We have presented a poster of new results from our deep imaging survey
of galaxy clusters at the Carnegie Symposium III. The actual poster
is available here Be warned that the poster is
10 MB in size, and will need to be rescaled to print normally.
The conference proceeding related to this poster can be found
here
Along with my long-time collaborators Robin
Ciardullo,George
Jacoby, & Pat
Durrell, we have undertaken a dynamical study of one of our nearest
extragalactic neighbors: M33. Planeatry nebulae make good dynamical
probes, and we can use them to place limits on any "maximal disks" found
in M33. Pat Durell presented a poster of our initial results, which
can be found here.
Along with many collaborators, I have studied the galactic planetary nebulae
SBS1150+599A. The paper has been accepted to the A.J., and is available
here.
A small mini-talk with the results is here
Along with my long-time collaborators Robin
Ciardullo,George
Jacoby, & Pat
Durrell, we have continued our use of extragalactic planetary nebulae
as distance indicators. We have distances for five more spiral galaxies
that also have high quality Cepheid distances, which allows us to compare
the differences between both distance indicators. The paper has been
accepted to the Ap. J., and is available here.
I and my colleagues at the PoPSICL
project
have published our first results on a search in two galaxy clusters for
intracluster light. We find that there is significant evidence for intracluster
light in both clusters, and that Abell 1413 may have the most elliptical
ICL yet discovered. The paper has been accepted to the Ap. J., and is available
here.
I have written a review paper on intracluster planetary nebulae. The paper
is available here.
We have started a survey for intra-group planetary nebulae in the M81 group
of galaxies. This group is known to be strongly interacting (see the beautiful
HI map of Yun, Ho and Lo
displayed
here. See also here).
We found relatively few intra-group PN, but our survey is continuing. Our
IAU 209 conference proceeding on the subject is here.
(68k, Postscript)
We have completed a radial velocity survey for planetary nebulae in the
famous interacting galaxy M51.
We have found a complex velocity distribution in the data, especially in
a tidal-tail structure. With the excellent N-body models by Chris
Mihos, we can easily explain the features in the data without fine
tuning. An MPEG movie that shows our best-fitting model of the interaction
can be seen here The
paper has been accepted to the Ap. J., and is available here