Now showing items 1-20 of 29

    • A COMPACT TWO-STEP LASER TIME-OF-FLIGHT MASS SPECTROMETER FOR IN SITU ANALYSIS OF PLANETARY SURFACES 

      Getty, Stephanie A.; Brinckerhoff, William B.; Cornish, Timothy J.; Grubisic, Andrej; Li, Xiang; Uckert, Kyle (2015-09-16)
    • A deep X-ray view of the bare AGN Ark 120 VI. Geometry of the hot corona from spectroscopic and polarization signatures 

      Marinucci, A.; Porquet, D.; Tamborra, F.; Bianchi, S.; Braito, V.; Lobban, A.; Marin, F.; Matt, G.; Middei, R.; Nardini, E.; Reeves, J.; Tortosa, A. (ESO, 2018-11-30)
      Context. The spectral shape of the hard X-ray continuum of active galactic nuclei (AGN) can be ascribed to inverse Compton scattering of optical/UV seed photons from the accretion disc by a hot corona of electrons. This ...
    • Delayed Shock-induced Dust Formation in the Dense Circumstellar Shell Surrounding the Type IIn Supernova SN 2010jl 

      Sarangi, Arkaprabha; Dwek, Eli; Arendt, Richard G. (IOP Science, 2018)
      The light curves of Type IIn supernovae are dominated by the radiative energy released through the interaction of the supernova shock waves with their dense circumstellar medium (CSM). The ultraluminous Type IIn supernova ...
    • Direct Measurement of the Cosmic-Ray Proton Spectrum from 50 GeV to 10 TeV with the Calorimetric Electron Telescope on the International Space Station 

      Adriani, O.; CALET Collaboration (American Physical Society, 2019-05-10)
      In this paper, we present the analysis and results of a direct measurement of the cosmic-ray proton spectrum with the CALET instrument onboard the International Space Station, including the detailed assessment of systematic ...
    • Energetic Particles of Cosmic Accelerators I: Galactic Accelerators 

      Venters, Tonia M.; Hamaguchi, Kenji; Brandt, Terri J.; Ajello, Marco; Blumer, Harsha; Briggs, Michael; Coppi, Paolo; D'Ammando, Filippo; Becker, Michaël De; Fields, Brian; Guiriec, Sylvain; Hewitt, John W.; Humensky, Brian; Hunter, Stanley D.; Li, Hui; Lien, Amy Y.; Longo, Francesco; Marcowith, Alexandre; McEnery, Julie; Ojha, Roopesh; Pavlidou, Vasiliki; Prescod-Weinstein, Chanda; Santander, Marcos; Tomsick, John A.; Wadiasingh, Zorawar; Walter, Roland (2019-03-11)
      The high-energy universe has revealed that energetic particles are ubiquitous in the cosmos and play a vital role in the cultivation of cosmic environments on all scales. Energetic particles in our own galaxy, galactic ...
    • Energetic Particles of Cosmic Accelerators II: Active Galactic Nuclei and Gamma-ray Bursts 

      Venters, Tonia M.; Guiriec, Sylvain; Lien, Amy Y.; Ajello, Marco; Brandt, Terri J.; Blumer, Harsha; Briggs, Michael; Coppi, Paolo; D'Ammando, Filippo; Fields, Brian; Finke, Justin; Fryer, Chris; Hamaguchi, Kenji; Harding, J. Patrick; Hewitt, John W.; Humensky, Brian; Hunter, Stanley D.; Li, Hui; Longo, Francesco; McEnery, Julie; Ojha, Roopesh; Pavlidou, Vasiliki; Petropoulou, Maria; Prescod-Weinstein, Chanda; Rani, Bindu; Santander, Marcos; Tomsick, John A.; Wadiasingh, Zorawar; Walter, Roland (2019-03-11)
      The high-energy universe has revealed that energetic particles are ubiquitous in the cosmos and play a vital role in the cultivation of cosmic environments on all scales. Though they play a key role in cultivating the ...
    • Ethane in Titan’s Stratosphere from Cassini CIRS Far- and Mid-infrared Spectra 

      Lombardo, Nicholas A.; Nixon, Conor A.; Sylvestre, Melody; Jennings, Donald E.; Teanby, Nicholas; Irwin, Patrick J. G.; Flasar, F. Michael (The American Astronomical Society, 2019-04-02)
      The Cassini Composite Infrared Spectrometer (CIRS) observed thermal emission in the far- and mid-infrared (from 10 to 1500 cm⁻¹), enabling spatiotemporal studies of ethane on Titan across the span of the Cassini mission ...
    • The Event Horizon General Relativistic Magnetohydrodynamic Code Comparison Project 

      Porth, Oliver; Chatterjee, Koushik; Narayan, Ramesh (2019-04-11)
      Recent developments in compact object astrophysics, especially the discovery of merging neutron stars by LIGO, the imaging of the black hole in M87 by the Event Horizon Telescope (EHT) and high precision astrometry of the ...
    • Fabrication of a Hybrid Transition Edge Sensor Array for Lynx 

      Wassell, Edward; Adams, Joseph S.; Bandler, Simon R.; Chang, Meng-Ping; Chervenak, James A.; Datesman, Aaron M.; Eckart, Megan E.; Ewin, Audrey J.; Finkbeiner, Fred M.; Yoon Ha, Jong; Kelley, R.; Kilbourne, Caroline A.; Miniussi, Antoine R.; Porter, F.; Sadleir, John E.; Sakai, Kazuhiro; Smith, Stephen J.; Wakehan, Nicholas
    • Flaring, Dust Formation, And Shocks In The Very Slow Nova ASASSN-17pf (LMCN 2017-11a) 

