Now showing items 1-20 of 7213

    • The 04 – 10 September 2017 Sun–Earth Connection Events: Solar Flares, Coronal Mass Ejections/Magnetic Clouds, and Geomagnetic Storms 

      Wu, Chin-Chun; Liou, Kan; Lepping, Ronald P.; Hutting, Lynn (Springer Netherlands, 2019-08-23)
      In early September 2017, a series of solar flares and coronal mass ejections (CMEs) erupted from the Sun. The Cor2a coronagraph, a unit of the Sun Earth Connection Coronal and Heliospheric Investigation (SECCHI), onboard ...
    • 150 years of the geography of innovation 

      Andrews, Michael J.; Whalley, Alexander (Elsevier, 2021-01-25)
      Innovation has long been seen as central to long-term regional growth. Due to the absence of comprehensive data on the geography of innovation covering long time periods, quantifying long-term innovation-development linkages ...
    • The 17 April 2021 widespread solar energetic particle event 

      Dresing, N.; Rodríguez-García, L.; Jebaraj, I. C.; Warmuth, A.; Krupar, Vratislav; Silva, Daniel da; et al (2023-03-20)
      Context. A complex and long-lasting solar eruption on 17 April 2021 produced a widespread Solar Energetic Particle (SEP) event that was observed by five longitudinally well-separated observers in the inner heliosphere ...
    • 17β-Estradiol (E2) may be involved in the mode of crustacean female sex hormone (CFSH) action in the blue crab, Callinectes sapidus 

      Wang, Tao; He, Ke; Blaney, Lee; Chung, J. Sook (Frontiers, 2022-07-25)
      17β-estradiol (E2) has been proved to control reproduction, sexual differentiation, and the development of the secondary sexual characteristics of vertebrate females. In decapod crustacean species, crustacean female ...
    • A 1D fluid model of the Centaurus A jet 

      Wykes, Sarka; Snios, Bradford T.; Nulsen, Paul E. J.; Kraft, Ralph P.; Birkinshaw, Mark; Hardcastle, Martin J.; Worrall, Diana M.; McDonald, Iain; Rejkuba, Marina; Jones, Thomas W.; Stark, David J.; Forman, William R.; Meyer, Eileen T.; Jones, Christine (2018-09-27)
      We implement a steady, one-dimensional flow model for the X-ray jet of Centaurus A in which entrainment of stellar mass loss is the primary cause of dissipation. Using over 260 ks of new and archival Chandra/ACIS data, we ...
    • 1E 1740.7-2942 (the Great Annihilator) enters a low-intensity state 

      Kuulkers, E.; Ferrigno, C.; Santo, M. Del; Bazzano, A.; Alfonso-Garzon, J.; Beckmann, V.; Bird, A. J.; Brandt, S.; Chenevez, J.; Courvoisier, T. J.-L.; Domingo, A.; Ebisawa, K.; Jonker, P. G.; Kretschmar, P.; Markwardt, C. B.; Oosterbroek, T.; Paizis, A.; Pottschmidt, Katja; Sanchez-Fernandez, C.; Wijnands, R. (The Astronomer's Telegram, 2012-10-09)
    • 2 mm GISMO Observations of the Galactic Center. I. Dust Emission 

      Arendt, Richard G; Staguhn, Johannes; Dwek, Eli; Morris, Mark R; Yusef-Zadeh, Farhad; Benford, Dominic J; Kovacs, Attila; Gonzalez-Quiles, Junellie (The American Astronomical Society, 2019-11-01)
      The Central Molecular Zone (CMZ), covering the inner ∼ 1 ◦ of the Galactic plane has been mapped at 2 mm using the GISMO bolometric camera on the 30 m IRAM telescope. The 2100 resolution maps show abundant emission from ...
    • 2 mm GISMO Observations of the Galactic Center. II. A Nonthermal Filament in the Radio Arc and Compact Sources 

      Staguhn, Johannes; Arendt, Richard G; Dwek, Eli; Morris, Mark R; Yusef-Zadeh, Farhad; Benford, Dominic J; Kovacs, Attila; Gonzalez-Quiles, Junellie (The American Astronomical Society, 2019-11-01)
      We have used the Goddard IRAM 2-Millimeter Observer (GISMO) with the 30 m IRAM telescope to carry out a 2 mm survey of the Galaxy’s central molecular zone (CMZ). These observations detect thermal emission from cold ISM ...
    • 20 years of change in tundra NDVI from coupled field and satellite observations 

      Huemmrich, Karl; Gamon, John; Campbell, Petya Entcheva; Mora, Marianna; Vargas Z, Sergio; Almanza, Brenda; Tweedie, Craig (IOP Publishing, 2023-08-17)
      In 2022 we resampled normalized difference vegetation index (NDVI) along a 100 m transect in tundra near Utqiagvik, AK that had been previously measured through the 2000–2002 growing seasons, providing an opportunity to ...

