Search Results - "KURTZ, D. W"

Suppressed phase variations in a high amplitude rapidly oscillating Ap star pulsating in a distorted quadrupole mode by Holdsworth, Daniel L, Saio, H, Bowman, D M, Kurtz, D W, Sefako, R R, Joyce, M, Lambert, T, Smalley, B

“…Abstract We present the results of a multisite photometric observing campaign on the rapidly oscillating Ap (roAp) star 2MASS 16400299-0737293 (J1640;…”
Get full text

Does Kepler unveil the mystery of the Blazhko effect? First detection of period doubling in Kepler Blazhko RR Lyrae stars by Szabó, R., Kolláth, Z., Molnár, L., Kolenberg, K., Kurtz, D. W., Bryson, S. T., Benkő, J. M., Christensen-Dalsgaard, J., Kjeldsen, H., Borucki, W. J., Koch, D., Twicken, J. D., Chadid, M., Criscienzo, M. Di, Jeon, Y-B., Moskalik, P., Nemec, J. M., Nuspl, J.

“…The first detection of the period doubling phenomenon is reported in the Kepler RR Lyrae stars RR Lyr, V808 Cyg and V355 Lyr. Interestingly, all these…”
Get full text

The Surface Composition of Six Newly Discovered Chemically Peculiar Stars. Comparison to the HgMn Stars mu Lep and beta Scl and the Superficially Normal B Star nu Cap by Monier, Richard, Niemczura, E., Kurtz, D. W., Rappaport, S., Bowman, D. M., Murphy, Simon J., Lebreton, Yveline, Stuik, Remko, Deal, Morgan, Merle, Thibault, Kılıçoğlu, T., Gebran, M., Le Ster, Ewen

“…We report on a detailed abundance study of six bright, mostly southern, slowly rotating late B-stars: HD 1279 (B8III), HD 99803 (B9V), HD 123445 (B9V), HD…”
Get full text

K2 observations of the rapidly oscillating Ap star 33 Lib (HD 137949): new frequencies and unique non-linear interactions by Holdsworth, Daniel L, Cunha, M S, Shibahashi, H, Kurtz, D W, Bowman, D M

Get full text

Whole Earth Telescope discovery of a strongly distorted quadrupole pulsation in the largest amplitude rapidly oscillating Ap star by Holdsworth, Daniel L., Kurtz, D. W., Saio, H., Provencal, J. L., Letarte, B., Sefako, R. R., Petit, V., Smalley, B., Thomsen, H., Fletcher, C. L.

“…Abstract We present a new analysis of the rapidly oscillating Ap (roAp) star, 2MASS J19400781 − 4420093 (J1940; V = 13.1). The star was discovered using…”
Get full text

Kepler observations of the beaming binary KPD 1946+4340 by Bloemen, S., Marsh, T. R., Østensen, R. H., Charpinet, S., Fontaine, G., Degroote, P., Heber, U., Kawaler, S. D., Aerts, C., Green, E. M., Telting, J., Brassard, P., Gänsicke, B. T., Handler, G., Kurtz, D. W., Silvotti, R., Van Grootel, V., Lindberg, J. E., Pursimo, T., Wilson, P. A., Gilliland, R. L., Kjeldsen, H., Christensen-Dalsgaard, J., Borucki, W. J., Koch, D., Jenkins, J. M., Klaus, T. C.

“…The Kepler Mission has acquired 33.5 d of continuous 1-min photometry of KPD 1946+4340, a short-period binary system that consists of a subdwarf B star (sdB)…”
Get full text

Fourier analysis of non-Blazhko ab-type RR Lyrae stars observed with the Kepler space telescope by Nemec, J. M., Smolec, R., Benkő, J. M., Moskalik, P., Kolenberg, K., Szabó, R., Kurtz, D. W., Bryson, S., Guggenberger, E., Chadid, M., Jeon, Y.-B., Kunder, A., Layden, A. C., Kinemuchi, K., Kiss, L. L., Poretti, E., Christensen-Dalsgaard, J., Kjeldsen, H., Caldwell, D., Ripepi, V., Derekas, A., Nuspl, J., Mullally, F., Thompson, S. E., Borucki, W. J.

