Masses of the local group and of the M81 group estimated from distortions in the local velocity field

@article{Karachentsev2006MassesOT,
  title={Masses of the local group and of the M81 group estimated from distortions in the local velocity field},
  author={Igor D. Karachentsev and Olga Kashibadze},
  journal={Astrophysics},
  year={2006},
  volume={49},
  pages={3-18}
}
Based on high precision measurements of the distances to nearby galaxies with the Hubble telescope, we have determined the radii of the zero velocity spheres for the local group, R0 = 0.96±0.03Mpc, and for the group of galaxies around M 81/M 82, 0.89±0.05Mpc. These yield estimates of MT = (1.29±0.14)· 1012 M⊙ and (1.03±0.17)· 1012 M⊙, respectively, for the total masses of these groups. The R0 method allows us to determine the mass ratios for the two brightest members in both groups, as well. By… 

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References

SHOWING 1-10 OF 13 REFERENCES

The Local Group and Other Neighboring Galaxy Groups

Over the last few years, rapid progress has been made in distance measurements for nearby galaxies based on the magnitude of stars on the tip of the red giant branch. Current CCD surveys with the

Radial and Transverse Velocities of Nearby Galaxies

Analysis of the peculiar velocities of the galaxies should take account of the uncertainties in both redshifts and distances. We show how this can be done by a numerical application of the action

A Study of Edge-On Galaxies with the Hubble Space Telescope Advanced Camera for Surveys. I. Initial Results

We present the initial results of a Hubble Space Telescope/Advanced Camera for Surveys snapshot survey of 16 nearby, edge-on, late-type galaxies covering a range in distance from 2 to 19 Mpc. The

The Redshift-Distance Relation. IXa. Reinterpretation of the Local Group Deceleration Data Emphasizing the Kahn-Woltjer Mass Determination

The velocity-distance data for the nearest 15 galaxies are reexamined relative to the predicted deceleration curves for the idealized Local Group (LG) dynamical model of Sandage (1986). The

A Catalog of Neighboring Galaxies

We present an all-sky catalog of 451 nearby galaxies, each having an individual distance estimate D ≲ 10 Mpc or a radial velocity VLG < 550 km s-1. The catalog contains data on basic optical and H I

The Extinction and Distance of Maffei 1

We have obtained low- and high-resolution spectra of the core of the highly reddened elliptical galaxy Maffei 1. From these data, we have obtained the first measurement of the Mg2 index and have

Probing the Multiphase Interstellar Medium of the Dwarf Starburst Galaxy NGC 625 with Far Ultraviolet Spectroscopic Explorer Spectroscopy

We present new Far Ultraviolet Spectroscopic Explorer (FUSE) spectroscopy of the dwarf starburst galaxy NGC 625. These observations probe multiple phases of the interstellar medium (ISM), including

The very local Hubble flow

We present Hubble Space Telescope/WFPC2 images of eighteen galaxies situated in the vicinity of the Local Group (LG) as part of an ongoing snapshot survey of nearby galaxies. Their distances derived

First-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters

WMAP precision data enable accurate testing of cosmological models. We find that the emerging standard model of cosmology, a flat Λ-dominated universe seeded by a nearly scale-invariant adiabatic

The redshift-distance relation. IX: Perturbation of the very nearby velocity field by the mass of the Local Group

Une deceleration de l'expansion cosmologique locale peut etre presente dans les donnees relatives aux galaxies et aux groupes de galaxies de distances inferieures a 10 Mpc. L'effet est faible, a la