M. Paparó
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View article: Amplitude and frequency variability of the pulsating DB white dwarf stars KUV 05134+2605 and PG 1654+160 observed with the Whole Earth Telescope
Amplitude and frequency variability of the pulsating DB white dwarf stars KUV 05134+2605 and PG 1654+160 observed with the Whole Earth Telescope Open
We have acquired new time series photometry of the two pulsating DB white dwarf stars KUV 05134+2605 and PG 1654+160 with the Whole Earth Telescope. Additional single-site photometry is also presented. We use all these data plus all availa…
View article: The EXOTIME project: signals in the O–C diagrams of the rapidly pulsating subdwarfs DW Lyn, V1636 Ori, QQ Vir, and V541 Hya
The EXOTIME project: signals in the O–C diagrams of the rapidly pulsating subdwarfs DW Lyn, V1636 Ori, QQ Vir, and V541 Hya Open
Aims. We aim to investigate variations in the arrival time of coherent stellar pulsations due to the light-travel time effect to test for the presence of sub-stellar companions. Those companions are the key to one possible formation scenar…
View article: The Delta Scuti star 38 Eri from the ground and from space
The Delta Scuti star 38 Eri from the ground and from space Open
MESA inlists associated with The Delta Scuti star 38 Eri from the ground and from space
View article: The Delta Scuti star 38 Eri from the ground and from space
The Delta Scuti star 38 Eri from the ground and from space Open
MESA inlists associated with The Delta Scuti star 38 Eri from the ground and from space
View article: Wandering near the red edge: photometric observations of three cool ZZ Ceti stars
Wandering near the red edge: photometric observations of three cool ZZ Ceti stars Open
We summarize our findings on three cool ZZ Ceti type pulsating white dwarfs. We determined eight independent modes in HS 0733+4119, of which seven are new findings. For GD 154, we detected two new eigenmodes, and the recurrence of the puls…
View article: The Delta Scuti star 38 Eri from the ground and from space
The Delta Scuti star 38 Eri from the ground and from space Open
We present and discuss the pulsational characteristics of the Delta Scuti star 38 Eri from photometric data obtained at two widely spaced epochs, partly from the ground (1998) and partly from space (MOST, 2011). We found 18 frequencies res…
View article: The sdB pulsating star V391 Peg and its putative giant planet revisited after 13 years of time-series photometricdata
The sdB pulsating star V391 Peg and its putative giant planet revisited after 13 years of time-series photometricdata Open
V391 Peg (alias HS 2201+2610) is a subdwarf B (sdB) pulsating star that shows both p - and g -modes. By studying the arrival times of the p -mode maxima and minima through the O–C method, in a previous article the presence of a planet was …
View article: Multi-site, multi-colour and space photometry of a southern <i>δ</i> Scuti star, 38 Eri
Multi-site, multi-colour and space photometry of a southern <i>δ</i> Scuti star, 38 Eri Open
38 Eri is a δ Scuti star in the shell hydrogen burning stage of evolution, with a 0.04 mag peak-to-peak amplitude and a very complex light variation. It was discovered in 1971. In the subsequent investigation the star always showed a diffe…
View article: G 207-9 and LP 133-144: light-curve analysis and asteroseismology of two ZZ Ceti stars
G 207-9 and LP 133-144: light-curve analysis and asteroseismology of two ZZ Ceti stars Open
G 207-9 and LP 133-144 are two rarely observed ZZ Ceti stars located in the middle and close to the blue edge of the ZZ Ceti instability domain, respectively. We aimed to observe them at least during one observing season at Konkoly Observa…
View article: How to separate the low amplitude delta Scuti variation from the instrumental ones in CoRoT data?
How to separate the low amplitude delta Scuti variation from the instrumental ones in CoRoT data? Open
Rich regular frequency patterns were found in the Fourier spectra of low-amplitude delta Scuti stars observed by CoRoT satellite (see Paparó et al. 2016a,b). The CoRoT observations are, however, influenced by the disturbing effect of the S…
View article: The Pulsation Modes Of The Pre-White Dwarf PG 1159-035
The Pulsation Modes Of The Pre-White Dwarf PG 1159-035 Open
Context. PG 1159-035, a pre-white dwarf with T-eff similar or equal to 140000 K, is the prototype of both two classes: the PG 1159 spectroscopic class and the DOV pulsating class. Previous studies of PG 1159-035 photometric data obtained w…
View article: The 2003–2004 multisite photometric campaign for the β Cephei and eclipsing star 16 (EN) Lacertae with an appendix on 2 Andromedae, the variable comparison star
The 2003–2004 multisite photometric campaign for the β Cephei and eclipsing star 16 (EN) Lacertae with an appendix on 2 Andromedae, the variable comparison star Open
A multisite photometric campaign for the β Cephei and eclipsing variable 16 Lacertae is reported. 749 h of high-quality differential photoelectric Strömgren, Johnson and Geneva time series photometry were obtained with 10 telescopes during…
View article: How to separate the low amplitude δ Scuti variation from the instrumental ones in CoRoT data?
How to separate the low amplitude δ Scuti variation from the instrumental ones in CoRoT data? Open
Rich regular frequency patterns were found in the Fourier spectra of low-amplitude δ Scuti stars observed by CoRoT satellite (see Paparó et al. in prep.). The CoRoT observations are, however, influenced by the disturbing effect of the Sout…
View article: Amplitude Modulation in the ZZ Ceti Star GD 244
Amplitude Modulation in the ZZ Ceti Star GD 244 Open
Previous studies of GD 244 revealed seven pulsation frequencies (two doublets and three single periods) in the light variations of the star. The data obtained at McDonald Observatory between 2003 and 2006, and our additional measurements i…
View article: Amplitude Modulation in the ZZ Ceti Star GD 244
Amplitude Modulation in the ZZ Ceti Star GD 244 Open
Previous studies of GD 244 revealed seven pulsation frequencies (two doublets and three single periods) in the light variations of the star. The data obtained at McDonald Observatory between 2003 and 2006, and our additional measurements i…