“…Nineteen of the ∼40 RR Lyr stars in the Kepler field have been identified as candidate non-Blazhko (or unmodulated) stars. In this paper we present the results…”
Get full text

Asteroseismology of KIC 11754974: a high-amplitude SX Phe pulsator in a 343-d binary system by Murphy, S. J., Pigulski, A., Kurtz, D. W., Suárez, J. C., Handler, G., Balona, L. A., Smalley, B., Uytterhoeven, K., Szabó, R., Thygesen, A. O., Elkin, V., Breger, M., Grigahcène, A., Guzik, J. A., Nemec, J. M., Southworth, J.

“…The candidate SX Phe star KIC 11754974 shows a remarkably high number of combination frequencies in the Fourier amplitude spectrum: 123 of the 166 frequencies…”
Get full text

First Kepler results on compact pulsators - VI. Targets in the final half of the survey phase by Østensen, R. H., Silvotti, R., Charpinet, S., Oreiro, R., Bloemen, S., Baran, A. S., Reed, M. D., Kawaler, S. D., Telting, J. H., Green, E. M., O'Toole, S. J., Aerts, C., Gänsicke, B. T., Marsh, T. R., Breedt, E., Heber, U., Koester, D., Quint, A. C., Kurtz, D. W., Rodríguez-López, C., Vučković, M., Ottosen, T. A., Frimann, S., Somero, A., Wilson, P. A., Thygesen, A. O., Lindberg, J. E., Kjeldsen, H., Christensen-Dalsgaard, J., Allen, C., McCauliff, S., Middour, C. K.

“…We present results from the final 6 months of a survey to search for pulsations in white dwarfs (WDs) and hot subdwarf stars with the Kepler spacecraft…”
Get full text

The first evidence for multiple pulsation axes: a new rapidly oscillating Ap star in the Kepler field, KIC10195926 by Kurtz, D. W, Cunha, M. S, Saio, H, Bigot, L, Balona, L. A, Elkin, V. G, Shibahashi, H, Brandão, I. M, Uytterhoeven, K, Frandsen, S, Frimann, S, Hatzes, A, Lueftinger, T, Gruberbauer, M, Kjeldsen, H, Christensen-Dalsgaard, J, Kawaler, S. D

“…We have discovered a new rapidly oscillating Ap (roAp) star among the Kepler mission target stars, KIC10195926. This star shows two pulsation modes with…”
Get full text

Rotation and oblique pulsation in Kepler observations of the roAp star KIC 10483436 by Balona, L. A., Cunha, M. S., Gruberbauer, M., Kurtz, D. W., Saio, H., White, T. R., Christensen-Dalsgaard, J., Kjeldsen, H., Christiansen, J. L., Hall, J. R., Seader, S. E.

“…Photometry of KIC 10483436 was obtained continuously with 1-min exposures over a 27-d period from the Kepler satellite. The light curve shows rotational…”
Get full text

The excitation of solar-like oscillations in a δ Sct star by efficient envelope convection by Antoci, V., Handler, G., Campante, T. L., Thygesen, A. O., Moya, A., Kallinger, T., Stello, D., Grigahcène, A., Kjeldsen, H., Bedding, T. R., Lüftinger, T., Christensen-Dalsgaard, J., Catanzaro, G., Frasca, A., De Cat, P., Uytterhoeven, K., Bruntt, H., Houdek, G., Kurtz, D. W., Lenz, P., Kaiser, A., Van Cleve, J., Allen, C., Clarke, B. D.

