Search Results - "De Cat, P."

Spectroscopic survey of Kepler stars. ★ I. HERMES/Mercator observations of A- and F-type stars by Niemczura, E., Murphy, S. J., Smalley, B., Uytterhoeven, K., Pigulski, A., Lehmann, H., Bowman, D. M., Catanzaro, G., van Aarle, E., Bloemen, S., Briquet, M., De Cat, P., Drobek, D., Eyer, L., Gameiro, J. F. S., Gorlova, N., Kamiński, K., Lampens, P., Marcos-Arenal, P., Pápics, P. I., Vandenbussche, B., Van Winckel, H., Stȩślicki, M., Fagas, M.

“…The Kepler space mission provided near-continuous and high-precision photometry of about 207 000 stars, which can be used for asteroseismology. However, for…”
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Kepler observations of the variability in B-type stars by Balona, L. A., Pigulski, A., Cat, P. De, Handler, G., Gutiérrez-Soto, J., Engelbrecht, C. A., Frescura, F., Briquet, M., Cuypers, J., Daszyńska-Daszkiewicz, J., Degroote, P., Dukes, R. J., Garcia, R. A., Green, E. M., Heber, U., Kawaler, S. D., Lehmann, H., Leroy, B., Molenda-Żakowicz, J., Neiner, C., Noels, A., Nuspl, J., Østensen, R., Pricopi, D., Roxburgh, I., Salmon, S., Smith, M. A., Suárez, J. C., Suran, M., Szabó, R., Uytterhoeven, K., Christensen-Dalsgaard,  , Kjeldsen, H., Caldwell, D. A., Girouard, F. R., Sanderfer, D. T.

“…The analysis of the light curves of 48 B-type stars observed by Kepler is presented. Among these are 15 pulsating stars, all of which show low frequencies,…”
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Study of chemically peculiar stars – I. High-resolution spectroscopy and K2 photometry of Am stars in the region of M44 by Joshi, Santosh, Trust, Otto, Semenko, E, Williams, P E, Lampens, P, De Cat, P, Vermeylen, L, Holdsworth, D L, García, R A, Mathur, S, Santos, A R G, Mkrtichian, D, Goswami, A, Cuntz, M, Yadav, A P, Sarkar, M, Bhatt, B C, Kahraman Aliçavuş, F, Nhlapo, M D, Lund, M N, Goswami, P P, Savanov, I, Jorissen, A, Jurua, E, Avvakumova, E, Dmitrienko, E S, Chakradhari, N K, Das, M K, Chowdhury, S, Abedigamba, O P, Yakunin, I, Letarte, B, Karinkuzhi, D

“…ABSTRACT We present a study based on the high-resolution spectroscopy and K2 space photometry of five chemically peculiar stars in the region of the open…”
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Random forest automated supervised classification of Hipparcos periodic variable stars by Dubath, P., Rimoldini, L., Süveges, M., Blomme, J., López, M., Sarro, L. M., De Ridder, J., Cuypers, J., Guy, L., Lecoeur, I., Nienartowicz, K., Jan, A., Beck, M., Mowlavi, N., De Cat, P., Lebzelter, T., Eyer, L.

“…We present an evaluation of the performance of an automated classification of the Hipparcos periodic variable stars into 26 types. The sub-sample with the most…”
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Analysis of Kepler B stars: rotational modulation and Maia variables by Balona, L. A., Baran, A. S., Daszyńska-Daszkiewicz, J., De Cat, P.

