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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 693578.0, MPI für Astronomie / Publikationen_mpia
Confirmation of small dynamical and stellar masses for extreme emission line galaxies at z ~ 2
Authors:Maseda, M. V.; van der Wel, A.; da Cunha, E.; Rix, H.-W.; Pacifici, C.; Momcheva, I.; Brammer, G. B.; Franx, M.; van Dokkum, P.; Bell, E. F.; Fumagalli, M.; Grogin, N. A.; Kocevski, D. D.; Koekemoer, A. M.; Lundgren, B. F.; Marchesini, D.; Nelson, E. J.; Patel, S. G.; Skelton, R. E.; Straughn, A. N.; Trump, J. R.; Weiner, B. J.; Whitaker, K. E.; Wuyts, S.
Date of Publication (YYYY-MM-DD):2013
Title of Journal:The Astrophysical Journal Letters
Issue / Number:1
Start Page:id. L22 (5 pp)
Audience:Not Specified
Abstract / Description:Spectroscopic observations from the Large Binocular Telescope and the Very Large Telescope reveal kinematically narrow lines (~50 km s–1) for a sample of 14 extreme emission line galaxies at redshifts 1.4 < z < 2.3. These measurements imply that the total dynamical masses of these systems are low (lsim 3 × 109 M ). Their large [O III] λ5007 equivalent widths (500-1100 Å) and faint blue continuum emission imply young ages of 10-100 Myr and stellar masses of 108-109 M , confirming the presence of a violent starburst. The dynamical masses represent the first such determinations for low-mass galaxies at z > 1. The stellar mass formed in this vigorous starburst phase represents a large fraction of the total (dynamical) mass, without a significantly massive underlying population of older stars. The occurrence of such intense events in shallow potentials strongly suggests that supernova-driven winds must be of critical importance in the subsequent evolution of these systems.
Free Keywords:galaxies: dwarf; galaxies: evolution; galaxies: formation; galaxies: high-redshift; galaxies: starburst
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
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