Barton and Bain, et al. Respond

Kinematic Effects of Tidal Interaction on Galaxy Rotation Curves

“…A range of observational phenomena in our statistical sample of optical rotation curves of galaxies in pairs (Barton et al 1998b) may reflect interactions like those simulated in Fig. 1.…”

“…The pair sample (Barton et al 1998b), consists of ∼ 140 spiral and S0 galaxies in spiral/spiral and spiral/elliptical pairs that are appropriate for longslit emission observations. This "dynamical" sample, when properly compared with control samples and simulations, will enable estimation of the frequency of interaction-induced features.…”

“…This Letter is an investigation of the signatures of interaction in galaxy pairs during the early stages of interaction or merging. Our numerical work with dissipationless N-body simulations (Barton et al 1998a) illustrates that rotation curves of spiral galaxies in pairs can bear specific, predictable signatures of interaction: the flat rotation curves typically associated with these objects in isolation acquire distinct features such as dips near the galactic nucleus and sharply rising or falling profiles in the outer regions of the galactic disk. These features can reflect non-circular motion and depend on the internal structure of the individual galaxies and the orbital parameters of the interaction.…”

“…In observation times that permit construction of large samples, rotation curves provide kinematic data over a strip of each galaxy. Barton et al (1998b) measured ∼ 140 emission line rotation curves in pairs selected from the CfA2 redshift survey (Geller & Huchra 1989;Huchra, Vogeley, & Geller 1998;Falco et al 1998). The data display features which are consistent with Keel's (1993;1996) qualitative studies of rotation curves in a sample of paired and interacting galaxies.…”

HIV and AIDS in Africa

“…43 With a tradition based on Justinian codes (an attempt of the Roman Emperor Justinian in the sixth century to reform the existing consists above all, in assuring whatever is necessary for the cohesion of the group and restoring social peace and understanding among its members." R. DAVID & J. BRIERLEY, supra note 30, at 463. legal system by introducing uniformity), 44 the civil tradition became the universal standard taught through the Middle Ages. Application in the courts, however, often involved a compilation of Roman law and local customary law.…”