Now showing items 582-601 of 728

  • A small survey of the magnetic fields of planet-host stars 

    Fares, R.; Moutou, C.; Donati, J.-F.; Catala, C.; Shkolnik, E. L.; Jardine, M. M.; Cameron, A. C.; Deleuil, M. (2013-10-21) - Journal article
    Using spectropolarimetry, we investigate the large-scale magnetic topologies of stars hosting close-in exoplanets. A small survey of 10 stars has been done with the twin instruments Télescope Bernard Lyot /NARVAL and ...
  • Solar cycle variation of magnetic flux ropes in a quasi-static coronal evolution model 

    Yeates, A. R.; Constable, J. A.; Martens, P. C. H. (2010-05) - Journal article
    The structure of electric current and magnetic helicity in the solar corona is closely linked to solar activity over the 11-year cycle, yet is poorly understood. As an alternative to traditional current-free "potential ...
  • The solar cycle variation of topological structures in the global solar corona 

    Platten, S.J.; Parnell, C.E.; Haynes, A.L.; Priest, E.R.; MacKay, D.H. (2014-05-01) - Journal article
    Context. The complicated distribution of magnetic flux across the solar photosphere results in a complex web of coronal magnetic field structures. To understand this complexity, the magnetic skeleton of the coronal field ...
  • Solar prominences embedded in flux ropes : morphological features and dynamics from 3D MHD simulations 

    Terradas, J.; Soler, R.; Luna, M.; Oliver, R.; Ballester, J. L.; Wright, Andrew Nicholas (2016-03-30) - Journal article
    The temporal evolution of a solar prominence inserted in a three-dimensional magnetic flux rope is investigated numerically. Using the model of Titov & Démoulin (1999) under the regime of weak twist, the cold and dense ...
  • Solar science with the Atacama Large Millimeter/Submillimeter Array — a new view of our sun 

    Wedemeyer, S.; Bastian, T.; Brajša, R.; Hudson, H.; Fleishman, G.; Loukitcheva, M.; Fleck, B.; Kontar, E. P.; De Pontieu, B.; Yagoubov, P.; Tiwari, S. K.; Soler, R.; Black, J. H.; Antolin, P.; Scullion, E.; Gunár, S.; Labrosse, N.; Ludwig, H.-G.; Benz, A. O.; White, S. M.; Hauschildt, P.; Doyle, J. G.; Nakariakov, V. M.; Ayres, T.; Heinzel, P.; Karlicky, M.; Van Doorsselaere, T.; Gary, D.; Alissandrakis, C. E.; Nindos, A.; Solanki, S. K.; Rouppe van der Voort, L.; Shimojo, M.; Kato, Y.; Zaqarashvili, T.; Perez, E.; Selhorst, C. L.; Barta, M. (2016-04) - Journal article
    The Atacama Large Millimeter/submillimeter Array (ALMA) is a new powerful tool for observing the Sun at high spatial, temporal, and spectral resolution. These capabilities can address a broad range of fundamental scientific ...
  • Space telescope and optical reverberation mapping project. I. Ultraviolet observations of the Seyfert 1 galaxy NGC 5548 with the cosmic origins spectrograph on Hubble Space Telescope 

    Rosa, G.D.; Peterson, B.M.; Ely, J.; Kriss, G.A.; Crenshaw, D.M.; Horne, K.; Korista, K.T.; Netzer, H.; Pogge, R.W.; Arévalo, P.; Barth, A.J.; Bentz, M.C.; Brandt, W.N.; Breeveld, A.A.; Brewer, B.J.; Dalla Bontá, E.; De Lorenzo-Caceres Rodriguez, Adriana; Denney, K.D.; Dietrich, M.; Edelson, R.; Evans, P.A.; Fausnaugh, M.M.; Gehrels, N.; Gelbord, J.M.; Goad, M.R.; Grier, C.J.; Grupe, D.; Hall, P.B.; Kaastra, J.; Kelly, B.C.; Kennea, J.A.; Kochanek, C.S.; Lira, P.; Mathur, S.; McHardy, I.M.; Nousek, J.A.; Pancoast, A.; Papadakis, I.; Pei, L.; Schimoia, J.S.; Siegel, M.; Starkey, D.; Treu, T.; Uttley, P.; Vaughan, S.; Vestergaard, M.; Villforth, C.; Yan, H.; Young, S.; Zu, Y. (2015-06-10) - Journal article
    We describe the first results from a six-month long reverberation-mapping experiment in the ultraviolet based on 171 observations of the Seyfert 1 galaxy NGC 5548 with the Cosmic Origins Spectrograph on the Hubble Space ...
  • Space telescope and optical reverberation mapping project. II. Swift and HST reverberation mapping of the accretion disk of NGC 5548 

