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7/7/2025 3:51:50 PM
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  • Institute of Astronomy and Astrophysics
3D kinematic modeling of gaseous disks

2024-09-30 12:00 - 12:40

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Abstract:

One of the main observational quantities we aim to obtain from resolved spectroscopic-line observations is related to kinematics. That is, how the gas behaves under the presence of a gravitational potential and the local conditions of the ISM. There are however challenges to overcome when trying to recover kinematics from observations. These are related to instrumental configurations and the local atmospheric conditions of the observation, i.e., the line spread function (LSF/ spectral broadening) and the point spread function (PSF/Beam). These two effects, artificially broaden the observed spectral line, preventing the proper characterization of the intrinsic kinematics. In this talk, I will briefly show how to recover the intrinsic circular (and noncircular) rotation and velocity dispersion, from 3D spectroscopic observations (2 spatial and one spectral axes) like IFS, ALMA, etc. This technique is applied to galaxy gaseous disks from HI to IR, but can be extended to any emission-line disk.

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