The Recurrent Nova CI AQL

Details The Recurrent Nova CI AQL The Recurrent Nova CI AQL

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000cxo..prop..733g&link_type=abstract

Chandra Proposal ID #02308052

Physics

Chandra Proposal Id #02308052

Scientific paper

We propose a 20 ksec ACIS-S observation of the recurrent nova (RN) CI Aql. RNe are expected to emit soft x-rays during an interval after the ejected shell has become optically thin and before the hydrogen shell-burning ceases and the white dwarf cools. A 2 ksec Chandra ACIS-S observation on June 1, 2001 discovered that CI Aql was a soft X-ray source 380 days after outburst. The flux was much smaller than expected. It is possible that the shell is dense and/or expanding slowly; i.e. we may still be near the beginning of the soft X-ray phase. If obscuration is still important, the proposed observation will detect a distinctive spectral signature and will measure the ejected mass, testing whether CI Aql is a possible SNIa progenitor. If obscuration is not important, we will determine the temperature and luminosity of the white dwarf. Making these measurements and adding a second point to the X-ray light curve, will significantly add to the evolving understanding of the properties of RNe.

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