    Edelson, R.; Gelbord, J. M.; Horne, K.; McHardy, I. M.; Peterson, B. M.; Arevalo, P.; Breeveld, A. A.; De Rosa, G.; Evans, P. A.; Goad, M. R.; Kriss, G. A.; Brandt, W. N.; Gehrels, N.; Grupe, D.; Kennea, J. A.; Kochanek, C. S.; Nousek, J. A.; Papadakis, I.; Siegel, M.; Starkey, D.; Uttley, P.; Vaughan, S.; Young, S.; Barth, A. J.; Bentz, M. C.; Brewer, B. J.; Crenshaw, D. M.; Bonta, E. Dalla; De Lorenzo-Caceres, A.; Denney, K. D.; Dietrich, M.; Ely, J.; Fausnaugh, M. M.; Grier, C. J.; Hall, P. B.; Kaastra, J.; Kelly, B. C.; Korista, K. T.; Lira, P.; Mathur, S.; Netzer, H.; Pancoast, A.; Pei, L.; Pogge, R. W.; Schimoia, J. S.; Treu, T.; Vestergaard, M.; Villforth, C.; Yan, H.; Zu, Y. (2015-06-12) - Journal article
    Recent intensive Swift monitoring of the Seyfert 1 galaxy NGC 5548 yielded 282 usable epochs over 125 days across six UV/optical bands and the X-rays. This is the densest extended active galactic nucleus (AGN) UV/optical ...
  • Space Telescope and Optical Reverberation Mapping Project. III. Optical continuum emission and broadband time delays in NGC 5548 

    Fausnaugh, M. M.; Denney, K. D.; Barth, A. J.; Bentz, M. C.; Bottorff, M. C.; Carini, M. T.; Croxall, K. V.; Rosa, G. De; Goad, M. R.; Horne, Keith; Joner, M. D.; Kaspi, S.; Kim, M.; Klimanov, S. A.; Kochanek, C. S.; Leonard, D. C.; Netzer, H.; Peterson, B. M.; Schnülle, K.; Sergeev, S. G.; Vestergaard, M.; Zheng, W. K.; Zu, Y.; Anderson, M. D.; Arévalo, P.; Bazhaw, C.; Borman, G. A.; Boroson, T. A.; Brandt, W. N.; Breeveld, A. A.; Brewer, B. J.; Cackett, E. M.; Crenshaw, D. M.; Bontà, E. Dalla; De Lorenzo-Cáceres, A.; Dietrich, M.; Edelson, R.; Efimova, N. V.; Ely, J.; Evans, P. A.; Filippenko, A. V.; Flatland, K.; Gehrels, N.; Geier, S.; Gelbord, J. M.; Gonzalez, L.; Gorjian, V.; Grier, C. J.; Grupe, D.; Hall, P. B.; Hicks, S.; Horenstein, D.; Hutchison, T.; Im, M.; Jensen, J. J.; Jones, J.; Kaastra, J.; Kelly, B. C.; Kennea, J. A.; Kim, S. C.; Korista, K. T.; Kriss, G. A.; Lee, J. C.; Lira, P.; Macinnis, F.; Manne-Nicholas, E. R.; Mathur, S.; McHardy, I. M.; Montouri, C.; Musso, R.; Nazarov, S. V.; Norris, R. P.; Nousek, J. A.; Okhmat, D. N.; Pancoast, A.; Papadakis, I.; Parks, J. R.; Pei, L.; Pogge, R. W.; Pott, J. -U.; Rafter, S. E.; Rix, H. -W.; Saylor, D. A.; Schimoia, J. S.; Siegel, M.; Spencer, M.; Starkey, D.; Sung, H. I.; Teems, K. G.; Treu, T.; Turner, C. S.; Uttley, P.; Villforth, C.; Weiss, Y.; Woo, J. H.; Yan, H.; Young, S. (2016-04-10) - Journal article
    We present ground-based optical photometric monitoring data for NGC 5548, part of an extended multiwavelength reverberation mapping campaign. The light curves have nearly daily cadence from 2014 January to July in nine ...
  • Space telescope and optical reverberation mapping project. IV. Anomalous behavior of the broad ultraviolet emission lines in NGC 5548 

