Now showing items 1-6 of 6

    • Direct observations of plasma upflows and condensation in a catastrophically cooling solar transition region loop 

      Orange, Norton B.; Chesny, David L.; Oluseyi, Hakeem M.; Hesterly, Katie; Patel, M.; Champey, Patrick (2013-12-01)
      Minimal observational evidence exists for fast transition region (TR) upflows in the presence of cool loops. Observations of such occurrences challenge notions of standard solar atmospheric heating models as well as ...
    • Dynamic flaring non-potential fields on quiet sun networks scales 

      Chesny, David L.; Oluseyi, Hakeem M.; Orange, Norton B. (2016-05-06)
      We report on the identification of dynamic flaring non-potential structures on quiet Sun (QS) supergranular network scales. Data from the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory allow for the ...
    • Exploring the variable sky with linear. II. Halo structure and substructure traced by RR Lyrae Stars to 30 kpc 

      Sesar, Branimir; Ivezic, Zeljko; Stuart, J. Scott; Morgan, Dylan M.; Becker, Andrew C.; Sharma, Sanjib; Palaversa, Lovro; Juric, Mario; Wozniak, Przemyslaw; Oluseyi, Hakeem M. (2013-08)
      We present a sample of ∼5000 RR Lyrae stars selected from the recalibrated LINEAR data set and detected at heliocentric distances between 5 kpc and 30 kpc over ∼8000 deg2 of sky. The coordinates and light curve properties, ...
    • Exploring the variable sky with LINEAR. III. Classification of periodic light curves 

      Palaversa, Lovro; Ivezić, Željko; Eyer, Laurent; Ruždjak, Domagoj; Sudar, Davor; Galin, Mario; Kroflin, Andrea; Mesarić, Martina; Munk, Petra; Oluseyi, Hakeem M. (2013-10)
      We describe the construction of a highly reliable sample of ∼7000 optically faint periodic variable stars with light curves obtained by the asteroid survey LINEAR across 10,000 deg2 of the northern sky. The majority of ...
    • Non-potential fields in the quiet Sun network: extreme-ultraviolet and magnetic footpoint observations 

      Chesny, David L.; Oluseyi, Hakeem M.; Orange, Norton B. (2013-11-20)
      The quiet Sun (QS) magnetic network is known to contain dynamics which are indicative of non-potential fields. Non-potential magnetic fields forming “S-shaped” loop arcades can lead to the breakdown of static activity and ...
    • Simulated LSST survey of RR lyrae stars throughout the local group 

      Becker, Andrew C.; Culliton, Christopher; Furqan, Muhammad; Hoadley, Keri L.; Regencia, Paul; Wells, Akeem J.; Ivezic, Zeljko; Jones, R. Lynne; Krughoff, K. Simon; Oluseyi, Hakeem M. (2012-07)
      We report on a study to determine the efficiency of the Large Synoptic Survey Telescope (LSST) to recover the periods, brightnesses, and shapes of RR Lyrae stars’ light curves in the volume extending to heliocentric distances ...