TESS first look at evolved compact pulsators: Asteroseismology of the pulsating helium-atmosphere white dwarf TIC 257459955
- Autores
- Bell, Keaton; Corsico, Alejandro Hugo; Bischoff Kim, Agnès; Althaus, Leandro Gabriel; Bradley, Paul; Calcaferro, Leila Magdalena; Montgomery, Michael; Uzundag, Murat; Baran, Andrzej; Bognár, Zsófia; Charpinet, Stéphane; Ghasemi, Hamed; Hermes, J. J.
- Año de publicación
- 2019
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Context. Pulsation frequencies reveal the interior structures of white dwarf stars, shedding light on the properties of these compact objects that represent the final evolutionary stage of most stars. Two-minute cadence photometry from the Transiting Exoplanet Survey Satellite (TESS) records pulsation signatures from bright white dwarfs over the entire sky. Aims. As part of a series of first-light papers from TESS Asteroseismic Science Consortium Working Group 8, we aim to demonstrate the sensitivity of TESS data, by measuring pulsations of helium-atmosphere white dwarfs in the DBV instability strip, and what asteroseismic analysis of these measurements can reveal about their stellar structures. We present a case study of the pulsating DBV WD 0158-160 that was observed as TIC 257459955 with the two-minute cadence for 20.3 days in TESS Sector 3. Methods. We measured the frequencies of variability of TIC 257459955 with an iterative periodogram and prewhitening procedure. The measured frequencies were compared to calculations from two sets of white dwarf models to constrain the stellar parameters: the fully evolutionary models from LPCODE and the structural models from WDEC. Results. We detected and measured the frequencies of nine pulsation modes and eleven combination frequencies of WD 0158-160 to ∼0.01 μHz precision. Most, if not all, of the observed pulsations belong to an incomplete sequence of dipole (ℓ = 1) modes with a mean period spacing of 38.1 ± 1.0 s. The global best-fit seismic models from both LPCODE and WDEC have effective temperatures that are ≥ 3000 K hotter than archival spectroscopic values of 24 100-25 500 K; however, cooler secondary solutions are found that are consistent with both the spectroscopic effective temperature and distance constraints from Gaia astrometry. Conclusions. Our results demonstrate the value of the TESS data for DBV white dwarf asteroseismology. The extent of the short-cadence photometry enables reliably accurate and extremely precise pulsation frequency measurements. Similar subsets of both the LPCODE and WDEC models show good agreement with these measurements, supporting that the asteroseismic interpretation of DBV observations from TESS is not dominated by the set of models used. However, given the sensitivity of the observed set of pulsation modes to the stellar structure, external constraints from spectroscopy and/or astrometry are needed to identify the best seismic solutions.
Fil: Bell, Keaton. Max planck institut Für Sonnensystemforschung; Alemania. University Aarhus; Dinamarca
Fil: Corsico, Alejandro Hugo. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Bischoff Kim, Agnès. Penn State Worthington Scranton; Estados Unidos
Fil: Althaus, Leandro Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Bradley, Paul. Los Alamos National Laboratory; Estados Unidos
Fil: Calcaferro, Leila Magdalena. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Montgomery, Michael. University of Texas at Austin; Estados Unidos
Fil: Uzundag, Murat. Universidad de Valparaíso; Chile
Fil: Baran, Andrzej. Uniwersytet Pedagogiczny; Polonia
Fil: Bognár, Zsófia. Mta Csfk Lendület Near-field Cosmology Research Group; Hungría. Mta Research Centre For Astronomy. Konkoly Observatory; Hungría
Fil: Charpinet, Stéphane. Université de Toulouse; Francia. Centre National de la Recherche Scientifique; Francia
Fil: Ghasemi, Hamed. Institute For Advanced Studies In Basic Sciences; Irán
Fil: Hermes, J. J.. Boston University; Estados Unidos - Materia
-
ASTEROSEISMOLOGY
STARS: OSCILLATIONS
STARS: VARIABLES: GENERAL
WHITE DWARFS - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by/2.5/ar/
- Repositorio
.jpg)
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/125374
