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250 results on '"Chevreton M."'

51. The pulsations of PG 1351+489

Author

Redaelli, M., primary, Kepler, S. O., additional, Costa, J. E. S., additional, Winget, D. E., additional, Handler, G., additional, Castanheira, B. G., additional, Kanaan, A., additional, Fraga, L., additional, Henrique, P., additional, Giovannini, O., additional, Provencal, J. L., additional, Shipman, H. L., additional, Dalessio, J., additional, Thompson, S. E., additional, Mullally, F., additional, Brewer, M. M., additional, Childers, D., additional, Oksala, M. E., additional, Rosen, R., additional, Wood, M. A., additional, Reed, M. D., additional, Walter, B., additional, Strickland, W., additional, Chandler, D., additional, Watson, T. K., additional, Nather, R. E., additional, Montgomery, M. H., additional, Bischoff-Kim, A., additional, Hansen, C. J., additional, Nitta, A., additional, Kleinman, S. J., additional, Claver, C. F., additional, Brown, T. M., additional, Sullivan, D. J., additional, Kim, S.-L., additional, Chen, W.-P., additional, Yang, M., additional, Shih, C.-Y., additional, Zhang, X., additional, Jiang, X., additional, Fu, J. N., additional, Seetha, S., additional, Ashoka, B. N., additional, Marar, T. M. K., additional, Baliyan, K. S., additional, Vats, H. O., additional, Chernyshev, A. V., additional, Ibbetson, P., additional, Leibowitz, E., additional, Hemar, S., additional, Sergeev, A. V., additional, Andreev, M. V., additional, Janulis, R., additional, Meištas, E. G., additional, Moskalik, P., additional, Pajdosz, G., additional, Baran, A., additional, Winiarski, M., additional, Zola, S., additional, Ogloza, W., additional, Siwak, M., additional, Bognár, Zs., additional, Solheim, J.-E., additional, Sefako, R., additional, Buckley, D., additional, O'Donoghue, D., additional, Nagel, T., additional, Silvotti, R., additional, Bruni, I., additional, Fremy, J. R., additional, Vauclair, G., additional, Chevreton, M., additional, Dolez, N., additional, Pfeiffer, B., additional, Barstow, M. A., additional, Creevey, O. L., additional, Kawaler, S. D., additional, and Clemens, J. C., additional

Published
2011
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53. Whole Earth Telescope observations of the subdwarf B star KPD 1930+2752: a rich, short-period pulsator in a close binary

Author

Reed, M. D., primary, Harms, S. L., additional, Poindexter, S., additional, Zhou, A.-Y., additional, Eggen, J. R., additional, Morris, M. A., additional, Quint, A. C., additional, McDaniel, S., additional, Baran, A., additional, Dolez, N., additional, Kawaler, S. D., additional, Kurtz, D. W., additional, Moskalik, P., additional, Riddle, R., additional, Zola, S., additional, Østensen, R. H., additional, Solheim, J.-E., additional, Kepler, S. O., additional, Costa, A. F. M., additional, Provencal, J. L., additional, Mullally, F., additional, Winget, D. W., additional, Vuckovic, M., additional, Crowe, R., additional, Terry, D., additional, Avila, R., additional, Berkey, B., additional, Stewart, S., additional, Bodnarik, J., additional, Bolton, D., additional, Binder, P.-M., additional, Sekiguchi, K., additional, Sullivan, D. J., additional, Kim, S.-L., additional, Chen, W.-P., additional, Chen, C.-W., additional, Lin, H.-C., additional, Jian, X.-J., additional, Wu, H., additional, Gou, J.-P., additional, Liu, Z., additional, Leibowitz, E., additional, Lipkin, Y., additional, Akan, C., additional, Cakirli, O., additional, Janulis, R., additional, Pretorius, R., additional, Ogloza, W., additional, Stachowski, G., additional, Paparo, M., additional, Szabo, R., additional, Csubry, Z., additional, Zsuffa, D., additional, Silvotti, R., additional, Marinoni, S., additional, Bruni, I., additional, Vauclair, G., additional, Chevreton, M., additional, Matthews, J. M., additional, Cameron, C., additional, and Pablo, H., additional

Published
2011
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54. Constraining the Evolution of Zz Ceti

Author

1777676, Mukadam, Anjum S., Kepler, S. O., Nather, D. E., Kilic, M., Mullally, F., von Hippel, T., Kleinman, S. J., Nitta, A., Guzik, J. A., Bradley, P. A., Matthews, J., Sekiguchi, K., Sullivan, D. J., Sullivan, T., Shobbrook, R. R., Birch, P., Jiang, X. J., Xu, D. W., Joshi, S., Ashoka, B. N., Ibbetson, P., Leibowitz, E., Ofek, E. O., Meištas, E. G., Janulis, R., Ališauskas, R. D., Kalytis, R., Handler, G., Kilkenny, D., O'Donoghue, D., Kurtz, D. W., Müller, M., Moskalik, P., Ogloza, W., Zola, S., Krzesiński, J., Johnannessen, F., Gonzalez-Perez, J. M., Solheim, J. E., Silvotti, R., Bernabei, S., Vauclair, G., Dolez, N., Fu, J. N., Chevreton, M., Manteiga, M., Suárez, O., Ulla, A., Cunha, M. S., Metcalfe, T. S., Kanaan, A., Fraga, L., Costa, A. F. M., Giovannini, O., Fontaine, G., Bergeron, P., O'Brien, M. S., Sanwal, D., Wood, M. A., Ahrens, T. J., Silvestri, N., Klumpe, E. W., Kawaler, S. D., Riddle, R., Reed, M. D., Watson, T. K., 1777676, Mukadam, Anjum S., Kepler, S. O., Nather, D. E., Kilic, M., Mullally, F., von Hippel, T., Kleinman, S. J., Nitta, A., Guzik, J. A., Bradley, P. A., Matthews, J., Sekiguchi, K., Sullivan, D. J., Sullivan, T., Shobbrook, R. R., Birch, P., Jiang, X. J., Xu, D. W., Joshi, S., Ashoka, B. N., Ibbetson, P., Leibowitz, E., Ofek, E. O., Meištas, E. G., Janulis, R., Ališauskas, R. D., Kalytis, R., Handler, G., Kilkenny, D., O'Donoghue, D., Kurtz, D. W., Müller, M., Moskalik, P., Ogloza, W., Zola, S., Krzesiński, J., Johnannessen, F., Gonzalez-Perez, J. M., Solheim, J. E., Silvotti, R., Bernabei, S., Vauclair, G., Dolez, N., Fu, J. N., Chevreton, M., Manteiga, M., Suárez, O., Ulla, A., Cunha, M. S., Metcalfe, T. S., Kanaan, A., Fraga, L., Costa, A. F. M., Giovannini, O., Fontaine, G., Bergeron, P., O'Brien, M. S., Sanwal, D., Wood, M. A., Ahrens, T. J., Silvestri, N., Klumpe, E. W., Kawaler, S. D., Riddle, R., Reed, M. D., and Watson, T. K.

