356 citations · 652 across the 14 of their papers we have counts for
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SDSS-IV MaNGA: the chemical co-evolution of gas and stars in spiral galaxies
Michael J. Greener, Alfonso Aragón-Salamanca, Michael Merrifield +7
We investigate archaeologically how the metallicity in both stellar and gaseous components of spiral galaxies of differing masses evolve with time, using data from the SDSS-IV MaNG…
Photometric Signature of Ultra-Harmonic Resonances in Barred Galaxies
Dhanesh Krishnarao, Zachary J. Pace, Elena D'Onghia +11
Bars may induce morphological features, such as rings, through their resonances. Previous studies suggested that the presence of 'dark-gaps', or regions of a galaxy where the diffe…
Size, shade or shape? The contribution of galaxies of different types to the star-formation history of the Universe from SDSS-IV MaNGA
Thomas Peterken, Alfonso Aragón-Salamanca, Michael Merrifield +7
By fitting stellar populations to SDSS-IV MaNGA survey observations of ~7000 suitably-weighted individual galaxies, we reconstruct the star-formation history of the Universe, which…
SDSS-IV MaNGA: the "G-dwarf problem" revisited
Michael J. Greener, Michael Merrifield, Alfonso Aragón-Salamanca +3
The levels of heavy elements in stars are the product of enhancement by previous stellar generations, and the distribution of this metallicity among the population contains clues t…
SDSS-IV MaNGA: When is morphology imprinted on galaxies?
Thomas Peterken, Michael Merrifield, Alfonso Aragón-Salamanca +4
It remains an open question as to how long ago the morphology that we see in a present-day galaxy was typically imprinted. Studies of galaxy populations at different redshifts reve…
SDSS-IV MaNGA: The link between bars and the early cessation of star formation in spiral galaxies
Amelia Fraser-McKelvie, Michael Merrifield, Alfonso Aragón-Salamanca +9
Bars are common in low-redshift disk galaxies, and hence quantifying their influence on their host is of importance to the field of galaxy evolution. We determine the stellar popul…
SDSS-IV MaNGA: Excavating the fossil record of stellar populations in spiral galaxies
Thomas Peterken, Michael Merrifield, Alfonso Aragón-Salamanca +5
We perform a "fossil record" analysis for ~800 low-redshift spiral galaxies, using STARLIGHT applied to integral field spectroscopic observations from the SDSS-IV MaNGA survey to o…
SDSS-IV MaNGA: spatially resolved dust attenuation in spiral galaxies
Michael J. Greener, Alfonso Aragón-Salamanca, Michael R. Merrifield +9
Dust attenuation in star-forming spiral galaxies affects stars and gas in different ways due to local variations in dust geometry. We present spatially resolved measurements of dus…
Time-slicing spiral galaxies with SDSS-IV MaNGA
Thomas Peterken, Amelia Fraser-McKelvie, Alfonso Aragón-Salamanca +6
Spectra of galaxies contain a wealth of information about the stellar populations from which they are made. With integral-field unit (IFU) surveys, such data can be used to map out…
SDSS-IV MaNGA: Stellar Population Gradients Within Barred Galaxies
Amelia Fraser-McKelvie, Michael Merrifield, Alfonso Aragón-Salamanca +11
Bars in galaxies are thought to stimulate both inflow of material and radial mixing along them. Observational evidence for this mixing has been inconclusive so far however, limitin…
SDSS IV MaNGA: Full spectroscopic bulge-disc decomposition of MaNGA early-type galaxies
Martha Tabor, Michael Merrifield, Alfonso Aragon-Salamanca +5
By applying spectroscopic decomposition methods to a sample of MaNGA early-type galaxies, we separate out spatially and kinematically distinct stellar populations, allowing us to e…
SNITCH: Seeking a simple, informative star formation history inference tool
R. J. Smethurst, M. Merrifield, C. J. Lintott +7
Deriving a simple, analytic galaxy star formation history (SFH) using observational data is a complex task without the proper tool to hand. We therefore present SNITCH, an open sou…
A direct test of density wave theory in a grand-design spiral galaxy
Thomas Peterken, Michael Merrifield, Alfonso Aragon-Salamanca +5
The exact nature of the arms of spiral galaxies is still an open question. It has been widely assumed that spiral arms in galaxies with two distinct symmetrical arms are the produc…