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Confirmation of Small Dynamical and Stellar Masses for Extreme Emission Line Galaxies at z~2
- Publication Year :
- 2013
-
Abstract
- Spectroscopic observations from the Large Binocular Telescope and the Very Large Telescope reveal kinematically narrow lines (~50 km/s) for a sample of 14 Extreme Emission Line Galaxies (EELGs) at redshifts 1.4 < z < 2.3. These measurements imply that the total dynamical masses of these systems are low (< 3x10^9 M_sun). Their large [O III] 5007 equivalent widths (500-1100 Angstroms) and faint blue continuum emission imply young ages of 10-100 Myr and stellar masses of 10^8-10^9 M_sun, 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.<br />Accepted for publication in ApJL, 5 pages, 1 table, 4 figures
- Subjects :
- Physics
Very Large Telescope
education.field_of_study
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Stellar mass
Astrophysics::High Energy Astrophysical Phenomena
Population
FOS: Physical sciences
Astronomy and Astrophysics
Large Binocular Telescope
Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Galaxy
Redshift
Stars
Space and Planetary Science
Astrophysics::Solar and Stellar Astrophysics
Emission spectrum
Astrophysics::Earth and Planetary Astrophysics
education
Astrophysics::Galaxy Astrophysics
Astrophysics - Cosmology and Nongalactic Astrophysics
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....e0c3536051c005befcfd588b221cd873