1995A&A...297..617K

Query : 1995A&A...297..617K

1995A&A...297..617K - Astronomy and Astrophysics, volume 297617-633 (1995/5-3)

Extragalactic Large-scale structures behind the southern Milky Way.I. Redshifts obtained at the SAAO in the Hydra/Antlia extension.

KRAAN-KORTEWEG R.C., FAIRALL A.P. and BALKOWSKI C.

Abstract (from CDS):

Spectroscopic observations have been carried out for galaxies in the Milky Way with the 1.9m telescope of the South African Astronomical Observatory (SAAO). The galaxies were selected from a deep optical galaxy search covering 266deg≲l≲296deg, |b|≲10deg (Kraan-Korteweg 1994, in prep.). This is in the extension of the Hydra and Antlia clusters and in the approximate direction of the dipole anisotropy in the Cosmic Microwave Background radiation. The galaxies in the SAAO observing program - one of the three complementary approaches in mapping the 3D galaxy distribution in the ZOA - were selected for high central surface brightness and for even distribution over the whole search area. The majority of the galaxies have (absorbed) magnitudes in the range 14.5mag<BJ<17.5mag. Good S/N redshifts weredetermined for 115 galaxies. One spectrum confirmed a planetary nebula, whereas another object with v=57km/s most likely is galactic as well. The spectra of theother 25 galaxies either have low S/N or were dominated by superimposed foreground stars. A preliminary description of the distribution in velocity space is given. We do find evidence for a continuation of the Hydra/Antlia supercluster across the ZOA to b≃-10deg, making it one of the larger structures(supercluster?) in the nearby Universe. However, the prominent overdensity unveiled in the galaxy search in Vela (l≃280deg, b≃+6deg) does not, contrary to what may be expected from the 2D distribution, blend with the Hydra and Antlia supercluster (v≃3000km/s). The latter seems concentrated at v≃6000km/s. Whether itis related to the Great Attractor cannot yet be assessed. Another weaker concentration is found at v≃9700km/s. Further out, only tentative conclusions can be made. However, a distinct overabundance of redshifts around v≃16000km/s is found, corresponding to that of the adjacent dense Shapley (Alpha) region in the northern galactic hemisphere and to that of the Horologium superclusters in the southern galactic hemisphere. This might indicate that these two overdensities are part of a single massive structure, bisected by the Milky Way.

Abstract Copyright: ∼

Journal keyword(s): galaxies: redshifts - galaxies: clusters - large-scale structure of the Universe

