J/MNRAS/369/1131 Structures in the GA region (Radburn-Smith+, 2006)
Structures in the Great Attractor Region.
Radburn-Smith D.J., Lucey J.R., Woudt P.A., Kraan-Korteweg R.C., Watson F.G.
<Mon. Not. R. Astron. Soc. 369, 1131 (2006)>
=2006MNRAS.369.1131R 2006MNRAS.369.1131R
ADC_Keywords: Clusters, galaxy ; Galaxies, optical ; Redshifts
Keywords: galaxies: clusters: general - galaxies: distances and redshifts -
large-scale structure of Universe
Abstract:
To further our understanding of the Great Attractor (GA), we have
undertaken a redshift survey using the 2dF on the AAT. Clusters and
filaments in the GA region were targeted with 25 separate pointings
resulting in approximately 2600 new redshifts. Targets included poorly
studied X-ray clusters from the CIZA catalogue as well as the Cen-Crux
and PKS 1343-601 clusters, both of which lie close to the classic GA
centre. For nine clusters in the region, we report velocity
distributions as well as virial and projected mass estimates. The
virial mass of CIZA J1324.75736, now identified as a separate
structure from the Cen-Crux cluster, is found to be ∼3x1014M☉
in good agreement with the X-ray inferred mass. In the PKS 1343-601
field, five redshifts are measured of which four are new. An analysis
of redshifts from this survey, in combination with those from the
literature, reveals the dominant structure in the GA region to be a
large filament, which appears to extend from Abell S0639 (l=281°,
b=+11°) to (l∼5°, b~-50°), encompassing the Cen-Crux, CIZA
J1324.75736, Norma and Pavo II clusters. Behind the Norma Cluster at
cz∼15000km/s, the masses of four rich clusters are calculated. These
clusters (Triangulum-Australis, Ara, CIZA J1514.64558 and CIZA
J1410.44246) may contribute to a continued large- scale flow beyond
the GA. The results of these observations will be incorporated into a
subsequent analysis of the GA flow.
Description:
Heliocentric absorption and emission redshifts are presented for 3053
galaxies in the Zone of Avoidance. These include members of newly
identified clusters in the Great Attractor/Shapley supercluster
region. Key clusters targeted include: CIZA J1324.7-5736, Abell S0639,
Triangulum Australis, Ara, CIZA J1514.6-4558, CIZA J1410.4-4246 and
PKS 1343-601.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 66 3053 Redshifts for 3053 galaxies in the ZoA
--------------------------------------------------------------------------------
See also:
J/A+AS/110/269 : Galaxies in the "zone of avoidance". I. (Weinberger+, 1995)
J/A+AS/117/1 : Galaxies in the "zone of avoidance". II. (Seeberger+, 1996)
J/A+AS/117/369 : Galaxies in the "zone of avoidance". III. (Lercher+, 1996)
J/A+AS/126/247 : Galaxies in the "zone of avoidance". IV. (Saurer+, 1997)
J/A+AS/127/101 : Galaxies in the "zone of avoidance". V. (Seeberger+ 1998)
J/ApJ/449/527 : Galaxies in the zone of avoidance (Lu+ 1995)
J/AJ/113/905 : HI obs. of galaxies in the zone of avoidance (Pantoja+ 1997)
J/AJ/129/220 : HI Parkes Zone of Avoidance Survey (Donley+, 2005)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 23 A23 --- Galaxy Galaxy identification (1)
25- 33 F9.5 deg RAdeg Right Ascension J2000 (degrees)
35- 43 F9.5 deg DEdeg Declination J2000 (degrees)
45- 49 F5.2 mag Jmagext ? 2MASS J-band magnitude (2)
51- 56 I6 km/s czab ? Heliocentric absorption redshift
58- 63 I6 km/s czem ? Heliocentric emission redshift
65- 66 I2 --- Field Field number
--------------------------------------------------------------------------------
Note (1): Where available the 2MASS XSC name (Jarrett et al.,
2000AJ....119.2498J 2000AJ....119.2498J) is given first and then the equivalent NED
identification. As of March 2006, seven galaxies are contained in
neither the NED or 2MASS XSC catalogues: Two with the prefix `KKOWA'
were found by Kraan-Korteweg et al. (2005ASPC..329..159K 2005ASPC..329..159K), two with
the prefix `NNSW' were found by Nagayama et al. (2005ASPC..329..177N 2005ASPC..329..177N)
and a further three with the prefix `DJRS' are new identifications
from visual inspection of DSS images.
Note (2): Where available, the 2MASS J-band magnitude `jmext' is listed.
This is an extrapolation from a fit to the radial surface brightness
profile.
--------------------------------------------------------------------------------
Acknowledgements: David Radburn-Smith, d.j.radburn-smith(at)durham.ac.uk
(End) Patricia Vannier [CDS] 30-Jun-2006