Discovery of 74 new bright ZZ Ceti stars in the first three years of TESS

Autor: Alejandra D Romero, S O Kepler, J J Hermes, Larissa Antunes Amaral, Murat Uzundag, Zsófia Bognár, Keaton J Bell, Madison VanWyngarden, Andy Baran, Ingrid Pelisoli, Gabriela da Rosa Oliveira, Detlev Koester, T S Klippel, Luciano Fraga, Paul A Bradley, Maja Vučković, Tyler M Heintz, Joshua S Reding, B C Kaiser, Stéphane Charpinet

Publikováno v: Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, 2022, 511, pp.1574-1590. ⟨10.1093/mnras/stac093⟩
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS

We report the discovery of 74 new pulsating DA white dwarf stars, or ZZ Cetis, from the data obtained by the Transiting Exoplanet Survey Satellite (TESS) mission, from Sectors 1 to 39, corresponding to the first 3 cycles. This includes objects from t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2cb2f3649c84b4cb3d22baa31d245d13
https://hal-insu.archives-ouvertes.fr/insu-03672023/file/stac093.pdf

The pulsating helium-atmosphere white dwarfs : I. New DBVs from the Sloan Digital Sky Survey

Autor: Vanderbosch, Zachary, Hermes, James J., Winget, Donald Earl, Montgomery, Michael Houston, Bell, Keaton, Nitta, Atsuko, Kepler, Souza Oliveira

Publikováno v: Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS

We present a dedicated search for new pulsating helium-atmosphere (DBV) white dwarfs from the Sloan Digital Sky Survey using the McDonald 2.1 m Otto Struve Telescope. In total we observed 55 DB and DBA white dwarfs with spectroscopic temperatures bet

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______3056::addaffb7ce5a5d4a3cad390edccb02b2

Pulsating hydrogen-deficient white dwarfs and pre-white dwarfs observed with TESS. II. Discovery of two new GW Vir stars: TIC 333432673 and TIC 095332541

Autor: Maja Vučković, G. O. da Rosa, M. Uzundag, Keaton J. Bell, A. H. Córsico, Souza Oliveira Kepler, N. Reindl, Alina G. Istrate, Michael Higgins, Leandro Gabriel Althaus, Klaus Werner

Publikováno v: Astronomy & Astrophysics, 655, 1-12
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Astronomy & Astrophysics, 655, pp. 1-12

Context. The Transiting Exoplanet Survey Satellite (TESS) mission is revolutionizing the blossoming area of asteroseismology, particularly of pulsating white dwarfs and pre-white dwarfs, thus continuing the impulse of its predecessor, the Kepler miss

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d280c027d92cda65f9b6e66ce7e71c40
http://hdl.handle.net/2066/239752

Pulsating hydrogen-deficient white dwarfs and pre-white dwarfs observed with TESS

Autor: Leandro Gabriel Althaus, Murat Uzundag, Klaus Werner, Andrzej S. Baran, Keaton J. Bell, Roberto Silvotti, Alejandro H. Córsico, Michael Higgins, M. Vučković, Souza Oliveira Kepler

Publikováno v: Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS

Context. The recent arrival of continuous photometric observations of unprecedented quality from space missions has strongly promoted the study of pulsating stars and caused great interest in the stellar astrophysics community. In the particular case

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::247c131c973c57a8ff6c24069cc25862
https://doi.org/10.1051/0004-6361/202039202

The solar twin planet search : the age-chromospheric activity relation

Autor: Lorenzo-Oliveira, Diego, Freitas, Fabrício Catani de, Meléndez, Jorge, Bedell, Megan, Ramírez, Iván, Bean, Jacob L., Asplund, Martin, Spina, Lorenzo, Dreizler, Stefan, Alves-Brito, Alan, Casagrande, Luca

Publikováno v: Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS

Context. It is well known that the magnetic activity of solar-type stars decreases with age, but it is widely debated in the literature whether there is a smooth decline or if there is an early sharp drop until 1–2 Gyr that is followed by a relativ

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______3056::033b3bc6a5df51f3ce2ae9371a0f8cfe