• AGB stars in the early universe I: Towards a portable chemical and thermal evolution model 

    Liao, Andy Sha (2012)
    Stars in the asymptotic giant branch (AGB) are in the penultimate stage of their lives as low- mass dwarfs. During this stage, they produce in their cool, bloated envelopes vast quantities of dust composed from metals ...
  • AGN Host Galaxies At Redshift Z Approximate To 0.7: Peculiar Or Not? 

    Bohm, A.; Wisotzki, L.; Bell, E. F.; Jahnke, K.; Wolf, C.; Bacon, D.; Barden, M.; Gray, M. E.; Hoeppe, G.; Jogee, S.; McIntosh, D. H.; Peng, C. Y.; Robaina, A. R.; Balogh, M.; Barazza, F. D.; Caldwell, J. A. R.; Heymans, C.; Haussler, B.; van Kampen, E.; Lane, K.; Meisenheimer, K.; Sanchez, S. F.; Taylor, A. N.; Zheng, X. (2013-01)
    Aims. We perform a quantitative morphological comparison between the hosts of active galactic nuclei (AGN) and quiescent galaxies at intermediate redshifts (z approximate to 0.7). The imaging data are taken from the large ...
  • Almost All Of Kepler's Multiple-Planet Candidates Are Planets 

    Lissauer, Jack J.; Marcy, Geoffrey W.; Rowe, Jason F.; Bryson, Stephen T.; Adams, Elisabeth; Buchhave, Lars A.; Ciardi, David R.; Cochran, William D.; Fabrycky, D. C.; Ford, Eric B.; Fressin, Francois; Geary, John; Gilliland, Ronald L.; Holman, Matthew J.; Howell, Steve B.; Jenkins, Jon M.; Kinemuchi, Karen; Koch, David G.; Morehead, Robert C.; Ragozzine, Darin; Seader, Shawn E.; Tanenbaum, Peter G.; Torres, Guillermo; Twicken, Joseph D. (2012-05)
    We present a statistical analysis that demonstrates that the overwhelming majority of Kepler candidate multiple transiting systems (multis) indeed represent true, physically associated transiting planets. Binary stars ...
  • An Analysis Of The Environments Of Fu Orionis Objects With Herschel 

    Green, Joel D.; Evans, Neal J.; Kospal, Agnes; Herczeg, Gregory; Quanz, Sascha P.; Henning, Thomas; van Kempen, Tim A.; Lee, Jeong-Eun; Dunham, Michael M.; Meeus, Gwendolyn; Bouwman, Jeroen; Chen, Jo-Hsin; Gudel, Manuel; Skinner, Stephen L.; Liebhart, Armin; Merello, Manuel (2013-08)
    We present Herschel-HIFI, SPIRE, and PACS 50-670 mu m imaging and spectroscopy of six FU Orionis-type objects and candidates (FU Orionis, V1735 Cyg, V1515 Cyg, V1057 Cyg, V1331 Cyg, and HBC 722), ranging in outburst date ...
  • Analytical Light Curve Models Of Superluminous Supernovae: Chi(2)-Minimization Of Parameter Fits 

    Chatzopoulos, Emmanouil; Wheeler, J. Craig; Vinko, Jozsef; Horvath, Z. L.; Nagy, A. (2013-08)
    We present fits of generalized semi-analytic supernova (SN) light curve (LC) models for a variety of power inputs including Ni-56 and Co-56 radioactive decay, magnetar spin-down, and forward and reverse shock heating due ...
  • An Ancient Extrasolar System With Five Sub-Earth-Size Planets 

    Campante, T. L.; Barclay, Thomas; Swift, Jonathan J.; Huber, Daniel; Adibekyan, V. Z.; Cochran, William; Burke, C. J.; Isaacson, Howard; Quintana, Elisa V.; Davies, G. R.; Aguirre, V. S.; Ragozzine, D.; Riddle, R.; Baranec, C.; Basu, S.; Chaplin, W. J.; Christensen-Dalsgaard, J.; Metcalfe, T. S.; Bedding, T. R.; Handberg, R.; Stello, D.; Brewer, J. M.; Hekker, S.; Karoff, C.; Kolbl, R.; Law, N. M.; Lundkvist, M.; Miglio, A.; Rowe, Jason F.; Santos, N. C.; Van Laerhoven, C.; Arentoft, T.; Elsworth, Y. P.; Fischer, Debra A.; Kawaler, Steven D.; Kjeldsen, H.; Lund, M. N.; Marcy, Geoffrey W.; Sousa, S. G.; Sozzetti, A.; White, T. R. (2015-02)
    The chemical composition of stars hosting small exoplanets (with radii less than four Earth radii) appears to be more diverse than that of gas-giant hosts, which tend to be metal-rich. This implies that small, including ...
  • Ancient Light From Young Cosmic Cities: Physical And Observational Signatures Of Galaxy Proto-Clusters 

