| MOLNÁR, L., A. BÓDI, A. PÁL, A. BHARDWAJ, F–J. HAMBSCH, J. M. BENKŐ, A. DEREKAS, M. EBADI, M. JOYCE, A. HASANZADEH, K. KOLENBERG, M. B. LUND, J. M. NEMEC, H. NETZEL, C. –C. NGEOW, J. PEPPER, E. PLACHY, Z. PRUDIL, R. J. SIVERD, Marek SKARKA, R. SMOLEC, Á. SÓDOR, S. SYLLA, P. SZABÓ, R. SZABÓ, H. KJELDSEN, J. CHRISTENSEN-DALSGAARD and G. R. RICKER. First Results on RR Lyrae Stars with the TESS Space Telescope: Untangling the Connections between Mode Content, Colors, and Distances. Astrophysical Journal, Supplement Series. BRISTOL: IOP PUBLISHING LTD, 2022, vol. 258, No 1, p. 1-44. ISSN 0067-0049. Available from: https://dx.doi.org/10.3847/1538-4365/ac2ee2. |
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@article{1855717,
author = {Molnár, L. and Bódi, A. and Pál, A. and Bhardwaj, A. and Hambsch, F–J. and Benkő, J. M. and Derekas, A. and Ebadi, M. and Joyce, M. and Hasanzadeh, A. and Kolenberg, K. and Lund, M. B. and Nemec, J. M. and Netzel, H. and Ngeow, C. –C. and Pepper, J. and Plachy, E. and Prudil, Z. and Siverd, R. J. and Skarka, Marek and Smolec, R. and Sódor, Á. and Sylla, S. and Szabó, P. and Szabó, R. and Kjeldsen, H. and ChristensenandDalsgaard, J. and Ricker, G. R.},
article_location = {BRISTOL},
article_number = {1},
doi = {http://dx.doi.org/10.3847/1538-4365/ac2ee2},
keywords = {Pulsating variable stars; RR Lyrae variable stars; Stellar photometry},
language = {eng},
issn = {0067-0049},
journal = {Astrophysical Journal, Supplement Series},
title = {First Results on RR Lyrae Stars with the TESS Space Telescope: Untangling the Connections between Mode Content, Colors, and Distances},
url = {https://iopscience.iop.org/article/10.3847/1538-4365/ac2ee2},
volume = {258},
year = {2022}
}
TY - JOUR
ID - 1855717
AU - Molnár, L. - Bódi, A. - Pál, A. - Bhardwaj, A. - Hambsch, F–J. - Benkő, J. M. - Derekas, A. - Ebadi, M. - Joyce, M. - Hasanzadeh, A. - Kolenberg, K. - Lund, M. B. - Nemec, J. M. - Netzel, H. - Ngeow, C. –C. - Pepper, J. - Plachy, E. - Prudil, Z. - Siverd, R. J. - Skarka, Marek - Smolec, R. - Sódor, Á. - Sylla, S. - Szabó, P. - Szabó, R. - Kjeldsen, H. - Christensen-Dalsgaard, J. - Ricker, G. R.
PY - 2022
TI - First Results on RR Lyrae Stars with the TESS Space Telescope: Untangling the Connections between Mode Content, Colors, and Distances
JF - Astrophysical Journal, Supplement Series
VL - 258
IS - 1
SP - 1-44
EP - 1-44
PB - IOP PUBLISHING LTD
SN - 00670049
KW - Pulsating variable stars
KW - RR Lyrae variable stars
KW - Stellar photometry
UR - https://iopscience.iop.org/article/10.3847/1538-4365/ac2ee2
N2 - The Transiting Exoplanet Survey Satellite (TESS) space telescope is collecting continuous, high-precision optical photometry of stars throughout the sky, including thousands of RR Lyrae stars. In this paper, we present results for an initial sample of 118 nearby RR Lyrae stars observed in TESS Sectors 1 and 2. We use differential image photometry to generate light curves and analyze their mode content and modulation properties. We combine accurate light-curve parameters from TESS with parallax and color information from the Gaia mission to create a comprehensive classification scheme. We build a clean sample, preserving RR Lyrae stars with unusual light-curve shapes, while separating other types of pulsating stars. We find that a large fraction of RR Lyrae stars exhibit various low-amplitude modes, but the distribution of those modes is markedly different from those of the bulge stars. This suggests that differences in physical parameters have an observable effect on the excitation of extra modes, potentially offering a way to uncover the origins of these signals. However, mode identification is hindered by uncertainties when identifying the true pulsation frequencies of the extra modes. We compare mode amplitude ratios in classical double-mode stars to stars with extra modes at low amplitudes and find that they separate into two distinct groups. Finally, we find a high percentage of modulated stars among the fundamental mode pulsators, but also find that at least 28% of them do not exhibit modulation, confirming that a significant fraction of stars lack the Blazhko effect.
ER -
MOLNÁR, L., A. BÓDI, A. PÁL, A. BHARDWAJ, F–J. HAMBSCH, J. M. BENK$\backslash$H O, A. DEREKAS, M. EBADI, M. JOYCE, A. HASANZADEH, K. KOLENBERG, M. B. LUND, J. M. NEMEC, H. NETZEL, C. –C. NGEOW, J. PEPPER, E. PLACHY, Z. PRUDIL, R. J. SIVERD, Marek SKARKA, R. SMOLEC, Á. SÓDOR, S. SYLLA, P. SZABÓ, R. SZABÓ, H. KJELDSEN, J. CHRISTENSEN-DALSGAARD and G. R. RICKER. First Results on RR Lyrae Stars with the TESS Space Telescope: Untangling the Connections between Mode Content, Colors, and Distances. \textit{Astrophysical Journal, Supplement Series}. BRISTOL: IOP PUBLISHING LTD, 2022, vol.~258, No~1, p.~1-44. ISSN~0067-0049. Available from: https://dx.doi.org/10.3847/1538-4365/ac2ee2.
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