    Goad, M. R.; Korista, K. T.; Rosa, G. De; Kriss, G. A.; Edelson, R.; Barth, A. J.; Ferland, G. J.; Kochanek, C. S.; Netzer, H.; Peterson, B. M.; Bentz, M. C.; Bisogni, S.; Crenshaw, D. M.; Denney, K. D.; Ely, J.; Fausnaugh, M. M.; Grier, C. J.; Gupta, A.; Horne, K. D.; Kaastra, J.; Pancoast, A.; Pei, L.; Pogge, R. W.; Skielboe, A.; Starkey, D.; Vestergaard, M.; Zu, Y.; Anderson, M. D.; Arévalo, P.; Bazhaw, C.; Borman, G. A.; Boroson, T. A.; Bottorff, M. C.; Brandt, W. N.; Breeveld, A. A.; Brewer, B. J.; Cackett, E. M.; Carini, M. T.; Croxall, K. V.; Bontá, E. Dalla; De Lorenzo-Caceres Rodriguez, Adriana; Dietrich, M.; Efimova, N. V.; Evans, P. A.; Filippenko, A. V.; Flatland, K.; Gehrels, N.; Geier, S.; Gelbord, J. M.; Gonzalez, L.; Gorjian, V.; Grupe, D.; Hall, P. B.; Hicks, S.; Horenstein, D.; Hutchison, T.; Im, M.; Jensen, J. J.; Joner, M. D.; Jones, J.; Kaspi, S.; Kelly, B. C.; Kennea, J. A.; Kim, M.; Kim, S. C.; Klimanov, S. A.; Lee, J. C.; Leonard, D. C.; Lira, P.; Macinnis, F.; Manne-Nicholas, E. R.; Mathur, S.; McHardy, I. M.; Montouri, C.; Musso, R.; Nazarov, S. V.; Norris, R. P.; Nousek, J. A.; Okhmat, D. N.; Papadakis, I.; Parks, J. R.; Pott, J. U.; Rafter, S. E.; Rix, H. W.; Saylor, D. A.; Schimoia, J. S.; Schnülle, K.; Sergeev, S. G.; Siegel, M.; Spencer, M.; Sung, H. I.; Teems, K. G.; Treu, T.; Turner, C. S.; Uttley, P.; Villforth, C.; Weiss, Y.; Woo, J. H.; Yan, H.; Young, S.; Zheng, W. K. (2016-06-03) - Journal article
    During an intensive Hubble Space Telescope (HST) Cosmic Origins Spectrograph (COS) UV monitoring campaign of the Seyfert 1 galaxy NGC 5548 performed from 2014 February to July, the normally highly correlated far UV continuum ...
  • Space Telescope and Optical Reverberation Mapping Project. V. Optical spectroscopic campaign and emission-line analysis for NGC 5548 