Published
2003

55. Constraining the Evolution of ZZ Ceti

Author

Mukadam, Anjum, Kepler, S O, Winget, D E, Nather, R E, Kilic, M, Mullally, F, von Hippel, Ted, Kleinman, S, Nitta, A, Guzik, J A, Bradley, P A, Matthews, J M, Sekiguchi, K, Sullivan, D J, Sullivan, T, Shobbrook, R, Birch, P V, Jiang, X, Xu, D W, Joshi, S, Ashoka, B N, Ibbetson, P, Leibowitz, E, Ofek, Eran O, Meistas, E, Janulis, R, Alisauskas, D, Kalytis, R, Handler, G, Kilkenny, D, O'Donoghue, D, Kurtz, D W, Muller, M, Moskalik, P, Ogloza, W, Zola, S, Krzesinski, J, Johannessen, F, Gonzalez-Perez, J, Solheim, Jesper, Silvotti, R, Bernabei, S, Vauclair, G, Dolez, N, Fu, J, Chevreton, M, Mantiega, M, Suarez, O, Ulla, A, Cunha, M S, Metcalfe, T S, Kanaan, A, Fraga, L, Costa, A F M, Giovannini, O, Fontaine, G, Bergeron, P, O'Brien, M S, Sanwal, D, Wood, M A, Ahrens, T J, Silvestri, Nicole, Klumpe, E W, Kawaler, S D, Riddle, R L, Reed, M D, Watson, T K, Mukadam, Anjum, Kepler, S O, Winget, D E, Nather, R E, Kilic, M, Mullally, F, von Hippel, Ted, Kleinman, S, Nitta, A, Guzik, J A, Bradley, P A, Matthews, J M, Sekiguchi, K, Sullivan, D J, Sullivan, T, Shobbrook, R, Birch, P V, Jiang, X, Xu, D W, Joshi, S, Ashoka, B N, Ibbetson, P, Leibowitz, E, Ofek, Eran O, Meistas, E, Janulis, R, Alisauskas, D, Kalytis, R, Handler, G, Kilkenny, D, O'Donoghue, D, Kurtz, D W, Muller, M, Moskalik, P, Ogloza, W, Zola, S, Krzesinski, J, Johannessen, F, Gonzalez-Perez, J, Solheim, Jesper, Silvotti, R, Bernabei, S, Vauclair, G, Dolez, N, Fu, J, Chevreton, M, Mantiega, M, Suarez, O, Ulla, A, Cunha, M S, Metcalfe, T S, Kanaan, A, Fraga, L, Costa, A F M, Giovannini, O, Fontaine, G, Bergeron, P, O'Brien, M S, Sanwal, D, Wood, M A, Ahrens, T J, Silvestri, Nicole, Klumpe, E W, Kawaler, S D, Riddle, R L, Reed, M D, and Watson, T K

Abstract

We report our analysis of the stability of pulsation periods in the DAV star (pulsating hydrogen atmosphere white dwarf) ZZ Ceti, also called R548. On the basis of observations that span 31 years, we conclude that the period 213. 13 s observed in ZZ Ceti

Published
2003

56. Amplitude and Frequency Variability of the Pulsating DB White Dwarf Stars KUV 05134+2605 and PG 1654+160 Observed with the Whole Earth Telescope

Author

Handler, G, O'Donoghue, D, Muller, M, Solheim, Jesper, Gonzalez-Perez, J, Johannessen, F, Paparo, M, Szeidl, B, Viraghalmy, G, Silvotti, R, Vauclair, G, Dolez, N, Pallier, E, Chevreton, M, Kurtz, D W, Bromage, G., Cunha, M S, Ostensen, R, Fraga, L, Kanaan, A, Amorim, A., Giovannini, O, Kepler, S O, da Costa, A, Anderson, R., Wood, M A, Silvestri, Nicole, Klumpe, E W, Carlton, R., Miller, R, McFarland, J, Grauer, A., Kawaler, S D, Riddle, R L, Reed, M D, Nather, R E, Winget, D E, Hill, J., Metcalfe, T S, Mukadam, Anjum, Kilic, M, Watson, T K, Kleinman, S, Nitta, A, Guzik, J A, Bradley, P A, Sekiguchi, K, Sullivan, D J, Sullivan, T, Shobbrook, R, Jiang, X, Birch, P V, Ashoka, B N, Seetha, S, Girish, V, Joshi, S, Dorokhova, T., Dorokhov, N., Akan, M., Meistas, E, Janulis, R, Kalytis, R, Alisauskas, D, Anguma, S., Kalebwe, P C, Moskalik, P, Ogloza, W, Stachowski, G, Pajdosz, G, Zola, S, Handler, G, O'Donoghue, D, Muller, M, Solheim, Jesper, Gonzalez-Perez, J, Johannessen, F, Paparo, M, Szeidl, B, Viraghalmy, G, Silvotti, R, Vauclair, G, Dolez, N, Pallier, E, Chevreton, M, Kurtz, D W, Bromage, G., Cunha, M S, Ostensen, R, Fraga, L, Kanaan, A, Amorim, A., Giovannini, O, Kepler, S O, da Costa, A, Anderson, R., Wood, M A, Silvestri, Nicole, Klumpe, E W, Carlton, R., Miller, R, McFarland, J, Grauer, A., Kawaler, S D, Riddle, R L, Reed, M D, Nather, R E, Winget, D E, Hill, J., Metcalfe, T S, Mukadam, Anjum, Kilic, M, Watson, T K, Kleinman, S, Nitta, A, Guzik, J A, Bradley, P A, Sekiguchi, K, Sullivan, D J, Sullivan, T, Shobbrook, R, Jiang, X, Birch, P V, Ashoka, B N, Seetha, S, Girish, V, Joshi, S, Dorokhova, T., Dorokhov, N., Akan, M., Meistas, E, Janulis, R, Kalytis, R, Alisauskas, D, Anguma, S., Kalebwe, P C, Moskalik, P, Ogloza, W, Stachowski, G, Pajdosz, G, and Zola, S

Abstract

We have acquired new time series photometry of the two pulsating DB white dwarf stars KUV 05134+2605 and PG1654+160 with the Whole Earth Telescope. Additional single-site photometry is also presented. We use all these data plus all available archival measurements to study the temporal behaviour of the pulsational amplitudes and frequencies of these stars for the first time. We demonstrate that both KUV 05134+2605 and PG 1654+160 pulsate in many modes, the amplitudes of which are variable in time; some frequency variability of PG 1654+160 is also indicated. Beating of multiple pulsation modes cannot explain our observations; the amplitude variability must therefore be intrinsic. We cannot find stable modes to be used for determinations of the evolutionary period changes of the stars. Some of the modes of PG 1654+160 appear at the same periods whenever detected. The mean spacing of these periods (≈40 s) suggests that they are probably caused by non-radial gravity-mode pulsations of spherical degree 1 = 1. If so, PG 1654+160 has a mass around 0.6 M⊙. The time-scales of the amplitude variability of both stars (down to two weeks) are consistent with theoretical predictions of resonant mode coupling, a conclusion which might however be affected by the temporal distribution of our data.

Published
2003

57. Observational limits on companions to g29-38

Author

Kleinman, S. J., Nather, R. E., Winget, D. E., Clemens, J. C., Bradley, P. A., Kanaan, A., Provencal, J. L., Claver, C. F., Watson, T. K., Yanagida, K., Dixson, J. S., Wood, M. A., Sullivan, D. J., Meištas, E., Leibowitz, E. M., Moskalik, P., Zola, S., Pajdosz, G., Krzesinski, J., Solheim, J. -E, Bruvold, A., O Donoghue, D., Katz, M., Vauclair, G., Dolez, N., Chevreton, M., Barstow, M. A., Kepler, S. O., Giovannini, O., Hansen, C. J., and Steven Kawaler

Subjects
low-mass, brown dwarfs [Stars], general [Binaries], Anãs brancas, oscillations [Stars], White dwarfs, Fotometria estelar, individual (G29-38) [Stars], Estrelas binarias, Estrelas variaveis
Abstract

Recent interest in the variable (DAV) white dwarf G29-38 has been stirred by a tentative report of a radial velocity variation that may be due to an unseen companion. Earlier evidence for a brown dwarf in the system has come from an observed infrared excess in the star's spectrum. For asteroseismological reasons, we have accumulated more than five seasons of high-speed photometric data on the star. By measuring the phase of an isolated, stable frequency in the power spectrum, we show the measured variation is not due (at least in its entirety) to an orbital companion. Because any orbital radial velocity variation must result in a systematic phase variation, the data we present can be used to place stringent limits on the types of companions the system may contain.