“…We examine 4 yr almost continuous Kepler photometry of 115 B stars. We find that the light curves of 39 per cent of these stars can be described by a…”
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Spectroscopic mode identification of γ Doradus stars by Brunsden, E., Pollard, K.R., Cottrell, P.L., Wright, D.J., Cat, P. De

“…The g-mode pulsations in γ Doradus stars are identified using time-series colour photometry and high-resolution spectroscopy. For 22 class members the…”
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Single-lined eclipsing binaries with δ Scuti components: GQ Dra, RR Lep, and TYC 683-640-1 by Kahraman Aliçavuş, F, Aliçavuş, F, Çoban, Ç G, Handler, G, De Cat, P

“…ABSTRACT Eclipsing binaries with (a) pulsating component(s) are remarkable objects to investigate the evolution and structure of stellar systems. Detailed…”
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Mass transfer and tidally tilted pulsation in the Algol-type system TZ Dra by Kahraman Aliçavuş, F, Handler, G, Aliçavuş, F, De Cat, P, Bedding, T R, Lampens, P, Ekinci, Ö, Gümüș, D, Leone, F

“…ABSTRACT Oscillating eclipsing Algols (oEAs) are remarkable systems that allow us to determine accurate fundamental stellar parameters (mass, radius) and probe…”
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K2 photometry and HERMES spectroscopy of the blue supergiant ρ Leo: rotational wind modulation and low-frequency waves by Aerts, C, Bowman, D M, Símon-Díaz, S, Buysschaert, B, Johnston, C, Moravveji, E, Beck, P G, De Cat, P, Triana, S, Aigrain, S, Castro, N, Huber, D, White, T

“…We present an 80-d long uninterrupted high-cadence K2 light curve of the B1Iab supergiant ρ Leo (HD 91316), deduced with the method of halo photometry. This…”
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Rotation and pulsation in Ap stars: first light results from TESS sectors 1 and 2 by Cunha, M S, Antoci, V, Holdsworth, D L, Kurtz, D W, Balona, L A, Bognár, Zs, Bowman, D M, Guo, Z, Kołaczek-Szymański, P A, Lares-Martiz, M, Paunzen, E, Skarka, M, Smalley, B, Sódor, Á, Kochukhov, O, Pepper, J, Richey-Yowell, T, Ricker, G R, Seager, S, Buzasi, D L, Fox-Machado, L, Hasanzadeh, A, Niemczura, E, Quitral-Manosalva, P, Monteiro, M J P F G, Stateva, I, De Cat, P, García Hernández, A, Ghasemi, H, Handler, G, Hey, D, Matthews, J M, Nemec, J M, Pascual-Granado, J, Safari, H, Suárez, J C, Szabó, R, Tkachenko, A, Weiss, W W

“…Abstract We present the first results from the Transiting Exoplanet Survey Satellite (TESS) on the rotational and pulsational variability of magnetic…”
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Frequency and mode identification of γ Doradus from photometric and spectroscopic observations by Brunsden, E, Pollard, K R, Wright, D J, De Cat, P, Cottrell, P L

“…Abstract The prototype star for the γ Doradus class of pulsating variables was studied employing photometric and spectroscopic observations to determine the…”
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Comprehensive spectroscopic and photometric study of pulsating eclipsing binary star AI Hya by Kahraman Aliçavuş, F, Pawar, T, Hełminiak, K G, Handler, G, Moharana, A, Aliçavuş, F, De Cat, P, Leone, F, Catanzaro, G, Giarrusso, M, Ukita, N, Kambe, E

“…ABSTRACT The pulsating eclipsing binaries are remarkable systems that provide an opportunity to probe the stellar interior and to determine the fundamental…”
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KIC 4768731: a bright long-period roAp star in the Kepler field by Smalley, B., Niemczura, E., Murphy, S. J., Lehmann, H., Kurtz, D. W., Holdsworth, D. L., Cunha, M. S., Balona, L. A., Briquet, M., Bruntt, H., De Cat, P., Lampens, P., Thygesen, A. O., Uytterhoeven, K.

