First kepler results on rrlyrae stars

K. Kolenberg, R. Szabó, D. W. Kurtz, R. L. Gilliland, J. Christensen-Dalsgaard, H. Kjeldsen, T. M. Brown, J. Benkő, M. Chadid, A. Derekas, M. Di Criscienzo, E. Guggenberger, K. Kinemuchi, A. Kunder, Z. Kolláth, G. Kopacki, P. Moskalik, J. M. Nemec, J. Nuspl, R. SilvottiM. D. Suran, W. J. Borucki, D. Koch, J. M. Jenkins

Research output: Contribution to journalArticle

78 Citations (Scopus)

Abstract

We present the first results of our analyses of selected RRLyrae stars for which data have been obtained by the Kepler Mission. As expected, we find a significant fraction of the RRab stars to show the Blazhko effect, a still unexplained phenomenon that manifests itself as periodic amplitude and phase modulations of the light curve, on timescales of typically tens to hundreds of days. The long time span of the Kepler Mission of 3.5yr and the unprecedentedly high precision of its data provide a unique opportunity for the study of RRLyrae stars. Using data of a modulated star observed in the first roll as a showcase, we discuss the data, our analyses, findings, and their implications for our understanding of RRLyrae stars and the Blazhko effect. With at least 40% of the RR Lyrae stars in our sample showing modulation, we confirm the high incidence rate that was only found in recent high-precision studies. Moreover, we report the occurrence of additional frequencies, beyond the main pulsation mode and its modulation components. Their half-integer ratio to the main frequency is reminiscent of a period doubling effect caused by resonances, observed for the first time in RRLyrae stars.

Original languageEnglish
JournalAstrophysical Journal Letters
Volume713
Issue number2 PART 2
DOIs
Publication statusPublished - 2010

Fingerprint

stars
Kepler mission
modulation
timescale
period doubling
phase modulation
light curve
integers
incidence
effect
occurrences
rate

Keywords

  • Stars: individual: (KIC5559631 (V783 Cyg), KIC3733346 (NR Lyr) and KIC7198959 (RR Lyr))
  • Stars: oscillations
  • Stars: variables: RR Lyrae

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Kolenberg, K., Szabó, R., Kurtz, D. W., Gilliland, R. L., Christensen-Dalsgaard, J., Kjeldsen, H., ... Jenkins, J. M. (2010). First kepler results on rrlyrae stars. Astrophysical Journal Letters, 713(2 PART 2). https://doi.org/10.1088/2041-8205/713/2/L198

First kepler results on rrlyrae stars. / Kolenberg, K.; Szabó, R.; Kurtz, D. W.; Gilliland, R. L.; Christensen-Dalsgaard, J.; Kjeldsen, H.; Brown, T. M.; Benkő, J.; Chadid, M.; Derekas, A.; Criscienzo, M. Di; Guggenberger, E.; Kinemuchi, K.; Kunder, A.; Kolláth, Z.; Kopacki, G.; Moskalik, P.; Nemec, J. M.; Nuspl, J.; Silvotti, R.; Suran, M. D.; Borucki, W. J.; Koch, D.; Jenkins, J. M.

In: Astrophysical Journal Letters, Vol. 713, No. 2 PART 2, 2010.

Research output: Contribution to journalArticle

Kolenberg, K, Szabó, R, Kurtz, DW, Gilliland, RL, Christensen-Dalsgaard, J, Kjeldsen, H, Brown, TM, Benkő, J, Chadid, M, Derekas, A, Criscienzo, MD, Guggenberger, E, Kinemuchi, K, Kunder, A, Kolláth, Z, Kopacki, G, Moskalik, P, Nemec, JM, Nuspl, J, Silvotti, R, Suran, MD, Borucki, WJ, Koch, D & Jenkins, JM 2010, 'First kepler results on rrlyrae stars', Astrophysical Journal Letters, vol. 713, no. 2 PART 2. https://doi.org/10.1088/2041-8205/713/2/L198
Kolenberg K, Szabó R, Kurtz DW, Gilliland RL, Christensen-Dalsgaard J, Kjeldsen H et al. First kepler results on rrlyrae stars. Astrophysical Journal Letters. 2010;713(2 PART 2). https://doi.org/10.1088/2041-8205/713/2/L198
Kolenberg, K. ; Szabó, R. ; Kurtz, D. W. ; Gilliland, R. L. ; Christensen-Dalsgaard, J. ; Kjeldsen, H. ; Brown, T. M. ; Benkő, J. ; Chadid, M. ; Derekas, A. ; Criscienzo, M. Di ; Guggenberger, E. ; Kinemuchi, K. ; Kunder, A. ; Kolláth, Z. ; Kopacki, G. ; Moskalik, P. ; Nemec, J. M. ; Nuspl, J. ; Silvotti, R. ; Suran, M. D. ; Borucki, W. J. ; Koch, D. ; Jenkins, J. M. / First kepler results on rrlyrae stars. In: Astrophysical Journal Letters. 2010 ; Vol. 713, No. 2 PART 2.
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AU - Christensen-Dalsgaard, J.

AU - Kjeldsen, H.

AU - Brown, T. M.

AU - Benkő, J.

AU - Chadid, M.

AU - Derekas, A.

AU - Criscienzo, M. Di

AU - Guggenberger, E.

AU - Kinemuchi, K.

AU - Kunder, A.

AU - Kolláth, Z.

AU - Kopacki, G.

AU - Moskalik, P.

AU - Nemec, J. M.

AU - Nuspl, J.

AU - Silvotti, R.

AU - Suran, M. D.

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AU - Koch, D.

AU - Jenkins, J. M.

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