      Williams, Peter K. G.; Tomsick, John A.; Bodaghee, Arash; Bower, Geoffrey C.; Pooley, Guy G.; Pottschmidt, Katja; Rodriguez, Jérôme; Wilms, Jörn; Migliari, Simone; Trushkin, Sergei A. (IOP Publishing, 2011-05-05)
      In 2009, Cygnus X-3 (Cyg X-3) became the first microquasar to be detected in the GeV γ-ray regime, via the satellites Fermi and AGILE. The addition of this new band to the observational toolbox holds promise for building ...
    • The 2013 FLEX—US Airborne Campaign at the Parker Tract Loblolly Pine Plantation in North Carolina, USA 

      Middleton, Elizabeth M.; Rascher, Uwe; Corp, Lawrence A.; Huemmrich, Karl; Cook, Bruce D.; Noormets, Asko; Schickling, Anke; Pinto, Francisco; Alonso, Luis; Damm, Alexander; Guanter, Luis; Colombo, Roberto; Campbell, Petya Entcheva; Landis, David R.; Zhang, Qingyuan; Rossini, Micol; Schuettemeyer, Dirk; Bianchi, Remo (MDPI, 2017-06-16)
      The first European Space Agency (ESA) and NASA collaboration in an airborne campaign to support ESA’s FLuorescence EXplorer (FLEX) mission was conducted in North Carolina, USA during September–October 2013 (FLEX-US 2013) ...
    • The 2019 outburst of the 2005 classical nova V1047 Cen: a record breaking dwarf nova outburst or a new phenomenon? 

      Aydi, E.; Sokolovsky, K. V.; Bright, J. S.; Tremou, E.; Nyamai, M. M.; Evans, A.; Strader, J.; Chomiuk, L.; Myers, G.; Hambsch, F-J.; Page, K. L.; Buckley, D. A. H.; Woodward, C. E.; Walter, F. M.; Mróz, P.; Vallely, P. J.; Geballe, T. R.; Banerjee, D. P. K.; Gehrz, R. D.; Fender, R. P.; Gromadzki, M.; Kawash, A.; Knigge, C.; Mukai, K.; Munari, U.; Orio, M.; Ribeiro, V. A. R. M.; Sokoloski, J. L.; Starrfield, S.; Udalski, A.; Woudt, P. A. (2021-08-17)
      We present a detailed study of the 2019 outburst of the cataclysmic variable V1047 Cen, which hosted a classical nova eruption in 2005. The peculiar outburst occurred 14 years after the classical nova event, lasted for ...
    • 2021 AHLA Tax Issues for Health Care Organizations 

      Fine, Michael N.; Woodcock, Cynthia H. (2021-10)
    • 2021 Effective Area calibration of the Nuclear Spectroscopic Telescope ARray (NuSTAR) 

      Madsen, Kristin; Forster, Karl; Grefenstette, Brian W.; Harrison, Fiona A.; Miyasaka, Hiromasa (SPIE, 2021-10-21)
      We present here the updated calibration of The Nuclear Spectroscopic Telescope ARray NuSTAR, which was performed using data on the Crab accumulated over the last 9 years in orbit. The basis for this new calibration contains ...
    • 2021 Roadmap on Neuromorphic Computing and Engineering 

      Mazumder, Arnab Neelim; Hosseini, Morteza; Mohsenin, Tinoosh; et al. (IOP Publishing, 2021-05-12)
      Modern computation based on the von Neumann architecture is today a mature cutting-edge science. In this architecture, processing and memory units are implemented as separate blocks interchanging data intensively and ...
    • The 21-cm signal from the Cosmic Dawn: metallicity dependence of high mass X-ray binaries 

      Kaur, Harman Deep; Qin, Yuxiang; Mesinger, Andrei; Pallottini, Andrea; Fragos, Tassos; Basu-Zych, Antara (2022-03-21)
      X-rays from High-Mass X-ray Binaries (HMXBs) are likely the main source of heating of the intergalactic medium (IGM) during Cosmic Dawn (CD), before the completion of reionization. This Epoch of Heating (EoH; z∼10−15) ...
    • The 27-day rotational variations in total solar irradiance observations: From SORCE/TIM, ACRIMSAT/ACRIM III, and SOHO/VIRGO 

      Lee, Jae N.; Cahalan, Robert F.; Wu, Dong L. (Elsevier, 2015-07-09)
      During the last decade, observations from SORCE (Solar Radiation and Climate Experiment)/TIM (Total Irradiance Monitor), ACRIMSAT (Active Cavity Radiometer Irradiance Monitor Satellite)/ACRIM III, and SOHO (Solar and ...
    • 3 Kinds of Nouns: Counting is Not Always the Issue 

      Nelson, John; Wowk, Tymofey (Originally published by:, 2012)
    • A 3 pc Scale Jet-driven Outflow from Sgr A* 

      Yusef-Zadeh, F.; Arendt, Richard; Bushouse, H.; Cotton, W.; Haggard, D.; Pound, M. W.; Roberts, D. A.; Royster, M.; Wardle, M. (IOP Science, 2012-09-21)
      The compact radio source Sgr A* is coincident with a 4 × 106 M☉ black hole at the dynamical center of the Galaxy and is surrounded by dense orbiting ionized and molecular gas. We present high-resolution radio continuum ...
    • The 32-year record-high surface melt in 2019/2020 on the northern George VI Ice Shelf, Antarctic Peninsula 

      Banwell, Alison F.; Datta, Rajashree Tri; Dell, Rebecca L.; Moussavi, Mahsa; Brucker, Ludovic; Picard, Ghislain; Shuman, Christopher A.; Stevens, Laura A. (Copernicus Publications, 2020-10-22)
      In the 2019/2020 austral summer, the surface melt duration and extent on the northern George VI Ice Shelf (GVIIS) was exceptional compared to the 31 previous summers of dramatically lower melt. This finding is based on ...