Now showing items 11039-11058 of 40316

  • Discovery of a Close Substellar Companion to the Hot Subdwarf Star HD 149382-the Decisive Influence of Substellar Objects on Late Stellar Evolution 

    Geier, S.; Edelmann, H.; Heber, U.; Morales-Rueda, L. (2009-09)
    Substellar objects, like planets and brown dwarfs orbiting stars, are by-products of the star Formation process. The evolution of their host stars may have an enormous impact on these small companions. Vice versa a planet ...
  • Discovery Of A Cosmological, Relativistic Outburst Via Its Rapidly Fading Optical Emission 

    Cenko, S. Bradley; Kulkarni, S. R.; Horesh, Assaf; Corsi, Alessandra; Fox, Derek B.; Carpenter, John; Frail, Dale A.; Nugent, Peter E.; Perley, Daniel A.; Gruber, D.; Gal-Yam, Avishay; Groot, Paul J.; Hallinan, G.; Ofek, Eran O.; Rau, Arne; MacLeod, Chelsea L.; Miller, Adam A.; Bloom, Joshua S.; Filippenko, Alexei V.; Kasliwal, Mansi M.; Law, Nicholas M.; Morgan, Adam N.; Polishook, David; Poznanski, Dovi; Quimby, Robert M.; Sesar, Branimir; Shen, Ken J.; Silverman, Jeffrey M.; Sternberg, Assaf (2013-06)
    We report the discovery by the Palomar Transient Factory (PTF) of the transient source PTF11agg, which is distinguished by three primary characteristics: (1) bright (R-peak = 18.3mag), rapidly fading (Delta R = 4mag in ...
  • Discovery of a Dynamical Cold Point in the Heart of the Sagittarius dSph Galaxy With Observations from the APOGEE Project 

    Majewski, Steven R.; Hasselquist, Sten; Lokas, Ewa L.; Nidever, David L.; Frinchaboy, Peter M.; Garcia Perez, Ana E.; Johnston, Kathryn V.; Meszaros, Szabolcs; Shetrone, Matthew; Allende Prieto, Carlos; Beaton, Rachael L.; Beers, Timothy C.; Bizyaev, Dmitry; Cunha, Katia; Damke, Guillermo; Ebelke, Garrett; Eisenstein, Daniel J.; Hearty, Fred; Holtzman, Jon; Johnson, Jennifer A.; Law, David R.; Malanushenko, Viktor; Malanushenko, Elena; O'Connell, Robert W.; Oravetz, Daniel; Pan, Kaike; Schiavon, Ricardo P.; Schneider, Donald P.; Simmons, Audrey; Skrutskie, Michael F.; Smith, Verne V.; Wilson, John C.; Zasowski, Gail (2013-11)
    The dynamics of the core of the Sagittarius (Sgr) dwarf spheroidal (dSph) galaxy are explored using high-resolution (R similar to 22,500), H-band, near-infrared spectra of over 1000 giant stars in the central 3 deg(2) of ...
  • Discovery of A GeV Blazar Shining Through the Galactic Plane 

    Vandenbroucke, J.; Buehler, R.; Ajello, M.; Bechtol, K.; Bellini, A.; Bolte, M.; Cheung, C. C.; Civano, F.; Donato, D.; Fuhrmann, L.; Funk, S.; Healey, S. E.; Hill, A. B.; Knigge, C.; Madejski, G. M.; Romani, R. W.; Santander-Garcia, M.; Shaw, M. S.; Steeghs, D.; Torres, M. A. P.; Van Etten, A.; Williams, Kurtis A. (2010-08)
    The Fermi Large Area Telescope (LAT) discovered a new gamma-ray source near the Galactic plane, Fermi J0109+6134, when it flared brightly in 2010 February. The low Galactic latitude (b = -1 degrees.2) indicated that the ...
  • Discovery of a Large Number of Candidate Protoclusters Traced By Similar to 15 Mpc-Scale Galaxy Overdensities in COSMOS 

    Chiang, Yi-Kuan; Overzier, Roderick; Gebhardt, Karl (2014-02)
    To demonstrate the feasibility of studying the epoch of massive galaxy cluster Formation in a more systematic manner using current and future galaxy surveys, we report the discovery of a large sample of protocluster ...
  • Discovery Of A Low-Luminosity, Tight Substellar Binary At The T/Y Transition 

