Bibcode
Balick, B.; Kwitter, Karen B.; Corradi, R. L. M.; Hensley, Kerry G.; Henry, Richard B. C.
Referencia bibliográfica
American Astronomical Society, AAS Meeting #224, #121.14
Fecha de publicación:
6
2014
Número de citas
0
Número de citas referidas
0
Descripción
The results of O/H abundances derived from PNe in M31 (accompanying
poster by Hensley et al.) have extended the radius coverage of our
previous gradient studies out to projected disk distances of 100 kpc.
The PNe are drawn from the peak of the [OIII] PNLF which suggests that
their progenitor stars are more massive than about 1.5 M_sun with
evolution lifetimes less than ~2 billion years. However, many of the PNe
in this sample are located in regions without gas and other signatures
of recent star formation. Here we investigate how the measured O/H
abundances of PNe beyond the classical disk of M31 correlate within
stellar groupings that are defined in various ways (region, disk radius,
kinematic deviations from a thin disk model, and proximity to known
stellar streams). The goal is to determine the relationships of the M31
PN sample to any HI and the other stellar populations associated with
the evolution of M31's outer environment.