Surface photometry, mass distributions and stability of the NGC 3686 quartet of galaxies

Details Surface photometry, mass distributions and stability of the NGC 3686 quartet of galaxies Surface photometry, mass distributions and stability of the NGC 3686 quartet of galaxies

Apr 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.191..123b&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 191, Apr. 1980, p. 123-133.

Astronomy and Astrophysics

Astronomy

4

Astronomical Photometry, Astronomical Spectroscopy, Galactic Clusters, Mass Distribution, Systems Stability, Galactic Rotation, Luminous Intensity

Scientific paper

Surface photometry and long slit spectroscopy is presented for the NGC /84/86/9l quartet of galaxies. Total B magnitudes are 11.81, 11.92, 11.59 and 12.41 respectively after correction for galactic absorption. Total mass estimates based on partial rotation curves for NGC 3684/86/91 are 4.9, 3.2 and 2.8 respectively in units of 1010 Msun.
Rigorous formulae are given for the uncertainties in the energy of the system which is 4.58 ± 5.42 × 1057 erg The crossing time for the quartet is 0.8 × 109 yr. The estimated crossing time for the G49 group, of which the quartet form a prominent subgroup, is 9 × 109 yr.

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