J/MNRAS/410/1837 Architecture of A1386 and the Sloan Great Wall (Pimbblet+ 2011)
Architecture of A1386 and its relationship to the Sloan Great Wall
Pimbblet K.A., Andernach H., Fishlock C.K., Roseboom I.G., Owers M.S.
<Mon. Not. R. Astron. Soc., 410, 1837-1848 (2011)>
=2011MNRAS.410.1837P 2011MNRAS.410.1837P
ADC_Keywords: Clusters, galaxy ; Redshifts
Keywords: galaxies: clusters: general -
galaxies: clusters: individual: Abell 1386 -
galaxies: distances and redshifts
cosmology: observations
Abstract:
We present new radial velocities from AAOmega on the Anglo-Australian
Telescope for 307 galaxies (bJ < 19.5) in the region of the rich
cluster Abell 1386. Consistent with other studies of galaxy clusters
that constitute subunits of superstructures, we find that the
velocity distribution of A1386 is very broad (21000-42000 km/s,
or z = 0.08-0.14) and complex. The mean redshift of the cluster that
Abell designated as number 1386 is found to be ∼0.104. However,
we find that it consists of various superpositions of line-of-sight
components. We investigate the reality of each component by testing
for substructure and searching for giant elliptical galaxies in
each and show that A1386 is made up of at least four significant
clusters or groups along the line of sight whose global parameters
we detail. Peculiar velocities of brightest galaxies for each of the
groups are computed and found to be different from previous works,
largely due to the complexity of the sky area and the depth of
analysis performed in the present work. We also analyse A1386 in
the context of its parent superclusters: Leo A and especially the
Sloan Great Wall. Although the new clusters may be moving towards
mass concentrations in the Sloan Great Wall or beyond, many are
most likely not yet physically bound to it.
Description:
We present new radial velocities for 307 galaxies (bJ<19.5) in the
region of the rich cluster Abell 1386. 72 of these galaxies did not
have any redshift published before. For each galaxy equatorial
coordinates, total R magnitudes and all previously published redshifts
are listed.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 123 10 Known clusters close to overdensities in Fig. 5
tablea1.dat 106 307 Positions, magnitudes and radial velocities
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Name of overdensity (Greek letter)
11- 12 I2 h RAh Right ascension (J2000) (3)
13- 14 I2 min RAm Right ascension (J2000) (3)
15- 16 I2 s RAs Right ascension (J2000) (3)
17 A1 --- DE- Declination sign (3)
18- 19 I2 deg DEd Declination (J2000) (3)
20- 21 I2 arcmin DEm Declination (J2000) (3)
22- 23 I2 arcsec DEs Declination (J2000) (3)
25- 29 I5 km/s Mean heliocentric radial velocity (1)
31- 56 A26 --- NEDname Name of matching object in NED (2)
58- 59 I2 h RA1h ? Right ascension of NED object (J2000)
60- 61 I2 min RA1m ? Right ascension of NED object (J2000)
62- 63 I2 s RA1s ? Right ascension of NED object (J2000)
64 A1 --- DE1- ? Declination sign of NED object
65- 66 I2 deg DE1d ? Declination of NED object (J2000)
67- 68 I2 arcmin DE1m ? Declination of NED object (J2000)
69- 70 I2 arcsec DE1s ? Declination of NED object (J2000)
72- 76 I5 km/s cz1 ? Heliocentric radial velocity from NED
77 A1 --- f_cz1 [e] NED velocity is a photometric estimate
79-123 A45 --- Com Comments on individual objects
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Note (1): The mean velocity quoted for each group is computed from galaxies
within the marked circles (radius of 0.15°) in Fig. 5.
Note (2): If blank, no plausible match was found
Note (3): Position defined as the center of the circle that comprises the
galaxies we consider members.
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Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- --- [PRA]
4- 6 I03 --- PRA [1/307] PRA galaxy number
8- 9 I2 h RAh Right ascension (J2000)
10- 11 I2 min RAm Right ascension (J2000)
12- 16 F5.2 s RAs Right ascension (J2000)
17 A1 --- DE- Declination sign
18- 19 I2 deg DEd Declination (J2000)
20- 21 I2 arcmin DEm Declination (J2000)
22- 25 F4.1 arcsec DEs Declination (J2000)
27- 31 F5.2 mag Rmag Red magnitude from APM (1)
33- 37 I5 km/s cz Heliocentric radial velocity measured by us
39 -41 I3 km/s e_cz Error in heliocentric radial velocity
43 -47 I5 km/s czl1 ? Literature radial velocity no. 1
49 -51 I3 km/s e_czl1 ? Literature velocity error no. 1
53 A1 --- r_czl1 [a-j] Reference for czl1 (2)
56 -60 I5 km/s czl2 ? Literature radial velocity no. 2
62 -64 I3 km/s e_czl2 ? Literature velocity error no. 2
66 A1 --- r_czl2 [a-j] Reference for czl2 (2)
67 A1 --- n_czl2 [12] Notes (3)
70 -74 I5 km/s czl3 ? Literature radial velocity no. 3
76 -78 I3 km/s e_czl3 ? Literature velocity error no. 3
80 A1 --- r_czl3 [a-j] Reference for czl3 (2)
81 A1 --- n_czl3 [12] Notes (3)
83 -87 I5 km/s czl4 ? Literature radial velocity no. 4
89 -91 I3 km/s e_czl4 ? Literature velocity error no. 4
93 A1 --- r_czl4 [a-j] Reference for czl4 (2)
96-100 I5 km/s czl5 ? Literature radial velocity no. 5
102-104 I3 km/s e_czl5 ? Literature velocity error no. 5
106 A1 --- r_czl5 [a-j] Reference for czl5 (2)
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Note (1): From Maddox et al. 1990, MNRAS, 243, 692; see also
www.ast.cam.ac.uk/∼mike/apmcat/
Note (2): Reference codes are as follows:
a = 2dFGRS (Colless et al. 2003) astro-ph/06581 (VII/250)
b = 6dFGS (Jones et al. 2009); 2009MNRAS.399..683J 2009MNRAS.399..683J (VII/259)
c = HIPASS (Doyle et al. 2005); 2005MNRAS.361...34D 2005MNRAS.361...34D
d = Quintana & Ram'irez (1995); 1995ApJS...96..343Q 1995ApJS...96..343Q (J/ApJS/96/343)
e = LCRS (Shectman et al. 1996); 1996ApJ...470..172S 1996ApJ...470..172S (VII/203)
f = UZC (Falco et al. 1999); 1999PASP..111..438F 1999PASP..111..438F (J/PASP/111/438)
g = SDSS-DR7 (Abazajian et al. 2009); 2009ApJS..182..543A 2009ApJS..182..543A (II/294)
h = Slinglend et al. (1998); 1998ApJS..115....1S 1998ApJS..115....1S (J/ApJS/115/1)
i = Grogin et al. (1998); 1998ApJS..119..277G 1998ApJS..119..277G (J/ApJS/119/277)
j = Da Costa L.N., et al. 1998. 1998AJ....116....1D 1998AJ....116....1D (J/AJ/116/1)
Note (3): Notes as follows:
1 = Possibly a nucleus ∼6" SW of main galaxy?
2 = A poor quality 6dFGS spectrum (D.H. Jones, priv. comm.)
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Acknowledgements:
Heinz Andernach <heinz(at)astro.ugto.mx>
(End) Heinz Andernach [Univ. de Guanajuato, Mexico] 10-Feb-2011