Crook, Aidan C.

Huchra, John P.

Jarrett, Tom

Macri, Lucas M.

Martimbeau, Nathalie

Masters, Karen L.

English

Name not available

ERRATUM: ‘‘GROUPS OF GALAXIES IN THE TWO MICRON
ALL SKY REDSHIFT SURVEY’’ (ApJ, 655, 790 [2007])
Aidan C. Crook, John P. Huchra, Nathalie Martimbeau,
Karen L. Masters, Tom Jarrett and Lucas M. Macri
Fig. E1.—Linking parameter as a function of redshift for the density contrasts corresponding to the LDC and HDC catalogs. The original and corrected values are plotted,
along with the mean intergalaxy separation. We assume h ¼ 0:73 where a value is required.
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 s1, 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 P1500 km s1), where the reduced linking length results in fewer groups merging with the Virgo group.
The values of D0¼ D (VF ¼ 1000 km s1) should read 1.04Mpc for the LDC catalog (/ ¼ 12) and 0.56Mpc for the HDC catalog
(/ ¼ 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 / ¼
12 (setting V0 ¼ 399 km s1) and / ¼ 80 (setting V0 ¼ 350 km s1), respectively. The full corrected catalogs (Tables 6, 7, 10, and 11)
are available in electronic formwith the onlinematerials accompanying this erratum.We are grateful to GuilhemLavaux for bringing the
error to the attention of the authors.On-line material: machine-readable tables
The Astrophysical Journal, 685:1320–1323, 2008 October 1
# 2008. The American Astronomical Society. All rights reserved. Printed in U.S.A.
1320
TABLE 6
LDC Catalog of Groups in the 2MASS Redshift Survey
Number
(1)
R.A.
(2)
Decl.
(3)
Members
(4)
Distance
(Mpc)
(5)
VG
( km s1)
(6)
P
( km s1)
(7)
RP
(Mpc)
(8)
log MV
M
 
(9)
log MP
M
 
(10)
log
MP=L
M=L
 
(11)
a
(arcmin)
(12)

(13)

(deg)
(14)
1............... 00 00 55.2 +28 12 37 3 (0) 121.75 9001 190.5 2.95 14.069 14.233 2.143 48 . . . . . .
2............... 00 05 31.5 +27 29 37 3 (0) 102.61 7590 86.8 1.95 13.207 13.206 1.498 29 . . . . . .
3............... 00 05 41.8 +05 09 11 3 (0) 71.94 5340 41.0 0.64 12.072 11.974 0.594 15 . . . . . .
Notes.—This catalog has been produced using parameters (D0;V0) = (1.04 Mpc, 399 km s
1), corresponding to the density contrast / ¼ 12. We assume h ¼
0:73 where a value is required. Col. (4): Number of groupmembers (including those generated from the population of the plane). The number derived from the Galactic-
plane population is contained in parentheses. Col. (5): Mean (corrected) group distance. Col. (6): Mean heliocentric group velocity. Col. (7): Line-of-sight velocity
dispersion. Col. (8): Projected virial radius. Col. (9): Log of the virial mass in solar units. Col. (10): Log of the projected mass in solar units. Col. (11): Log of the
( projected) mass-to-light ratio in solar units. Col. (12): Semimajor axis of the ellipse fit to the group at the 75th percentile level. Col. (13): Axis ratio of ellipse fit to the
group members. Col. (14): Position angle of semimajor axis of ellipse fit to the group members; measured from north toward east. Table 6 is published in its entirety in
the electronic edition of the Astrophysical Journal. A portion is shown here for guidance regarding its form and content.
TABLE 2
Median Properties of Groups with Five or More Genuine Members
Property LDC Catalog HDC Catalog
P ( km s
1) ....................................... 196 (184, 205) 187 (175, 202)
RPV (Mpc).......................................... 1.67 (1.56, 1.79) 0.89 (0.81, 0.96)
log (MV /M) ...................................... 13.82 (13.74, 13.90) 13.49 (13.42, 13.58)
log (MP /M)....................................... 14.05 (13.98, 14.11) 13.63 (13.57, 13.71)
log ½(MV /LK )/(M /L) ...................... 1.70 (1.64, 1.75) 1.52 (1.45, 1.58)
log ½(MP /LK )/(M /L) ...................... 1.90 (1.83, 1.95) 1.64 (1.57, 1.70)
M ;V ................................................... 0.14 (0.12, 0.16) 0.09 (0.08, 0.11)
M ; P ................................................... 0.22 (0.19 0.25) 0.13 (0.11, 0.14)
TABLE 7
HDC Catalog of Groups in the 2MASS Redshift Survey
Number
(1)
R.A.
(2)
Decl.
(3)
Members
(4)
Distance
(Mpc)
(5)
VG
( km s1)
(6)
P
( km s1)
(7)
RP
(Mpc)
(8)
log
MV
M
 
