Oral Presentation

Spatially Resolved Panchromatic SED fitting of Nearby Galaxies: Resolved Properties of Stars, Dust, and Gas

Author(s): Abdurro'uf

Presenter: Abdurro'uf Abdurro'uf (ASIAA)

We study spatially resolved properties (on ~1 kpc out to at least 3 effective radii) of the stars, dust, and gas in ten nearby spiral galaxies. The properties of the stellar population and dust are derived by fitting the spatially resolved SED with more than 20 bands ranging from FUV to FIR. Our newly developed software piXedfit performs PSF matching, pixel binning, and models the FUV–FIR SED through the energy balance approach. With this self-consistent analysis, we discuss various aspects related to the interplays of the baryonic components in galaxies. Among the key scientific results are: (1) spatially resolved IRX-beta relation; (2) pieces of evidence that old stellar populations contribute to the dust heating which causes an overestimation of the SFR derived from the UV and IR luminosities on kpc-scales; (3) the depletion of molecular gas as an important factor in the suppression of the sSFR at the center of galaxies, which lead to the inside-out quenching; (4) the scaling relations among the properties of the stellar populations, dust, and gas on kpc-scales, which include the resolved star-forming main sequence, Kennicutt-Schmidt, and dust scaling relations. Overall, we find the galaxies being quenched in an inside-out manner, and the influences from both global and local processes seem to play roles in governing star formation in galaxies.