Now showing items 557-576 of 681

  • 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 ...
  • The Spitzer microlensing program as a probe for globular cluster planets : analysis of OGLE-2015-BLG-0448 

    Poleski, Radosław; Zhu, Wei; Christie, Grant W.; Udalski, Andrzej; Gould, Andrew; Bachelet, Etienne; Skottfelt, Jesper; Calchi Novati, Sebastiano; Szymański, M. K.; Soszyński, I.; Pietrzyński, G.; Wyrzykowski, Ł.; Ulaczyk, K.; Pietrukowicz, P.; Kozłowski, Szymon; Skowron, J.; Mróz, P.; Pawlak, M.; Beichman, C.; Bryden, G.; Carey, S.; Fausnaugh, M.; Gaudi, B. S.; Henderson, C. B.; Pogge, R. W.; Shvartzvald, Y.; Wibking, B.; Yee, J. C.; Beatty, T. G.; Eastman, J. D.; Drummond, J.; Friedmann, M.; Henderson, M.; Johnson, J. A.; Kaspi, S.; Maoz, D.; McCormick, J.; McCrady, N.; Natusch, T.; Ngan, H.; Porritt, I.; Relles, H. M.; Sliski, D. H.; Tan, T.-G.; Wittenmyer, R. A.; Wright, J. T.; Street, R. A.; Tsapras, Y.; Bramich, D. M.; Horne, K.; Snodgrass, C.; Steele, I. A.; Menzies, J.; Figuera Jaimes, R.; Wambsganss, J.; Schmidt, R.; Cassan, A.; Ranc, C.; Mao, S.; Bozza, V.; Dominik, M.; Hundertmark, M. P. G.; Jørgensen, U. G.; Andersen, M. I.; Burgdorf, M. J.; Ciceri, S.; D’Ago, G.; Evans, D. F.; Gu, S.-H.; Hinse, T. C.; Kains, N.; Kerins, E.; Korhonen, H.; Kuffmeier, M.; Mancini, L.; Popovas, A.; Rabus, M.; Rahvar, S.; Rasmussen, R. T.; Scarpetta, G.; Southworth, J.; Surdej, J.; Unda-Sanzana, E.; Verma, P.; von Essen, C.; Wang, Y.-B.; Wertz, O. (2016-05-20) - Journal article
    The microlensing event OGLE-2015-BLG-0448 was observed by Spitzer and lay within the tidal radius of the globular cluster NGC 6558. The event had moderate magnification and was intensively observed, hence it had the potential ...
  • Spitzer observations of OGLE-2015-BLG-1212 reveal a new path toward breaking strong microlens degeneracies 

    Bozza, V.; Shvartzvald, Y.; Udalski, A.; Calchi Novati, S.; Bond, I. A.; Han, C.; Hundertmark, M.; Poleski, R.; Pawlak, M.; Szymański, M. K.; Skowron, J.; Mróz, P.; Kozłowski, S.; Wyrzykowski, Ł.; Pietrukowicz, P.; Soszyński, I.; Ulaczyk, K.; Beichman, C.; Bryden, G.; Carey, S.; Fausnaugh, M.; Gaudi, B. S.; Gould, A.; Henderson, C. B.; Pogge, R. W.; Wibking, B.; Yee, J. C.; Zhu, W.; Abe, F.; Asakura, Y.; Barry, R. K.; Bennett, D. P.; Bhattacharya, A.; Donachie, M.; Freeman, M.; Fukui, A.; Hirao, Y.; Inayama, K.; Itow, Y.; Koshimoto, N.; Li, M. C. A.; Ling, C. H.; Masuda, K.; Matsubara, Y.; Muraki, Y.; Nagakane, M.; Nishioka, T.; Ohnishi, K.; Oyokawa, H.; Rattenbury, N.; Saito, To.; Sharan, A.; Sullivan, D. J.; Sumi, T.; Suzuki, D.; Tristram, P. J.; Wakiyama, Y.; Yonehara, A.; 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.; Dominik, M.; Jørgensen, U. G.; Andersen, M. I.; Bramich, D. M.; Burgdorf, M. J.; Ciceri, S.; D’Ago, G.; Evans, D. F.; Figuera Jaimes, R.; Gu, S.-H.; Hinse, T. C.; Kains, N.; Kerins, E.; Korhonen, H.; Kuffmeier, M.; Mancini, L.; Popovas, A.; Rabus, M.; Rahvar, S.; Rasmussen, R. T.; Scarpetta, G.; Skottfelt, J.; Snodgrass, C.; Southworth, J.; Surdej, J.; Unda-Sanzana, E.; von Essen, C.; Wang, Y.-B.; Wertz, O.; Maoz, D.; Friedmann, M.; Kaspi, S. (2016-03-21) - Journal article
    Spitzer microlensing parallax observations of OGLE-2015-BLG-1212decisively break a degeneracy between planetary and binary solutionsthat is somewhat ambiguous when only ground-based data are considered.Only eight viable ...
  • Spitzer observations of the thermal emission from WASP-43b 