VizieR on-line data: <Available at CDS (J/A+A/297/617): table1 table2 table3>

Nomenclature: RKK NNNN N=3279

Simbad objects: 122

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Number of rows : 122
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 ESO 165-1 AG? 08 34 47.8323010080 -57 38 45.948759720   14.8       ~ 17 0
2 2MASX J08344978-5637326 G 08 34 49.790 -56 37 32.66   16.8       ~ 3 0
3 LEDA 100035 AG? 08 35 04.750 -55 10 47.56   15.2   14.9 14.7 ~ 15 0
4 2MASX J08353984-5443073 G 08 35 39.8613817152 -54 43 07.284865908   16.2       ~ 11 0
5 2MASX J08372636-5535201 G 08 37 26.3577770352 -55 35 19.771187208   16.6       ~ 8 0
6 2MASX J08372908-5647250 G 08 37 29.1247235232 -56 47 25.440346788   17.0       ~ 4 0
7 2MASX J08375719-5758256 G 08 37 57.1466231160 -57 58 25.635028836   16.9       ~ 10 0
8 2MASX J08382302-5510415 G 08 38 23.0323811712 -55 10 41.173699332   16.4       ~ 9 0
9 2MASX J08432647-5341454 G 08 43 26.4271062600 -53 41 45.530281716   16.0       ~ 10 0
10 LEDA 100042 AG? 08 43 27.6752863128 -56 12 28.542486636   15.0       ~ 13 0
11 2MASX J08444203-5704363 G 08 44 42.037 -57 04 36.36   16.2       ~ 9 0
12 2MASX J08452367-5705403 G 08 45 23.6261460096 -57 05 40.525340748   16.1       ~ 8 0
13 2MASX J08461470-5508049 G 08 46 14.703 -55 08 04.96   16.1       ~ 10 0
14 2MASX J08462658-5906239 G 08 46 26.5741553904 -59 06 23.610862584   16.5       ~ 3 0
15 2MASX J08491503-5546075 Sy1 08 49 15.0436308312 -55 46 07.904667576   16.7       ~ 6 0
16 2MASX J08532338-5907416 G 08 53 23.390 -59 07 41.63   16.2       ~ 3 0
17 2MFGC 6968 G 08 53 32.5424069496 -60 25 38.657753184   16.5       ~ 5 0
18 ESO 165-7 G 08 54 55.023 -55 53 29.67   16.3       ~ 12 0
19 2MASX J08545724-5855087 GiG 08 54 57.2772937896 -58 55 09.193969092   15.2       ~ 14 0
20 2MASX J08581664-5953252 G 08 58 16.644 -59 53 25.29   15.6       ~ 3 0
21 ESO 125-8 G 09 02 12.5251151736 -58 54 47.713115772   15.9       ~ 12 0
22 2MASX J09035134-5617475 G 09 03 51.343 -56 17 47.54   17.1       ~ 9 0
23 2MFGC 7086 G 09 05 52.1825819328 -55 22 55.327844748   17.1       ~ 12 0
24 ESO 125-9 GiG 09 10 24.379 -58 33 54.39   15.4       ~ 14 0
25 2MASX J09112542-5552391 G 09 11 25.422 -55 52 39.10   17.3       ~ 9 0
26 2MASX J09192655-5934249 G 09 19 26.6065035240 -59 34 25.447430820   16.4       ~ 10 0
27 2MASX J09213859-5926012 G 09 21 38.5434600432 -59 26 00.973755276   16.1       ~ 10 0
28 2MASX J09221283-5928283 G 09 22 12.839 -59 28 28.33   16.4       ~ 10 0
29 2MASX J09225627-5708373 G 09 22 56.2808357592 -57 08 37.500571932   17.1       ~ 9 0
30 ESO 91-11 AG? 09 23 26.788 -63 40 45.30   15.32   14.15 14.5 ~ 30 0
31 ESO 126-12 G 09 27 07.0035956280 -62 34 05.359785960   16.30   14.70   ~ 11 0
32 ESO 126-14 GiG 09 28 26.4677916504 -60 48 06.214600764   13.41   11.60   ~ 24 0
33 2MASX J09291758-6000065 G 09 29 17.5675235136 -60 00 06.739307604   17.4       ~ 10 0
34 ESO 126-17 GiG 09 29 58.3875291144 -62 10 59.509375572   13.45   11.79   ~ 21 0
35 ESO 126-21 AG? 09 36 30.2848206744 -62 05 57.407610804   14.44   12.89   ~ 13 0
36 ESO 126-24 GiG 09 38 29.1811989240 -61 49 46.814505708   14.02       ~ 22 0
37 ESO 91-17 AG? 09 38 31.714 -63 56 00.50   14.34   13.8 13.3 ~ 19 0
38 ESO 126-25 GiG 09 38 33.4768190256 -61 44 18.581077212   14.41   12.81 13.0 ~ 23 0