    Pei, L.; Fausnaugh, M. M.; Barth, A. J.; Peterson, B. M.; Bentz, M. C.; De Rosa, G.; Denney, K. D.; Goad, M. R.; Kochanek, C. S.; Korista, K. T.; Kriss, G. A.; Pogge, R. W.; Bennert, V. N.; Brotherton, M.; Clubb, K. I.; Bontà, E. Dalla; Filippenko, A. V.; Greene, J. E.; Grier, C. J.; Vestergaard, M.; Zheng, W.; Adams, Scott M.; Beatty, Thomas G.; Bigley, A.; Brown, Jacob E.; Brown, Jonathan S.; Canalizo, G.; Comerford, J. M.; Coker, Carl T.; Corsini, E. M.; Croft, S.; Croxall, K. V.; Deason, A. J.; Eracleous, Michael; Fox, O. D.; Gates, E. L.; Henderson, C. B.; Holmbeck, E.; Holoien, T. W. -S.; Jensen, J. J.; Johnson, C. A.; Kelly, P. L.; Kim, S.; King, A.; Lau, M. W.; Li, Miao; Lochhaas, Cassandra; Ma, Zhiyuan; Manne-Nicholas, E. R.; Mauerhan, J. C.; Malkan, M. A.; McGurk, R.; Morelli, L.; Mosquera, Ana; Mudd, Dale; Muller Sanchez, F.; Nguyen, M. L.; Ochner, P.; Ou-Yang, B.; Pancoast, A.; Penny, Matthew T.; Pizzella, A.; Poleski, Radosław; Runnoe, Jessie; Scott, B.; Schimoia, Jaderson S.; Shappee, B. J.; Shivvers, I.; Simonian, Gregory V.; Siviero, A.; Somers, Garrett; Stevens, Daniel J.; Strauss, M. A.; Tayar, Jamie; Tejos, N.; Treu, T.; Van Saders, J.; Vican, L.; Villanueva Jr, S.; Yuk, H.; Zakamska, N. L.; Zhu, W.; Anderson, M. D.; Arévalo, P.; Bazhaw, C.; Bisogni, S.; Borman, G. A.; Bottorff, M. C.; Brandt, W. N.; Breeveld, A. A.; Cackett, E. M.; Carini, M. T.; Crenshaw, D. M.; De Lorenzo-Caceres Rodriguez, Adriana; Dietrich, M.; Edelson, R.; Efimova, N. V.; Ely, J.; Evans, P. A.; Ferland, G. J.; Flatland, K.; Gehrels, N.; Geier, S.; Gelbord, J. M.; Grupe, D.; Gupta, A.; Hall, P. B.; Hicks, S.; Horenstein, D.; Horne, Keith; Hutchison, T.; Im, M.; Joner, M. D.; Jones, J.; Kaastra, J.; Kaspi, S.; Kelly, B. C.; Kennea, J. A.; Kim, M.; Kim, S. C.; Klimanov, S. A.; Lee, J. C.; Leonard, D. C.; Lira, P.; MacInnis, F.; Mathur, S.; McHardy, I. M.; Montouri, C.; Musso, R.; Nazarov, S. V.; Netzer, H.; Norris, R. P.; Nousek, J. A.; Okhmat, D. N.; Papadakis, I.; Parks, J. R.; Pott, J. -U.; Rafter, S. E.; Rix, H. -W.; Saylor, D. A.; Schnülle, K.; Sergeev, S. G.; Siegel, M.; Skielboe, A.; Spencer, M.; Starkey, D.; Sung, H. -I.; Teems, K. G.; Turner, C. S.; Uttley, P.; Villforth, C.; Weiss, Y.; Woo, J. -H.; Yan, H.; Young, S.; Zu, Y. (2017-03-10) - Journal article
    We present the results of an optical spectroscopic monitoring program targeting NGC 5548 as part of a larger multiwavelength reverberation mapping campaign. The campaign spanned 6 months and achieved an almost daily cadence ...
  • Space Telescope and Optical Reverberation Mapping Project. VI. : reverberating disk models for NGC 5548 