    Dupuy, Trent J.; Liu, Michael C.; Leggett, S. K. (2015-04)
    We have discovered that the brown dwarf WISE J014656.66+423410.0 is a close binary (0 ''.0875 +/- 0 ''.0021, 0.93(-0.16)(+0.12) AU) from Keck laser guide star adaptive optics imaging. Our photometry for this system reveals ...
  • Discovery Of A Low-Mass Bipolar Molecular Outflow From L1014-Irs With The Submillimeter Array 

    Bourke, Tyler L.; Crapsi, Antonio; Myers, Phillip C.; Evans, Neal J.; Wilner, David J.; Huard, Tracy L.; Jorgensen, Jes K.; Young, Chadwick H. (2005-11)
    Using the Submillimeter Array, we report the discovery of a compact low-mass bipolar molecular outflow from L1014-IRS and confirm its association with the L1014 dense core at 200 pc. Consequently, L1014-IRS is the lowest ...
  • Discovery Of A Low-Mass Companion To The Solar-Type Star Tyc 2534-698-1 

    Kane, Steven R.; Mahadevan, Suvrath; Cochran, William D.; Street, Rachel A.; Sivarani, Thirupathi; Henry, Gregory W.; Williamson, Michael H. (2009-02)
    Brown dwarfs and low-mass stellar companions are interesting objects to study since they occupy the mass region between deuterium and hydrogen burning. We report here the serendipitous discovery of a low-mass companion in ...
  • Discovery Of A New AM CVn System With The Kepler Satellite 

    Fontaine, G.; Brassard, P.; Green, E. M.; Charpinet, S.; Dufour, Patrick; Hubeny, I.; Steeghs, D.; Aerts, C.; Randall, S. K.; Bergeron, P.; Guvenen, B.; O'Malley, C. J.; Van Grootel, V.; Ostensen, R. H.; Bloemen, S.; Silvotti, R.; Howell, Steve B.; Baran, A.; Kepler, S. O.; Marsh, T. R.; Montgomery, Michael H.; Oreiro, R.; Provencal, J.; Telting, J.; Winget, D. E.; Zima, W.; Christensen-Dalsgaard, J.; Kjeldsen, H. (2011-01)
    We report the discovery of a new AM CVn system on the basis of broadband photometry obtained with the Kepler satellite supplemented by ground-based optical spectroscopy. Initially retained on Kepler target lists as a ...
  • Discovery Of A Nova-Like Cataclysmic Variable In The Kepler Mission Field 

    Williams, Kurtis A.; de Martino, Domitilla; Silvotti, Roberto; Bruni, Ivan; Dufour, Patrick; Riecken, Thomas S.; Kronberg, Martin; Mukadam, Anjum; Handler, G. (2010-06)
    We announce the identification of a new cataclysmic variable (CV) star in the field of the Kepler Mission, KIC J192410.81+445934.9. This system was identified during a search for compact pulsators in the Kepler field. ...
  • Discovery Of A Wolf-Rayet Star Through Detection Of Its Photometric Variability 

    Littlefield, Colin; Garnavich, Peter; Marion, G. H.; Vinko, Jozsef; McClelland, Colin; Rettig, Terrence; Wheeler, J. Craig (2012-06)
    We report the serendipitous discovery of a heavily reddened Wolf-Rayet star that we name WR 142b. While photometrically monitoring a cataclysmic variable, we detected weak variability in a nearby field star. Low-resolution ...
  • Discovery of A ZZ Ceti in the Kepler Mission Field 

    Hermes, J. J.; Mullally, Fergal; Ostensen, R. H.; Williams, Kurtis A.; Telting, John; Southworth, John; Bloemen, S.; Howell, Steve B.; Everett, Mark; Winget, D. E. (2011-11)
    We report the discovery of the first identified pulsating DA white dwarf, WD J1916+3938 (Kepler ID 4552982), in the field of the Kepler mission. This ZZ Ceti star was first identified through ground-based, time-series ...
  • Discovery of an Ultramassive Pulsating White Dwarf 