(9)
log
MP
M
 
(10)
log
MP=L
M=L
 
(11)
a
(arcmin)
(12)

(13)

(deg)
(14)
Corresponding
Group Number
(15)
1........................... 00 05 31.5 +27 29 37 3 (0) 102.61 7590 86.8 1.95 13.207 13.206 1.498 29 2
2........................... 00 05 41.8 +05 09 11 3 (0) 71.94 5340 41.0 0.64 12.072 11.974 0.594 15 3
3........................... 00 06 10.8 +47 00 59 4 (0) 70.80 5162 158.1 0.56 13.183 13.544 1.970 33 6
Note—This catalog has been produced using parameters (D0;V0) = (0.56 Mpc, 350 km s
1), corresponding to the density contrast / ¼ 80. We assume h ¼ 0:73 where a value is required. Col. (4): Number of group
members (including those generated from the population of the plane). The number derived from the Galactic-plane population is contained in parentheses. Col. (5): Mean (corrected) group distance. Col. (6): Mean
heliocentric group velocity. Col. (7): Line-of-sight velocity dispersion. Col. (8): Projected virial radius. Col. (9): Log of the virial mass in solar units. Col. (10): Log of the projected mass in solar units. Col. (11): Log of the
( projected) mass-to-light ratio in solar units. Col. (12): Semimajor axis of the ellipse fit to the group at the 75th percentile level. Col. (13): Axis ratio of ellipse fit to the group members. Col. (14): Position angle of semimajor
axis of ellipse fit to the group members; measured from north toward east. Col. (15): Group number from LDC catalog that encompasses all members of this group. Table 7 is published in its entirety in the electronic edition of
the Astrophysical Journal. A portion is shown here for guidance regarding its form and content.
1
3
2
2
TABLE 10
Groups in the LDC Catalog and Their Members
Name
(1)
R.A.
(2)
Decl.
(3)
Vh
(km s1)
(4)
mK
(5)
Distance
(Mpc)
(6)
Corresponding
Group Number
(7)
Group 1
000433.73+2818059 .................... 00 04 33.6 +28 18 06 8785 10.62 118.79 None
235828.41+2802025 .................... 23 58 28.3 +28 02 03 9145 10.94 123.72 None
235943.72+2817251 .................... 23 59 43.6 +28 17 25 9073 10.71 122.74 None
Group 2
000329.22+2721063 .................... 00 03 29.1 +27 21 06 7690 11.02 103.97 1
000548.43+2726579 .................... 00 05 48.3 +27 26 58 7531 10.95 101.81 1
000717.10+2740421 .................... 00 07 17.1 +27 40 42 7550 11.13 102.05 1
Note.—The LDC group catalog was created using (D0;V0) = (1.04 Mpc, 399 km s
1), corresponding to a density contrast / ¼ 12.
Col. (4): Heliocentric velocity. Col. (5): Corrected distance, assuming h ¼ 0:73. Col. (6): Apparent K magnitude. Col. (7): Corresponding
group number assigned to this galaxy in the HDC catalog. Table 10 is published in its entirety in the electronic edition of the Astrophysical
Journal. A portion is shown here for guidance regarding its form and content.
TABLE 11
Groups in the HDC Catalog and Their Members
Name
(1)
R.A.
(2)
Decl.
(3)
Vh
(km s1)
(4)
mK
(5)
Distance
(Mpc)
(6)
Corresponding
Group Number
(7)
Group 1
000329.22+2721063 .................... 00 03 29.1 +27 21 06 7690 11.02 103.97 2
000548.43+2726579 .................... 00 05 48.3 +27 26 58 7531 10.95 101.81 2
000717.10+2740421 .................... 00 07 17.1 +27 40 42 7550 11.13 102.05 2
Group 2
000457.78+0507245 .................... 00 04 57.8 +05 07 24 5357 11.19 72.17 3
000527.66+0513204 .................... 00 05 27.6 +05 13 20 5294 10.08 71.31 3
000640.35+0506483 .................... 00 06 40.3 +05 06 48 5371 11.22 72.34 3
Note.—TheHDCgroup catalogwas created using (D0;V0) = (0.56Mpc, 350 km s
1), corresponding to a density contrast / ¼ 80. Col. (4):
Heliocentric velocity. Col. (5): Corrected distance, assuming h ¼ 0:73. Col. (6): ApparentKmagnitude. Col. (7): Corresponding group number
assigned to this galaxy in the LDC catalog. Table 11 is published in its entirety in the electronic edition of the Astrophysical Journal. A
portion is shown here for guidance regarding its form and content.
1323


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

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

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