1999A&A...351..827E

Query : 1999A&A...351..827E

1999A&A...351..827E - Astronomy and Astrophysics, volume 351827-833 (1999/11-3)

Investigations of the Local Supercluster velocity field. II. A study using Tolman-Bondi solution and galaxies with accurate distances from the Cepheid PL-relation.

EKHOLM T., LANOIX P., TEERIKORPI P., PATUREL G. and FOUQUE P.

Abstract (from CDS):

A sample of 32 galaxies with accurate distance moduli from the Cepheid PL-relation (Lanoix, 1999, Ph.D. Thesis, University of Lyon 1) has been used to study the dynamical behaviour of the Local (Virgo) supercluster. We used analytical Tolman-Bondi (TB) solutions for a spherically symmetric density excess embedded in the Einstein-deSitter universe (q0=0.5). Using 12 galaxies within Θ=30° from the centre we found a mass estimate of 1.62Mvirial for the Virgo cluster. This agrees with the finding of Teerikorpi et al. (1992A&A...260...17T) that TB-estimate may be larger than virial mass estimate from Tully & Shaya (1984ApJ...281...31T). Our conclusions do not critically depend on our primary choice of the global H0=57km/s/Mpc established from SNe Ia (Lanoix, Ph.D. Thesis, University of Lyon 1). The remaining galaxies outside Virgo region do not disagree with this value. Finally, we also found a TB-solution with the H0 and q0 cited yielding exactly one virial mass for the Virgo cluster.

Abstract Copyright: ∼

Journal keyword(s): cosmology: theory - cosmology: distance scale - galaxies: distances and redshifts - galaxies: general - galaxies: kinematics and dynamics - galaxies: Local Group

Simbad objects: 33

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Number of rows : 33
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 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
2 NGC 300 GiG 00 54 53.4465638304 -37 41 03.168402396 8.83 8.69 8.13 7.46   ~ 1614 2
3 IC 1613 GiC 01 04 48.4071 +02 07 10.185   10.42 10.01 9.77   ~ 1316 2
4 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
5 NGC 925 H2G 02 27 16.913 +33 34 43.97   10.69 10.12 9.55   ~ 818 1
6 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1987 2
7 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
8 NGC 2090 GiG 05 47 01.8557074752 -34 15 01.679264784 12.17 11.70 11.20 10.43 11.0 ~ 206 1
9 NGC 2541 GiG 08 14 40.1160678912 +49 03 42.021679932 12.03 12.26 11.80     ~ 333 1
10 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4725 3
11 Z 36-12 H2G 10 00 00.8217342072 +05 20 09.533389560 12.77 12.25 11.89 11.71   ~ 569 0
12 NGC 3109 AG? 10 03 06.877 -26 09 34.46 11.10 10.42 10.04 9.91   ~ 825 2
13 MCG-01-26-030 H2G 10 11 00.5 -04 41 30 12.48 12.13 11.93 11.78   ~ 789 2
14 NGC 3198 EmG 10 19 54.990 +45 32 58.88 10.83 10.87 10.33     ~ 946 1
15 M 95 GiP 10 43 57.7313485800 +11 42 13.301191332 10.71 10.51 9.73 9.48   ~ 1238 2
16 M 96 GiP 10 46 45.744 +11 49 11.78 10.42 10.15 9.25 8.99   ~ 862 1
17 NGC 3621 Sy2 11 18 16.300 -32 48 45.36 10.10 9.44 9.56 8.07 10.1 ~ 661 3
18 M 66 AGN 11 20 15.0 +12 59 29 9.85 9.65 8.92     ~ 1509 4
19 M 100 AGN 12 22 54.9299993592 +15 49 20.296257960 10.04 10.05 9.35     ~ 1963 2
20 NGC 4414 GiC 12 26 27.1276893168 +31 13 24.626206488 11.12 10.96 10.12     ~ 593 2
21 NAME Local Supercluster SCG 12 31 +12.4           ~ 566 0
22 NGC 4496 GiP 12 31 39.2222392512 +03 56 21.641352828   11.71       ~ 376 0
23 NGC 4535 H2G 12 34 20.3443516704 +08 11 51.908488116   11.1       ~ 679 0
24 NGC 4536 H2G 12 34 27.12887 +02 11 16.3680 11.14 11.16 10.55 17.393   ~ 913 3
25 M 91 LIN 12 35 26.4446761320 +14 29 46.760333748   14.63 13.57     ~ 639 0
26 NGC 4603 GiG 12 40 55.2223531200 -40 58 35.061387924   12.42 11.30 10.96 11.5 ~ 125 0
27 NGC 4639 Sy1 12 42 52.3785000336 +13 15 26.706153600   13.62 12.72     ~ 642 0
28 NGC 4725 Sy2 12 50 26.5716367992 +25 30 02.733090588   13.45 12.44     ~ 727 2
29 IC 4182 BiC 13 05 48.7478324064 +37 36 12.965157684   11.86   11.40   ~ 344 1
30 NGC 5253 rG 13 39 55.990 -31 38 24.11 11.48 10.94 10.49 10.33 13.47 ~ 1421 4
31 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 3138 2
32 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1661 0
33 NGC 7331 LIN 22 37 04.0506038088 +34 24 56.800076508 10.65 10.35 9.48     ~ 1284 2

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