Unveiling the power spectra of delta Scuti stars with TESS The temperature, gravity, and frequency scaling relation

Autor: A. García Hernández, David Barrado, Enrique Solano, Juan Carlos Suárez, S. Barceló Forteza, Susana Martín-Ruiz, A. Moya
Přispěvatelé: Martín Ruiz, S. https://orcid.org/0000-0001-9281-2919, National Aeronautics and Space Administration (NASA), Ministerio de Ciencia e Innovación (MICINN), European Commission (EU), Agencia Estatal de Investigación (AEI), Universidad de Granada (UGR), Junta de Andalucía, Unidad de Excelencia Científica María de Maeztu Centro de Astrobiología del Instituto Nacional de Técnica Aeroespacial y CSIC, MDM-2017-0737, Centros de Excelencia Severo Ochoa, INSTITUTO DE ASTROFISICA DE ANDALUCIA (IAA), SEV-2017-0709, Ministerio de Economía y Competitividad (MINECO), European Research Council (ERC), National Aeronautics and Space Administration (US), Ministerio de Ciencia, Innovación y Universidades (España), European Commission, Agencia Estatal de Investigación (España), Universidad de Granada
Rok vydání: 2020
Předmět:
Zdroj: DIGITAL.INTA Repositorio Digital del Instituto Nacional de Técnica Aeroespacial
Instituto Nacional de Técnica Aeroespacial (INTA)
Digital.CSIC. Repositorio Institucional del CSIC
instname
DOI: 10.13039/501100000780
Popis: Thanks to high-precision photometric data legacy from space telescopes like CoRoT andKepler, the scientific community could detect and characterize the power spectra of hundreds of thousands of stars. Using the scaling relations, it is possible to estimate masses and radii for solar-type pulsators. However, these stars are not the only kind of stellar objects that follow these rules:delta Scuti stars seem to be characterized with seismic indexes such as the large separation (Delta nu). Thanks to long-duration high-cadence TESS light curves, we analysed more than two thousand of this kind of classical pulsators. In that way, we propose the frequency at maximum power (nu(max)) as a proper seismic index since it is directly related with the intrinsic temperature, mass and radius of the star. This parameter seems not to be affected by rotation, inclination, extinction or resonances, with the exception of the evolution of the stellar parameters. Furthermore, we can constrain rotation and inclination using the departure of temperature produced by the gravity-darkening effect. This is especially feasible for fast rotators as most of delta Scuti stars seem to be. © ESO 2020.
We also thank the CoRoT, Kepler, and TESS teams whose efforts made these results possible. The CoRoT space mission was developed and operated by CNES, with contributions from Austria, Belgium, Brazil, ESA (RSSD and Science Program), Germany and Spain. Funding for Kepler's Discovery mission is provided by NASA's Science Mission Directorate. Funding for the TESS mission is provided by the NASA Explorer Program. The authors acknowledge the effort made by TASOC WG4 that helped us in our target selection. This publication makes use of VOSA, developed under the Spanish Virtual Observatory project supported by the Spanish MICIU through Grant AyA2017-84089. VOSA has been partially updated by using funding from the European Union's Horizon 2020 Research and Innovation Programme, under Grant Agreement No. 776403 (EXOPLANETS-A). SBF and DB received financial support from the Spanish State Research Agency (AEI) Projects No. ESP2017-87676-C5-1-R and No. MDM-2017-0737 Unidad de Excelencia "Maria de Maeztu"- Centro de Astrobiologia (INTA-CSIC). AM acknowledges funding from the European Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie Grant agreement No. 749962 (project THOT). SMR acknowledges financial support from the State Agency for Research of the Spanish MICIU through the "Center of Excellence Severo Ochoa" award to the Instituto de Astrofisica de Andalucia (SEV-2017-0709). JCS and AGH acknowledge funding support from Spanish public funds (including FEDER fonds) for research under project ESP2017-87676-C5-2-R and ESP2017-87676-C5-5-R. JCS also acknowledges support from project RYC-2012-09913 under the "Ramon y Cajal" program of the Spanish Ministry of Science and Education. AGH acknowledges support from "Universidad de Granada" under project E-FQM-041-UGR18 from "Programa Operativo FEDER 2014-2020" programme by "Junta de Andalucia" regional Government.
Databáze: OpenAIRE
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