Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Nitta, Atsuko"'
Autor:
Elms, Abbigail K., Tremblay, Pier-Emmanuel, Gänsicke, Boris T., Swan, Andrew, Melis, Carl, Bédard, Antoine, Manser, Christopher J., Munday, James, Hermes, J. J., Dennihy, Erik, Nitta, Atsuko, Zuckerman, Ben
Two recently discovered white dwarfs, WDJ041246.84$+$754942.26 and WDJ165335.21$-$100116.33, exhibit H$\alpha$ and H$\beta$ Balmer line emission similar to stars in the emerging DAHe class, yet intriguingly have not been found to have detectable magn
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a2a78a6e98f21b740fc8e210b85ad78d
Autor:
Córsico, Alejandro Hugo, Uzundag, Murat, Kepler, Souza Oliveira, Silvotti, Roberto, Althaus, Leandro Gabriel, Koester, Detlev, Baran, Andrzej, Bell, Keaton, Bischoff-Kim, Agnès, Hermes, James J., Kawaler, Steven D., Provencal, Judith L., Winget, Donald Earl, Montgomery, Michael Houston, Bradley, Paul A., Kleinman, Scot James, Nitta, Atsuko
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 collection of high-quality photometric data by space telescopes, such as the completed Kepler mission and the ongoing TESS program, is revolutionizing the area of white-dwarf asteroseismology. Among the different kinds of pulsating white
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::d524ace0c836a9ccf66996a5472919c7
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:
C��rsico, Alejandro H., Uzundag, Murat, Kepler, S. O., Silvotti, Roberto, Althaus, Leandro G., Koester, Detlev, Baran, Andrzej S., Bell, Keaton J., Bischoff-Kim, Agn��s, Hermes, J. J., Kawaler, Steve D., Provencal, Judith L., Winget, Don E., Montgomery, Michael H., Bradley, Paul A., Kleinman, S. J., Nitta, Atsuko
The collection of high-quality photometric data by space telescopes is revolutionizing the area of white-dwarf asteroseismology. Among the different kinds of pulsating white dwarfs, there are those that have He-rich atmospheres, and they are called D
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ab14ccb5396cd3945201776d15a9f90
http://arxiv.org/abs/2111.15551
http://arxiv.org/abs/2111.15551
Autor:
Kepler, Souza Oliveira, Pelisoli, Ingrid Domingos, Jordan, Stefan, Kleinman, Scot James, Koester, Detlev, Kulebi, Baybars, Antonio, Viviane Peçanha, Castanheira, Bárbara Garcia, Nitta, Atsuko, Costa, Jose Eduardo da Silveira, Winget, Donald Earl, Kanaan Neto, Antonio Nemer, Fraga, Luciano
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
To obtain better statistics on the occurrence of magnetism among white dwarfs, we searched the spectra of the hydrogen atmosphere white dwarf stars (DAs) in the Data Release 7 of the Sloan Digital Sky Survey (SDSS) for Zeeman splittings and estimated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::ee63ae69d1ae8ac7126435d2dfa75130
Autor:
Kleinman, Scot James, Kepler, Souza Oliveira, Koester, Detlev, Pelisoli, Ingrid Domingos, Antonio, Viviane Peçanha, Nitta, Atsuko, Costa, Jose Eduardo da Silveira, Krzesinski, Jerzy, Dufour, Patrick, Lachapelle, François-René, Bergeron, Pierre, Yip, Ching-Wa, Harris, Hugh C., Eisenstein, Daniel, J., Althaus, Leandro Gabriel, Córsico, Alejandro Hugo
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 new catalog of spectroscopically confirmed white dwarf stars from the Sloan Digital Sky Survey (SDSS) Data Release 7 spectroscopic catalog. We find 20,407 white dwarf spectra, representing 19,712 stars, and provide atmospheric model fits
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::3383f35aca37bff65887e37d56da65c0
Autor:
