Spatially resolved properties of galaxies from CANDELS+MUSE: Radial extinction profile and insights on quenching

Abstract

Studying the internal processes of individual galaxies at kilo-parsec scales is crucial in enhancing our understanding of galaxy formation and evolution processes. In this work, we investigate the distribution of star formation rate (SFR), specific SFR (sSFR), and dust attenuation across individual galaxies for a sample of 32 galaxies selected from the MUSE-Wide Survey at 0.1 $<\text{z}<$ 0.42 with a dynamic range in stellar masses between $10^{7.7}$ and $10^{10.3}$ M${}_{\odot }$. We take advantage of the high spatial resolution of the MUSE integral-field spectrograph and measure reliable spatially resolved H$\alpha$ and H$\beta$ emission line maps for individual galaxies. We also derive resolved stellar mass, SFR and dust maps using pixel-by-pixel SED fitting on high resolution multi-band HST/ACS and HST/WFC3 data from the CANDELS survey. By combining these, we analyze the radial profile of various physical parameters across these galaxies. We observe a radial dependence in both stellar and nebular color excess profiles peaking at the inner regions of galaxies. We also find the color excess profiles to most strongly correlate with the integrated sSFRs of galaxies. The median sSFR${}_{\mathrm{H}\alpha }$ radial profiles of galaxies in our sample show a 0.8 dex increase from the central regions outward. This increase compared to the almost flat median radial profile of sSFR${}_{\mathrm{SED}}$, which traces longer timescales of star formation, is in favor of the inside-out quenching of star formation. We bring further evidence for this quenching scenario from the locus of different subregions of galaxies on the SFR-M${}_{\ast }$ and sSFR-M${}_{\ast }$ relations.

9 pages, 9 figures, accepted for publication in The Astrophysical Journal

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Cited by in corpus (8)

• A panchromatic spatially-resolved analysis of nearby galaxies -- I. Sub-kpc scale Main Sequence in grand-design spirals
• SDSS-IV MaNGA: spatially resolved dust attenuation in spiral galaxies
• Testing the Relationship Between Bursty Star Formation and Size Fluctuations of Local Dwarf Galaxies
• Spatially resolved mass-metallicity relation at z~0.26 from the MUSE-Wide Survey
• Exploring the Correlation between $\mathrm{H}\alpha$-to-UV Ratio and Burstiness for Typical Star-forming Galaxies at $z\sim 2$
• The MOSDEF Survey: The Dependence of H$\alpha$-to-UV SFR Ratios on SFR and Size at $z\sim 2$
• Radial profiles of lensed $z\sim 1$ galaxies on sub-kiloparsec scales
• The MAGPI survey: The interdependence of the mass, star formation rate, and metallicity in galaxies at z~0.3