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Towards ensemble asteroseismology of the young open clusters Chi Persei and NGC 6910

Autor: Saesen, S., Pigulski, A., Carrier, F., Michalska, G., Aerts, C., De Ridder, J., Briquet, M., Handler, G., Kolaczkowski, Z., Acke, B., Bauwens, E., Beck, P. G., Blom, Y., Blommaert, J., Broeders, E., Cherix, M., Davignon, G., Debosscher, J., Degroote, P., Decin, L., Dehaes, S., De Meester, W., Deroo, P., Desmet, M., Drummond, R., Eggen, J. R., Fu, J., Gazeas, K., Gelven, G. A., Gielen, C., Huygen, R., Jiang, X., Kalomeni, B., Kim, S. -L., Kim, D. H., Kopacki, G., Kwon, J. -H., Ladjal, D., Lee, C. -U., Lee, Y. -J., Lefever, K., Leitner, A., Lenz, P., Liakos, A., Lorenz, D., Narwid, A., Niarchos, P., Oestensen, R., Poretti, E., Prins, S., Provencal, J., Antolin, E. Puga, Puschnig, J., Raskin, G., Reed, M. D., Reyniers, M., Schmidt, E., Schmitzberger, L., Spano, M., Steininger, B., Steslicki, M., Uytterhoeven, K., Vanautgaerden, J., Vandenbussche, B., Van Helshoecht, V., Vanhollebeke, E., Van Winckel, H., Verhoelst, T., Vuckovic, M., Waelkens, C., Wolf, G. W., Yakut, K., Zhang, C., Zima, W.

Publikováno v: Astronomische Nachrichten 331, No. 9/10, 1080 - 1083 (2010)

As a result of the variability survey in Chi Persei and NGC6910, the number of Beta Cep stars that are members of these two open clusters is increased to twenty stars, nine in NGC6910 and eleven in Chi Persei. We compare pulsational properties, in pa

Externí odkaz: http://arxiv.org/abs/1004.2853

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Photometric multi-site campaign on the open cluster NGC 884 I. Detection of the variable stars

Autor: Saesen, S., Carrier, F., Pigulski, A., Aerts, C., Handler, G., Narwid, A., Fu, J. N., Zhang, C., Jiang, X. J., Vanautgaerden, J., Kopacki, G., Stȩślicki, M., Acke, B., Poretti, E., Uytterhoeven, K., Gielen, C., Østensen, R., De Meester, W., Reed, M. D., Kołaczkowski, Z., Michalska, G., Schmidt, E., Yakut, K., Leitner, A., Kalomeni, B., Cherix, M., Spano, M., Prins, S., Van Helshoecht, V., Zima, W., Huygen, R., Vandenbussche, B., Lenz, P., Ladjal, D., Antolín, E. Puga, Verhoelst, T., De Ridder, J., Niarchos, P., Liakos, A., Lorenz, D., Dehaes, S., Reyniers, M., Davignon, G., Kim, S. -L., Kim, D. H., Lee, Y. -J., Lee, C. -U., Kwon, J. -H., Broeders, E., Van Winckel, H., Vanhollebeke, E., Waelkens, C., Raskin, G., Blom, Y., Eggen, J. R., Degroote, P., Beck, P., Puschnig, J., Schmitzberger, L., Gelven, G. A., Steininger, B., Blommaert, J., Drummond, R., Briquet, M., Debosscher, J.

CONTEXT: Recent progress in the seismic interpretation of field beta Cep stars has resulted in improvements of the physics in the stellar structure and evolution models of massive stars. Further asteroseismic constraints can be obtained from studying

Externí odkaz: http://arxiv.org/abs/1001.1116

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Structure of the outer layers of cool standard stars

Autor: Dehaes, S., Bauwens, E., Decin, L., Eriksson, K., Raskin, G., Butler, B., Dowell, C. D., Ali, B., Blommaert, J. A. D. L.

Context: Among late-type red giants, an interesting change occurs in the structure of the outer atmospheric layers as one moves to later spectral types in the Hertzsprung-Russell diagram: a chromosphere is always present, but the coronal emission dim

Externí odkaz: http://arxiv.org/abs/0905.1240

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Detection of `parent' molecules from the inner wind of AGB stars as tracers of non-equilibrium chemistry

Autor: Decin, L., Cherchneff, I., Hony, S., Dehaes, S., De Breuck, C., Menten, K. M.

Asymptotic Giant Branch (AGB) stars are typified by strong dust-driven, molecular outflows. For long, it was believed that the molecular setup of the circumstellar envelope of AGB stars is primarily determined by the atmospheric C/O ratio. However, r

Externí odkaz: http://arxiv.org/abs/0801.1118

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The variable mass loss of the AGB star WX Psc as traced by the CO J=1-0 through 7-6 lines and the dust emission

Autor: Decin, L., Hony, S., de Koter, A., Molenberghs, G., Dehaes, S., Markwick-Kemper, F.

Low and intermediate mass stars lose a significant fraction of their mass through a dust-driven wind during the Asymptotic Giant Branch (AGB) phase. Recent studies show that winds from late-type stars are far from being smooth. Mass-loss variations o

Externí odkaz: http://arxiv.org/abs/0708.4107

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Continuum emission around AGB stars at 1.2 mm

Autor: Dehaes, S., Groenewegen, M. A. T., Decin, L., Hony, S., Raskin, G., Blommaert, J. A. D. L.

Publikováno v: Mon.Not.Roy.Astron.Soc.377:931-944,2007

It is generally acknowledged that the mass loss of Asymptotic Giant Branch (AGB) stars undergoes variations on different time scales. We constructed models for the dust envelopes for a sample of AGB stars to assess whether mass-loss variations influe

Externí odkaz: http://arxiv.org/abs/astro-ph/0702628

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