{"day":"01","intvolume":" 534","DOAJ_listed":"1","file":[{"content_type":"application/pdf","creator":"dernst","checksum":"b79f3c6a5991516abbcc8d34fa4bfb5f","relation":"main_file","access_level":"open_access","file_id":"18182","file_size":2813008,"success":1,"file_name":"2024_MonthlyNRoyalAstronSoc_Hatt.pdf","date_created":"2024-10-07T09:14:03Z","date_updated":"2024-10-07T09:14:03Z"}],"language":[{"iso":"eng"}],"type":"journal_article","publication_identifier":{"eissn":["1365-2966"],"issn":["0035-8711"]},"citation":{"ista":"Hatt EJ, Ong JMJ, Nielsen MB, Chaplin WJ, Davies GR, Deheuvels S, Ballot J, Li G, Bugnet LA. 2024. Asteroseismic signatures of core magnetism and rotation in hundreds of low-luminosity red giants. Monthly Notices of the Royal Astronomical Society. 534(2), 1060–1076.","ieee":"E. J. Hatt et al., “Asteroseismic signatures of core magnetism and rotation in hundreds of low-luminosity red giants,” Monthly Notices of the Royal Astronomical Society, vol. 534, no. 2. Oxford Academic, pp. 1060–1076, 2024.","ama":"Hatt EJ, Ong JMJ, Nielsen MB, et al. Asteroseismic signatures of core magnetism and rotation in hundreds of low-luminosity red giants. Monthly Notices of the Royal Astronomical Society. 2024;534(2):1060-1076. doi:10.1093/mnras/stae2053","chicago":"Hatt, Emily J., J. M.Joel Ong, Martin B. Nielsen, William J. Chaplin, Guy R. Davies, Sébastien Deheuvels, Jérôme Ballot, Gang Li, and Lisa Annabelle Bugnet. “Asteroseismic Signatures of Core Magnetism and Rotation in Hundreds of Low-Luminosity Red Giants.” Monthly Notices of the Royal Astronomical Society. Oxford Academic, 2024. https://doi.org/10.1093/mnras/stae2053.","short":"E.J. Hatt, J.M.J. Ong, M.B. Nielsen, W.J. Chaplin, G.R. Davies, S. Deheuvels, J. Ballot, G. Li, L.A. Bugnet, Monthly Notices of the Royal Astronomical Society 534 (2024) 1060–1076.","apa":"Hatt, E. J., Ong, J. M. J., Nielsen, M. B., Chaplin, W. J., Davies, G. R., Deheuvels, S., … Bugnet, L. A. (2024). Asteroseismic signatures of core magnetism and rotation in hundreds of low-luminosity red giants. Monthly Notices of the Royal Astronomical Society. Oxford Academic. https://doi.org/10.1093/mnras/stae2053","mla":"Hatt, Emily J., et al. “Asteroseismic Signatures of Core Magnetism and Rotation in Hundreds of Low-Luminosity Red Giants.” Monthly Notices of the Royal Astronomical Society, vol. 534, no. 2, Oxford Academic, 2024, pp. 1060–76, doi:10.1093/mnras/stae2053."},"date_updated":"2024-11-11T08:56:04Z","has_accepted_license":"1","article_type":"original","tmp":{"image":"/images/cc_by.png","short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"issue":"2","volume":534,"date_created":"2024-10-06T22:01:11Z","status":"public","_id":"18172","PlanS_conform":"1","author":[{"full_name":"Hatt, Emily J.","first_name":"Emily J.","last_name":"Hatt"},{"full_name":"Ong, J. M.Joel","first_name":"J. M.Joel","last_name":"Ong"},{"first_name":"Martin B.","last_name":"Nielsen","full_name":"Nielsen, Martin B."},{"last_name":"Chaplin","first_name":"William J.","full_name":"Chaplin, William J."},{"full_name":"Davies, Guy R.","first_name":"Guy R.","last_name":"Davies"},{"full_name":"Deheuvels, Sébastien","last_name":"Deheuvels","first_name":"Sébastien"},{"last_name":"Ballot","first_name":"Jérôme","full_name":"Ballot, Jérôme"},{"full_name":"Li, Gang","last_name":"Li","first_name":"Gang"},{"full_name":"Bugnet, Lisa Annabelle","orcid":"0000-0003-0142-4000","id":"d9edb345-f866-11ec-9b37-d119b5234501","first_name":"Lisa Annabelle","last_name":"Bugnet"}],"oa_version":"Published Version","oa":1,"month":"10","publisher":"Oxford Academic","quality_controlled":"1","doi":"10.1093/mnras/stae2053","publication":"Monthly Notices of the Royal Astronomical Society","article_processing_charge":"Yes","ddc":["520"],"OA_type":"gold","acknowledgement":"EJH, WJC, and GRD acknowledge the support of Science and Technology Facilities Council. MBN acknowledges support from the UK Space Agency. JMJO acknowledges support from NASA through the NASA Hubble Fellowship grant HST-HF2-51517.001, awarded by STScI (Space Telescope Science Institute), which is operated by the Association of Universities for Research in Astronomy, Incorporated, under NASA contract NAS5-26555. The authors acknowledge use of the Blue-BEAR HPC service at the University of Birmingham. This paper includes data collected by the Kepler mission and obtained from the MAST data archive at the Space Telescope Science Institute (STScI). Funding for the Kepler mission was provided by the NASA Science Mission Directorate. This work has made use of data from the European Space Agency (ESA) mission Gaia (https://www.cosmos.esa.int/web/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC was provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. This paper received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (CartographY GA. 804752). SD and JB acknowledge support from the Centre National d’Etudes Spatiales (CNES).","abstract":[{"lang":"eng","text":"Red Giant stars host solar-like oscillations which have mixed character, being sensitive to conditions both in the outer convection zone and deep within the interior. The properties of these modes are sensitive to both core rotation and magnetic fields. While asteroseismic studies of the former have been done on a large scale, studies of the latter are currently limited to tens of stars. We aim to produce the first large catalogue of both magnetic and rotational perturbations. We jointly constrain these parameters by devising an automated method for fitting the power spectra directly. We successfully apply the method to 302 low-luminosity red giants. We find a clear bimodality in core rotation rate. The primary peak is at δνrot = 0.32 μHz, and the secondary at δνrot = 0.47 μHz. Combining our results with literature values, we find that the percentage of stars rotating much more rapidly than the population average increases with evolutionary state. We measure magnetic splittings of 2σ significance in 23 stars. While the most extreme magnetic splitting values appear in stars with masses > 1.1M⊙, implying they formerly hosted a convective core, a small but statistically significant magnetic splitting is measured at lower masses. Asymmetry between the frequencies of a rotationally split multiplet has previously been used to diagnose the presence of a magnetic perturbation. We find that of the stars with a significant detection of magnetic perturbation, 43\\% do not show strong asymmetry. We find no strong evidence of correlation between the rotation and magnetic parameters."}],"date_published":"2024-10-01T00:00:00Z","page":"1060-1076","year":"2024","external_id":{"arxiv":["2409.01157"]},"publication_status":"published","file_date_updated":"2024-10-07T09:14:03Z","OA_place":"publisher","department":[{"_id":"LiBu"}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","scopus_import":"1","arxiv":1,"title":"Asteroseismic signatures of core magnetism and rotation in hundreds of low-luminosity red giants"}