilized and corrected forms. The mean intergalaxy separation (of visible galaxies) computed from the luminosity function for a K<11.25 survey is also shown, for scale.
Since the redshift distribution of visible galaxies peaks near 6000 km s-1, where the difference between the scalings is minimized, the overall properties of the groups are consistent (within reported 99% confidence levels) with the values in the original article. The revised values are given here in the corrected Table 2 ; the conclusions of the article remain unchanged. The change in group identification is most significant very nearby (V<~1500 km s-1), where the reduced linking length results in fewer groups merging with the Virgo group.
The values of D0=D (VF=1000 km s-1) should read 1.04 Mpc for the LDC catalog (δρ/ρ=12) and 0.56 Mpc for the HDC catalog (δρ/ρ=80). The linking parameters obtained when maximizing the number of groups using the corrected algorithm are consistent with those selected for the definition of the LDC catalog. We present the revised LDC and HDC group catalogs, at density contrasts δρ/ρ=12 (setting V0=399 km s-1) and δρ/ρ=80 (setting V0=350 km s-1), respectively. The full corrected catalogs (Tables 6, 7, 10, and 11) are available in electronic form with the online materials accompanying this erratum. We are grateful to Guilhem Lavaux for bringing the error to the attention of the authors.

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