Published
1994

59. The ZZ Ceti star HS 0507+0434B revisited

Author

Fu, J.-N., primary, Dolez, N., additional, Vauclair, G., additional, Machado, L. Fox, additional, Kim, S.-L., additional, Li, C., additional, Alvarez, M., additional, Su, J., additional, Chevreton, M., additional, Michel, R., additional, Yang, X. H., additional, Li, Y., additional, Zhang, Y. P., additional, Paparo, M., additional, Molnar, L., additional, Plachy, E., additional, Werner, Klaus, additional, and Rauch, T., additional

Published
2010
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60. 2006 WHOLE EARTH TELESCOPE OBSERVATIONS OF GD358: A NEW LOOK AT THE PROTOTYPE DBV

Author

Provencal, J. L., primary, Montgomery, M. H., additional, Kanaan, A., additional, Shipman, H. L., additional, Childers, D., additional, Baran, A., additional, Kepler, S. O., additional, Reed, M., additional, Zhou, A., additional, Eggen, J., additional, Watson, T. K., additional, Winget, D. E., additional, Thompson, S. E., additional, Riaz, B., additional, Nitta, A., additional, Kleinman, S. J., additional, Crowe, R., additional, Slivkoff, J., additional, Sherard, P., additional, Purves, N., additional, Binder, P., additional, Knight, R., additional, Kim, S. -L., additional, Chen, Wen-Ping, additional, Yang, M., additional, Lin, H. C., additional, Lin, C. C., additional, Chen, C. W., additional, Jiang, X. J., additional, Sergeev, A. V., additional, Mkrtichian, D., additional, Andreev, M., additional, Janulis, R., additional, Siwak, M., additional, Zola, S., additional, Koziel, D., additional, Stachowski, G., additional, Paparo, M., additional, Bognar, Zs., additional, Handler, G., additional, Lorenz, D., additional, Steininger, B., additional, Beck, P., additional, Nagel, T., additional, Kusterer, D., additional, Hoffman, A., additional, Reiff, E., additional, Kowalski, R., additional, Vauclair, G., additional, Charpinet, S., additional, Chevreton, M., additional, Solheim, J. E., additional, Pakstiene, E., additional, Fraga, L., additional, and Dalessio, J., additional

Published
2009
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61. Whole Earth Telescope observations of the hot helium atmosphere pulsating white dwarf EC 20058−5234

Author

Sullivan, D. J., primary, Metcalfe, T. S., additional, O'Donoghue, D., additional, Winget, D. E., additional, Kilkenny, D., additional, van Wyk, F., additional, Kanaan, A., additional, Kepler, S. O., additional, Nitta, A., additional, Kawaler, S. D., additional, Montgomery, M. H., additional, Nather, R. E., additional, O'Brien, M. S., additional, Bischoff-Kim, A., additional, Wood, M., additional, Jiang, X. J., additional, Leibowitz, E. M., additional, Ibbetson, P., additional, Zola, S., additional, Krzesinski, J., additional, Pajdosz, G., additional, Vauclair, G., additional, Dolez, N., additional, and Chevreton, M., additional

Published
2008
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63. The pulsation modes of the pre-white dwarf PG 1159-035

Author

Costa, J. E. S., primary, Kepler, S. O., additional, Winget, D. E., additional, O'Brien, M. S., additional, Kawaler, S. D., additional, Costa, A. F. M., additional, Giovannini, O., additional, Kanaan, A., additional, Mukadam, A. S., additional, Mullally, F., additional, Nitta, A., additional, Provençal, J. L., additional, Shipman, H., additional, Wood, M. A., additional, Ahrens, T. J., additional, Grauer, A., additional, Kilic, M., additional, Bradley, P. A., additional, Sekiguchi, K., additional, Crowe, R., additional, Jiang, X. J., additional, Sullivan, D., additional, Sullivan, T., additional, Rosen, R., additional, Clemens, J. C., additional, Janulis, R., additional, O'Donoghue, D., additional, Ogloza, W., additional, Baran, A., additional, Silvotti, R., additional, Marinoni, S., additional, Vauclair, G., additional, Dolez, N., additional, Chevreton, M., additional, Dreizler, S., additional, Schuh, S., additional, Deetjen, J., additional, Nagel, T., additional, Solheim, J.-E., additional, Gonzalez Perez, J. M., additional, Ulla, A., additional, Barstow, M., additional, Burleigh, M., additional, Good, S., additional, Metcalfe, T. S., additional, Kim, S.-L., additional, Lee, H., additional, Sergeev, A., additional, Akan, M. C., additional, Çakırlı, Ö., additional, Paparo, M., additional, Viraghalmy, G., additional, Ashoka, B. N., additional, Handler, G., additional, Hürkal, Ö., additional, Johannessen, F., additional, Kleinman, S. J., additional, Kalytis, R., additional, Krzesinski, J., additional, Klumpe, E., additional, Larrison, J., additional, Lawrence, T., additional, Meištas, E., additional, Martinez, P., additional, Nather, R. E., additional, Fu, J.-N., additional, Pakštienė, E., additional, Romero-Colmenero, E., additional, Riddle, R., additional, Seetha, S., additional, Silvestri, N. M., additional, Vučković, M., additional, Warner, B., additional, Zola, S., additional, Althaus, L. G., additional, Córsico, A. H., additional, and Montgomery, M. H., additional

Published
2007
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64. Multisite Observations of δ Scuti Stars 7 Aql and 8 Aql (a New δ Scuti Variable): The Twelfth STEPHI Campaign in 2003

Author

Fox Machado, L., primary, Michel, E., additional, Pérez Hernández, F., additional, Peña, J. H., additional, Li, Z. P., additional, Chevreton, M., additional, Belmonte, J. A., additional, Álvarez, M., additional, Parrao, L., additional, Dupret, M.-A., additional, Pau, S., additional, Fernandez, A., additional, Michel, J. P., additional, Michel, R., additional, and Pani, A., additional

Published
2007
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65. Pulsational frequencies of the eclipsing δ Scuti star HD 172189. Results of the STEPHI XIII campaign

Author

Costa, J. E. S., primary, Michel, E., additional, Peña, J., additional, Creevey, O., additional, Li, Z. P., additional, Chevreton, M., additional, Belmonte, J. A., additional, Alvarez, M., additional, Fox Machado, L., additional, Parrao, L., additional, Pérez Hernéndez, F., additional, Fernández, A., additional, Fremy, J. R., additional, Pau, S., additional, and Alonso, R., additional

Published
2007
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66. Asteroseismology of the PG 1159 star PG 0122+200

Author

Fu, J.-N., primary, Vauclair, G., additional, Solheim, J.-E., additional, Chevreton, M., additional, Dolez, N., additional, O'Brien, M. S., additional, Kim, S.-L., additional, Park, B.-G., additional, Handler, G., additional, Medupe, R., additional, Wood, M., additional, Gonzalez Perez, J., additional, Hashimoto, O., additional, Kinugasa, K., additional, Taguchi, H., additional, Kambe, E., additional, Provencal, J., additional, Dreizler, S., additional, Schuh, S., additional, Leibowitz, E., additional, Lipkin, Y., additional, Zhang, X.-B., additional, Paparo, M., additional, Szeidl, B., additional, Virághalmy, G., additional, and Zsuffa, D., additional