“…Delta Scuti (δ Sct) 1 stars are opacity-driven pulsators with masses of 1.5–2.5 M ⊙ , their pulsations resulting from the varying ionization of helium. In less…”
Get full text

Seismic evidence for non-synchronization in two close sdb+dM binaries from Kepler photometry by Pablo, Herbert, Kawaler, Steven D., Reed, M. D., Bloemen, S., Charpinet, S., Hu, H., Telting, J., Østensen, R. H., Baran, A. S., Green, E. M., Hermes, J. J., Barclay, T., O'Toole, S. J., Mullally, Fergal, Kurtz, D. W., Christensen-Dalsgaard, J., Caldwell, Douglas A., Christiansen, Jessie L., Kinemuchi, K.

“…We report on extended photometry of two pulsating subdwarf B (sdB) stars in close binaries. For both cases, we use rotational splitting of the pulsation…”
Get full text

Kepler photometry of the prototypical Blazhko star RR Lyr: an old friend seen in a new light by Kolenberg, K., Bryson, S., Szabó, R., Kurtz, D. W., Smolec, R., Nemec, J. M., Guggenberger, E., Moskalik, P., Benkő, J. M., Chadid, M., Jeon, Y.-B., Kiss, L. L., Kopacki, G., Nuspl, J., Still, M., Christensen-Dalsgaard, J., Kjeldsen, H., Borucki, W. J., Caldwell, D. A., Jenkins, J. M., Koch, D.

“…We present our analysis of the long-cadence Kepler data for the well-studied Blazhko star RR Lyr, gathered during the first two quarters of the satellite's…”
Get full text

Kepler observations of rapidly oscillating Ap, δ Scuti and γ Doradus pulsations in Ap stars by Balona, L. A., Cunha, M. S., Kurtz, D. W., Brandão, I. M., Gruberbauer, M., Saio, H., Østensen, R., Elkin, V. G., Borucki, W. J., Christensen-Dalsgaard, J., Kjeldsen, H., Koch, D. G., Bryson, S. T.

“…Observations of the A5p star KIC 8677585 obtained during the Kepler 10-d commissioning run with 1-min time resolution show that it is a rapidly oscillating Ap…”
Get full text

Discovery of 17 new sharp-lined Ap stars with magnetically resolved lines by Freyhammer, L. M., Elkin, V. G., Kurtz, D. W., Mathys, G., Martinez, P.

“…Chemically peculiar A stars (Ap) are extreme examples of the interaction of atomic element diffusion processes with magnetic fields in stellar atmospheres. The…”
Get full text

Magnetic stars from a FEROS cool Ap star survey by Elkin, V. G., Kurtz, D. W., Nitschelm, C.

“…New magnetic Ap stars with split Zeeman components are presented. These stars were discovered from observations with the Fibre-fed Extended Range Optical…”
Get full text

The discovery of 8.0-min radial velocity variations in the strongly magnetic cool Ap star HD 154708, a new roAp star by Kurtz, D. W., Elkin, V. G., Cunha, M. S., Mathys, G., Hubrig, S., Wolff, B., Savanov, I.

“…HD 154708 has an extraordinarily strong magnetic field of 24.5 kG. Using 2.5 h of high time resolution Ultraviolet and Visual Echelle Spectrograph (UVES)…”
Get full text

First Kepler results on compact pulsators – V. Slowly pulsating subdwarf B stars in short-period binaries by Kawaler, S. D., Reed, M. D., Østensen, R. H., Bloemen, S., Kurtz, D. W., Quint, A. C., Silvotti, R., Baran, A. S., Green, E. M., Charpinet, S., Telting, J., Aerts, C., Handler, G., Kjeldsen, H., Christensen-Dalsgaard, J., Borucki, W. J., Koch, D. G.

“…The survey phase of the Kepler Mission includes a number of hot subdwarf B (sdB) stars to search for non-radial pulsations. We present our analysis of two sdB…”
Get full text

A 3D study of the photosphere of HD 99563 – I. Pulsation analysis by Freyhammer, L. M., Kurtz, D. W., Elkin, V. G., Mathys, G., Savanov, I., Zima, W., Shibahashi, H., Sekiguchi, K.

“…We have used high-speed spectroscopy of the rapidly oscillating Ap (roAp) star HD 99563 to study the pulsation amplitude and phase behaviour of elements in its…”
Get full text