A new estimate of the mass of M87

Details A new estimate of the mass of M87 A new estimate of the mass of M87

Oct 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...139..464n&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 139, no. 2, Oct. 1984, p. 464-466.

Astronomy and Astrophysics

Astrophysics

5

Elliptical Galaxies, Galactic Structure, Mass To Light Ratios, Astronomical Photometry, Gravitational Effects, Luminosity, Tides

Scientific paper

The luminosity profile of the compact elliptical galaxy NGC 4486B, companion of M87, follows with a reasonable accuracy a King profile having a tidal radius of 27arcsec. An estimate of its mass can be derived from that of M32. The use of the revised classical von Hoerner's formula in which M87 has a distributed mass M(r) ∝ r+1.3, leads to a mass M > 5.2×1012M_sun; in the central 7arcmin.3 of M87 and to a corresponding M/Lv > 58 for an adopted distance of 15 Mpc. A conservative assumption of a point mass would have given M > 3.3×1012M_sun; and M/Lv > 38. These results are in excellent agreement with estimates of the M87 mass from recent X-ray observations.

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