Published
2007
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67. Exploration of the Kuiper Belt by High-Precision Photometric Stellar Occultations: First Results

Author

Roques, F., primary, Doressoundiram, A., additional, Dhillon, V., additional, Marsh, T., additional, Bickerton, S., additional, Kavelaars, J. J., additional, Moncuquet, M., additional, Auvergne, M., additional, Belskaya, I., additional, Chevreton, M., additional, Colas, F., additional, Fernandez, A., additional, Fitzsimmons, A., additional, Lecacheux, J., additional, Mousis, O., additional, Pau, S., additional, Peixinho, N., additional, and Tozzi, G. P., additional

Published
2006
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68. Whole Earth telescope observations of the ZZ Ceti star HL Tau 76

Author

Dolez, N., primary, Vauclair, G., additional, Kleinman, S. J., additional, Chevreton, M., additional, Fu, J. N., additional, Solheim, J.-E., additional, González Perez, J. M., additional, Ulla, A., additional, Fraga, L., additional, Kanaan, A., additional, Reed, M., additional, Kawaler, S., additional, O'Brien, M. S., additional, Metcalfe, T. S., additional, Nather, R. E., additional, Sanwal, D., additional, Klumpe, E. W., additional, Mukadam, A., additional, Wood, M. A., additional, Ahrens, T. J., additional, Silvestri, N., additional, Sullivan, D., additional, Sullivan, T., additional, Jiang, X. J., additional, Xu, D. W., additional, Ashoka, B. N., additional, Leibowitz, E., additional, Ibbetson, P., additional, Ofek, E., additional, Kilkenny, D., additional, Meištas, E. G., additional, Alisauskas, D., additional, Janulis, R., additional, Kalytis, R., additional, Moskalik, P., additional, Zola, S., additional, Krzesinski, J., additional, Ogloza, W., additional, Handler, G., additional, Silvotti, R., additional, and Bernabei, S., additional

Published
2006
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69. DQ Herculis in Profile: Whole Earth Telescope Observations and Smoothed Particle Hydrodynamics Simulations of an Edge‐on Cataclysmic Variable System

Author

Wood, M. A., primary, Robertson, J. R., additional, Simpson, J. C., additional, Kawaler, S. D., additional, O’Brien, M. S., additional, Nather, R. E., additional, Winget, D. E., additional, Montgomery, M. H., additional, Metcalfe, T. S., additional, Jiang, X. J., additional, Leibowitz, E. M., additional, Ibbetson, P., additional, O’Donoghue, D., additional, Zola, S., additional, Krzesinski, J., additional, Pajdosz, G., additional, Vauclair, G., additional, Dolez, N., additional, Chevreton, M., additional, Sullivan, D. J., additional, Kanaan, A., additional, and Nitta, A., additional

Published
2005
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70. Whole Earth Telescope observations of BPM 37093: A seismological test of crystallization theory in white dwarfs

Author

Kanaan, A., primary, Nitta, A., additional, Winget, D. E., additional, Kepler, S. O., additional, Montgomery, M. H., additional, Metcalfe, T. S., additional, Oliveira, H., additional, Fraga, L., additional, da Costa, A. F. M., additional, Costa, J. E. S., additional, Castanheira, B. G., additional, Giovannini, O., additional, Nather, R. E., additional, Mukadam, A., additional, Kawaler, S. D., additional, O'Brien, M. S., additional, Reed, M. D., additional, Kleinman, S. J., additional, Provencal, J. L., additional, Watson, T. K., additional, Kilkenny, D., additional, Sullivan, D. J., additional, Sullivan, T., additional, Shobbrook, B., additional, Jiang, X. J., additional, Ashoka, B. N., additional, Seetha, S., additional, Leibowitz, E., additional, Ibbetson, P., additional, Mendelson, H., additional, Meištas, E. G., additional, Kalytis, R., additional, Ališauskas, D., additional, O'Donoghue, D., additional, Buckley, D., additional, Martinez, P., additional, van Wyk, F., additional, Stobie, R., additional, Marang, F., additional, van Zyl, L., additional, Ogloza, W., additional, Krzesinski, J., additional, Zola, S., additional, Moskalik, P., additional, Breger, M., additional, Stankov, A., additional, Silvotti, R., additional, Piccioni, A., additional, Vauclair, G., additional, Dolez, N., additional, Chevreton, M., additional, Deetjen, J., additional, Dreizler, S., additional, Schuh, S., additional, Gonzalez Perez, J. M., additional, Østensen, R., additional, Ulla, A., additional, Manteiga, M., additional, Suarez, O., additional, Burleigh, M. R., additional, and Barstow, M. A., additional

Published
2005
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71. Whole Earth Telescope observations of the pulsating hot white dwarf PG 1707+427

Author

Kawaler, S. D., primary, Potter, E. M., additional, Vučković, M., additional, Dind, Z. E., additional, O'Toole, S., additional, Clemens, J. C., additional, O'Brien, M. S., additional, Grauer, A. D., additional, Nather, R. E., additional, Moskalik, P. A., additional, Claver, C. F., additional, Fontaine, G., additional, Wesemael, F., additional, Bergeron, P., additional, Vauclair, G., additional, Dolez, N., additional, Chevreton, M., additional, Kleinman, S. J., additional, Watson, T. K., additional, Barstow, M. A., additional, Sansom, A. E., additional, Winget, D. E., additional, Kepler, S. O., additional, Kanaan, A., additional, Bradley, P. A., additional, Dixson, J., additional, Provencal, J., additional, and Bedding, T. R., additional

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2004
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72. 9+ frequencies for V534 Tauri, aδScuti variable in the Pleiades

Author

Li, Z.-P., primary, Michel, E., additional, Fox Machado, L., additional, Álvarez, M., additional, Chevreton, M., additional, Hernández, M. M., additional, Zhou, A. Y., additional, Barban, C., additional, Dolez, N., additional, Belmonte, J. A., additional, Fernandez, A., additional, Fremy, J.-R., additional, Pau, S., additional, Servan, B., additional, Pérez Hernández, F., additional, Jiang, S. Y., additional, Liu, Z. L., additional, Ringot, O., additional, Suárez, J. C., additional, and Xu, Y., additional

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2004
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73. Observations of the pulsating subdwarf B star Feige 48: Constraints on evolution and companions

Author

Reed, M. D., primary, Kawaler, S. D., additional, Zola, S., additional, Jiang, X. J., additional, Dreizler, S., additional, Schuh, S. L., additional, Deetjen, J. L., additional, Kalytis, R., additional, Meištas, E., additional, Janulis, R., additional, Ališauskas, D., additional, Krzesiński, J., additional, Vuckovic, M., additional, Moskalik, P., additional, Ogłoza, W., additional, Baran, A., additional, Stachowski, G., additional, Kurtz, D. W., additional, González Pérez, J. M., additional, Mukadam, A., additional, Watson, T. K., additional, Koen, C., additional, Bradley, P. A., additional, Cunha, M. S., additional, Kilic, M., additional, Klumpe, E. W., additional, Carlton, R. F., additional, Handler, G., additional, Kilkenny, D., additional, Riddle, R., additional, Dolez, N., additional, Vauclair, G., additional, Chevreton, M., additional, Wood, M. A., additional, Grauer, A., additional, Bromage, G., additional, Solheim, J. E., additional, Østensen, R., additional, Ulla, A., additional, Burleigh, M., additional, Good, S., additional, Hürkal, Ö., additional, Anderson, R., additional, and Pakstiene, E., additional

