Population synthesis of DA white dwarfs: constraints on soft X-ray spectra evolutionстатья

Дата последнего поиска статьи во внешних источниках: 27 мая 2015 г.

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[1] Population synthesis of da white dwarfs: constraints on soft x-ray spectra evolution / P. A. Boldin, V. F. Suleimanov, S. I. Blinnikov, S. B. Popov // American Institute of Physics Conference Series. — Vol. 1273 of American Institute of Physics Conference Series. — 2010. — P. 113–116. Extending the population synthesis method to isolated young cooling white dwarfs we are able to confront our model assumptions with observations made in ROSAT All-Sky Survey [1]. This allows us to check model parameters such as evolution of spectra and separation of heavy elements in DA WD envelopes. It seems like X-ray spectrum temperature of these objects is given by the formula [2] TX-ray = min(Teff,Tmax). We have obtained DA WD's birth rate and upper limit of the X-ray spectrum temperature: DA birth rate = 0.61{×}10{-12} pc{-3}yr{-1}, Tmax = 4.1{×}10{4} K. These values are in good correspondence with values obtained by [3, 2]. From this fact we also conclude that our population synthesis method is applicable to the population of close-by isolated cooling white dwarfs as well as to the population of the isolated cooling neutron stars. [ DOI ]

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