39 2MASX J09411560-4859533 G 09 41 15.6306005424 -48 59 52.825388928   17.0       ~ 3 0
40 2MASX J09414364-6047560 GiG 09 41 43.6570711248 -60 47 55.894672572   16.2       ~ 17 0
41 2MASX J09423212-6401174 G 09 42 32.1475919976 -64 01 17.819761548   16.3       ~ 3 0
42 2MASX J09441142-6457467 G 09 44 11.3668194168 -64 57 46.732541040   17.2       ~ 3 0
43 2MASX J09463886-4807519 G 09 46 38.8296957936 -48 07 51.729451284   17.1       ~ 3 0
44 ESO 213-2 AG? 09 49 16.5155753208 -47 55 12.397519308   13.0   13.0 12.4 ~ 25 0
45 ESO 213-3 G 09 50 34.3225374816 -49 42 47.337761448   15.3       ~ 13 0
46 2MASX J09532356-5101445 G 09 53 23.5641542160 -51 01 44.225777280   17.3       ~ 4 0
47 2MASX J09550969-4926156 G 09 55 09.7282830264 -49 26 15.399803328   17.0       ~ 10 0
48 LEDA 2792100 G 09 56 15.6 -50 13 52   15.4       ~ 3 0
49 ESO 92-1 AG? 09 56 47.9227917792 -65 37 33.130950924   14.30   12.90   ~ 16 0
50 ESO 92-3 AG? 09 59 28.224 -67 18 14.93   15.03       ~ 11 0
51 ESO 92-2 EmG 09 59 28.84633 -64 43 59.0270   15.12   14.48   ~ 21 2
52 2MASX J10004968-6403389 G 10 00 49.687 -64 03 38.96   15.9       ~ 10 0
53 2MASX J10041355-6648438 GiG 10 04 13.4898419784 -66 48 44.221691736   15.0       ~ 16 0
54 ESO 213-6 AG? 10 06 06.405 -50 36 39.77   16.1       ~ 12 1
55 ESO 263-4 AG? 10 06 46.208 -47 41 46.71   14.48   13.08   ~ 16 0
56 WRAY 17-40 PN 10 06 59.5959184368 -64 21 49.897047888     15.8     ~ 33 1
57 LEDA 100067 G 10 09 41.63 -48 59 17.6   16.8       ~ 3 0
58 ESO 92-14 GiG 10 10 52.130 -66 38 50.72   13.38   11.75   ~ 22 0
59 LEDA 100068 AG? 10 11 06.7285637784 -49 07 40.783556820   17.2       ~ 12 0
60 2MASX J10124021-6401533 GiG 10 12 40.214 -64 01 53.35   16.9       ~ 17 0
61 ESO 213-8 G 10 13 42.678 -50 03 13.44   15.9       ~ 3 0
62 ESO 213-9 GiG 10 13 45.6968588496 -52 17 12.999702156   14.6   14.2 14.3 ~ 22 0
63 LEDA 100069 AG? 10 13 47.9467272024 -49 39 33.144014736   17.1       ~ 4 0
64 2MASX J10135996-5145393 AG? 10 13 59.967 -51 45 39.37   17.1       ~ 3 0
65 ESO 92-17 GiG 10 14 18.805 -64 54 22.67   15.36   13.95 14.5 ~ 19 0
66 LEDA 100071 AG? 10 15 43.4891218080 -67 55 26.153497164   16.5       ~ 9 0
67 PMN J1016-5111 rG 10 16 46.62 -51 11 02.6   16.0       ~ 7 1
68 2MASX J10164984-4904472 G 10 16 49.8186271824 -49 04 47.626647924   16.3       ~ 3 0
69 2MASX J10170533-5024469 G 10 17 05.2882636920 -50 24 47.493879732   17.2       ~ 10 0
70 2MFGC 7979 G 10 18 22.009 -51 55 07.45   16.9       ~ 5 0
71 2MASX J10190461-4807014 G 10 19 04.614 -48 07 01.41   15.5       ~ 10 0
72 2MASX J10191142-4941050 G 10 19 11.4162202992 -49 41 05.221232160   15.4       ~ 9 0
73 LEDA 100078 AG? 10 19 45.6849951312 -50 02 45.761342856   16.1       ~ 11 0
74 2MASX J10201092-4841474 G 10 20 10.928 -48 41 47.42   17.5       ~ 3 0
75 2MASX J10201127-6401008 GiG 10 20 11.2259887512 -64 01 00.527158056   15.7       ~ 14 0
76 ESO 92-21 GiG 10 21 05.5193421384 -66 29 31.097169744   13.89   13.5 13.3 ~ 32 0
77 LEDA 100081 AG? 10 21 12.774 -48 45 15.48   16.6       ~ 4 0
78 LEDA 100082 AG? 10 21 19.222 -49 01 34.44   16.6       ~ 4 0
79 2MASX J10231697-5350538 G 10 23 16.970 -53 50 53.87   17.0       ~ 4 0
80 ESO 168-2 AG? 10 24 45.21 -54 47 55.5   14.3   14.2 14.2 ~ 11 0