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2004
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74. Observations of the Pulsating White Dwarf G 185–32

Author

Castanheira, B. G., primary, Kepler, S. O., additional, Moskalik, P., additional, Zoła, S., additional, Pajdosz, G., additional, Krzesiński, J., additional, O'Donoghue, D., additional, Katz, M., additional, Buckley, D., additional, Vauclair, G., additional, Dolez, N., additional, Chevreton, M., additional, Barstow, M. A., additional, Kanaan, A., additional, Giovannini, O., additional, Provencal, J., additional, Kawaler, S. D., additional, Clemens, J. C., additional, Nather, R. E., additional, Winget, D. E., additional, Watson, T. K., additional, Yanagida, K., additional, Dixson, J. S., additional, Hansen, C. J., additional, Bradley, P. A., additional, Wood, M. A., additional, Sullivan, D. J., additional, Kleinman, S. J., additional, Meistas, E., additional, Solheim, J.-E., additional, Bruvold, A., additional, Leibowitz, E., additional, Mazeh, T., additional, Koester, D., additional, and Montgomery, M. H., additional

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2003
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75. A Whole Earth Telescope campaign on the pulsating subdwarf B binary system PG 1336−018 (NY Vir)

Author

Kilkenny, D., primary, Reed, M. D., additional, O'Donoghue, D., additional, Kawaler, S. D., additional, Mukadam, A., additional, Kleinman, S. J., additional, Nitta, A., additional, Metcalfe, T. S., additional, Provencal, J. L., additional, Watson, T. K., additional, Sullivan, D. J., additional, Sullivan, T., additional, Shobbrook, R., additional, Jiang, X. J., additional, Joshi, S., additional, Ashoka, B. N., additional, Seetha, S., additional, Leibowitz, E., additional, Ibbetson, P., additional, Mendelson, H., additional, Meištas, E., additional, Kalytis, R., additional, Ališauskas, D., additional, Martinez, P., additional, van Wyk, F., additional, Stobie, R. S., additional, Marang, F., additional, Zola, S., additional, Krzesinski, J., additional, Ogłoza, W., additional, Moskalik, P., additional, Silvotti, R., additional, Piccioni, A., additional, Vauclair, G., additional, Dolez, N., additional, Chevreton, M., additional, Dreizler, S., additional, Schuh, S. L., additional, Deetjen, J. L., additional, Solheim, J.-E., additional, Gonzalez Perez, J. M., additional, Ulla, A., additional, Østensen, R., additional, Manteiga, M., additional, Suarez, O., additional, Burleigh, M., additional, Kepler, S. O., additional, Kanaan, A., additional, and Giovannini, O., additional

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2003
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76. Constraining the Evolution of ZZ Ceti

Author

Mukadam, Anjum S., primary, Kepler, S. O., additional, Winget, D. E., additional, Nather, R. E., additional, Kilic, M., additional, Mullally, F., additional, von Hippel, T., additional, Kleinman, S. J., additional, Nitta, A., additional, Guzik, J. A., additional, Bradley, P. A., additional, Matthews, J., additional, Sekiguchi, K., additional, Sullivan, D. J., additional, Sullivan, T., additional, Shobbrook, R. R., additional, Birch, P., additional, Jiang, X. J., additional, Xu, D. W., additional, Joshi, S., additional, Ashoka, B. N., additional, Ibbetson, P., additional, Leibowitz, E., additional, Ofek, E. O., additional, Meištas, E. G., additional, Janulis, R., additional, Ališauskas, D., additional, Kalytis, R., additional, Handler, G., additional, Kilkenny, D., additional, O’Donoghue, D., additional, Kurtz, D. W., additional, Muller, M., additional, Moskalik, P., additional, Ogłoza, W., additional, Zoła, S., additional, Krzesiński, J., additional, Johannessen, F., additional, Gonzalez‐Perez, J. M., additional, Solheim, J.‐E., additional, Silvotti, R., additional, Bernabei, S., additional, Vauclair, G., additional, Dolez, N., additional, Fu, J. N., additional, Chevreton, M., additional, Manteiga, M., additional, Suarez, O., additional, Ulla, A., additional, Cunha, M. S., additional, Metcalfe, T. S., additional, Kanaan, A., additional, Fraga, L., additional, Costa, A. F. M., additional, Giovannini, O., additional, Fontaine, G., additional, Bergeron, P., additional, O’Brien, M. S., additional, Sanwal, D., additional, Wood, M. A., additional, Ahrens, T. J., additional, Silvestri, N., additional, Klumpe, E. W., additional, Kawaler, S. D., additional, Riddle, R., additional, Reed, M. D., additional, and Watson, T. K., additional

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2003
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78. Amplitude and frequency variability of the pulsating DB white dwarf stars KUV 05134+2605 and PG 1654+160 observed with the Whole Earth Telescope

Author

Handler, G., primary, O'Donoghue, D., additional, Muller, M., additional, Solheim, J.- E., additional, Gonzalez-Perez, J. M., additional, Johannessen, F., additional, Paparo, M., additional, Szeidl, B., additional, Viraghalmy, G., additional, Silvotti, R., additional, Vauclair, G., additional, Dolez, N., additional, Pallier, E., additional, Chevreton, M., additional, Kurtz, D. W., additional, Bromage, G. E., additional, Cunha, M. S., additional, Ostensen, R., additional, Fraga, L., additional, Kanaan, A., additional, Amorim, A., additional, Giovannini, O., additional, Kepler, S. O., additional, Da Costa, A. F. M., additional, Anderson, R. F., additional, Wood, M. A., additional, Silvestri, N., additional, Klumpe, E. W., additional, Carlton, R. F., additional, Miller, R. H., additional, McFarland, J. P., additional, Grauer, A. D., additional, Kawaler, S. D., additional, Riddle, R. L., additional, Reed, M. D., additional, Nather, R. E., additional, Winget, D. E., additional, Hill, J. A., additional, Metcalfe, T. S., additional, Mukadam, A. S., additional, Kilic, M., additional, Watson, T. K., additional, Kleinman, S. J., additional, Nitta, A., additional, Guzik, J. A., additional, Bradley, P. A., additional, Sekiguchi, K., additional, Sullivan, D. J., additional, Sullivan, T., additional, Shobbrook, R. R., additional, Jiang, X., additional, Birch, P. V., additional, Ashoka, B. N., additional, Seetha, S., additional, Girish, V., additional, Joshi, S., additional, Dorokhova, T. N., additional, Dorokhov, N. I., additional, Akan, M. C., additional, Meistas, E. G., additional, Janulis, R., additional, Kalytis, R., additional, Alisauskas, D., additional, Anguma, S. K., additional, Kalebwe, P. C., additional, Moskalik, P., additional, Ogloza, W., additional, Stachowski, G., additional, Pajdosz, G., additional, and Zola, S., additional

Published
2003
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79. The everchanging pulsating white dwarf GD358

