Browsing Exact and Earth Sciences by Author "Pelisoli, Ingrid Domingos"

Now showing items 1-20 of 21

    • Comparing the asteroseismic properties of pulsating pre-extremely low mass white dwarf and δ Scuti stars 

      Sánchez Arias, J. P.; Romero, Alejandra Daniela; Córsico, Alejandro Hugo; Pelisoli, Ingrid Domingos; Antoci, Victoria L.; Kepler, Souza Oliveira; Althaus, Leandro Gabriel; Corti, Mariela Alejandra (2018) [Journal article]
      Context. Pulsating extremely low-mass pre-white dwarf stars (pre-ELMV), with masses between ~0.15 M⊙ and ~0.30 M⊙, constitute a new class of variable stars showing g- and possibly p-mode pulsations with periods between 320 ...

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

      Romero, Alejandra Daniela; Kepler, Souza Oliveira; Hermes, James J.; Amaral, Larissa Antunes; Uzundag, Murat; Bognár, Zsófia; Bell, Keaton; Vanwyngarden, Madison; Baran, Andy; Pelisoli, Ingrid Domingos; Rosa, Gabriela Oliveira da; Koester, Detlev; Klippel, Theylor Schumacher; Fraga, Luciano; Bradley, Paul A.; Vuckovic, Maja; Heintz, Tyler M.; Reding, Joshua S.; Kaiser, B. C.; Charpinet, Stéphane (2022) [Journal article]
      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 mission, from Sectors 1 to 39, corresponding to the first 3 cycles. This ...

    • Ground-based observation of ZZ Ceti stars and the discovery of four new variables 

      Romero, Alejandra Daniela; Amaral, Larissa Antunes; Klippel, Theylor Schumacher; Sanmartim, David; Fraga, Luciano; Ourique, Gustavo; Pelisoli, Ingrid Domingos; Ramos, Gabriel Lauffer; Kepler, Souza Oliveira; Koester, Detlev (2019) [Journal article]
      We perform ground-based photometric observations of 22 DA white dwarf stars, 10 already known ZZ Cetis and 12 candidates with atmospheric parameters inside the classical instability strip. We report on the discovery of ...

    • Magnetic white dwarf stars in the Sloan Digital Sky Survey 

      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 (2013) [Journal article]
      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 ...

    • Mysterious, variable, and extremely hot : white dwarfs showing ultra-high excitation lines : I. Photometric variability 

      Reindl, Nicole; Schaffenroth, Veronika; Filiz, Semih; Geier, Stephan; Pelisoli, Ingrid Domingos; Kepler, Souza Oliveira (2021) [Journal article]
      Context. About 10% of all stars exhibit absorption lines of ultra-highly excited (UHE) metals (e.g., O viii) in their optical spectra when entering the white dwarf cooling sequence. This is something that has never been ...

    • New white dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 12 

      Kepler, Souza Oliveira; Pelisoli, Ingrid Domingos; Koester, Detlev; Ourique, Gustavo; Romero, Alejandra Daniela; Reindl, Nicole; Kleinman, Scot James; Eisenstein, Daniel, J.; Valois, Adeilton Dean Marques; Amaral, Larissa Antunes (2016) [Journal article]
      We report the discovery of 6576 new spectroscopically confirmed white dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 12. We obtain Teff, log g and mass for hydrogen atmospherewhite dwarf stars (DAs) ...

    • New white dwarf stars in the Sloan Digital Sky Survey Data Release 10 

      Kepler, Souza Oliveira; Pelisoli, Ingrid Domingos; Koester, Detlev; Ourique, Gustavo; Kleinman, Scot James; Romero, Alejandra Daniela; Nitta, Atsuko; Eisenstein, Daniel, J.; Costa, Jose Eduardo da Silveira; Kulebi, Baybars; Jordan, Stefan; Dufour, Patrick; Giommi, Paolo; Rebassa-Mansergas, Alberto (2015) [Journal article]
      We report the discovery of 9088 new spectroscopically confirmed white dwarfs and subdwarfs in the Sloan Digital Sky Survey Data Release 10. We obtain Teff, log g and mass for hydrogen atmosphere white dwarf stars (DAs) and ...

    • On the evolutionary status and pulsations of the recently discovered blue large-amplitude pulsators (BLAPs) 

      Romero, Alejandra Daniela; Córsico, Alejandro Hugo; Althaus, Leandro Gabriel; Pelisoli, Ingrid Domingos; Kepler, Souza Oliveira (2018) [Journal article]
      The blue large-amplitude pulsators (BLAPs) constitute a new class of pulsating stars. They are hot stars with effective temperatures of ~30 000K and surface gravities of log g ~ 4.9, that pulsate with periods in the range ...

