Zobrazeno 1 - 10
of 86
pro vyhledávání: '"Pulsacoes estelares"'
Autor:
Uzundag, Murat, Córsico, Alejandro Hugo, Kepler, Souza Oliveira, Althaus, Leandro Gabriel, Werner, Klaus, Reindl, Nicole, Vuckovic, Maja
Publikováno v:
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
We present two new GW Vir-type pulsating white dwarf stars, TIC 0403800675 (WD J115727.68-280349.64) and TIC 1989122424 (WD J211738.38-552801.18) discovered in the Transiting Exoplanet Survey Satellite (TESS) photometric data. For both stars, the TES
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::81ccd2770e02a6f2e6a5984bde138e4f
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
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
https://hal-insu.archives-ouvertes.fr/insu-03672023/file/stac093.pdf
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 510, 1, pp. 858-869
Monthly Notices of the Royal Astronomical Society, 510, 858-869
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Monthly Notices of the Royal Astronomical Society, 510, 858-869
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Pulsating low-mass white dwarf stars are white dwarfs with stellar masses between 0.30~M$_{\odot}$ and 0.45~M$_{\odot}$ that show photometric variability due to gravity-mode pulsations. Within this mass range, they can harbour both a helium- and hybr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0185389dbd7307e0f92068b7bcef8e4b
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
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
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
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
http://hdl.handle.net/2066/239752
Autor:
Romero, Alejandra Daniela, Amaral, Larissa Antunes, Kepler, Souza Oliveira, Fraga, Luciano, Kurtz, Donald W., Shibahashi, Hiromoto
Publikováno v:
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
We report the detection of periodic variations on the Teff 32 000 K DA white dwarf star HE 1017−1352. We obtained time series photometry using the 4.1-m Southern Astrophysical Research telescope on three separate nights for a total of 16.8 h. From
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::e199c660932abed9bb14ee8003f14781
Autor:
María E. Camisassa, Leandro Gabriel Althaus, Andrzej S. Baran, M. Vučković, Francisco C. De Gerónimo, Roberto Silvotti, Alejandro H. Córsico, Leila M. Calcaferro, Murat Uzundag, Keaton J. Bell, Souza Oliveira Kepler
Publikováno v:
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
The possible existence of warm ($T_{\rm eff}\sim19\,000$ K) pulsating DA white dwarf (WD) stars, hotter than ZZ Ceti stars, was predicted in theoretical studies more than 30 yr ago. However, to date, no pulsating warm DA WD has been discovered. We re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3bcebc02f0e1dc353aa96b20980854f2
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
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
https://doi.org/10.1051/0004-6361/202039202
Autor:
Ingrid Domingos Pelisoli, Leandro Gabriel Althaus, Alejandra D. Romero, Alejandro H. Córsico, Souza Oliveira Kepler
Publikováno v:
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
The blue large-amplitude pulsators (BLAPs) constitute a new class of pulsating stars. They are hot stars with effective temperatures of ∼30 000 K and surface gravities of log g ∼ 4.9, that pulsate with periods in the range 20−40 min. Until now,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a6c7edd135e30db549f66e233ffbf479
Autor:
Alejandro H. Córsico, Leandro Gabriel Althaus, Alejandra D. Romero, Souza Oliveira Kepler, Francisco C. De Gerónimo
Publikováno v:
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
The thermally pulsing phase on the asymptotic giant branch (TP-AGB) is the last nuclear burning phase experienced by most of low and intermediate mass stars. During this phase, the outer chemical stratification above the C/O core of the emerging whit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::50a4374c80e2b0ba1fa9a03a024ddcfa