The galaxy shows a slowly declining velocity dispersion profile, with
low rotation, small h_3_ and slightly positive h_4_ values. The
systematic differences with the velocity dispersion profiles of
Franx et al. (1989) and Bertin et al. (1994, Fig. 7) might be partly
due to the 1 arcsec slit used here.
The SB-profile is a composite of data from Bender (unpublished) and from
Lauberts & Valentijn (1989). The outermost data point was not used since
it might be affected by sky-subtraction errors. Because the kinematic
data reach further in towards the center than the photometry, we
extrapolated using a power-law. The fitted central slope of the
SB-profile is -0.15.
Aug 18/19, 1979
103aO + GG385
NGC 7507 is a prototype example of a pure E0 galaxy. Globular
clusters exist in the envelope.
A nucleated dwarf dE5,N companion exists at a separation of 4.5'
nearly due west. The projected linear separation would be 42 kpc
assuming a redshift distance of 32 Mpc (v_o = 1600 km/s; H = 50).
This very round galaxy exhibits an extended region of dust absorption on
the southwest side of the nucleus, thereby confirming the findings of
Sparks et al. (1985). We do not find significant evidence for the
presence of ionized gas.
Residual images reveal extended asymmetric region of dust absorption on
the SW side of the nucleus (cf. also Sparks et al 1985), causing the
Fourier terms in the radius range 10" - 25" (which are indeed most
significant in the B passband). Otherwise no significant isophotal
deviations from ellipses.
Low surface brightness companion 4.6 preceding and 3.4 north.
Low surface brightness object 3.4 north; several faint galaxies near.
=ESO 469- G 19
brightest in group
Pair with NGC 7513 at 18 arcmin.
Non-interacting pair with NGC 7513 at 18 arcmin.