    Hermes, J. J.; Kepler, S. O.; Castanheira, Barbara G.; Gianninas, A.; Winget, D. E.; Montgomery, M. H.; Brown, Warren R.; Harrold, Samuel T. (2013-07)
    We announce the discovery of the most massive pulsating hydrogen-atmosphere white dwarf (WD) ever discovered, GD 518. Model atmosphere fits to the optical spectrum of this star show it is a 12,030 +/- 210 K WD with a log ...
  • Discovery Of Binarity, Spectroscopic Frequency Analysis, And Mode Identification Of The Delta Scuti Star 4 CVn 

    Schmid, V. S.; Themessl, N.; Breger, M.; Degroote, P.; Aerts, C.; Beck, P. G.; Tkachenko, A.; Van Reeth, T.; Bloemen, S.; Debosscher, J.; Castanheira, B. G.; McArthur, B. E.; Papics, P. I.; Fritz, V.; Falcon, R. E. (2014-10)
    More than 40 years of ground-based photometric observations of the delta Sct star 4 CVn has revealed 18 independent oscillation frequencies, including radial as well as non-radial p-modes of low spherical degree l <= 2. ...
  • The Discovery of Entropy -- and its Implications 

    Schulman, Adam (2012-03-26)
  • Discovery Of Ethanol-Responsive Small Rnas In Zymomonas Mobilis 

    Cho, Seung Hee; Lei, Roy; Henninger, Trey D.; Contreras, Lydia M. (2014-07)
    Zymomonas mobilis is a bacterium that can produce ethanol by fermentation. Due to its unique metabolism and efficient ethanol production, Z. mobilis has attracted special interest for biofuel energy applications; an important ...
  • The Discovery Of Hd 37605C And A Dispositive Null Detection Of Transits Of Hd 37605B 

    Wang, Sharon Xuesong; Wright, Jason T.; Cochran, William; Kane, Steven R.; Henry, Gregory W.; Payne, Matthew J.; Endl, Michael; MacQueen, Phillip J.; Valenti, Jeff A.; Antoci, Victoria; Dragomir, Diana; Matthews, Jaymie M.; Howard, Andrew W.; Marcy, Geoffrey W.; Isaacson, Howard; Ford, Eric B.; Mahadevan, Suvrath; von Braun, Kaspar (2012-12)
    We report the radial velocity discovery of a second planetary mass companion to the K0 V star HD 37605, which was already known to host an eccentric, P similar to 55 days Jovian planet, HD 37605b. This second planet, HD ...
  • Discovery Of Lyman Break Galaxies At Z Similar To 7 From The Zfourge Survey 

    Tilvi, Vithal; Papovich, Casey; Tran, K. V. H.; Labbe, I.; Spitler, L. R.; Straatman, C. M. S.; Persson, S. E.; Monson, A.; Glazebrook, K.; Quadri, R. F.; van Dokkum, P.; Ashby, M. L. N.; Faber, S. M.; Fazio, G. G.; Finkelstein, Steven L.; Ferguson, Henry C.; Grogin, N. A.; Kacprzak, G. G.; Kelson, Daniel D.; Koekemoer, A. M.; Murphy, David; McCarthy, P. J.; Newman, Jeffrey A.; Salmon, Brett; Willner, S. P. (2013-05)
    Star-forming galaxies at redshiftsz > 6 are likely responsible for the reionization of the universe, and it is important to study the nature of these galaxies. We present three candidates for z similar to 7 Lyman break ...
  • Discovery Of Polarization Reverberation In NGC 4151 

    Gaskell, C. Martin; Goosmann, Rene W.; Merkulova, Nelly I.; Shakhovskoy, Nikolay M.; Shoji, Masatoshi (2012-04)
    Observations of the optical polarization of NGC 4151 in 1997-2003 show variations of an order of magnitude in the polarized flux while the polarization position angle remains constant. The amplitude of variability of the ...
  • Discovery Of Pulsations, Including Possible Pressure Modes, In Two New Extremely Low Mass, He-Core White Dwarfs 

    Hermes, J. J.; Montgomery, Michael H.; Winget, D. E.; Brown, Warren R.; Gianninas, A.; Kilic, Mukremin; Kenyon, S. J.; Bell, Keaton J.; Harrold, Samuel T. (2013-03)
    We report the discovery of the second and third pulsating extremely low mass (ELM) white dwarfs (WDs), SDSS J111215.82+111745.0 (hereafter J1112) and SDSS J151826.68+065813.2 (hereafter J1518). Both have masses < 0.25 ...