110 citations · 146 across the 8 of their papers we have counts for
7 papers · 1 filter
Eclipse time variations and the continued search for companions to short period eclipsing binary systems
George Faillace, David Pulley, Americo Watkins +3
Eclipse time variations have been detected in a number of post common envelope binary systems consisting of a subdwarf B star or white dwarf primary star and cool M type or brown d…
The quest for stable circumbinary companions to post-common envelope sdB eclipsing binaries Does the observational evidence support their existence?
D. Pulley, G. Faillace, D. Smith +2
Context. Period variations have been detected in a number of eclipsing close compact binary subdwarf B stars (sdBs) and these have often been interpreted as caused by circumbinary…
Observing NY Vir and the quest for circumbinary planets
David Pulley, George Faillace, Derek Smith +1
We add 9 new observations of NY Vir and identify four others from AASVO database. Our results indicste that the one and two exo-planet predictions made by earlier authors do not ma…
A new and improved ephemeris for the hot subdwarf eclipsing binary SDSS J082053.53+000843.4
David Pulley, Derek Smith, George Faillace +1
SDSS J082053.53+000843.4 belongs to the HW Vir family of short period binary systems and was first identified by Geier in 2011. Whilst three subsequent papers have focused on the m…
The eclipsing binary HS0705+6700 and the search for circumbinary objects
D. Pulley, G. Faillace, D. Smith +1
HS0705+6700 (also identified as V470 Cam) is a short period (2.3 h) post common envelope detached eclipsing sdB binary system which exhibits transit time variations (TTVs) of a cyc…
EL CVn-type binaries - Discovery of 17 helium white dwarf precursors in bright eclipsing binary star systems
P. F. L. Maxted, S. Bloemen, U. Heber +21
The star 1SWASP J024743.37-251549.2 was recently discovered to be a binary star in which an A-type dwarf star eclipses the remnant of a disrupted red giant star (WASP0247-25B). The…
Investigating the properties of the near contact binary system TW CrB
G. Faillace, C. Owen, D. Pulley +1
TW Coronae Borealis (TW CrB) is a binary system likely to be active showing evidence of starspots and a hotspot. We calculated a new ephemeris based on all available timings from 1…