Por favor, use este identificador para citar o enlazar este ítem:
http://hdl.handle.net/20.500.12666/249
Registro completo de metadatos
Campo DC | Valor | Idioma |
---|---|---|
dc.rights.license | © ESO 2020 | - |
dc.contributor.author | Burssens, S. | - |
dc.contributor.author | Simón Díaz, S. | - |
dc.contributor.author | Bowman, D. M. | - |
dc.contributor.author | Holgado, G. | - |
dc.contributor.author | Michielsen, M. | - |
dc.contributor.author | De Burgos, A. | - |
dc.contributor.author | Castro, N. | - |
dc.contributor.author | Barbá, R. H. | - |
dc.contributor.author | Aerts, C. | - |
dc.contributor.other | Unidad de Excelencia Científica María de Maeztu Centro de Astrobiología del Instituto Nacional de Técnica Aeroespacial y CSIC, MDM-2017-0737 | - |
dc.date.accessioned | 2021-04-12T10:30:30Z | - |
dc.date.available | 2021-04-12T10:30:30Z | - |
dc.date.issued | 2020-07-13 | - |
dc.identifier.citation | Astronomy and Astrophysics 639: A81(2020) | es |
dc.identifier.issn | 0004-6361 | - |
dc.identifier.other | https://www.aanda.org/articles/aa/abs/2020/07/aa37700-20/aa37700-20.html | - |
dc.identifier.uri | http://hdl.handle.net/20.500.12666/249 | - |
dc.description | Based on observations made with the Nordic Optical Telescope (FIES), operated by NOTSA, and the Mercator Telescope (HERMES), operated by the Flemish Community, both at the Observatorio del Roque de los Muchachos (La Palma, Spain) of the Instituto de Astrofísica de Canarias. In addition, observations collected with the FEROS spectrograph at the La Silla observatory in the framework of the OWN survey were used. | es |
dc.description.abstract | Context. The lack of high-precision long-term continuous photometric data for large samples of stars has impeded the large-scale exploration of pulsational variability in the OB star regime. As a result, the candidates for in-depth asteroseismic modelling have remained limited to a few dozen dwarfs. The TESS nominal space mission has surveyed the southern sky, including parts of the galactic plane, yielding continuous data across at least 27 d for hundreds of OB stars. Aims. We aim to couple TESS data in the southern sky with ground-based spectroscopy to study the variability in two dimensions, mass and evolution. We focus mainly on the presence of coherent pulsation modes that may or may not be present in the predicted theoretical instability domains and unravel all frequency behaviour in the amplitude spectra of the TESS data. Methods. We compose a sample of 98 OB-type stars observed by TESS in Sectors 1–13 and with available multi-epoch, high-resolution spectroscopy gathered by the IACOB and OWN surveys. We present the short-cadence 2 min light curves of dozens of OB-type stars, which have one or more spectra in the IACOB or OWN database. Based on these light curves and their Lomb–Scargle periodograms, we performed variability classification and frequency analysis. We placed the stars in the spectroscopic Hertzsprung–Russell diagram to interpret the variability in an evolutionary context. Results. We deduce the diverse origins of the mmag-level variability found in all of the 98 OB stars in the TESS data. We find among the sample several new variable stars, including three hybrid pulsators, three eclipsing binaries, high frequency modes in a Be star, and potential heat-driven pulsations in two Oe stars. Conclusions. We identify stars for which future asteroseismic modelling is possible, provided mode identification is achieved. By comparing the position of the variables to theoretical instability strips, we discuss the current shortcomings in non-adiabatic pulsation theory and the distribution of pulsators in the upper Hertzsprung–Russell diagram. | es |
dc.description.sponsorship | SB is thankful to the sta ff of the IAC for the possibility of and kind hospitality during his research visit there, which made this joint project possible. SB and MM are grateful to Rich Townsend for his inspiring and highly didactical tutorial on mode excitation during the 2019 MESA summer school and for his continuous e fforts to upgrade the GYRE pulsation code for the benefit of the asteroseismology community. The MESA developers are also thanked for their e fforts. We thank the anonymous referee for helpful comments that have improved the quality of the paper. The research leading to these results has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement No. 670519: MAMSIE). S-SD acknowledges support from the Spanish Government Ministerio de Ciencia, Innovacion y Universidades through grants PGC-2018-091 3741-B-C22. This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France. Some/all of the data presented in this paper were obtained from the Mikulski Archive for Space Telescopes (MAST). STScI is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. The computational resources and services used in this work were provided by the VSC (Flemish Supercomputer Center), funded by the Research Foundation -Flanders (FWO) and the Flemish Government -department EWI; With funding from the Spanish government through the "María de Maeztu Unit of Excellence" accreditation (MDM-2017-0737) | es |
dc.language.iso | eng | es |
dc.publisher | EDP Sciences | es |
dc.relation | info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PGC2018-0913741-B-C22 | - |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 International | es |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | - |
dc.subject | Technques: photometric | es |
dc.subject | Techniques: spectroscopic | es |
dc.subject | Stars: massive | es |
dc.subject | Stars: oscillations | es |
dc.title | Variability of OB stars from TESS southern Sectors 1–13 and high-resolution IACOB and OWN spectroscopy | es |
dc.type | info:eu-repo/semantics/article | es |
dc.contributor.orcid | Holgado, G. [0000-0002-9296-8259] | - |
dc.contributor.orcid | Bowman, D. [0000-0001-7402-3852] | - |
dc.contributor.orcid | Burssens, S. [0000-0002-1593-0863] | - |
dc.contributor.orcid | Aerts, C. [0000-0003-1822-7126] | - |
dc.identifier.doi | 10.1051/0004-6361/202037700 | - |
dc.identifier.e-issn | 1432-0746 | - |
dc.contributor.funder | Agencia Estatal de Investigación (AEI) | - |
dc.contributor.funder | European Research Council (ERC) | - |
dc.contributor.funder | National Aeronautics and Space Administration (NASA) | - |
dc.description.peerreviewed | Peer review | es |
dc.type.hasVersion | info:eu-repo/semantics/publishedVersion | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
dc.type.coar | http://purl.org/coar/resource_type/c_6501 | - |
dc.relation.projectID | info:eu-repo/grantAgreement/EC/H2020/670519 | - |
Aparece en las colecciones: | (CAB) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
aa37700-20.pdf | 56,39 MB | Adobe PDF | Visualizar/Abrir |
Este ítem está sujeto a una licencia Creative Commons Licencia Creative Commons