VALES VIII: Weak ionized gas outflows in star-forming galaxies at z 0:15 traced with VLT/MUSE

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dc.contributor.authorCouto, Guilherme S.
dc.contributor.authorHughes, Thomas M.
dc.contributor.authorBoquien, Médéric
dc.contributor.author|Ibar, Eduardo
dc.contributor.authorViaene, Sébastien
dc.contributor.authorLeiton, Roger
dc.contributor.authorXue, Yongquan
dc.date.accessioned2022-11-30T02:46:18Z
dc.date.available2022-11-30T02:46:18Z
dc.date.issued2021
dc.description.abstractWe characterize the ionized gas outflows in 15 low-redshift star-forming galaxies, a Valparaíso ALMA/APEX Line Emission Survey (VALES) subsample, using MUSE integral field spectroscopy and GAMA photometric broadband data. We measure the emission-line spectra by fitting a double-component profile, with the second and broader component related to the outflowing gas. This interpretation is in agreement with the correlation between the observed star-formation rate (SFR) surface density (ΣSFR) and the second-component velocity dispersion (σ2nd), expected when tracing the feedback component. By modeling the broadband spectra with spectral energy distribution fitting and obtaining the star-formation histories of the sample, we observe a small decrease in SFR between 100 and 10 Myr in galaxies when the outflow Hα luminosity contribution is increased, indicating that the feedback somewhat inhibits the star formation within these timescales. The observed emission-line ratios are best reproduced by photoionization models when compared to shock ionization, indicating that radiation from the young stellar population is dominant and seems to be a consequence of a continuous star-formation activity instead of a “bursty” event. The outflow properties, such as the mass outflow rate (∼0.1 M⊙ yr−1), the outflow kinetic power (∼5.2 × 10−4%Lbol), and the mass loading factor (∼0.12), point toward a scenario where the measured feedback is not strong and has a low impact on the evolution of galaxies in general.en_ES
dc.facultadFacultad de Cienciasen_ES
dc.file.nameCouto_Val2021.pdf
dc.identifier.doihttps://doi.org/10.1051/0004-6361/202141490
dc.identifier.urihttp://repositoriobibliotecas.uv.cl/handle/uvscl/7304
dc.languageen
dc.publisherEuropean Southern Observatory (ESO)
dc.rights© ESO 2021
dc.sourceAstronomy & Astrophysics
dc.subjectGALAXIES: EVOLUTIONen_ES
dc.subjectGALAXIES: ISMen_ES
dc.subjectGALAXIESen_ES
dc.subjectKINEMATICS AND DYNAMICSen_ES
dc.subjectGALAXIES: STAR FORMATIONen_ES
dc.subjectISM: JETS AND OUTFLOWSen_ES
dc.titleVALES VIII: Weak ionized gas outflows in star-forming galaxies at z 0:15 traced with VLT/MUSE
dc.typeArticulo
uv.departamentoInstituto de Fisica y Astronomia

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