    Starkey, D.; Horne, Keith; Fausnaugh, M. M.; Peterson, B. M.; Bentz, M. C.; Kochanek, C. S.; Denney, K. D.; Edelson, R.; Goad, M. R.; Rosa, G. De; Anderson, M. D.; Arévalo, P.; Barth, A. J.; Bazhaw, C.; Borman, G. A.; Boroson, T. A.; Bottorff, M. C.; Brandt, W. N.; Breeveld, A. A.; Cackett, E. M.; Carini, M. T.; Croxall, K. V.; Crenshaw, D. M.; Bonta, E. Dalla; De Lorenzo-Caceres Rodriguez, Adriana; Dietrich, M.; Efimova, N. V.; Ely, J.; Evans, P. A.; Filippenko, A. V.; Flatland, K.; Gehrels, N.; Geier, S.; Gelbord, J. M.; Gonzalez, L.; Gorjian, V.; Grier, C. J.; Grupe, D.; Hall, P. B.; Hicks, S.; Horenstein, D.; Hutchison, T.; Im, M.; Jensen, J. J.; Joner, M. D.; Jones, J.; Kaastra, J.; Kaspi, S.; Kelly, B. C.; Kennea, J. A.; Kim, S. C.; Kim, M.; Klimanov, S. A.; Korista, K. T.; Kriss, G. A.; Lee, J. C.; Leonard, D. C.; Lira, P.; MacInnis, F.; Manne-Nicholas, E. R.; Mathur, S.; McHardy, I. M.; Montouri, C.; Musso, R.; Nazarov, S. V.; Norris, R. P.; Nousek, J. A.; Okhmat, D. N.; Pancoast, A.; Parks, J. R.; Pei, L.; Pogge, R. W.; Pott, J. -U.; Rafter, S. E.; Rix, H. W.; Saylor, D. A.; Schimoia, J. S.; Schnulle, K.; Sergeev, S. G.; Siegel, M. H.; Spencer, M.; Sung, H. -I.; Teems, K. G.; Turner, C. S.; Uttley, P.; Vestergaard, M.; Villforth, C.; Weiss, Y.; Woo, J. -H.; Yan, H.; Young, S.; Zheng, W.; Zu, Y. (2017-01-20) - Journal article
    We conduct a multiwavelength continuum variability study of the Seyfert 1 galaxy NGC 5548 to investigate the temperature structure of its accretion disk. The 19 overlapping continuum light curves (1158 Å to 9157 Å) combine ...
  • Spatially resolved imaging of the two-component η Crv debris disk with Herschel 

    Duchêne, G.; Arriaga, P.; Wyatt, M.; Kennedy, G.; Sibthorpe, B.; Lisse, C.; Holland, W.; Wisniewski, J.; Clampin, M.; Kalas, P.; Pinte, C.; Wilner, D.; Booth, M.; Horner, J.; Matthews, B.; Greaves, J. (2014-04-01) - Journal article
    We present far-infrared and submillimeter images of the η Crv debris disk system obtained with Herschel and SCUBA-2, as well as Hubble Space Telescope visible and near-infrared coronagraphic images. In the 70 μm Herschel ...
  • Spectral fingerprints of Earth-like planets around FGK stars 

    Rugheimer, Sarah; Kaltenegger, Lisa; Zsom, Andras; Segura, Antígona; Sasselov, Dimitar (2013-03-28) - Journal article
    We present model atmospheres for an Earth-like planet orbiting the entire grid of main sequence FGK stars with effective temperatures ranging from T eff=4250 K to Teff=7000 K in 250 K intervals. We have modeled the remotely ...
  • A spectro-polarimetric study of the planet-hosting G dwarf, HD 147513 

    Hussain, Gaitee Ara Jaffer; Alvarado-Gómez, J. D.; Grunhut, J.; Donati, J.-F.; Alecian, E.; Oksala, M.; Morin, J.; Fares, Rim; Jardine, Moira Mary; Drake, J. J.; Cohen, O.; Matt, S.; Petit, P.; Redfield, S.; Walter, F. M. (2016-01) - Journal article
    The results from a spectro-polarimetric study of the planet-hosting Sun-like star, HD 147513 (G5V), are presented here. Robust detections of Zeeman signatures at all observed epochs indicate a surface magnetic field, with ...
  • The spectroscopic imprint of the pre-eruptive configuration resulting into two major coronal mass ejections 

    Syntelis, P.; Gontikakis, C.; Patsourakos, S.; Tsinganos, K. (2016-04) - Journal article
    Aims: We present a spectroscopic analysis of the pre-eruptive configuration of active region NOAA 11429, prior to two very fast coronal mass ejections (CMEs) on March 7, 2012 that are associated with this active region. ...
  • A spectroscopic survey of Herbig Ae/Be stars with X-shooter - I. Stellar parameters and accretion rates 