81 2MASX J10252691-5158242 G 10 25 26.913 -51 58 24.24   18.6       ~ 4 0
82 2MASX J10252831-5158022 G 10 25 28.319 -51 58 02.23   17.7       ~ 5 0
83 2MASX J10253235-4951402 G 10 25 32.355 -49 51 40.21   16.9       ~ 10 0
84 ESO 62-10 AG? 10 25 33.494 -67 44 42.64   13.9   13.9 13.7 ~ 19 0
85 ESO 214-6 AG? 10 27 17.5536018096 -49 07 40.112442372   16.1       ~ 11 0
86 LEDA 30749 AG? 10 27 19.6377961440 -49 06 59.328355248   15.6   14.9 14.7 ~ 14 0
87 ESO 214-7 AG? 10 28 15.7030065936 -50 31 01.957323468   15.7       ~ 13 0
88 2MASX J10281989-5156182 G 10 28 19.9614425976 -51 56 18.730633704   16.7       ~ 4 0
89 2MASX J10283391-5023310 G 10 28 33.9603883272 -50 23 30.940257444   16.8       ~ 10 0
90 ESO 214-10 GiG 10 28 43.9204934136 -50 58 15.529151100   15.6       ~ 19 0
91 ESO 214-11 GiG 10 28 47.9233376640 -50 41 57.376620348   15.4       ~ 13 0
92 LEDA 100090 AG? 10 28 58.1936278392 -67 30 51.601262076   16.6       ~ 12 0
93 ACO S 636 ClG 10 29 41.0957 -35 19 32.908           ~ 248 0
94 2MASX J10294666-4935170 G 10 29 46.666 -49 35 17.09   16.0       ~ 10 0
95 ESO 214-12 G 10 29 57.396 -50 14 33.01   15.6       ~ 8 0
96 2MASX J10305204-5004111 G 10 30 52.0530720480 -50 04 11.088009048   16.2       ~ 10 0
97 LEDA 100093 AG? 10 31 24.0394018176 -51 22 40.122187464   16.3       ~ 4 0
98 ESO 92-22 GiG 10 31 57.26 -63 42 30.6   14.46   13.8 13.8 ~ 18 0
99 2MASX J10320072-5003418 G 10 32 00.6771896832 -50 03 42.290252568   17.3       ~ 3 0
100 LEDA 96481 AG? 10 34 56.6936858592 -67 43 20.788213620   14.7   14.5 14.4 ~ 19 0
101 NAME Hydra I Cluster ClG 10 36 36.0 -27 31 04           ~ 905 1
102 2MASX J10382187-5301137 G 10 38 21.877 -53 01 13.79   16.3       ~ 3 0
103 ESO 169-2 AG? 10 48 13.9521732936 -53 18 06.030762732   15.2       ~ 16 0
104 LEDA 100097 AG? 11 02 14.718 -52 57 57.16   16.8       ~ 12 0
105 ESO 169-5 AG? 11 02 31.4205673080 -53 38 33.666140436   14.9       ~ 15 0
106 2MASX J11191797-5456561 G 11 19 17.9554281648 -54 56 55.962542832   17.1       ~ 9 0
107 2MASX J11192492-5344047 G 11 19 24.928 -53 44 04.71   17.0       ~ 3 0
108 2MASX J11252636-5317432 G 11 25 26.3201018880 -53 17 43.700133264   16.8       ~ 9 0
109 ESO 170-3 AG? 11 26 08.5656799632 -54 14 09.270576780   14.6       ~ 15 0
110 ESO 170-4 AG? 11 26 41.1311375976 -54 15 20.548246752   14.7   14.4 14.1 ~ 19 0
111 LEDA 100101 AG? 11 28 59.7900043080 -58 25 22.648527480   12.82 12.02     ~ 9 0
112 LEDA 100102 AG? 11 29 54.327 -55 28 10.00   15.8       ~ 12 0
113 2MASX J11321325-5337233 G 11 32 13.2677876328 -53 37 23.142244908   16.9       ~ 3 0
114 2MASX J11383797-5450094 G 11 38 37.972 -54 50 09.42   16.2       ~ 10 0
115 2MASX J11462422-5502144 G 11 46 24.2330391384 -55 02 14.170570116   17.3       ~ 10 0
116 2MASX J11471253-5240564 G 11 47 12.5791896816 -52 40 56.787682008   17.3       ~ 4 0
117 2MFGC 9274 GiG 11 49 36.6212933736 -52 51 59.035509612   16.1       ~ 19 0
118 LEDA 100107 AG? 11 52 36.6625759920 -57 17 12.434394084   14.7       ~ 5 0
119 ACO 3526 ClG 12 48 49.2 -41 18 17           ~ 1154 2
120 NAME Pavo Cluster ClG 20 18 14.2 -70 50 41           ~ 49 0
121 NAME ANT-HYA SUPERCL SCG ~ ~           ~ 6 0
122 NAME Vela Star Cloud ClG ~ ~           ~ 26 0

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