Author

Kepler, S. O., primary, Nather, R. E., additional, Winget, D. E., additional, Nitta, A., additional, Kleinman, S. J., additional, Metcalfe, T., additional, Sekiguchi, K., additional, Xiaojun, Jiang, additional, Sullivan, D., additional, Sullivan, T., additional, Janulis, R., additional, Meistas, E., additional, Kalytis, R., additional, Krzesinski, J., additional, Ogłoza, W., additional, Zola, S., additional, O'Donoghue, D., additional, Romero-Colmenero, E., additional, Martinez, P., additional, Dreizler, S., additional, Deetjen, J., additional, Nagel, T., additional, Schuh, S. L., additional, Vauclair, G., additional, Ning, Fu Jian, additional, Chevreton, M., additional, Solheim, J.-E., additional, Gonzalez Perez, J. M., additional, Johannessen, F., additional, Kanaan, A., additional, Costa, J. E., additional, Murillo Costa, A. F., additional, Wood, M. A., additional, Silvestri, N., additional, Ahrens, T. J., additional, Jones, A. K., additional, Collins, A. E., additional, Boyer, M., additional, Shaw, J. S., additional, Mukadam, A., additional, Klumpe, E. W., additional, Larrison, J., additional, Kawaler, S., additional, Riddle, R., additional, Ulla, A., additional, and Bradley, P., additional

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2003
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81. New δ Scuti variable in the Pleiades: HD 23628

Author

Li, Z. P., primary, Michel, E., additional, Fox Machado, L., additional, Álvarez, M., additional, Hernández, M. M., additional, Chevreton, M., additional, Zhou, A. Y., additional, Barban, C., additional, Dolez, N., additional, Belmonte, J. A., additional, Fernandez, A., additional, Fremy, J., additional, Pau, S., additional, Servan, B., additional, Pérez Hernández, F., additional, Jiang, S. Y., additional, Liu, Z. L., additional, Ringot, O., additional, Suárez, J. C., additional, and Xu, Y., additional

Published
2002
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82. Pulsational frequencies in theδScuti stars V624 Tauri and HD 23194

Author

Fox-Machado, L., primary, Álvarez, M., additional, Michel, E., additional, Li, Z. P., additional, Pérez Hernández, F., additional, Chevreton, M., additional, Barban, C., additional, Belmonte, J. A., additional, Dolez, N., additional, Fernandez, A., additional, Guo, J. P., additional, Haywood, M., additional, Liu, Y. Y., additional, Pau, S., additional, Planas, H., additional, and Servan, B., additional

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2002
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84. Multi-Site Observations of the Delta Scuti Stars V624 Tauri and HD 23194

Author

Machado, L. Fox, primary, Álvarez, M., additional, Michel, E., additional, Li, Z.P., additional, Pérez Hernández, F., additional, Chevreton, M., additional, Belmonte, J.A., additional, Alonso, R., additional, Barban, C., additional, Dolez, N., additional, Fernandez, A., additional, Guo, J.P., additional, Haywood, M., additional, Liu, Y.Y., additional, Pau, S., additional, Planas, H., additional, Servan, B., additional, and Suárez, J.-C., additional

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2002
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85. Asteroseismology of RXJ 2117+3412, the hottest pulsating PG 1159 star

Author

Vauclair, G., primary, Moskalik, P., additional, Pfeiffer, B., additional, Chevreton, M., additional, Dolez, N., additional, Serre, B., additional, Kleinman, S. J., additional, Barstow, M., additional, Sansom, A. E., additional, Solheim, J.-E., additional, Belmonte, J. A., additional, Kawaler, S. D., additional, Kepler, S. O., additional, Kanaan, A., additional, Giovannini, O., additional, Winget, D. E., additional, Watson, T. K., additional, Nather, R. E., additional, Clemens, J. C., additional, Provencal, J., additional, Dixson, J. S., additional, Yanagida, K., additional, Nitta Kleinman, A., additional, Montgomery, M., additional, Klumpe, E. W., additional, Bruvold, A., additional, O'Brien, M. S., additional, Hansen, C. J., additional, Grauer, A. D., additional, Bradley, P. A., additional, Wood, M. A., additional, Achilleos, N., additional, Jiang, S. Y., additional, Fu, J. N., additional, Marar, T. M. K., additional, Ashoka, B. N., additional, Meistas, E. G., additional, Chernyshev, A. V., additional, Mazeh, T., additional, Leibowitz, E., additional, Hemar, S., additional, Krzesiński, J., additional, Pajdosz, G., additional, and Zoła, S., additional

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2002
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86. The pulsation modes of the pre-white dwarf PG 1159-035*

Author

Costa, J. E. S., Kepler, S. O., Winget, D. E., O'Brien, M. S., Kawaler, S. D., Costa, A. F. M., Giovannini, O., Kanaan, A., Mukadam, A. S., Mullally, F., Nitta, A., Provençal, J. L., Shipman, H., Wood, M. A., Ahrens, T. J., Grauer, A., Kilic, M., Bradley, P. A., Sekiguchi, K., Crowe, R., Jiang, X. J., Sullivan, D., Sullivan, T., Rosen, R., Clemens, J. C., Janulis, R., O'Donoghue, D., Ogloza, W., Baran, A., Silvotti, R., Marinoni, S., Vauclair, G., Dolez, N., Chevreton, M., Dreizler, S., Schuh, S., Deetjen, J., Nagel, T., Solheim, J.-E., Gonzalez Perez, J. M., Ulla, A., Barstow, M., Burleigh, M., Good, S., Metcalfe, T. S., Kim, S.-L., Lee, H., Sergeev, A., Akan, M. C., Çakırlı, Ö., Paparo, M., Viraghalmy, G., Ashoka, B. N., Handler, G., Hürkal, Ö., Johannessen, F., Kleinman, S. J., Kalytis, R., Krzesinski, J., Klumpe, E., Larrison, J., Lawrence, T., Meištas, E., Martinez, P., Nather, R. E., Fu, J.-N., Pakštienė, E., Rosen, R., Romero-Colmenero, E., Riddle, R., Seetha, S., Silvestri, N. M., Vučković, M., Warner, B., Zola, S., Althaus, L. G., Córsico, A. H., Montgomery, M. H., Costa, J. E. S., Kepler, S. O., Winget, D. E., O'Brien, M. S., Kawaler, S. D., Costa, A. F. M., Giovannini, O., Kanaan, A., Mukadam, A. S., Mullally, F., Nitta, A., Provençal, J. L., Shipman, H., Wood, M. A., Ahrens, T. J., Grauer, A., Kilic, M., Bradley, P. A., Sekiguchi, K., Crowe, R., Jiang, X. J., Sullivan, D., Sullivan, T., Rosen, R., Clemens, J. C., Janulis, R., O'Donoghue, D., Ogloza, W., Baran, A., Silvotti, R., Marinoni, S., Vauclair, G., Dolez, N., Chevreton, M., Dreizler, S., Schuh, S., Deetjen, J., Nagel, T., Solheim, J.-E., Gonzalez Perez, J. M., Ulla, A., Barstow, M., Burleigh, M., Good, S., Metcalfe, T. S., Kim, S.-L., Lee, H., Sergeev, A., Akan, M. C., Çakırlı, Ö., Paparo, M., Viraghalmy, G., Ashoka, B. N., Handler, G., Hürkal, Ö., Johannessen, F., Kleinman, S. J., Kalytis, R., Krzesinski, J., Klumpe, E., Larrison, J., Lawrence, T., Meištas, E., Martinez, P., Nather, R. E., Fu, J.-N., Pakštienė, E., Rosen, R., Romero-Colmenero, E., Riddle, R., Seetha, S., Silvestri, N. M., Vučković, M., Warner, B., Zola, S., Althaus, L. G., Córsico, A. H., and Montgomery, M. H.

