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Home List of Titles The first gigayear of bulge star formation in Virgo ellipticals: constraints from their globular cluster systems
Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/91968
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- The first gigayear of bulge star formation in Virgo ellipticals: constraints from their globular cluster systems
- Spitler, Lee R.
- Data products from the Advanced Camera for Surveys Virgo cluster survey are used to understand the bulge star formation history in early-type galaxies at redshifts z≳2. A new technique is developed whereby observed high-redshift age–metallicity relationships are utilized to constrain the typical formation epochs of metal-rich or ‘bulge’ globular clusters. This analysis supports a model where massive Virgo galaxies underwent an extremely intense mode of bulge globular cluster formation at z∼ 3.5 that was followed by an era of significant bulge growth and little globular cluster production. Intermediate-mass galaxies showed a less intense period of globular cluster formation at z∼ 2.5 that was synchronized with the bulk of bulge star growth. The transition between the massive and intermediate-mass galaxy star formation modes occurs at a galaxy stellar mass of Mstellar∼ 3 × 1010 M⊙, the mass where many other galaxy properties are observed to change. Dwarf early-type galaxies in Virgo may have experienced no significant period of bulge globular cluster formation, thus the intense starbursts associated with globular cluster formation may be difficult to directly observe at redshifts z≲ 4. Although the above conclusions are preliminary because they are based upon uncertain relationships between age and metallicity, the technique employed will yield more stringent constraints as high-redshift galaxy observations and theoretical models improve.
- Publication type
- Journal article
- Research centre
- Swinburne University of Technology. Faculty of Information and Communication Technologies. Centre for Astrophysics and Supercomputing
- Monthly Notices of the Royal Astronomical Society, Vol. 406, no. 2 (Aug 2010), pp. 1125-1133
- Publication year
- FOR Code(s)
- 0201 Astronomical and Space Sciences
- Galaxy bulges; Galaxy clusters; Galaxy formation; High-redshift galaxies; Star clusters; Virgo
- Wiley-Blackwell Publishing
- Publisher URL
- Copyright © 2010 The Author. Journal compilation copyright © 2010 Royal Astronomical Society. The accepted manuscript of this paper is reproduced here in accordance with the copyright policy of the publisher. The definitive publication is available at www.interscience.wiley.com.
- Full text
- Peer reviewed