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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:1
UID:UW-Physics-Event-6444
DTSTART:20210510T170000Z
DTEND:20210510T180000Z
DTSTAMP:20260414T220319Z
LAST-MODIFIED:20210505T131400Z
LOCATION:https://uwmadison.zoom.us/j/96822123897?pwd=Z0ZESm1CNFRkUTVEM
 EIxM2RuN3h0UT09
SUMMARY:Monday Science Seminar w/ Dr. Adam Schaefer (MPIA)\, Monday Sc
 ience Seminar\, Adam Schaefer\, Max Planck Institute for Astrophysics
DESCRIPTION:SDSS IV MaNGA: Exploring the local scaling relations for N
 itrogen and their implications for galaxy evolution<br>
\n<br>
\nThe m
 easured chemical abundances in galaxies are useful for constraining th
 eir formation histories and the details of their evolution. The abunda
 nce of oxygen has been shown to trace the buildup of stellar mass in g
 alaxies on both global and local scales. Nitrogen\, however\, is produ
 ced on different timescales to oxygen\, and therefore may provide a se
 condary constraint on our galaxy evolution models. I use data from the
  SDSS IV: Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) 
 survey to investigate whether similar scaling relations hold for nitro
 gen as for oxygen. I find that the observed abundances cannot be expla
 ined by simple models for the evolution of nitrogen in galaxies. Contr
 ary to previous literature\, the ratio of N/O depends on the\, star fo
 rmation rate\, total stellar mass and sizes of galaxies. These results
  pose problems for the universal applicability of some optical gas-pha
 se metallicity calibrations. They also hint that our understanding of 
 how nitrogen is produced and dispersed within galaxies may require rev
 ision.
URL:https://www.physics.wisc.edu/events/?id=6444
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