Abstract

Context.PG 1159-035, a pre-white dwarf with $T_{{\rm eff}}$$\simeq$140 000 K, is the prototype of both two classes: the PG 1159 spectroscopic class and the DOV pulsating class. Previous studies of PG 1159-035photometric data obtained with the Whole Earth Telescope (WET) showed a rich frequency spectrum allowing the identification of 122 pulsation modes. Analyzing the periods of pulsation, it is possible to measure the stellar mass, the rotational period and the inclination of the rotation axis, to estimate an upper limit for the magnetic field, and even to obtain information about the inner stratification of the star.

Published
2008
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87. Pulsational frequencies of the eclipsing δScuti star HD 172189. Results of the STEPHI XIII campaign*

Author

Costa, J. E. S., Michel, E., Peña, J., Creevey, O., Li, Z. P., Chevreton, M., Belmonte, J. A., Alvarez, M., Fox Machado, L., Parrao, L., Pérez Hernéndez, F., Fernández, A., Fremy, J. R., Pau, S., Alonso, R., Costa, J. E. S., Michel, E., Peña, J., Creevey, O., Li, Z. P., Chevreton, M., Belmonte, J. A., Alvarez, M., Fox Machado, L., Parrao, L., Pérez Hernéndez, F., Fernández, A., Fremy, J. R., Pau, S., and Alonso, R.

Abstract

Context.The eclipsing δScuti star HD 172189is a probable member of the open cluster IC 4756and a promising candidate target for the CoRoT mission.

Published
2007
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88. δ Scuti stars in Praesepe

Author

Frandsen, S., primary, Pigulski, A., additional, Nuspl, J., additional, Breger, M., additional, Belmonte, J. A., additional, Dall, T. H., additional, Arentoft, T., additional, Sterken, C., additional, Medupe, T., additional, Gupta, S. K., additional, Pinheiro, F. J. G., additional, Monteiro, M. J. P. F. G., additional, Barban, C., additional, Chevreton, M., additional, Michel, E., additional, Benkő, J. M., additional, Barcza, Sz., additional, Szabó, R., additional, Kołaczkowski, Z., additional, Kopacki, G., additional, and Udovichenko, S. N., additional

Published
2001
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89. 9+ frequencies for V534 Tauri, a δScuti variable in the Pleiades*

Author

Li, Z.-P., Michel, E., Fox Machado, L., Álvarez, M., Chevreton, M., Hernández, M. M., Zhou, A. Y., Barban, C., Dolez, N., Belmonte, J. A., Fernandez, A., Fremy, J.-R., Pau, S., Servan, B., Pérez Hernández, F., Jiang, S. Y., Liu, Z. L., Ringot, O., Suárez, J. C., Xu, Y., Li, Z.-P., Michel, E., Fox Machado, L., Álvarez, M., Chevreton, M., Hernández, M. M., Zhou, A. Y., Barban, C., Dolez, N., Belmonte, J. A., Fernandez, A., Fremy, J.-R., Pau, S., Servan, B., Pérez Hernández, F., Jiang, S. Y., Liu, Z. L., Ringot, O., Suárez, J. C., and Xu, Y.

Abstract

New observations of V534 Tau were performed during the STEPHI IX campaign in November 1998. An overall run of 285 h of data has been collected from three sites over a period of 23 days. Period analysis reveals a rich oscillation spectrum with nine frequencies above the 99% confidence level. This oscillation spectrum spans a large range of frequencies, from 179 to 525 μHz (15.52 to 45.36 cycles per day). A preliminary comparison with models suggests that the observed modes would lie in the range of modes from g1or g2to p4or p5, depending on the rotation rate considered for V534 Tau.

Published
2004
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90. Observations of the Pulsating White Dwarf G 185–32

Author

Castanheira, B. G., Kepler, S. O., Moskalik, P., Zoła, S., Pajdosz, G., Krzesiński, J., O'Donoghue, D., Katz, M., Buckley, D., Vauclair, G., Dolez, N., Chevreton, M., Barstow, M. A., Kanaan, A., Giovannini, O., Provencal, J., Kawaler, S. D., Clemens, J. C., Nather, R. E., Winget, D. E., Watson, T. K., Yanagida, K., Dixson, J. S., Hansen, C. J., Bradley, P. A., Wood, M. A., Sullivan, D. J., Kleinman, S. J., Meistas, E., Solheim, J.-E., Bruvold, A., Leibowitz, E., Mazeh, T., Koester, D., Montgomery, M. H., Castanheira, B. G., Kepler, S. O., Moskalik, P., Zoła, S., Pajdosz, G., Krzesiński, J., O'Donoghue, D., Katz, M., Buckley, D., Vauclair, G., Dolez, N., Chevreton, M., Barstow, M. A., Kanaan, A., Giovannini, O., Provencal, J., Kawaler, S. D., Clemens, J. C., Nather, R. E., Winget, D. E., Watson, T. K., Yanagida, K., Dixson, J. S., Hansen, C. J., Bradley, P. A., Wood, M. A., Sullivan, D. J., Kleinman, S. J., Meistas, E., Solheim, J.-E., Bruvold, A., Leibowitz, E., Mazeh, T., Koester, D., and Montgomery, M. H.

Abstract

We observed the pulsating hydrogen atmosphere white dwarf G 185–32 with the Whole Earth Telescope in 1992. We report on a weighted Fourier transform of the data detecting 18 periodicities in its light curve. Using the Hubble Space Telescope Faint Object Spectrograph time resolved spectroscopy, and the wavelength dependence of the relative amplitudes, we identify the spherical harmonic degree ($\ell$) for 14 pulsation signals. We also compare the determinations of effective temperature and surface gravity using the excited modes and atmospheric methods, obtaining $T_{{\rm eff}}=11\,960$±80 K, $\log g=8.02$±0.04 and $M=0.617$±$0.024~M_{\odot}$.

Published
2004
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91. New δScuti variable in the Pleiades: HD 23628

Author

Li, Z. P., Michel, E., Fox Machado, L., Álvarez, M., Hernández, M. M., Chevreton, M., Zhou, A. Y., Barban, C., Dolez, N., Belmonte, J. A., Fernandez, A., Fremy, J., Pau, S., Servan, B., Pérez Hernández, F., Jiang, S. Y., Liu, Z. L., Ringot, O., Suárez, J. C., Xu, Y., Li, Z. P., Michel, E., Fox Machado, L., Álvarez, M., Hernández, M. M., Chevreton, M., Zhou, A. Y., Barban, C., Dolez, N., Belmonte, J. A., Fernandez, A., Fremy, J., Pau, S., Servan, B., Pérez Hernández, F., Jiang, S. Y., Liu, Z. L., Ringot, O., Suárez, J. C., and Xu, Y.

Abstract

We report here the discovery of very low amplitude oscillations in the Pleiades star HD 23628. The 14-nights high quality light curve designates HD 23628 as a new member of the δScuti stars class. Amplitude spectra indicate a multi-periodic pulsation behaviour, and four pulsation frequencies have been detected so far. The frequency distribution suggests the presence of nonradial modes. Pulsation constant values of the four modes are distributed in the range corresponding to fundamental fto p4radial modes.

Published
2002
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92. Pulsational frequencies in the δScuti stars V624 Tauri and HD 23194

Author

Fox-Machado, L., Álvarez, M., Michel, E., Li, Z. P., Pérez Hernández, F., Chevreton, M., Barban, C., Belmonte, J. A., Dolez, N., Fernandez, A., Guo, J. P., Haywood, M., Liu, Y. Y., Pau, S., Planas, H., Servan, B., Fox-Machado, L., Álvarez, M., Michel, E., Li, Z. P., Pérez Hernández, F., Chevreton, M., Barban, C., Belmonte, J. A., Dolez, N., Fernandez, A., Guo, J. P., Haywood, M., Liu, Y. Y., Pau, S., Planas, H., and Servan, B.

