Spectroscopy of globular cluster systems

  1. Get@NRC: Spectroscopy of globular cluster systems (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1017/S1743921306000779
AuthorSearch for:
EditorSearch for: Whitelock, Patricia Ann; Search for: Dennefeld, Michel; Search for: Leibundgut, Bruno
Proceedings titleScientific Requirements for Extremely Large Telescopes
Series titleProceedings of the International Astronomical Union; Volume 1
ConferenceThe Scientific Requirements for Extremely Large Telescopes, Proceedings of the 232nd Symposium of the International Astronomical Union, November 14-18, 2005, Cape Town, South Africa
Pages304305; # of pages: 2
AbstractWe compare [α/Fe], metallicity, and age distributions of globular clusters in elliptical, lenticular, and spiral galaxies, which we derive from Lick line index measurements. We find a large number of globular clusters in elliptical galaxies that reach significantly higher [α/Fe] values (> 0.5 dex) than clusters in lenticular and spiral galaxies. Most of these highly α-enriched globular clusters are old (t > 8 Gyr) and exhibit relatively high metallicities up to solar values. Given the lower [α/Fe] ratios of the diffuse stellar population in early-type galaxies, our results suggest that the extremely α-enhanced globular clusters are members of the the very first generation of star clusters formed, and that their formation epochs likely predate the formation of the majority of stars in giant early-type galaxies.
Publication date
PublisherCambridge University Press
International Astronomical Union
AffiliationNational Research Council Canada
Peer reviewedYes
NRC publication
This is a non-NRC publication

"Non-NRC publications" are publications authored by NRC employees prior to their employment by NRC.

NPARC number13052836
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Record identifier99b90c02-5fb3-4a94-abc1-1d3f7dff618e
Record created2009-11-25
Record modified2017-06-02
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