Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.8004s&link_type=abstract
HST Proposal ID #8004
Astronomy and Astrophysics
Astrophysics
Hst Proposal Id #8004 Stellar Astrophysics
Scientific paper
It has recently been suggested that the nova rate in galaxies of different types depends on the galaxy star formation history. Similarly, ground based surveys of a half dozen relatively nearby galaxies suggest that the nova population of a galaxy is well represented by two different distributions: the fast, bright ``disk'' novae, concentrated towards the galactic plane {|z|<100pc} and the slow ``thick-disk/bulge'' novae, almost two magnitudes fainter than the disk ones, extending up to |z|<1000pc. We propose to use WFPC2 archival, multi epoch images of 90 galaxies to search for erupting novae. The detection of even one or two novae per galaxy per epoch will allow us to perform a much more definitive test than heretofore possible on the hypothesis that bulges and disks produce novae at different rates. This will yield strong constraints on future efforts to model the formation and evolution of close binary populations in external galaxies.
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