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TESS first look at evolved compact pulsators: Asteroseismology of the pulsating helium-atmosphere white dwarf TIC 257459955Bell, KeatonCorsico, Alejandro HugoBischoff Kim, AgnèsAlthaus, Leandro GabrielBradley, PaulCalcaferro, Leila MagdalenaMontgomery, MichaelUzundag, MuratBaran, AndrzejBognár, ZsófiaCharpinet, StéphaneGhasemi, HamedHermes, J. J.ASTEROSEISMOLOGYSTARS: OSCILLATIONSSTARS: VARIABLES: GENERALWHITE DWARFShttps://purl.org/becyt/ford/1.7https://purl.org/becyt/ford/1Context. Pulsation frequencies reveal the interior structures of white dwarf stars, shedding light on the properties of these compact objects that represent the final evolutionary stage of most stars. Two-minute cadence photometry from the Transiting Exoplanet Survey Satellite (TESS) records pulsation signatures from bright white dwarfs over the entire sky. Aims. As part of a series of first-light papers from TESS Asteroseismic Science Consortium Working Group 8, we aim to demonstrate the sensitivity of TESS data, by measuring pulsations of helium-atmosphere white dwarfs in the DBV instability strip, and what asteroseismic analysis of these measurements can reveal about their stellar structures. We present a case study of the pulsating DBV WD 0158-160 that was observed as TIC 257459955 with the two-minute cadence for 20.3 days in TESS Sector 3. Methods. We measured the frequencies of variability of TIC 257459955 with an iterative periodogram and prewhitening procedure. The measured frequencies were compared to calculations from two sets of white dwarf models to constrain the stellar parameters: the fully evolutionary models from LPCODE and the structural models from WDEC. Results. We detected and measured the frequencies of nine pulsation modes and eleven combination frequencies of WD 0158-160 to ∼0.01 μHz precision. Most, if not all, of the observed pulsations belong to an incomplete sequence of dipole (ℓ = 1) modes with a mean period spacing of 38.1 ± 1.0 s. The global best-fit seismic models from both LPCODE and WDEC have effective temperatures that are ≥ 3000 K hotter than archival spectroscopic values of 24 100-25 500 K; however, cooler secondary solutions are found that are consistent with both the spectroscopic effective temperature and distance constraints from Gaia astrometry. Conclusions. Our results demonstrate the value of the TESS data for DBV white dwarf asteroseismology. The extent of the short-cadence photometry enables reliably accurate and extremely precise pulsation frequency measurements. Similar subsets of both the LPCODE and WDEC models show good agreement with these measurements, supporting that the asteroseismic interpretation of DBV observations from TESS is not dominated by the set of models used. However, given the sensitivity of the observed set of pulsation modes to the stellar structure, external constraints from spectroscopy and/or astrometry are needed to identify the best seismic solutions.Fil: Bell, Keaton. Max planck institut Für Sonnensystemforschung; Alemania. University Aarhus; DinamarcaFil: Corsico, Alejandro Hugo. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Bischoff Kim, Agnès. Penn State Worthington Scranton; Estados UnidosFil: Althaus, Leandro Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Bradley, Paul. Los Alamos National Laboratory; Estados UnidosFil: Calcaferro, Leila Magdalena. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Montgomery, Michael. University of Texas at Austin; Estados UnidosFil: Uzundag, Murat. Universidad de Valparaíso; ChileFil: Baran, Andrzej. Uniwersytet Pedagogiczny; PoloniaFil: Bognár, Zsófia. Mta Csfk Lendület Near-field Cosmology Research Group; Hungría. Mta Research Centre For Astronomy. Konkoly Observatory; HungríaFil: Charpinet, Stéphane. Université de Toulouse; Francia. Centre National de la Recherche Scientifique; FranciaFil: Ghasemi, Hamed. Institute For Advanced Studies In Basic Sciences; IránFil: Hermes, J. J.. Boston University; Estados UnidosEDP Sciences2019-11-26info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/125374Bell, Keaton; Corsico, Alejandro Hugo; Bischoff Kim, Agnès; Althaus, Leandro Gabriel; Bradley, Paul; et al.; TESS first look at evolved compact pulsators: Asteroseismology of the pulsating helium-atmosphere white dwarf TIC 257459955; EDP Sciences; Astronomy and Astrophysics; 632; A42; 26-11-2019; 1-130004-6361CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/10.1051/0004-6361/201936340info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201936340info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:01:22Zoai:ri.conicet.gov.ar:11336/125374instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:01:22.94CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
| dc.title.none.fl_str_mv |
TESS first look at evolved compact pulsators: Asteroseismology of the pulsating helium-atmosphere white dwarf TIC 257459955 |
| title |
TESS first look at evolved compact pulsators: Asteroseismology of the pulsating helium-atmosphere white dwarf TIC 257459955 |
| spellingShingle |
TESS first look at evolved compact pulsators: Asteroseismology of the pulsating helium-atmosphere white dwarf TIC 257459955 Bell, Keaton ASTEROSEISMOLOGY STARS: OSCILLATIONS STARS: VARIABLES: GENERAL WHITE DWARFS |
