113 citations · 722 across the 22 of their papers we have counts for
21 papers
The instantaneous mass accretion rate of novae in quiescence: - an archival ultraviolet optical spectral analysis
Patrick Godon, Edward M. Sion, Tim Naylor +1
Based on archival spectra, we derive the quiescent instantaneous mass transfer rates in novae using synthetic disk spectra generated with tlusty, Gaia parallax-derived distances, a…
A 6.3-h superhump in the cataclysmic variable TV Columbae: the longest yet seen
A. Retter, C. Hellier, T. Augusteijn +5
We present results from a two week multi-longitude photometric campaign on TV Col held in 2001 January. The data confirm the presence of a permanent positive superhump found in re-…
Alternatives to Hibernation
T. Naylor
I outline the evidence pertinent to the connection between the nova explosion and mass transfer rates in CVs. I conclude that there is still insufficient evidence to decide whether…
Spectroscopic Evidence for Starspots on the Secondary Star of SS Cygni
N. A. Webb, T. Naylor, R. D. Jeffries
Cataclysmic variables (CVs) are interacting binary systems where a cool, rapidly rotating secondary star passes material to a white dwarf. If this mass loss is to continue then the…
Detection of negative superhumps in a LMXRB -- an end to the long debate on the nature of V1405 Aql (X1916-053)
A. Retter, Y. Chou, T. Bedding
The detection of two similar periodicities (3001 and 3028 s) in the light curve of V1405 Aql, a low mass X-ray Binary (LMXRB), has attracted the attention of many observers. Two ba…
Understanding the LMXB X2127+119 in M15 I. X-ray eclipses and dips
Zach Ioannou, T. Naylor, A. P. Smale +2
We present X-ray observations of the high-inclination low-mass X-ray binary system X2127+119 (AC211) in the globular cluster M15 (NGC 7078). The observations consist of data acquir…
Thermal stability and nova cycles in permanent superhump systems
A. Retter, T. Naylor
Archival data on permanent superhump systems are compiled to test the thermal stability of their accretion discs. We find that their discs are almost certainly thermally stable as…
A TiO study of the black-hole binary GRO J0422+32 in a very low state
N. A. Webb, T. Naylor, Z. Ioannou +2
We present 53 simultaneous photometric (I band) and spectroscopic (6900-9500 Angstroms) observations of J0422+32, taken during December 1997. From these we determine that J0422+32…
A TiO study of the dwarf nova IP Pegasi
G. Beekman, M. Somers, T. Naylor +1
We present red spectra in the region 7000-8300A of the eclipsing dwarf nova IP Peg, with simultaneous narrow-band photometry centered at 7322A. We show that by placing a second sta…
The discovery of a low mass, pre-main-sequence stellar association around gamma Velorum
M. Pozzo, R. D. Jeffries, T. Naylor +3
We report the serendipitous discovery of a population of low mass, pre-main sequence stars (PMS) in the direction of the Wolf-Rayet/O-star binary system gamma^{2} Vel and the Vela…
Outbursts of EX Hydrae: mass-transfer events or disc instabilities?
Coel Hellier, Jonathan Kemp, T. Naylor +5
We present the 45-yr record of EX Hya's lightcurve and discuss the characteristics of its 15 observed outbursts. We then concentrate on the 1998 outburst, reporting the first outbu…
A Spatially Resolved `Inside-out' Outburst of IP Pegasi
N. A. Webb, T. Naylor, Z. Ioannou +6
We present a comprehensive photometric dataset taken over the entire outburst of the eclipsing dwarf nova IP Peg in September/October 1997. Analysis of the lightcurves taken over t…
Optical and ROSAT X-ray observations of the dwarf nova OY Carinae in superoutburst and quiescence
Gabriel W. Pratt, B. J. M. Hassall, T. Naylor +2
We present ROSAT X-ray and optical light curves of the 1994 February superoutburst of the eclipsing SU UMa dwarf nova OY Carinae. There is no eclipse of the flux in the ROSAT HRI l…
An Irradiation Effect in Nova DN Gem 1912 and the Significance of the Period Gap for Classical Novae
A. Retter, E. M. Leibowitz, T. Naylor
Continuous CCD photometry of the classical nova DN Gem during 52 nights in the years 1992-98 reveals a modulation with a period 0.127844 d. The semi-amplitude is about 0.03 mag. Th…
An eclipse of the X-ray flux from the dwarf nova OY Carinae in quiescence
Gabriel W. Pratt, B. J. M. Hassall, T. Naylor +1
We present a phase-resolved ROSAT HRI X-ray light curve of the dwarf nova OY Car in quiescence. The X-ray flux is eclipsed at the same time as the optical eclipse of the primary, a…
On the abundance of Lithium in T Coronae Borealis
T. Shahbaz, P. H. Hauschildt, T. Naylor +1
We have obtained high resolution echelle spectroscopy of the recurrent nova T CrB. We find that the surface lithium abundance in T CrB is signifcantly enhanced compared to field M…
Infrared spectroscopy of low-mass X-ray binaries II
R. M. Bandyopadhyay, T. Shahbaz, P. A. Charles +1
Using CGS4 on UKIRT, we have obtained 2.00-2.45 micron infrared spectra of a number of low-mass X-ray binaries including Sco X-1, Sco X-2, and GX13+1. Sco X-1 shows emission lines…
On the orbital period distribution of cataclysmic variables
Coel Hellier, T. Naylor
Using the latest compilation of cataclysmic variable orbital periods by Ritter & Kolb we argue against Verbunt's conclusion that the period gap is not significant for nova-like var…
High-Speed Optical Spectroscopy of a Cataclysmic Variable Wind: BZ Camelopardalis
F. A. Ringwald, T. Naylor
BZ Cam is the first cataclysmic variable star with an accretion disk wind evident in its optical spectrum. The wind was found by Thorstensen, who discovered intermittent P Cygni pr…
The Status of Nova Orionis 1667
F. A. Ringwald, T. Naylor
Images taken in 1.3" seeing show that a claimed hibernating nova, Candidate 5 shown in a Sky & Telescope Newswire item, is found to be a visual binary, with a 1.1" separation betwe…
The massive white dwarf in the recurrent nova T CrB
T. Shahbaz, M. Somers, B. Yudin +1
We have obtained I, J, H and K band light curves of the recurrent nova T CrB. We find that we can only fit the band light curve with a Roche-lobe filling secondary star and a d…