    Blecic, Jasmina; Harrington, Joseph; Madhusudhan, Nikku; Stevenson, Kevin B.; Hardy, Ryan A.; Cubillos, Patricio E.; Hardin, Matthew; Bowman, Oliver; Nymeyer, Sarah; Anderson, David R.; Hellier, Coel; Smith, Alexis M. S.; Collier Cameron, Andrew (2014-02-01) - Journal article
    WASP-43b is one of the closest-orbiting hot Jupiters, with a semimajor axis of a = 0.01526 ± 0.00018 AU and a period of only 0.81 days.However, it orbits one of the coolest stars with a hot Jupiter (T* = 4520 ± 120 K), ...
  • Spitzer parallax of OGLE-2015-BLG-0966 : a cold Neptune in the Galactic disk 

    Street, R. A.; Udalski, A.; Novati, S. Calchi; Hundertmark, M. P G; Zhu, W.; Gould, A.; Yee, J.; Tsapras, Y.; Bennett, D. P.; Jørgensen, U. G.; Dominik, Martin; Andersen, M. I.; Bachelet, E.; Bozza, V.; Bramich, D. M.; Burgdorf, M. J.; Cassan, A.; Ciceri, S.; D'Ago, G.; Dong, Subo; Evans, D. F.; Gu, Sheng-Hong; Harkonnen, H.; Hinse, T. C.; Horne, Keith; Jaimes, R. Figuera; Kains, N.; Kerins, E.; Korhonen, H.; Kuffmeier, M.; Mancini, L.; Menzies, J.; Mao, S.; Peixinho, N.; Popovas, A.; Rabus, M.; Rahvar, S.; Ranc, C.; Rasmussen, R. Tronsgaard; Scarpetta, G.; Schmidt, R.; Skottfelt, J.; Snodgrass, C.; Southworth, J.; Steele, I. A.; Surdej, J.; Unda-Sanzana, E.; Verma, P.; von Essen, C.; Wambsganss, J.; Wang, Yi-Bo; Wertz, O.; Poleski, R.; Pawlak, M.; Szymański, M. K.; Skowron, J.; Mróz, P.; Kozłowski, S.; Wyrzykowski, Ł.; Pietrukowicz, P.; Pietrzyński, G.; Soszyński, I.; Ulaczyk, K.; Beichman, C.; Bryden, G.; Carey, S.; Gaudi, B. S.; Henderson, C. B.; Pogge, R. W.; Shvartzvald, Y.; Abe, F.; Asakura, Y.; Bhattacharya, A.; Bond, I. A.; Donachie, M.; Freeman, M.; Fukui, A.; Hirao, Y.; Inayama, K.; Itow, Y.; Koshimoto, N.; Li, M. C. A.; Ling, C. H.; Masuda, K.; Matsubara, Y.; Muraki, Y.; Nagakane, M.; Nishioka, T.; Ohnishi, K.; Oyokawa, H.; Rattenbury, N.; Saito, To; Sharan, A.; Sullivan, D. J.; Sumi, T.; Suzuki, D.; Tristram, J.; Wakiyama, Y.; Yonehara, A.; Han, C.; Choi, J-Y.; Park, H.; Jung, Y. K.; Shin, I-G. (2016-03-10) - Journal article
    We report the detection of a cold Neptune mplanet = 21 ± 2 M⊕ orbiting a 0.38 M⊙ M dwarf lying 2.5-3.3 kpc toward the Galactic center as part of a campaign combining ground-based and Spitzer observations to measure the ...
  • Spitzer Space Telescope spectra of post-AGB stars in the large magellanic Cloud - polycyclic aromatic hydrocarbons at low metallicities 

