Complex gas kinematics in compact, rapidly assembling star-forming galaxies
Deep, high-resolution spectroscopic observations have been obtained for six compact, strongly star-forming galaxies at redshift z 0.1-0.3, most of them also known as green peas. Remarkably, these galaxies show complex emission-line profiles in the spectral region including Hα, [NII]λλ6548, 6584Å, an...
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| Autores principales: | , , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2012
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/84688 |
| Aporte de: |
| id |
I19-R120-10915-84688 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Astronómicas galaxies: dwarf galaxies: evolution galaxies: kinematics and dynamics galaxies: starburst |
| spellingShingle |
Ciencias Astronómicas galaxies: dwarf galaxies: evolution galaxies: kinematics and dynamics galaxies: starburst Amorín, R. Vílchez, J. M. Hägele, Guillermo Federico Firpo, Verónica Pérez-Montero, E. Papaderos, P. Complex gas kinematics in compact, rapidly assembling star-forming galaxies |
| topic_facet |
Ciencias Astronómicas galaxies: dwarf galaxies: evolution galaxies: kinematics and dynamics galaxies: starburst |
| description |
Deep, high-resolution spectroscopic observations have been obtained for six compact, strongly star-forming galaxies at redshift z 0.1-0.3, most of them also known as green peas. Remarkably, these galaxies show complex emission-line profiles in the spectral region including Hα, [NII]λλ6548, 6584Å, and [SII]λλ6717, 6731Å, consisting of the superposition of different kinematical components on a spatial extent of few kiloparsecs: a very broad line emission underlying more than one narrower component. For at least two of the observed galaxies some of these multiple components are resolved spatially in their two-dimensional spectra, whereas for another one a faint detached Hα blob lacking stellar continuum is detected at the same recessional velocity ∼ 7kpc away from the galaxy. The individual narrower Hα components show high intrinsic velocity dispersion (σ ∼30-80kms<sup>-1</sup>), suggesting together with unsharped masking Hubble Space Telescope images that star formation proceeds in an ensemble of several compact and turbulent clumps, with relative velocities of up to ∼500kms<sup>-1</sup>. The broad underlying Hα components indicate in all cases large expansion velocities (full width zero intensity ≥1000kms<sup>-1</sup>) and very high luminosities (up to ∼10<sup>42</sup> erg s<sup>-1</sup>), probably showing the imprint of energetic outflows from supernovae. These intriguing results underline the importance of green peas for studying the assembly of low-mass galaxies near and far. |
| format |
Articulo Articulo |
| author |
Amorín, R. Vílchez, J. M. Hägele, Guillermo Federico Firpo, Verónica Pérez-Montero, E. Papaderos, P. |
| author_facet |
Amorín, R. Vílchez, J. M. Hägele, Guillermo Federico Firpo, Verónica Pérez-Montero, E. Papaderos, P. |
| author_sort |
Amorín, R. |
| title |
Complex gas kinematics in compact, rapidly assembling star-forming galaxies |
| title_short |
Complex gas kinematics in compact, rapidly assembling star-forming galaxies |
| title_full |
Complex gas kinematics in compact, rapidly assembling star-forming galaxies |
| title_fullStr |
Complex gas kinematics in compact, rapidly assembling star-forming galaxies |
| title_full_unstemmed |
Complex gas kinematics in compact, rapidly assembling star-forming galaxies |
| title_sort |
complex gas kinematics in compact, rapidly assembling star-forming galaxies |
| publishDate |
2012 |
| url |
http://sedici.unlp.edu.ar/handle/10915/84688 |
| work_keys_str_mv |
AT amorinr complexgaskinematicsincompactrapidlyassemblingstarforminggalaxies AT vilchezjm complexgaskinematicsincompactrapidlyassemblingstarforminggalaxies AT hageleguillermofederico complexgaskinematicsincompactrapidlyassemblingstarforminggalaxies AT firpoveronica complexgaskinematicsincompactrapidlyassemblingstarforminggalaxies AT perezmonteroe complexgaskinematicsincompactrapidlyassemblingstarforminggalaxies AT papaderosp complexgaskinematicsincompactrapidlyassemblingstarforminggalaxies |
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Repositorios |
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