    Fairlamb, J. R.; Oudmaijer, R. D.; Mendigutía, I.; Ilee, John David; van den Ancker, M. E. (2015-10-11) - Journal article
    Herbig Ae/Be stars (HAeBes) span a key mass range that links low- and high-mass stars, and thus provide an ideal window from which to explore their formation. This paper presents Very Large Telescope/X-shooter spectra of ...
  • Spin-orbit angles as a probe to orbital evolution 

    Triaud, Amaury; Collier Cameron, Andrew; Queloz, Didier; Anderson, David; Brown, David John Alexander; Smalley, Barry; Bouchy, Francois; Lendl, Monika; Gillon, Michael (2013-07-01) - Conference poster
    The WASP (Wide Angle Search for Planets) has discovered 75 planets in the Southern Hemisphere. We followed-up 40 of these and observed the Rossiter-McLaughlin effect. It allows us to measure the angle between the stellar ...
  • Spin-orbit angles, and the aligned-misaligned transition 

    Brown, D. J. A.; Triaud, A. H. M. J.; Cameron, A. C. (2013-09-01) - Conference poster
    The number of planetary systems with measured or inferred spin-orbit alignment angles is rapidly approaching 100. With increased sample size comes increased importance of ‘unusual’ systems: either very hot or very cold ...
  • Spitzer as a microlens parallax satellite : mass and distance measurements of the binary lens system OGLE-2014-BLG-1050L 

    Zhu, Wei; Udalski, A.; Gould, A.; Dominik, M.; Bozza, V.; Han, C.; Yee, J. C.; Calchi Novati, S.; Beichman, C. A.; Carey, S.; Poleski, R.; Skowron, J.; Kozłowski, S.; Mróz, P.; Pietrukowicz, P.; Pietrzyński, G.; Szymański, M. K.; Soszyński, I.; Ulaczyk, K.; Wyrzykowski, Ł.; Gaudi, B. S.; Pogge, R. W.; DePoy, D. L.; Jung, Y. K.; Choi, J.-Y.; Hwang, K.-H.; Shin, I.-G.; Park, H.; Jeong, J. (2015-05-20) - Journal article
    We report the first mass and distance measurements of a caustic-crossing binary system OGLE-2014-BLG-1050 L using the space-based microlens parallax method. Spitzer captured the second caustic crossing of the event, which ...
  • Spitzer microlens measurement of a massive remnant in a well-separated binary 

    Shvartzvald, Y.; Udalski, A.; Gould, A.; Han, C.; Bozza, V.; Friedmann, M.; Hundertmark, Markus Peter Gerhard; Beichman, C.; Bryden, G.; Novati, S. Calchi; Carey, S.; Fausnaugh, M.; Gaudi, B. S.; Henderson, C. B.; Kerr, T.; Pogge, R. W.; Varricatt, W.; Wibking, B.; Yee, J. C.; Zhu, W.; Poleski, R.; Pawlak, M.; Szymański, M. K.; Skowron, J.; Mróz, P.; Kozłowski, S.; Wyrzykowski, Ł.; Pietrukowicz, P.; Pietrzyński, G.; Soszyński, I.; Ulaczyk, K.; Choi, J.-Y.; Park, H.; Jung, Y. K.; Shin, I.-G.; Albrow, M. D.; Park, B.-G.; Kim, S.-L.; Lee, C.-U.; Cha, S.-M.; Kim, D.-J.; Lee, Y.; Maoz, D.; Kaspi, S.; Street, R. A.; Tsapras, Y.; Bachelet, E.; Dominik, Martin; Bramich, D. M.; Horne, Keith Douglas; Snodgrass, C.; Steele, I. A.; Menzies, J.; Figuera Jaimes, Roberto Jose; Wambsganss, J.; Schmidt, R.; Cassan, A.; Ranc, C.; Mao, S.; Dong, Subo; D’Ago, G.; Scarpetta, G.; Verma, P.; Jørgensen, U. G.; Kerins, E.; Skottfelt, J. (2015-12-01) - Journal article
    We report the detection and mass measurement of a binary lens OGLE-2015-BLG-1285La,b, with the more massive component having M1 > 1.35 M⊙ (80% probability). A main-sequence star in this mass range is ruled out by limits ...