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When does an old nova become a dwarf nova? Kinematics and age of the nova shell of the dwarf nova AT Cnc
Michael M. Shara, Laurent Drissen, Thomas Martin +1
The Z Cam-type dwarf nova AT Cnc displays a classical nova (CN) shell, demonstrating that mass transfer in cataclysmic binaries decreases substantially after a CN eruption. The hib…
The chaotic four-body problem in Newtonian gravity I: Identical point-particles
Nathan W. C. Leigh, Nicholas C. Stone, Aaron M. Geller +4
In this paper, we study the chaotic four-body problem in Newtonian gravity. Assuming point particles and total encounter energies 0, the problem has three possible outcomes.…
A Survey of the Local Group of Galaxies for Symbiotic Binary Stars. I. First detection of symbiotic stars in M33
Joanna Mikolajewska, Michael M. Shara, Nelson Caldwell +2
We present and discuss initial selection criteria and first results in M33 from a systematic search for extragalactic symbiotic stars. We show that the presence of diffuse interste…
On the origins of enigmatic stellar populations in Local Group galactic nuclei
Nathan W. C. Leigh, Fabio Antonini, Nicholas C. Stone +2
We consider the origins of enigmatic stellar populations in four Local Group galactic nuclei, specifically the Milky Way, M31, M32 and M33. These are centrally concentrated blue st…
A far-ultraviolet variable with an 18-minute period in the globular cluster NGC 1851
D. R. Zurek, C. Knigge, T. J. Maccarone +5
We present the detection of a variable star with an minute period in far-ultraviolet (FUV) images of the globular cluster NGC 1851 taken with the Hubble Space Telescope (HS…
When does a star cluster become a multiple star system? I. Lifetimes of equal-mass small-N systems
Nathan W. C. Leigh, Michael M. Shara, Aaron M. Geller
What is the difference between a long-lived unstable (or quasi-stable) multiple star system and a bona fide star cluster? In this paper, we present a possible framework to address…