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Merging MaNGA and HST to Explore the Connection Between Star Formation and the Circumgalactic Medium
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AAS
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2024
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Abstract
Patterns of inflowing and outflowing gases from the circumgalactic medium (CGM) provide a method of recycling star-forming materials in the galaxy. To probe the CGM, we have selected 15 edge-on galaxies (inclination greater than 60 degrees) from the SDSS/Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) project that have archival observations of a background active galactic nucleus (AGN) within 0.8 Rvir of the galaxy’s center. MaNGA observations provide spatially and kinematically resolved spectra that allow us to infer ionization properties, stellar velocities, star formation, etc. in various regions of the galaxy. We select edge-on galaxies specifically so that the projection effects from the disk are minimized when examining spectra from the background AGN. We use the Marvin Python package to provide spatially-resolved dust attenuation corrections and star-formation rates across each galaxy. We seek to characterize the CGMs with archival Hubble Space Telescope UV observations of background AGN sightlines. Absorption of the light from background AGN by the gas in the halos will provide crucial information on the composition and physical properties of the gas surrounding these galaxies. By combining MaNGA emission line and HST absorption line spectra we can gain insight into the effect the CGM has on star formation.
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Physics and Astronomy