| title_short |
TESS first look at evolved compact pulsators: Asteroseismology of the pulsating helium-atmosphere white dwarf TIC 257459955 |
| title_full |
TESS first look at evolved compact pulsators: Asteroseismology of the pulsating helium-atmosphere white dwarf TIC 257459955 |
| title_fullStr |
TESS first look at evolved compact pulsators: Asteroseismology of the pulsating helium-atmosphere white dwarf TIC 257459955 |
| title_full_unstemmed |
TESS first look at evolved compact pulsators: Asteroseismology of the pulsating helium-atmosphere white dwarf TIC 257459955 |
| title_sort |
TESS first look at evolved compact pulsators: Asteroseismology of the pulsating helium-atmosphere white dwarf TIC 257459955 |
| dc.creator.none.fl_str_mv |
Bell, Keaton Corsico, Alejandro Hugo Bischoff Kim, Agnès Althaus, Leandro Gabriel Bradley, Paul Calcaferro, Leila Magdalena Montgomery, Michael Uzundag, Murat Baran, Andrzej Bognár, Zsófia Charpinet, Stéphane Ghasemi, Hamed Hermes, J. J. |
| author |
Bell, Keaton |
| author_facet |
Bell, Keaton Corsico, Alejandro Hugo Bischoff Kim, Agnès Althaus, Leandro Gabriel Bradley, Paul Calcaferro, Leila Magdalena Montgomery, Michael Uzundag, Murat Baran, Andrzej Bognár, Zsófia Charpinet, Stéphane Ghasemi, Hamed Hermes, J. J. |
| author_role |
author |
| author2 |
Corsico, Alejandro Hugo Bischoff Kim, Agnès Althaus, Leandro Gabriel Bradley, Paul Calcaferro, Leila Magdalena Montgomery, Michael Uzundag, Murat Baran, Andrzej Bognár, Zsófia Charpinet, Stéphane Ghasemi, Hamed Hermes, J. J. |
| author2_role |
author author author author author author author author author author author author |
| dc.subject.none.fl_str_mv |
ASTEROSEISMOLOGY STARS: OSCILLATIONS STARS: VARIABLES: GENERAL WHITE DWARFS |
| topic |
ASTEROSEISMOLOGY STARS: OSCILLATIONS STARS: VARIABLES: GENERAL WHITE DWARFS |
| purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.7 https://purl.org/becyt/ford/1 |
| dc.description.none.fl_txt_mv |
Context. Pulsation frequencies reveal the interior structures of white dwarf stars, shedding light on the properties of these compact objects that represent the final evolutionary stage of most stars. Two-minute cadence photometry from the Transiting Exoplanet Survey Satellite (TESS) records pulsation signatures from bright white dwarfs over the entire sky. Aims. As part of a series of first-light papers from TESS Asteroseismic Science Consortium Working Group 8, we aim to demonstrate the sensitivity of TESS data, by measuring pulsations of helium-atmosphere white dwarfs in the DBV instability strip, and what asteroseismic analysis of these measurements can reveal about their stellar structures. We present a case study of the pulsating DBV WD 0158-160 that was observed as TIC 257459955 with the two-minute cadence for 20.3 days in TESS Sector 3. Methods. We measured the frequencies of variability of TIC 257459955 with an iterative periodogram and prewhitening procedure. The measured frequencies were compared to calculations from two sets of white dwarf models to constrain the stellar parameters: the fully evolutionary models from LPCODE and the structural models from WDEC. Results. We detected and measured the frequencies of nine pulsation modes and eleven combination frequencies of WD 0158-160 to ∼0.01 μHz precision. Most, if not all, of the observed pulsations belong to an incomplete sequence of dipole (ℓ = 1) modes with a mean period spacing of 38.1 ± 1.0 s. The global best-fit seismic models from both LPCODE and WDEC have effective temperatures that are ≥ 3000 K hotter than archival spectroscopic values of 24 100-25 500 K; however, cooler secondary solutions are found that are consistent with both the spectroscopic effective temperature and distance constraints from Gaia astrometry. Conclusions. Our results demonstrate the value of the TESS data for DBV white dwarf asteroseismology. The extent of the short-cadence photometry enables reliably accurate and extremely precise pulsation frequency measurements. Similar subsets of both the LPCODE and WDEC models show good agreement with these measurements, supporting that the asteroseismic interpretation of DBV observations from TESS is not dominated by the set of models used. However, given the sensitivity of the observed set of pulsation modes to the stellar structure, external constraints from spectroscopy and/or astrometry are needed to identify the best seismic solutions. Fil: Bell, Keaton. Max planck institut Für Sonnensystemforschung; Alemania. University Aarhus; Dinamarca Fil: Corsico, Alejandro Hugo. