Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...183.4303k&link_type=abstract
American Astronomical Society, 183rd AAS Meeting, #43.03; Bulletin of the American Astronomical Society, Vol. 25, p.1356
Astronomy and Astrophysics
Astronomy
1
Scientific paper
Radial distributions of Hα and R-band emission and optical rotation curves are presented for a sample of Virgo Cluster and isolated galaxies. These results are part of a study on the influence of dynamics and environment on star formation in cluster and isolated galaxies. We seek to explain why galaxies in the Virgo Cluster have less star formation than do isolated galaxies of the same type and size, and identify specific environmental process which alter galaxy morphology. Our approach is to describe quantitatively the rates and patterns of star formation in both isolated and cluster galaxies and identify the dominant dynamical influences which control them. Environmental signatures will then be sought by comparison of the cluster and isolated samples. The radial distributions of star formation, as traced by the Hα emission, and optical rotation curves are presented for 20 of our sample galaxies. Preliminary results show a good correlation between the predicted location of resonances and peaks and valleys in the radial patterns of star formation in several galaxies. Many HI-deficient galaxies near the cluster core have truncated star-forming disks.
Kenney Jeffrey D. P.
Koopmann Rebecca A.
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