    Matsuura, M.; Bernard-Salas, J.; Lloyd Evans, Thomas Harry Hope; Volk, K.M.; Hrivnak, B.J.; Sloan, G.C.; Chu, Y.-H.; Gruendl, R.; Kraemer, K.E.; Peeters, E.; Szczerba, R.; Wood, P.R.; Zijlstra, A.A.; Hony, S.; Ita, Y.; Kamath, D.; Lagadec, E.; Parker, Q.A.; Reid, W.A.; Shimonishi, T.; Winckel, H.V.; Woods, P.M.; Kemper, F.; Meixner, M.; Otsuka, M.; Sahai, R.; Sargent, B.A.; Hora, J.L.; McDonald, I. (2014-04-01) - Journal article
    This paper reports variations of polycyclic aromatic hydrocarbons (PAHs) features that were found in Spitzer Space Telescope spectra of carbon-rich post-asymptotic giant branch (post-AGB) stars in the Large Magellanic Cloud ...
  • Spontaneous reconnection at a separator current layer : 2. Nature of the waves and flows 

    E. H. Stevenson, Julie; E. Parnell, Clare (2015-12-10) - Journal article
    Sudden destabilisations of the magnetic field, such as those caused by spontaneous reconnection, will produce waves and/or flows. Here, we investigate the nature of the plasma motions resulting from spontaneous reconnection ...
  • Spontaneous reconnection at a separator current layer : I. Nature of the reconnection 

    E. H. Stevenson, Julie; E. Parnell, Clare (2016-01-27) - Journal article
    Magnetic separators, which lie on the boundary between four topologically-distinct flux domains, are prime locations in three-dimensional magnetic fields for reconnection, especially in the magnetosphere between the planetary ...
  • The stability of low surface brightness disks based on multi-wavelength modeling 

    MacLachlan, J. M.; Matthews, L. D.; Wood, K.; Gallagher, J. S. (2011-11-01) - Journal article
    To investigate the structure and composition of the dusty interstellar medium (ISM) of low surface brightness (LSB) disk galaxies, we have used multi-wavelength photometry to construct spectral energy distributions for ...
  • Stacked Bayesian general Lomb-Scargle periodogram : identifying stellar activity signals 

    Mortier, A.; Cameron, A. Collier (2017-02-09) - Journal article
    Context. Distinguishing between a signal induced by either stellar activity or a planet is currently the main challenge in radial velocity searches for low-mass exoplanets. Even when the presence of a transiting planet and ...
  • The standard model of low-mass star formation applied to massive stars : a multi-wavelength picture of AFGL 2591 

    Johnston, K.G.; Shepherd, D.S.; Robitaille, T.P.; Wood, K. (2013-03) - Journal article
    Context. While it is currently unclear from a theoretical standpoint which forces and processes dominate the formation of high-mass stars, and hence determine the mode in which they form, much of the recent observational ...
  • Star formation in Galactic flows 

    Smilgys, Romas; Bonnell, Ian A. (2016-06-21) - Journal article
    We investigate the triggering of star formation in clouds that form in Galactic scale flows as the interstellar medium passes through spiral shocks. We use the Lagrangian nature of smoothed particle hydrodynamics simulations ...
  • Statistical evidence for the existence of Alfvénic turbulence in solar coronal loops 

    Liu, J.; Mcintosh, S.W.; De Moortel, I.; Threlfall, J.; Bethge, C. (2014-12-10) - Journal article
    Recent observations have demonstrated that waves capable of carrying large amounts of energy are ubiquitous throughout the solar corona. However, the question of how this wave energy is dissipated (on which timescales and ...