    • Outliers : multicolour photometry guiding the search for evolved binary systems in the globular cluster 47Tucanae 

      Campos, Fabíola; Pelisoli, Ingrid Domingos; Kamann, Sebastian; Husser, Tim Oliver; Dreizler, Stefan; Bellini, Andrea; Robinson, E.L.; Nardiello, Domenico; Piotto, Giampaolo; Kepler, Souza Oliveira; Istrate, Alina G.; Winget, Donald Earl; Montgomery, Michael Houston; Dotter, Aaron Loveren (2018) [Journal article]
      We use Hubble Space Telescope multicolour photometry of the globular cluster 47 Tucanae to uncover a population of 24 objects with no previous classification that are outliers from the single-star model tracks in the ...

    • SDSS DR7 white dwarf catalog 

      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 (2013) [Journal article]
      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 ...

    • Seismology of a massive pulsating hydrogen atmosphere white dwarf 

      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 (2012) [Journal article]
      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 ...

    • The bright blue side of the night sky : Spectroscopic survey of bright and hot (pre-) white dwarfs 

      Reindl, Nicole; Islami, Ramazan; Werner, Klaus; Kepler, Souza Oliveira; Pritzkuleit, Max; Dawson, Harry; Dorsch, Matti; Istrate, Alina G.; Pelisoli, Ingrid Domingos; Geier, Stephan; Uzundag, Murat; Provencal, Judith L.; Justham, Stephen (2023) [Journal article]
      We report on the spectroscopic confirmation of 68 new bright (G = 13.5–17.2 mag) and blue (pre-)white dwarfs (WDs). This finding has allowed us to almost double the number of the hottest (Teff ≥ 60 kK) known WDs brighter ...

    • The frequency of gaseous debris discs around white dwarfs 

      Manser, Christopher; Gänsicke, Boris; Fusillo, Nicola Pietro Gentile; Ashley, Richard P.; Breedt, Elmé; Hollands, Mark; Izquierdo, Paula; Pelisoli, Ingrid Domingos (2020) [Journal article]
      A total of 1–3 per cent of white dwarfs are orbited by planetary dusty debris detectable as infrared emission in excess above the white dwarf flux. In a rare subset of these systems, a gaseous disc component is also detected ...

    • 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) [Journal article]
      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 ...

    • The sdA problem : III. New extremely low-mass white dwarfs and their precursors from Gaia astrometry 

      Pelisoli, Ingrid Domingos; Bell, Keaton; Kepler, Souza Oliveira; Koester, Detlev (2019) [Journal article]
      The physical nature of the sdA stars – cool hydrogen-rich objects with spectroscopic surface gravities intermediate between main-sequence and canonical-mass white dwarfs – has been elusive since they were found in Sloan ...

    • The sdA problem : II. Photometric and spectroscopic follow-up 

      Pelisoli, Ingrid Domingos; Kepler, Souza Oliveira; Koester, Detlev; Castanheira, Bárbara Garcia; Romero, Alejandra Daniela; Fraga, Luciano (2018) [Journal article]
      The spectral classification ‘subdwarfA’ (sdA) is given to stars showingH-rich spectra and submain- sequence surface gravities, but effective temperature lower than the zero-age horizontal branch. Their evolutionary origin ...

    • The sdA problem : I. Physical properties 

      Pelisoli, Ingrid Domingos; Kepler, Souza Oliveira; Koester, Detlev (2018) [Journal article]
      The so-called sdA stars are defined by having H-rich spectra and surface gravities similar to hot subdwarf stars, but effective temperature below the zero-age horizontal branch. Their evolutionary history is an enigma: ...

    • Unified line profiles for hydrogen perturbed by collisions with protons : satellites and asymmetries 

      Pelisoli, Ingrid Domingos; Santos, Marcio Gabriel dos; Kepler, Souza Oliveira (2015) [Journal article]
      We present new calculations of unified line profiles for hydrogen perturbed by collisions with protons. We report on new calculations of the potential energies and dipole moments which allow the evaluation of profiles for ...

    • White dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 14 

      Kepler, Souza Oliveira; Pelisoli, Ingrid Domingos; Koester, Detlev; Reindl, Nicole; Geier, Stephan; Romero, Alejandra Daniela; Ourique, Gustavo; Oliveira, Cristiane de Paula; Amaral, Larissa Antunes (2019) [Journal article]
      White dwarfs carry information on the structure and evolution of the Galaxy, especially through their luminosity function and initial-to-final mass relation. Very cool white dwarfs provide insight into the early ages of ...

    • White dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 16 

      Kepler, Souza Oliveira; Koester, Detlev; Pelisoli, Ingrid Domingos; Romero, Alejandra Daniela; Ourique, Gustavo (2021) [Journal article]
      White dwarfs are the end state of the evolution of more than 97 per cent of all stars, and therefore carry information on the structure and evolution of the Galaxy through their luminosity function and initial-to-final ...