NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-22 T17:09:30 PDT
Help | Comment | NED Home

For refcode 1999MNRAS.304..595G:
Retrieve 140 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by Royal Astronomical Society. 1999MNRAS.304..595G The 3D structure of the Virgo cluster from H-band Fundamental Plane and Tully-Fisher distance determinations G. Gavazzi, A. Boselli, M. Scodeggio, D. Pierini, E. Belsole Accepted 1998 November 30. Received 1998 November 23; in original form 1998 April 23 ABSTRACT We undertook a surface photometry survey of 200 galaxies in the Virgo cluster (complete to B<14.0 mag) carried out in the near-infrared (NIR) H band. Combining velocity dispersion measurements from the literature with new spectroscopic data for 11 galaxies, we derive distances of 59 early- type galaxies using the Fundamental Plane (FP) method. The distances of another 75 late-type galaxies are determined using the Tully-Fisher (TF) method. For this purpose we use the maximum rotational velocity, as derived from HI spectra from the literature, complemented with new H{alpha} rotation curves of eight highly HI-deficient galaxies. The zero-points of the FP and TF template relations are calibrated assuming the distance modulus of Virgo m0=31.0, as determined with the Cepheids method. Using these 134 distance determinations (with individual uncertainties of 0.35 mag (TF) and 0.45 mag (FP)) we find that the distance of cluster A, associated with M87, is m_0_=30.84 +/- 0.06. Cluster B, offset to the south, is found at m_0_= 31.84 +/- 0.10. This subcluster is falling on to A at about 750 km s^-1^. Clouds W and M are at twice the distance of A. Galaxies on the north-west and south-east of the main cluster A belong to two clouds composed almost exclusively of spiral galaxies with distances consistent with A, but with significantly different velocity distributions, suggesting that they are falling on to cluster A at approximately 770 km s^-1^ from the far side and at 200 km s^-1^ from the near side respectively. The mass of Virgo inferred from the peculiar motions induced on its vicinity is consistent with the virial expectation. Key words:galaxies: clusters: individual: Virgo - galaxies: fundamental parameters - galaxies: stellar content
Retrieve 140 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home