Bibcode
Martín-Fernández, P.; Jiménez-Vicente, J.; Zurita, A.; Mediavilla, E.; Castillo-Morales, A.
Bibliographical reference
Galaxies in 3D across the Universe, Proceedings of the International Astronomical Union, IAU Symposium, Volume 309, pp. 312-312
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2
2015
Citations
0
Refereed citations
0
Description
Galactic winds and outflows are an ubiquitous phenomenon in galaxies
with active star formation and/or active nuclei. They constitute the
main mechanism for redistributing dust and metals on large scales and
are therefore a key ingredient to understand the life cycle of galaxies.
Among galaxies, ULIRGs are of particular interest in this context, as
they host intense starbursts and are likely to be the dominant star
formers at z > 1. These objects have been shown to host important
winds, but it is not yet known what is the frequency of galactic winds
and their properties in galaxies with lower star formation rates (SFR).
We are studying galactic winds in a sample of 21 galaxies with different
SFRs (including ULIRGs) from observations with the INTEGRAL fiber
spectrograph on the 4.2m WHT. In order to be able to address the complex
multi-phase nature of the wind phenomenon, we have used the Na I D
doublet absorption lines to trace cold gas, and a few emission lines
(Hα, [N ii] and [S ii]) to trace the warmer ionized gas of the
wind. The distribution and kinematics of both components in these
objects is then analysed. Preliminary results show strong spatial
correlation between regions with high non-circular velocities, areas
with high star formation activity and regions with two different
components in the emission lines. This set of data will help us to
characterise the distribution and kinematics of the winds and their
relation with the host galaxy type.