Navegação Ciências Exatas e da Terra por Autor "Winget, K. I."

Resultados 1-4 de 4

    • Four new massive pulsating white dwarfs including an ultramassive DAV 

      Curd, Brandon; Gianninas, Alexandros; Bell, Keaton; Kilic, Mukremin; Romero, Alejandra Daniela; Allende Prieto, Carlos; Winget, Donald Earl; Winget, K. I. (2017) [Artigo de periódico]
      We report the discovery of four massive (M > 0.8M ) ZZ Ceti white dwarfs, including an ultramassive 1.16M star. We obtained ground-based, time series photometry for 13 white dwarfs from the Sloan Digital Sky Survey Data ...

    • Measuring the evolutionay rate of cooling of ZZ Ceti 

      Mukadam, Anjum Shagufta; Bischoff-Kim, Agnès; Fraser, Oliver; Córsico, Alejandro Hugo; Montgomery, Michael Houston; Kepler, Souza Oliveira; Romero, Alejandra Daniela; Kronberg, M. E.; Winget, K. I.; Falcon, Ross E.; Chandler, Dean W.; Kuehne, J. W.; Sullivan, Denis J.; Reaves, David Earl; Von Hippel, Theodore A.; Mullally, Fergal; Shipman, Harry L.; Thompson, S. E.; Silvestri, Nicole M.; Hynes, R. I. (2013) [Artigo de periódico]
      We have finally measured the evolutionary rate of cooling of the pulsating hydrogen atmosphere (DA) white dwarf ZZ Ceti (Ross 548), as reflected by the drift rate of the 213.13260694 s period. Using 41 yr of time-series ...

    • Photometric variability in a warm, strongly magnetic DQ white dwarf, SDSS J103655.39+652252.2 

      Williams, Kurtis; Winget, Donald Earl; Montgomery, Michael Houston; Dufour, Patrick; Kepler, Souza Oliveira; Hermes, James J.; Falcon, Ross E.; Winget, K. I.; Bolte, Michael; Rubin, Kate H. R.; Liebert, James (2013) [Artigo de periódico]
      We present the discovery of photometric variability in the DQ white dwarf SDSS J103655.39+652252.2 (SDSS J1036+6522). Time-series photometry reveals a coherent monoperiodic modulation at a period of 1115.64751(67) s with ...

    • The McDonald Observatory search for pulsating sdA stars : asteroseismic support for multiple populations 

      Bell, Keaton; Pelisoli, Ingrid Domingos; Kepler, Souza Oliveira; Brown, Warren R.; Winget, Donald Earl; Winget, K. I.; Vanderbosch, Zachary; Castanheira, Bárbara Garcia; Hermes, James J.; Montgomery, Michael Houston; Koester, Detlev (2018) [Artigo de periódico]
      Context. The nature of the recently identified “sdA” spectroscopic class of stars is not well understood. The thousands of known sdAs have H-dominated spectra, spectroscopic surface gravity values between main sequence ...