Open AccessStellar abundance gradients in galactic discs – I. Method and spectral line gradients
Author(s) -
Ryder S. D.,
Fenner Y.,
Gibson B. K.
Publication year - 2005
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2005.08815.x
Subject(s) - physics , astrophysics , spiral galaxy , galaxy , star formation , line (geometry) , astronomy , geometry , mathematics
ABSTRACT We describe the technique of absorption‐line imaging of galaxy discs using the Taurus Tunable Filter on the Anglo‐Australian Telescope and demonstrate its sensitivity to the behaviour of spectral features associated with Mg and Fe. Radial profiles of Mg 2 and Fe5270 line strengths are presented for a sample of eight face‐on spiral galaxies spanning a range of Hubble types. Signatures of phenomena including merger‐induced star formation, H ii rings and galactic bars are also reported. This study demonstrates the capacity of tunable filters to measure Mg and Fe line strengths across the face of spiral galaxies, which can ultimately reveal clues about the star formation history and chemical evolution.