NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-02-17 T20:36:46 PST
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For refcode 2000A&A...355..835E:
Retrieve 96 NED objects in this reference.
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Copyright by European Southern Observatory (ESO). Reproduced by permission
2000A&A...355..835E Investigations of the Local Supercluster velocity field. III. Tracing the backside infall with distance moduli from the direct Tully-Fisher relation. EKHOLM T., LANOIX P., TEERIKORPI P., FOUQUE P., PATUREL G. Received 20 December 199/Accepted 25 January 2000 Abstract: We have extended the discussion of Paper II (Ekholm et al.,1999) to cover also the backside of the Local Supercluster (LSC) by using 96 galaxies within {THETA}<300 from the adopted centre of LSC and with distance moduli from the direct B-band Tully-Fisher relation. In order to minimize the influence of the Malmquist bias we required log V_max_ > 2.1 and {sigma}B_T_ < 0.2 mag. We found out that if R_Virgo_ < 20 Mpc this sample fails to follow the expected dynamical pattern from the Tolman-Bondi (TB) model. When we compared our results with the Virgo core galaxies given by Federspiel et al. (1998) we were able to constrain the distance to Virgo: R_Virgo_ = 20- 24 Mpc. When analyzing the TB-behaviour of the sample as seen from the origin of the metric as well as that with distances from the extragalactic Cepheid PL-relation we found additional support to the estimate R_Virgo_ = 21 Mpc given in Paper II. Using a two-component mass-model we found a Virgo mass estimate M_Virgo_ = (1.5-2) x M_virial_, where M_virial_ = 9.375 x 10^14^M_sun_ for R_Virgo_ = 21 Mpc. This estimate agrees with the conclusion in Paper I (Teerikorpi et al., 1992). Our results indicate that the density distribution of luminous matter is shallower than that of the total gravitating matter when q_0_ <= 0.5. The preferred exponent in the density power law, {alpha}=~2.5, agrees with recent theoretical work on the universal density profile of dark matter clustering in an Einstein-deSitter universe (Tittley & Couchman, 1999, in press). Key words: cosmology: theory - cosmology: dark matter - cosmology: distance scale - galaxies: distances and redshifts - galaxies: general - galaxies: kinematics and dynamics
Retrieve 96 NED objects in this reference.
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