Other
Scientific paper
Dec 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...191.7909s&link_type=abstract
American Astronomical Society, 191st AAS Meeting, #79.09; Bulletin of the American Astronomical Society, Vol. 29, p.1337
Other
Scientific paper
Spectra of 9 candidate young globular clusters in the merger remnant NGC 7252 have been obtained with the CTIO 4-m telescope and cover lambda lambda 3600--5500 Angstroms at a resolution of 4--5 Angstroms. One of the objects turns out to be a background galaxy, while the other 8 objects are clusters associated with NGC 7252. Seven of these clusters show strong Balmer absorption lines indicative of ages of about 200--600 Myr, while the eighth --- lying in a known H II region --- features emission lines and is likely ≲10 Myr old. Based on Bruzual & Charlot (1997) models, the metallicities of the two bright clusters NGC 7252:W3 and W6 are approximately solar (Z=1.0(+1.0}_{-0.5) Zsun). The line-of-sight velocity dispersion of the 8 clusters is 147 km s(-1) , similar to that of the globular clusters in NGC 5128 and indicative of a moderately massive host galaxy. These spectroscopic results support the notion that the merger of two spiral galaxies in NGC 7252 triggered the formation of a new subsystem of globular clusters of roughly solar metallicity.
Schweizer Francois
Seitzer Pat
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