Kepler, Souza Oliveira, Pelisoli, Ingrid Domingos, Antonio, Viviane Peçanha, Costa, Jose Eduardo da Silveira, Fraga, Luciano, Hermes, James J., Winget, Donald Earl, Castanheira, Bárbara Garcia, Córsico, Alejandro Hugo, Romero, Alejandra Daniela, Althaus, Leandro Gabriel, Kleinman, Scot James, Nitta, Atsuko
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 our observations of the new pulsating hydrogen atmosphere white dwarf SDSS J132350.28+010304.22. We discovered periodic photometric variations in frequency and amplitude that are commensurate with nonradial g-mode pulsations in ZZ Ceti star
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::c2ce92e8475464b61db4c3d7b890d799
Autor:
Schiavon, Ricardo P., Adamson, Andy, Chiboucas, Kristin, Diaz, Ruben, Geballe, Tom, Gimeno, German, Gomez, Percy, Hibon, Pascale, Hirst, Paul, Jorgensen, Inger, Labrie, Kathleen, Leggett, Sandy, Lemoine-Busserolle, Marie, Levenson, Nancy, Mason, Rachel, McDermid, Richard, Miller, Bryan, Nitta, Atsuko, Pessev, Peter, Rodgers, Bernadette, Schirmer, Mischa, Trujillo, Chad, Turner, James
This paper is a response to a call for white papers solicited by Gemini Observatory and its Science and Technology Advisory Committee, to help define the science case and requirements for a new Gemini instrument, envisaged to consist of a single-obje
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aded02f534d7d32a163eade4a3ef493d
Autor:
Redaelli, Maurício, Kepler, Souza Oliveira, Costa, Jose Eduardo da Silveira, Winget, Donald Earl, Handler, Gerald, Castanheira, Bárbara Garcia, Kanaan Neto, Antonio Nemer, Fraga, Luciano, Henrique, P., Giovannini Junior, Odilon, Provencal, Judith L., Shipman, Harry L., Dalessio, J., Thompson, S. E., Mullally, Fergal, Brewer, M. M., Childers, D., Oksala, M. E., Rosen, Rachel, Wood, Matthew A., Reed, M. D., Walter, B., Strickland, Willie, Chandler, Dean W., Watson, Todd K., Nather, R. Edward, Montgomery, Michael Houston, Bischoff-Kim, Agnès, Hansen, Carl J., Nitta, Atsuko, Kleinman, Scot James, Claver, C.F., Brown, Tim, Sullivan, Denis J., Kim, Seung-Lee, Chen, Wen-Ping, Yang, M., Shih, Chia-You, Zhang, X, Jiang, Xiaojun, Fu, Jianning Ning, Seetha, S., Ashoka, B.N., Marar, T.M. Krishnan, Baliyan, Kiran S., Vats, Hari Om, Chernyshev, A.V., Ibbetson, Peter A., Leibowitz, Elia M., Hemar, Shirley, Sergeev, A., Andreev, M., Janulis, Rimvydas, Meistas, Edmundas G., Moskalik, Pawel, Pajdosz, Gabriel, Baran, Andrzej, Winiarski, M., Zola, Staszek, Ogloza, Waldemar, Siwak, Michal, Bognár, Zsófia, Solheim, Jan-Eric, Sefako, R., Buckley, David A.H., O'Donoghue, Darragh, Nagel, Thorsten, Silvotti, Roberto, Bruni, I., Fremy, J. R., Vauclair, Gérard, Chevreton, Michel, Dolez, Noël, Pfeiffer, Ben, Barstow, Martin A., Creevey, o, Kawaler, Steven D., Clemens, J. Christopher
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
PG 1351+489 is one of the 20DBVs – pulsating helium-atmospherewhite dwarf stars – known and has the simplest power spectrum for this class of star, making it a good candidate to study cooling rates. We report accurate period determinations for th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::d03745808ee70215fb9b16872abad91c
Autor:
Castanheira, Bárbara Garcia, Kepler, Souza Oliveira, Kleinman, Scot James, Nitta, Atsuko, Fraga, Luciano
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
Using the The SOuthern Astrophysical Research (SOAR) 4.1-m telescope, we report on the discovery of low amplitude pulsations for three stars previously reported as not-observed-tovary (NOV) by Mukadam et al. and Mullally et al., which are inside the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::3c97bd1e6305736b4c9b3881c3b77a53