Mathematics – Logic
Scientific paper
May 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000dda....31.1102b&link_type=abstract
American Astronomical Society, DDA Meeting #31, #11.02; Bulletin of the American Astronomical Society, Vol. 32, p.867
Mathematics
Logic
Scientific paper
Every morphological feature of NGC 4314 (see http://oposite.stsci.edu/pubinfo/pr/1998/21/ ) is a consequence of stellar or gas dynamics. Past studies have presented photometric evidence for a number of Lindblad Resonances (Benedict et al. 1992. AJ, 103, 757) and have established the dynamics of molecular gas associated with a 20 arcsec diameter nuclear ring (Benedict, Smith, & Kenney 1996, AJ, 112, 1318). Present day star formation is found nowhere but in this ring. UBVIH-alpha photometry with Hubble Space Telescope WFPC-2 has provided a means to estimate the ages of star clusters associated with the nuclear ring and for two fainter blue arcs just exterior to the ring. Our chronology suggests that the present epoch of star formation has lasted 20My and that the arcs derive from a similar episode that occurred 150My ago. We still lack a satisfactory explanation for the shape and placement of the blue arcs. Future studies (dynamical modeling and integral field spectroscopy of H-alpha emission) may allow us to distinguish between a shrinking ring and spiral pattern driven by a nuclear bar. Benedict thanks the HST Astrometry Science Team (W. H. Jefferys, P.I., O. G. Franz, W. van Altena, R. Duncombe, P. J. Shelus, L. W. Fredrick, and P. D. Hemenway) for their support and encouragement. This research was supported by NASA Grant NAG5-1603 from Goddard Spaceflight Center.
Benedict George F.
Howell Dale Andrew
Jorgensen Inger
Kenney Jeffrey D. P.
Smith Jeffrey B.
No associations
LandOfFree
NGC 4314 - a Galaxy Dynamicist's Playground does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with NGC 4314 - a Galaxy Dynamicist's Playground, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and NGC 4314 - a Galaxy Dynamicist's Playground will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1128772