Visibility moments and power spectrum of turbulence velocity
Prasun Dutta
TL;DR
This paper introduces a novel method using visibility moments to estimate the turbulent velocity power spectrum in external spiral galaxies, validated through simulations especially effective for galaxies with low inclination angles.
Contribution
It presents the first method based on visibility moments to determine the turbulent velocity power spectrum in external galaxies, confirmed by numerical simulations.
Findings
Effective for galaxies with low inclination angles
Validated through numerical simulations
Unique method for external galaxy turbulence analysis
Abstract
Here we introduce moments of visibility function and discuss how those can be used to estimate the power spectrum of the turbulent velocity of external spiral galaxies. We perform numerical simulation to confirm the credibility of this method and found that for galaxies with lower inclination angles it works fine. This is the only method to estimate the power spectrum of the turbulent velocity fluctuation in the ISM of the external galaxies.
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