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina Fil: Bischoff Kim, Agnès. Penn State Worthington Scranton; Estados Unidos Fil: Althaus, Leandro Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina Fil: Bradley, Paul. Los Alamos National Laboratory; Estados Unidos Fil: Calcaferro, Leila Magdalena. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina Fil: Montgomery, Michael. University of Texas at Austin; Estados Unidos Fil: Uzundag, Murat. Universidad de Valparaíso; Chile Fil: Baran, Andrzej. Uniwersytet Pedagogiczny; Polonia Fil: Bognár, Zsófia. Mta Csfk Lendület Near-field Cosmology Research Group; Hungría. Mta Research Centre For Astronomy. Konkoly Observatory; Hungría Fil: Charpinet, Stéphane. Université de Toulouse; Francia. Centre National de la Recherche Scientifique; Francia Fil: Ghasemi, Hamed. Institute For Advanced Studies In Basic Sciences; Irán Fil: Hermes, J. J.. Boston University; Estados Unidos |
| description |
Context. Pulsation frequencies reveal the interior structures of white dwarf stars, shedding light on the properties of these compact objects that represent the final evolutionary stage of most stars. Two-minute cadence photometry from the Transiting Exoplanet Survey Satellite (TESS) records pulsation signatures from bright white dwarfs over the entire sky. Aims. As part of a series of first-light papers from TESS Asteroseismic Science Consortium Working Group 8, we aim to demonstrate the sensitivity of TESS data, by measuring pulsations of helium-atmosphere white dwarfs in the DBV instability strip, and what asteroseismic analysis of these measurements can reveal about their stellar structures. We present a case study of the pulsating DBV WD 0158-160 that was observed as TIC 257459955 with the two-minute cadence for 20.3 days in TESS Sector 3. Methods. We measured the frequencies of variability of TIC 257459955 with an iterative periodogram and prewhitening procedure. The measured frequencies were compared to calculations from two sets of white dwarf models to constrain the stellar parameters: the fully evolutionary models from LPCODE and the structural models from WDEC. Results. We detected and measured the frequencies of nine pulsation modes and eleven combination frequencies of WD 0158-160 to ∼0.01 μHz precision. Most, if not all, of the observed pulsations belong to an incomplete sequence of dipole (ℓ = 1) modes with a mean period spacing of 38.1 ± 1.0 s. The global best-fit seismic models from both LPCODE and WDEC have effective temperatures that are ≥ 3000 K hotter than archival spectroscopic values of 24 100-25 500 K; however, cooler secondary solutions are found that are consistent with both the spectroscopic effective temperature and distance constraints from Gaia astrometry. Conclusions. Our results demonstrate the value of the TESS data for DBV white dwarf asteroseismology. The extent of the short-cadence photometry enables reliably accurate and extremely precise pulsation frequency measurements. Similar subsets of both the LPCODE and WDEC models show good agreement with these measurements, supporting that the asteroseismic interpretation of DBV observations from TESS is not dominated by the set of models used. However, given the sensitivity of the observed set of pulsation modes to the stellar structure, external constraints from spectroscopy and/or astrometry are needed to identify the best seismic solutions. |
| publishDate |
2019 |
| dc.date.none.fl_str_mv |
2019-11-26 |
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info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
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article |
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publishedVersion |
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http://hdl.handle.net/11336/125374 Bell, Keaton; Corsico, Alejandro Hugo; Bischoff Kim, Agnès; Althaus, Leandro Gabriel; Bradley, Paul; et al.; TESS first look at evolved compact pulsators: Asteroseismology of the pulsating helium-atmosphere white dwarf TIC 257459955; EDP Sciences; Astronomy and Astrophysics; 632; A42; 26-11-2019; 1-13 0004-6361 CONICET Digital CONICET |
| url |
http://hdl.handle.net/11336/125374 |
| identifier_str_mv |
Bell, Keaton; Corsico, Alejandro Hugo; Bischoff Kim, Agnès; Althaus, Leandro Gabriel; Bradley, Paul; et al.; TESS first look at evolved compact pulsators: Asteroseismology of the pulsating helium-atmosphere white dwarf TIC 257459955; EDP Sciences; Astronomy and Astrophysics; 632; A42; 26-11-2019; 1-13 0004-6361 CONICET Digital CONICET |
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eng |
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eng |
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EDP Sciences |
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