“…We report the identification of 61.45 d−1 (711.2 μHz) oscillations, with amplitudes of 62.6 μmag, in KIC 4768731 (HD 225914) using Kepler photometry. This…”
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TESS Cycle 2 observations of roAp stars with 2-min cadence data by Holdsworth, D L, Cunha, M S, Lares-Martiz, M, Kurtz, D W, Antoci, V, Barceló Forteza, S, De Cat, P, Derekas, A, Kayhan, C, Ozuyar, D, Skarka, M, Hey, D R, Shi, F, Bowman, D M, Kobzar, O, Ayala Gómez, A, Bognár, Zs, Buzasi, D L, Ebadi, M, Fox-Machado, L, García Hernández, A, Ghasemi, H, Guzik, J A, Handberg, R, Handler, G, Hasanzadeh, A, Jayaraman, R, Khalack, V, Kochukhov, O, Lovekin, C C, Mikołajczyk, P, Mkrtichian, D, Murphy, S J, Niemczura, E, Olafsson, B G, Pascual-Granado, J, Paunzen, E, Posiłek, N, Ramón-Ballesta, A, Safari, H, Samadi-Ghadim, A, Smalley, B, Sódor, Á, Stateva, I, Suárez, J C, Szabó, R, Wu, T, Ziaali, E, Zong, W, Seager, S

“…ABSTRACT We present the results of a systematic search of the Transiting Exoplanet Survey Satellite (TESS) 2-min cadence data for new rapidly oscillating Ap…”
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Investigation of the binary fraction among candidate A-F type hybrid stars detected by Kepler by Lampens, P., Bognár, Zs, Frémat, Y., Sódor, Á., Vermeylen, L., De Nutte, R., Lombaert, R., De Cat, P.

“…We are currently monitoring up to 40 Kepler candidate δ Scuti-γ Doradus (resp. γ Doradus-δ Scuti) hybrid stars in radial velocity in order to identify the…”
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Multisite spectroscopic seismic study of the β Cep star V2052 Ophiuchi: inhibition of mixing by its magnetic field by Briquet, M., Neiner, C., Aerts, C., Morel, T., Mathis, S., Reese, D. R., Lehmann, H., Costero, R., Echevarria, J., Handler, G., Kambe, E., Hirata, R., Masuda, S., Wright, D., Yang, S., Pintado, O., Mkrtichian, D., Lee, B.‐C., Han, I., Bruch, A., De Cat, P., Uytterhoeven, K., Lefever, K., Vanautgaerden, J., de Batz, B., Frémat, Y., Henrichs, H., Geers, V. C., Martayan, C., Hubert, A. M., Thizy, O., Tijani, A.

“…ABSTRACT We used extensive ground‐based multisite and archival spectroscopy to derive observational constraints for a seismic modelling of the magnetic β Cep…”
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A comprehensive study of the open cluster NGC 6866 by Bostancı, Z. F., Ak, T., Yontan, T., Bilir, S., Güver, T., Ak, S., Çakırlı, Ö., Özdarcan, O., Paunzen, E., De Cat, P., Fu, J. N., Zhang, Y., Hou, Y., Li, G., Wang, Y., Zhang, W., Shi, J., Wu, Y.

“…We present CCD UBVRI photometry of the field of the open cluster NGC 6866. Structural parameters of the cluster are determined utilizing the stellar density…”
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LAMOST observations in the Kepler field by De Cat, P., Fu, J.N., Yang, X.H., Ren, A.B., Frasca, A., Molenda-Żakowicz, J., Catanzaro, G., Gray, R.O., Corbally, C.J., Shi, J.R., Zhang, H.T., Luo, A.L.

“…The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) at the Xinglong observatory in China is a new 4-m telescope equipped with 4,000 optical…”
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The unusual roAp star KIC 8677585 by Balona, L. A., Catanzaro, G., Crause, L., Cunha, M. S., Gandolfi, D., Hatzes, A., Kabath, P., Uytterhoeven, K., De Cat, P.

“…KIC 8677585 is a roAp star in the Kepler field which is unique in that there are four low-frequency variations of unknown origin in addition to more than 20…”
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The classification of frequencies in the γ Doradus/δ Scuti hybrid star HD 49434 by Brunsden, E, Pollard, K R, Cottrell, P L, Uytterhoeven, K, Wright, D J, De Cat, P

“…Hybrid stars of the ... Doradus and ... Scuti pulsation types have great potential for asteroseismic analysis to explore their interior structure. To achieve…”
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