Abstract

The results of the tenth multi-site campaign of the STEPHI network are reported. The δScuti stars V624 Tau (HD 23156) and HD 23194, belonging to the Pleiades cluster, were observed photometrically for 34 days on three continents during 1999 November–December. An overall run of 343 hours of data was collected. Seven frequencies for V624 Tau and two frequencies for HD 23194 have been found above a 99% confidence level. These results greatly improve those found in previous studies with much less data. A preliminary comparison of observed and theoretical frequencies suggests that both stars may oscillate with radial and non-radial p modes of radial orders typical among δScuti stars.

Published
2002
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93. δScuti stars in Praesepe*

Author

Frandsen, S., Pigulski, A., Nuspl, J., Breger, M., Belmonte, J. A., Dall, T. H., Arentoft, T., Sterken, C., Medupe, T., Gupta, S. K., Pinheiro, F. J. G., Monteiro, M. J. P. F. G., Barban, C., Chevreton, M., Michel, E., Benkő, J. M., Barcza, Sz., Szabó, R., Kołaczkowski, Z., Kopacki, G., Udovichenko, S. N., Frandsen, S., Pigulski, A., Nuspl, J., Breger, M., Belmonte, J. A., Dall, T. H., Arentoft, T., Sterken, C., Medupe, T., Gupta, S. K., Pinheiro, F. J. G., Monteiro, M. J. P. F. G., Barban, C., Chevreton, M., Michel, E., Benkő, J. M., Barcza, Sz., Szabó, R., Kołaczkowski, Z., Kopacki, G., and Udovichenko, S. N.

Abstract

We present the results of the multisite differential CCD photometry for the two δScuti stars, BN and BV Cnc, in the open cluster Praesepe. The main objective was to identify the character of the pulsation modes in BN Cnc deriving their accurate periods, amplitudes and phases. These parameters are essential for the mode identification which uses combined photometric and spectroscopic data and is presented in the second article. For BN Cnc, six pulsation modes with amplitudes above the detection limit (~0.5 mmag) were detected. Using the same CCD frames it was possible to verify the presence of the four pulsation modes in BV Cnc, the faintest of δScuti stars in Praesepe. It is shown that in this very low-amplitude pulsator, substantial amplitude variations are seen between 1997 and 1998.

Published
2001
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95. Frequency Oscillations in the Delta Scuti Star V534 Tauri: Preliminary Results of the STEPHI IX Campaign

Author

Machado, L. Fox, primary, Li, Z. P., additional, Michel, E., additional, Alvarez, M., additional, Hernández, M. M., additional, Chevreton, M., additional, Zhou, A., additional, Barban, C., additional, Dolez, N., additional, Belmonte, J. A., additional, Fernández, A., additional, Fremy, J., additional, Pau, S., additional, Servan, B., additional, Hernández, F. Pérez, additional, Liu, Y. Y., additional, Fu, J. N., additional, and Ringot, O., additional

Published
2000
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96. Understanding the Cool DA White Dwarf Pulsator, G29−38

Author

Kleinman, S. J., primary, Nather, R. E., additional, Winget, D. E., additional, Clemens, J. C., additional, Bradley, P. A., additional, Kanaan, A., additional, Provencal, J. L., additional, Claver, C. F., additional, Watson, T. K., additional, Yanagida, K., additional, Nitta, A., additional, Dixson, J. S., additional, Wood, M. A., additional, Grauer, A. D., additional, Hine, B. P., additional, Fontaine, G., additional, Liebert, James, additional, Sullivan, D. J., additional, Wickramasinghe, D. T., additional, Achilleos, N., additional, Marar, T. M. K., additional, Seetha, S., additional, Ashoka, B. N., additional, Meištas, E., additional, Leibowitz, E. M., additional, Moskalik, P., additional, Krzesiński, J., additional, Solheim, J.‐E., additional, Bruvold, A., additional, O'Donoghue, D., additional, Kurtz, D. W., additional, Warner, B., additional, Martinez, Peter, additional, Vauclair, G., additional, Dolez, N., additional, Chevreton, M., additional, Barstow, M. A., additional, Kepler, S. O., additional, Giovannini, O., additional, Augusteijn, T., additional, Hansen, C. J., additional, and Kawaler, S. D., additional

Published
1998
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97. Asteroseismology of a Star Cooled by Neutrino Emission: The Pulsating Pre–White Dwarf PG 0122+200

Author

O'Brien, M. S., primary, Vauclair, G., additional, Kawaler, S. D., additional, Watson, T. K., additional, Winget, D. E., additional, Nather, R. E., additional, Montgomery, M., additional, Nitta, A., additional, Kleinman, S. J., additional, Sullivan, D. J., additional, Jiang, X. J., additional, Marar, T. M. K., additional, Seetha, S., additional, Ashoka, B. N., additional, Bhattacharya, J., additional, Leibowitz, E. M., additional, Hemar, S., additional, Ibbetson, P., additional, Warner, B., additional, van Zyl, L., additional, Moskalik, P., additional, Zoła, S., additional, Pajdosz, G., additional, Krzesiński, J., additional, Dolez, N., additional, Chevreton, M., additional, Solheim, J.‐E., additional, Thomassen, T., additional, Kepler, S. O., additional, Giovannini, O., additional, Provencal, J. L., additional, Wood, M. A., additional, and Clemens, J. C., additional

Published
1998
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99. Whole Earth Telescope Observations of the Helium Interacting Binary PG 1346+082 (CR Bootis)

Author

Provencal, J. L., primary, Winget, D. E., additional, Nather, R. E., additional, Robinson, E. L., additional, Clemens, J. C., additional, Bradley, P. A., additional, Claver, C. F., additional, Kleinman, S. J., additional, Grauer, A. D., additional, Hine, B. P., additional, Ferrario, L., additional, O'Donoghue, D., additional, Warner, B., additional, Vauclair, G., additional, Chevreton, M., additional, Kepler, S. O., additional, Wood, M. A., additional, and Henry, G. W., additional

Published
1997
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100. New Whole Earth Telescope observations of CD-24 7599: steps towards Scuti star seismology

Author

Handler, G., primary, Pikall, H., additional, O'Donoghue, D., additional, Buckley, D. A. H., additional, Vauclair, G., additional, Chevreton, M., additional, Giovannini, O., additional, Kepler, S. O., additional, Goode, P. R., additional, Provencal, J. L., additional, Wood, M. A., additional, Clemens, J. C., additional, O'Brien, M. S., additional, Nather, R. E., additional, Winget, D. E., additional, Kleinman, S. J., additional, Kanaan, A., additional, Watson, T. K., additional, Nitta, A., additional, Montgomery, M. H., additional, Klumpe, E. W., additional, Bradley, P. A., additional, Sullivan, D. J., additional, Wu, K., additional, Marar, T. M. K., additional, Seetha, S., additional, Ashoka, B. N., additional, Mahra, H. S., additional, Bhat, B. C., additional, Babu, V. C., additional, Leibowitz, E. M., additional, Hemar, S., additional, Ibbetson, P. A., additional, Mashal, E., additional, Meistas, E. G., additional, Dziembowski, W. A., additional, Pamyatnykh, A. A., additional, Moskalik, P., additional, Zola, S., additional, Pajdosz, G., additional, Krzesinski, J., additional, Solheim, J. E., additional, Bard, S., additional, Massacand, C. M., additional, Breger, M., additional, Gelbmann, M. J., additional, Paunzen, E., additional, and North, P., additional

Published
1997
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