    Chiang, Yi-Kuan; Overzier, Roderik; Gebhardt, Karl (2013-12)
    A growing number of galaxy clusters at z = 1-2 is being discovered as part of deep optical, IR, X-ray, and Sunyaev-Zel'dovich effect surveys. For a complete picture of cluster formation, however, it is important that we ...
  • Angular Momenta, Dynamical Masses, And Mergers Of Brightest Cluster Galaxies 

    Tran, Kim-Vy; Brough, Sarah; Gebhardt, Karl; von der Linden, Anja; Couch, Warrick J.; Sharp, Rob (2013-12)
    Using the VIMOS integral field unit (IFU) spectrograph on the Very Large Telescope, we have spatially mapped the kinematic properties of 10 nearby brightest cluster galaxies (BCGs) and 4 BCG companion galaxies located ...
  • Application Of The Cubed-Sphere Grid To Tilted Black Hole Accretion Disks 

    Fragile, P. Chris; Lindner, Christopher C.; Anninos, Peter; Salmonson, Jay D. (2009-01)
    In recent work we presented the first results of global general relativistic magnetohydrodynamic (GRMHD) simulations of tilted (or misaligned) accretion disks around rotating black holes. The simulated tilted disks showed ...
  • Are Dusty Galaxies Blue? Insights On Uv Attenuation From Dust-Selected Galaxies 

    Casey, C. M.; Scoville, N. Z.; Sanders, D. B.; Lee, N.; Cooray, Asantha; Finkelstein, Steven L.; Capak, P.; Conley, A.; De Zotti, G.; Farrah, D.; Fu, H.; Le Floc'h, E.; Ilbert, O.; Ivison, Rob J.; Takeuchi, T. T. (2014-12)
    Galaxies' rest-frame ultraviolet (UV) properties are often used to directly infer the degree to which dust obscuration affects the measurement of star formation rates (SFRs). While much recent work has focused on calibrating ...
  • Aspherical Core-Collapse Supernovae In Red Supergiants Powered By Nonrelativistic Jets 

    Couch, Sean M.; Wheeler, J. Craig; Milosavljevic, Milos (2009-05)
    We explore the observational characteristics of jet-driven supernovae (SNe) by simulating bipolar-jet-driven explosions in a red supergiant (RSG) progenitor. We present results of four models in which we hold the injected ...
  • Aspherical Supernova Shock Breakout And The Observations Of Supernova 2008D 

    Couch, Sean M.; Pooley, David; Wheeler, J. Craig; Milosavljevic, Milos (2011-02)
    Shock breakout is the earliest, readily observable emission from a core-collapse supernova (SN) explosion. Observing SN shock breakout may yield information about the nature of the SN shock prior to exiting the progenitor ...
  • Assembly Of The First Disk Galaxies Under Radiative Feedback From Pop III Stars 

    Pawlik, A. H.; Milosavljevic, M.; Bromm, V. (2012-05)
    We investigate how radiative feedback from the first stars affects the assembly of the first dwarf galaxies. We perform cosmological zoomed smoothed particle hydrodynamics simulations of a galaxy assembling inside a halo ...
  • Assembly Of The First Dwarf Galaxies 

    Pawlik, A.; Milosavljevic, M.; Bromm, V. (2010-11)
    Understanding the formation and evolution of the first stars and galaxies is crucial to understanding reionization, a key epoch in the history of the Universe. Detailed theoretical studies of the galaxies before and during ...
  • Astrometry With The Hubble Space Telescope: Trigonometric Parallaxes Of Planetary Nebula Nuclei NGC 6853, NGC 7293, Abell 31, And Deht 5 

    Benedict, G. Fritz; McArthur, Barbara E.; Napiwotzki, Ralph; Harrison, Thomas E.; Harris, Hugh C.; Nelan, Edmund; Bond, Howard E.; Patterson, Richard J.; Ciardullo, Robin (2009-12)
    We present absolute parallaxes and relative proper motions for the central stars of the planetary nebulae NGC 6853 (The Dumbbell), NGC 7293 (The Helix), Abell 31, and DeHt 5. This paper details our reduction and analysis ...
  • Astrophysical radiation environments of habitable worlds 

    Smith, David Samuel (2006)
    Not available
  • Atmospheric Composition Of Weak G Band Stars: CNO And Li Abundances 

    Adamczak, Jens; Lambert, David L. (2013-03)
    We determined the chemical composition of a large sample of weak G band stars-a rare class of G and K giants of intermediate mass with unusual abundances of C, N, and Li. We have observed 24 weak G band stars with the 2.7 ...