TESS Cycle 2 observations of roAp stars with 2-min cadence data
Article
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., Bognar, Zs., Buzasi, D. L., Ebadi, M., ..., Seager, S.. 2024. "TESS Cycle 2 observations of roAp stars with 2-min cadence data." Monthly Notices of the Royal Astronomical Society. 527 (4), pp. 9548-9580. https://doi.org/10.1093/mnras/stad3800
| Article Title | TESS Cycle 2 observations of roAp stars with 2-min cadence data |
|---|---|
| ERA Journal ID | 1074 |
| Article Category | Article |
| Authors | 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., Bognar, Zs., Buzasi, D. L., Ebadi, M., Fox-Machado, L., Garcia Hernandez, 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., Ramon-Ballesta, A., Safari, H., Samadi-Ghadim, A., Smalley, B., Sodor, A., Stateva, I., Suarez, J. C., Szabo, R., Wu, T., Ziaali, E., Zong, W. and Seager, S. |
| Journal Title | Monthly Notices of the Royal Astronomical Society |
| Journal Citation | 527 (4), pp. 9548-9580 |
| Number of Pages | 33 |
| Year | 2024 |
| Publisher | Oxford University Press |
| Place of Publication | United Kingdom |
| ISSN | 0035-8711 |
| 1365-2966 | |
| Digital Object Identifier (DOI) | https://doi.org/10.1093/mnras/stad3800 |
| Web Address (URL) | https://academic.oup.com/mnras/article/527/4/9548/7464054 |
| 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 (roAp) stars observed during the Cycle 2 phase of its mission. We find seven new roAp stars previously unreported as such and present the analysis of a further 25 roAp stars that are already known. Three of the new stars show multiperiodic pulsations, while all new members are rotationally variable stars, leading to almost 70 per cent (22) of the roAp stars presented being α2 CVn-type variable stars. We show that targeted observations of known chemically peculiar stars are likely to overlook many new roAp stars, and demonstrate that multiepoch observations are necessary to see pulsational behaviour changes. We find a lack of roAp stars close to the blue edge of the theoretical roAp instability strip, and reaffirm that mode instability is observed more frequently with precise, space-based observations. In addition to the Cycle 2 observations, we analyse TESS data for all-known roAp stars. This amounts to 18 further roAp stars observed by TESS. Finally, we list six known roAp stars that TESS is yet to observe. We deduce that the incidence of roAp stars amongst the Ap star population is just 5.5 per cent, raising fundamental questions about the conditions required to excite pulsations in Ap stars. This work, coupled with our previous work on roAp stars in Cycle 1 observations, presents the most comprehensive, homogeneous study of the roAp stars in the TESS nominal mission, with a collection of 112 confirmed roAp stars in total. |
| Keywords | asteroseismology; stars: individual; stars: variables; stars: oscillations; stars: chemically peculiar; techniques: photometric |
| Contains Sensitive Content | Does not contain sensitive content |
| ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
| Byline Affiliations | University of Central Lancashire, United Kingdom |
| South African Astronomical Observatory, South Africa | |
| University of Porto, Portugal | |
| Institute of Astrophysics of Andalusia, Spain | |
| North-West University, South Africa | |
| Technical University of Denmark, Denmark | |
| University of Granada, Spain | |
| Royal Observatory of Belgium | |
| Eotvos Lorand University (ELTE), Hungary | |
| MTA-ELTE Lendület “Momentum” Milky Way Research Group, Hungary | |
| HUN-REN-SZTE Stellar Astrophysics Research Group, Hungary | |
| Erciyes University, Turkiye | |
| Ankara University, Turkiye | |
| Masaryk University, Czech Republic | |
| Astronomical Institute of Czech Academy of Sciences, Czech Republic | |
| University of Hawaii, United States | |
| Peking University, China | |
| University of Newcastle | |
| Institute of Astronomy, Belgium | |
| University of Moncton, Canada | |
| Parque Empresarial Nuevo Torneo, Spain | |
| Konkoly Observatory, Hungary | |
| Florida Gulf Coast University, United States | |
| University of Tehran, Iran | |
| National Autonomous University of Mexico, Mexico | |
| Institute for Advanced Studies in Basic Sciences, Iran | |
| Los Alamos National Laboratory, United States | |
| Aarhus University, Denmark | |
| Polish Academy of Sciences, Poland | |
| University of Warwick, United Kingdom | |
| Uppsala University, Sweden | |
| Mount Allison University, Canada | |
| University of Warsaw, Poland | |
| National Astronomical Research Institute of Thailand, Thailand | |
| Centre for Astrophysics | |
| University of Zanjan, Iran | |
| Max Planck Institute for Solar System Research, Germany | |
| Keele University, United Kingdom | |
| Bulgarian Academy of Sciences, Bulgaria | |
| Chinese Academy of Sciences, China | |
| University of Chinese Academy of Sciences, China | |
| Beijing Normal University, China | |
| Massachusetts Institute of Technology, United States |
Permalink -
https://research.usq.edu.au/item/z5v10/tess-cycle-2-observations-of-roap-stars-with-2-min-cadence-data
Download files
51
total views20
total downloads1
views this month1
downloads this month