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The morphological classification as determined by us is indicated in parentheses next to the galaxy name, with our "chaotic circumnuclear dust" (C) category now not including those galaxies with obvious dust lanes (DL). Where the classification has already been made by Martini et al. (2003), we indicate this with "-mp." . 3.16. NGC 3887 Figure 8 (top). Spectrum: H{alpha} and [N II] emission is weak and is obvious only in the NUC spectrum. NGC 3887.---SBab: Fairly small, centrally condensed bulge, becoming very elliptical with increasing radius. Bulge is threaded by a bar with nearly the same P.A. as the bulge major axis. Two-armed spiral pattern commences at the bar ends. The arms can be traced for ~300deg before disappearing. The arms do not have knots, but they are quite lumpy (features much larger than typical star-forming knots). Beyond ~180deg, the arms are traced mainly by these lumps (the diffuse emission is largely lost in the sky). NGC 3887 (SBbc, 1"~71 pc, I=39.5^deg^) Inner isophotes (between a=3" and 25") inside the large-scale bar (e_max_=0.68 at a=33"; PA=181^deg^) are twisted by 22^deg^ SBbc(s)III-III CD-1685-S Jan 2/3, 1981 103aO + GG385 45 min The central region of NGC 3887 is an oval rather than a well-defined bar. The principal reason for classification as a barred spiral is the presence of two thin dust lanes starting on opposite sides of the center, as is usual in prototype SBb and SBbc bars (e.g. NGC 5383; SBb; Hubble Atlas, p. 46; panel 168 here). These remain straight throughout the oval but bend at the end where they begin to accompany the luminous arms. The largest of the many HII regions resolve (core plus halo) at the 2" level. The redshift of NGC 3887 is v_o = 915 km/s. UGCA 246: = NGC 3887 SB(r)bc (RC1) Type: Sand - Sb, vB - Sc* II-III:, Morg - fS2, Hub - Sc, Vauc - SB(r)bc. Small, bright nucleus in a smooth bar with a dark lane. (r): 1.05 arcmin x 0.08 arcmin. Several knotty, branching arms. HMS Note No. 114 Nucleus only. Absorption lines are faint and redshift is uncertain. |