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Multi-Gaussian Deconvolution of Elliptical Sources: Reliability Tests Using Ground-Based and HST Images of m32
Parmeggiani, G.; Bendinelli, O.
Deconvolution of spherical sources from the Point Spread Functions based on multi-Gaussian expansions (RMG method) is here extended to elliptical objects by using bivariate Gaussians. To test accuracy and robustness of this approach, we have first derived the nuclear structure of M32 using observations obtained by the Palomar 60" under mediocre se…
Winds and Accretion in delta Sagittae
Mason, Brian D.; McAlister, Harold A.; Eaton, Joel A. +1 more
The ten-year binary delta Sge (M2 Ib-II+B9.5 V) is a zeta Aur binary containing an abnormally cool component. Combining our analysis of the system as a visual binary with Batten's radial-velocity solution leads to the following properties: i = 40 deg, a = 51 mas = 8.83 A.U. = 1893 solar radius, hence d = 173 pc; MB = 2.9 solar mass and …
The Cooling of the White Dwarf in U Geminorum Following Hearing By Two Different Outbursts
Szkody, Paula; Sion, Edward M.; Huang, Min
We present the analysis of 13 orbital phase-resolved IUE (large and small aperture) SWP spectra, sampling the quiescent intervals of the prototype dwarf nova U Geminorum following two individual outbursts, the outburst of 1992, 29 August-14 September, and the outburst of 1993, 19 March-5 April. The quiescent interval following the outburst 29 Augu…