223 citations · 1.6k across the 38 of their papers we have counts for
14 papers · 1 filter
Binarity and multiperiodicity in high-amplitude delta Scuti stars
A. Derekas, L. L. Kiss, T. R. Bedding +10
We have carried out a photometric and spectroscopic survey of bright high-amplitude delta Scuti (HADS) stars. The aim was to detect binarity and multiperiodicity (or both) in order…
AAOmega radial velocities rule out current membership of the planetary nebula NGC 2438 in the open cluster M46
L. L. Kiss, Gy. M. Szabo, Z. Balog +2
We present new radial velocity measurements of 586 stars in a one-degree field centered on the open cluster M46, and the planetary nebula NGC 2438 located within a nuclear radius o…
The University of New South Wales Extrasolar Planet Search: a catalogue of variable stars from fields observed 2004--2007
J. L. Christiansen, A. Derekas, L. L. Kiss +7
We present a new catalogue of variable stars compiled from data taken for the University of New South Wales Extrasolar Planet Search. From 2004 October to 2007 May, 25 target field…
High and low states of the system AM Herculis
K. Wu, L. L. Kiss
Context: We investigate the distribution of optically high and low states of the system AM Herculis (AM Her). Aims: We determine the state duty cycles, and their relationships with…
Physical parameters and multiplicity of five southern close eclipsing binaries
T. Szalai, L. L. Kiss, Sz. Meszaros +2
Aims: Detect tertiary components of close binaries from spectroscopy and light curve modelling; investigate light-travel time effect and the possibility of magnetic activity cycles…
Defining the instability strip of pulsating post-AGB binary stars from ASAS and NSVS photometry
L. L. Kiss, A. Derekas, Gy. M. Szabo +2
We analyse public domain time-series photometric observations of 30 known and candidate binary post-AGB stars for measuring pulsation and orbital periods. We derive periodicities f…
Variability in red supergiant stars: pulsations, long secondary periods and convection noise
L. L. Kiss, Gy. M. Szabo, T. R. Bedding
We study the brightness variations of galactic red supergiant stars using long-term visual light curves collected by the American Association of Variable Star Observers (AAVSO) ove…
Red giant variables: OGLE--II and MACHO
L. L. Kiss, P. Lah
We review the recent impact of microlensing projects on our understanding of pulsating red giant stars. Discussed are red giant stars' pulsation properties (period--luminosity rela…
New clues on outburst mechanisms and improved spectroscopic elements of the black-hole binary V4641 Sagittarii
C. Lindstrom, J. Griffin, L. L. Kiss +4
We present spectroscopic observations of the black-hole binary V4641 Sagittarii, obtained between 4th July 2004 and 28th March 2005, which cover the minor outburst of the star in e…
Red variables in the OGLE-II data base -- III. Constraints on the three-dimensional structures of the LMC and SMC
P. Lah, L. L. Kiss, T. R. Bedding
We present an analysis of the 3-D structure of the Magellanic Clouds, using period-luminosity (P-L) relations of pulsating red giants in the OGLE-II sample. By interpreting deviati…
Photometric biases due to stellar blending: implications for measuring distances, constraining binarity and detecting exoplanetary transits
L. L. Kiss, T. R. Bedding
We investigate blending, binarity and photometric biases in crowded-field CCD imaging. For this, we consider random blend losses, which correspond to the total number of stars left…
Red variables in the OGLE-II database. I. Pulsations and period-luminosity relations below the tip of the Red Giant Branch of the LMC
L. L. Kiss, T. Bedding
We present period-luminosity relations for more than 23,000 red giants in the Large Magellanic Cloud observed by the OGLE-II microlensing project. The OGLE period values were combi…
Period-doubling events in the light curve of R Cygni: evidence for chaotic behaviour
L. L. Kiss, K. Szatmary
A detailed analysis of the century long visual light curve of the long-period Mira star R Cygni is presented and discussed. The data were collected from the publicly available data…
CCD photometry and new models of 5 minor planets
L. L. Kiss, Gy. Szabo, K. Sarneczky
We present new R filtered CCD observations of 5 faint and moderately faint asteroids carried out between October, 1998 and January, 1999. The achieved accuracy is between 0.01-0.03…