Publications (17)
MOST Detects g-Modes in the Late-Type be Star beta CMi (B8Ve)
H. Saio, C. Cameron, R. Kuschnig +10
The Microvariability and Oscillations of stars (MOST) satellite has detected low-amplitude light variations (1 mmag) in the Be star CMi (B8Ve). The observations laste…
V473 Lyr, a modulated, period-doubled Cepheid, and U TrA, a double-mode Cepheid observed by MOST
L. Molnár, A. Derekas, R. Szabó +36
Space-based photometric measurements first revealed low-amplitude irregularities in the pulsations of Cepheid stars, but their origins and how commonly they occur remain uncertain.…
Stellar modelling of Spica, a high-mass spectroscopic binary with a beta Cep variable primary component
A. Tkachenko, J. M. Matthews, C. Aerts +16
Binary stars provide a valuable test of stellar structure and evolution, because the masses of the individual stellar components can be derived with high accuracy and in a model-in…
WR 110: A Single Wolf-Rayet Star With Corotating Interaction Regions In Its Wind?
A. -N. Chené, A. F. J. Moffat, C. Cameron +13
A 30-day contiguous photometric run with the MOST satellite on the WN5-6b star WR 110 (HD 165688) reveals a fundamental periodicity of P = 4.08 +/- 0.55 days along with a number of…
Subtle flickering in Cepheids
N. R. Evans, R. Szabo, L. Szabados +5
Fundamental mode classical Cepheids have light curves which repeat accurately enough that we can watch them evolve (change period). The new level of accuracy and quantity of data w…
Physical parameters and 0.2% parallax of the detached eclipsing binary V923 Scorpii
T. Pribulla, A. Mérand, P. Kervella +10
V923 Sco is a bright ( = 5.91), nearby ( = 15.460.40 mas) southern eclipsing binary. Because both components are slow rotators, the minimum masses of the components are…
Oscillating red giants in the CoRoT exo-field: Asteroseismic mass and radius determination
T. Kallinger, W. W. Weiss, C. Barban +10
Context. Observations and analysis of solar-type oscillations in red-giant stars is an emerging aspect of asteroseismic analysis with a number of open questions yet to be explored.…
MOST detects SPBe pulsations in HD 127756 & HD 217543: Asteroseismic rotation rates independent of vsini
C. Cameron, H. Saio, R. Kuschnig +7
The MOST (Microvariability and Oscillations of Stars) satellite has discovered SPBe (Slowly Pulsating Be) oscillations in the stars HD 127756 (B1/B2 Vne) and HD 217543 (B3 Vpe). Fo…
Echography of young stars reveals their evolution
K. Zwintz, L. Fossati, T. Ryabchikova +17
We demonstrate that a seismic analysis of stars in their earliest evolutionary phases is a powerful method to identify young stars and distinguish their evolutionary states. The ea…
Photometric variability of TW~Hya from seconds to years as seen from space and the ground in 2013-2017
M. Siwak, W. Ogloza, A. F. J. Moffat +9
This is the final photometric study of TW Hya based on new MOST satellite observations. During 2014 and 2017 the light curves showed stable 3.75 and 3.69 d quasi-periodic oscillati…
MOST Photometry of the roAp Star HD 134214
C. Cameron, J. M. Matthews, J. F. Rowe +7
We present 10.27 of photometry of the roAp star HD 134214 obtained by the MOST satellite. The star is shown to be monoperiodic and oscillating at a frequency of 2948.97$…
Observations of Cepheids with the MOST satellite: Contrast between Pulsation Modes
N. R. Evans, R. Szabó, A. Derekas +10
The quantity and quality of satellite photometric data strings is revealing details in Cepheid variation at very low levels. Specifically, we observed a Cepheid pulsating in the fu…
Whole Earth Telescope Observations of the subdwarf B star KPD 1930+2752: A rich, short period pulsator in a close binary
M. D. Reed, S. L. Harms, S. Poindexter +58
KPD 1930+2752 is a short-period pulsating subdwarf B (sdB) star. It is also an ellipsoidal variable with a known binary period just over two hours. The companion is most likely a w…
The MOST view of Cepheids
L. Molnár, A. Derekas, R. Szabó +6
The MOST space telescope observed four Cepheid variables so far, all of different subtypes. Here we summarize the results obtained and the possible ways to continue to study these…
HD 114839 - An Am star showing both delta Scuti and gamma Dor pulsations discovered through MOST photometry
H. King, J. M. Matthews, J. F. Rowe +8
Using MOST (Microvariability and Oscillations of STars) satellite guide star photometry, we have discovered a metallic A star showing hybrid p- and g-mode pulsations. HD 114839 was…
Discovery of hybrid Dor and Sct pulsations in BD+18 4914 through MOST spacebased photometry
J. F. Rowe, J. M. Matthews, C. Cameron +9
We present a total of 57 days of contiguous, high-cadence photometry (14 days in 2004 and 43 in 2005) of the star BD+18 4914 obtained with the MOST satellite. We detect 16 frequenc…
Most Detects G- and P-Modes in the B Supergiant HD 163899 (B2Ib/II)
H. Saio, R. Kuschnig, A. Gautschy +8
The {\it Microvariability and Oscillations of Stars (MOST)} satellite observed the B supergiant HD 163899 (B2 Ib/II) for 37 days as a guide star and detected 48 frequencies $\la$ 2…