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URI: http://hdl.handle.net/2144/1177

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  • A catalog of cool dwarf targets for the Transiting Exoplanet Survey Satellite 

    Muirhead, Philip S.; Dressing, Courtney D.; Mann, Andrew W.; Rojas-Ayala, Barbara; Lepine, Sebastien; Paegert, Martin; De Lee, Nathan; Oelkers, Ryan (IOP PUBLISHING LTD, 2018-04-01)
    We present a catalog of cool dwarf targets (V−J > 2.7, T eff ≲ 4000K) and their stellar properties for the upcoming Transiting Exoplanet Survey Satellite (TESS), for the purpose of determining which cool dwarfs should be ...
  • Proper motion of the faint star near KIC 8462852 (Boyajian's Star)-not a binary system 

    Clemens, Dan P.; Maheshwari, Kush; Jagani, Roshan; Montgomery, J.; El Batal, A.M.; Ellis, T.G.; Wright, J.T. (IOP PUBLISHING LTD, 2018-03-20)
    A faint star located 2 arcsec from KIC 8462852 was discovered in Keck 10 m adaptive optics imaging in the JHK near-infrared (NIR) in 2014 by Boyajian et al. (2016). The closeness of the star to KIC 8462852 suggested that ...
  • LHS 1610A: a nearby mid-M dwarf with a companion that is likely a brown dwarf 

    Winters, Jennifer G.; Irwin, Jonathan; Newton, Elisabeth R.; Charbonneau, David; Latham, David W.; Han, Eunkyu; Muirhead, Philip S.; Berlind, Perry; Calkins, Michael L.; Esquerdo, Gil (IOP PUBLISHING LTD, 2018-03-01)
    We present the spectroscopic orbit of LHS 1610A, a newly discovered single-lined spectroscopic binary with a trigonometric distance placing it at 9.9 ± 0.2 pc. We obtained spectra with the TRES instrument on the 1.5 m ...
  • Space Physics Concepts for Graduate Students: An Activities Based Approach 

    Gross, N.A.; Arge, N.; Bruntz, R.; Burns, A.G.; Hughes, W.J.; Knipp, D.; Lyon, J.; McGregor, S.; Owens, M.; Siscoe, G.
    The geospace environment is controlled largely by events on the Sun, such as solar flares and coronal mass ejections, which generate significant geomagnetic and upper atmospheric disturbances. The study of this Sun‐Earth ...
  • Formation of plasma around a small meteoroid: 2. Implications for radar head echo 

    Dimant, Y.S.; Oppenheim, M.M. (AMER GEOPHYSICAL UNION, 2017-04-01)
    This paper calculates the spatial distribution of the plasma responsible for radar head echoes by applying the kinetic theory developed in the companion paper. This results in a set of analytic expressions for the plasma ...
  • Generation of electric fields and currents by neutral flows in weakly ionized plasmas through collisional dynamos 

    Dimant, Y.S.; Oppenheim, M.M.; Fletcher, A.C. (AMER INST PHYSICS, 2016-08-01)
    In weakly ionized plasmas neutral flows drag plasma across magnetic field lines generating intense electric fields and currents. An example occurs in the Earth's ionosphere near the geomagnetic equator. Similar processes ...
  • Hybrid simulations of coupled Farley-Buneman/gradient drift instabilities in the equatorial E region ionosphere 

    Young, Matthew A.; Oppenheim, Meers M.; Dimant, Yakov S. (AMER GEOPHYSICAL UNION, 2017-05-01)
    Plasma irregularities in the equatorial E region ionosphere are classified as Type I or Type II, based on coherent radar spectra. Type I irregularities are attributed to the Farley‐Buneman instability and Type II to the ...
  • Photoelectron-induced waves: A likely source of 150 km radar echoes and enhanced electron modes 

    Oppenheim, Meers M.; Dimant, Yakov S. (AMER GEOPHYSICAL UNION, 2016-04-28)
    VHF radars near the geomagnetic equator receive coherent reflections from plasma density irregularities between 130 and 160 km in altitude during the daytime. Though researchers first discovered these 150 km echoes over ...
  • Effects of electrojet turbulence on a magnetosphere-ionosphere simulation of a geomagnetic storm 

    Wiltberger, M.; Merkin, V.; Zhang, B.; Toffoletto, F.; Oppenheim, M.; Wang, W.; Lyon, J.G.; Liu, J.; Dimant, Y.; Sitnov, M.I.; Stephens, G.K. (AMER GEOPHYSICAL UNION, 2017-05-01)
    Ionospheric conductance plays an important role in regulating the response of the magnetosphere‐ionosphere system to solar wind driving. Typically, models of magnetosphere‐ionosphere coupling include changes to ionospheric ...
  • Formation of plasma around a small meteoroid: 1. Kinetic theory 

    Dimant, Y.S.; Oppenheim, Meers M. (AMER GEOPHYSICAL UNION, 2017-04-01)
    This paper calculates the spatial distribution of the plasma responsible for radar head echoes by applying the kinetic theory developed in the companion paper. This results in a set of analytic expressions for the plasma ...

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