Physics
Scientific paper
Jul 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009hst..prop12231s&link_type=abstract
HST Proposal ID #12231. Cycle 18
Physics
Scientific paper
While the accreting pulsating white dwarfs in dwarf novae systems only have outbursts recur on 20-30 yr timescales, 4 of the 13 known had outbursts in 2006-2007. The white dwarfs stopped pulsating, as the outburst heating caused them to move out of the instability strip. These outburst events give us the unprecedented opportunity to follow the emergence of the non-radial pulsations as they re-enter the strip. Unlike single white dwarfs, where cooling takes place on thousand year timescales, the cooling rates for white dwarfs following dwarf nova outbursts are only 3-5 yrs, with Cycle 18 ideally suited to catch this transition. Our past HST observations have shown that the UV is critical to a correct temperature determination {the white dwarf dominates over the disk emission in the UV and the Ly alpha turnover provides a crucial constraint} and mode identification {the UV/optical pulsation amplitude is typically 6-17 and indicative of low order modes}. We propose to use COS in TIME-TAG mode to obtain the temperatures and UV pulsation amplitudes of the 4 post-outburst systems.;
No associations
LandOfFree
An Unprecedented Opportunity to Follow 4 Accreting WDs into the Instabilty Strip does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with An Unprecedented Opportunity to Follow 4 Accreting WDs into the Instabilty Strip, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An Unprecedented Opportunity to Follow 4 Accreting WDs into the Instabilty Strip will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1786001