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Disentangling the Galactic Halo with APOGEE: II. Chemical and Star Formation Histories for the Two Distinct Populations
Emma Fernández-Alvar, Leticia Carigi, William J. Schuster +13
The formation processes that led to the current Galactic stellar halo are still under debate. Previous studies have provided evidence for different stellar populations in terms of…
Resolved star formation and molecular gas properties of green valley galaxies: a first look with ALMA and MaNGA
Lihwai Lin, Francesco Belfiore, Hsi-An Pan +21
We study the role of cold gas in quenching star formation in the green valley by analysing ALMA CO (1-0) observations of three galaxies with resolved optical spectroscopy fr…
The EDGE-CALIFA Survey: Interferometric Observations of 126 Galaxies with CARMA
Alberto D. Bolatto, Tony Wong, Dyas Utomo +21
We present interferometric CO observations made with the Combined Array for Millimeter-wave Astronomy (CARMA) of galaxies from the Extragalactic Database for Galaxy Evolution surve…
SDSS IV MaNGA - Metallicity and nitrogen abundance gradients in local galaxies
Francesco Belfiore, Roberto Maiolino, Christy Tremonti +9
We study the gas phase metallicity (O/H) and nitrogen abundance gradients traced by star forming regions in a representative sample of 550 nearby galaxies in the stellar mass range…
SDSS-IV MaNGA: The Impact of Diffuse Ionized Gas on Emission-line Ratios, Interpretation of Diagnostic Diagrams, and Gas Metallicity Measurements
Kai Zhang, Renbin Yan, Kevin Bundy +24
Diffuse Ionized Gas (DIG) is prevalent in star-forming galaxies. Using a sample of 365 nearly face-on star-forming galaxies observed by MaNGA, we demonstrate how DIG in star-formin…
A Local Leaky-box Model for the Local Stellar Surface Density - Gas Surface Density - Gas Phase Metallicity Relation
Guangtun Zhu, Jorge K. Barrera-Ballesteros, Timothy M. Heckman +4
We revisit the relation between the stellar surface density, the gas surface density, and the gas-phase metallicity of typical disk galaxies in the local Universe with the SDSS-IV/…