      Aydi, E.; Chomiuk, L.; Strader, J.; Swihart, S. J.; Bahramian, A.; Harvey, E. J.; Britt, C. T.; Buckley, D. A. H.; Chen, P.; Dage, K.; Darnley, M. J.; Dong, S.; Hambsch, F-J.; Holoien, T. W.-S.; Jha, S. W.; Kochanek, C. S.; Kuin, N. P. M.; Li, K. L.; Monard, L. A. G.; Mukai, K.; Page, K. L.; Prieto, J. L.; Richardson, N. D.; Shappee, B. J.; Shishkovsky, L.; Sokolovsky, K. V.; Stanek, K. Z.; Thompson, T. (2019-03-21)
      We present a detailed study of the 2017 eruption of the classical nova ASASSN-17pf (LMCN 2017-11a), which is located in the Large Magellanic Cloud, including data from AAVSO, ASAS-SN, SALT, SMARTS, SOAR, and the Neil Gehrels ...
    • High-Energy Polarimetry - a new window to probe extreme physics in AGN jets 

      Rani, B.; Zhang, H.; Hunter, S. D.; Kislat, F.; Böttcher, M.; McEnery, J. E.; Thompson, D. J.; Giannios, D.; Guo, F.; Li, H.; Baring, M.; Agudo, I.; Buson, S.; Petropoulou, M.; Pavlidou, V.; Angelakis, E.; Myserlis, I.; Wadiasingh, Z.; Silva, R. M. Curado da; Kilian, P.; Guiriec, S.; Bozhilov, V. V.; Hodgson, J.; Antón, S.; Kazanas, D.; Coppi, P.; Venters, T.; Longo, F.; Bottacini, E.; Ojha, R.; Zhang, B.; Ciprini, S.; Moiseev, A.; Shrader, C. (2019-03-11)
      The constantly improving sensitivity of ground-based and space-borne observatories has made possible the detection of high-energy emission (X-rays and gamma-rays) from several thousands of extragalactic sources. Enormous ...
    • Kiloparsec-scale Jets: Physics, Emission Mechanisms, and Challenges 

      Perlman, Eric S.; Meyer, Eileen; Eilek, Jean; Tchekhovskoy, Sasha; Nyland, Kristina; Agudo, Ivan; Baum, Stefi; Hardcastle, Martin; Kadler, Matthias; Labiano, Alvaro; Marshall, Herman; O’Dea, Christopher; Worrall, Diana (2019-03-08)
      Jets are a ubiquitous part of the accretion process, created in AGN, by a coupling between the magnetic field near the central black hole and inflowing material. We point out what advances can be achieved by new technologies, ...
    • Multi-Physics of AGN Jets in the Multi-Messenger Era 

      Rani, B.; Petropoulou, M.; Zhang, H.; D'Ammando, F.; Finke, J.; Baring, M.; Böttcher, M.; Dimitrakoudis, S.; Gan, Z.; Giannios, D.; Hartmann, D. H.; Krichbaum, T. P.; Marscher, A. P.; Mastichiadis, A.; Nalewajko, K.; Ojha, R.; Paneque, D.; Shrader, C.; Sironi, L.; Tchekhovskoy, A.; Thompson, D. J.; Vlahakis, N.; Venters, T. M. (2019-03-11)
      Active galactic nuclei (AGN) with relativistic jets, powered by gas accretion onto their central supermassive black hole (SMBH), are unique laboratories for studying the physics of matter and elementary particles in extreme ...
    • Neutrinos, Cosmic Rays and the MeV Band 

      Ojha, R.; Zhang, H.; Kadler, M.; Neilson, N. K.; Kreter, M.; McEnery, J.; Buson, S.; Caputo, R.; Coppi, P.; D'Ammando, F.; Angelis, A. De; Fang, K.; Giannios, D.; Guiriec, S.; Guo, F.; Kopp, J.; Krauss, F.; Li, H.; Meyer, M.; Moiseev, A.; Petropoulou, M.; Prescod-Weinstein, C.; Rani, B.; Shrader, C.; Venters, T.; Wadiasingh, Z. (2019-03-13)
      The possible association of the blazar TXS 0506+056 with a high-energy neutrino detected by IceCube holds the tantalizing potential to answer three astrophysical questions: 1. Where do high-energy neutrinos originate? 2. ...
    • NuSTAR Detection of X-rays Concurrent with Gamma Rays in the Nova V5855 Sgr 

      Nelson, Thomas; Mukai, Koji; Li, Kwan-Lok; Vurm, Indrek; Metzger, Brian D.; Chomiuk, Laura; Sokoloski, J.L.; Linford, Justin D.; Bohlsen, Terry; Luckas, Paul (2018-12-31)
      We report the first detection of hard (>10 keV) X-ray emission simultaneous with gamma rays in a nova eruption. Observations of the nova V5855 Sgr carried out with the NuSTAR satellite on Day 12 of the eruption revealed ...
    • Observing the transient pulsations of SMC X-1 with NuSTAR 

      Pike, Sean N.; Harrison, Fiona A.; Bachetti, Matteo; Brumback, McKinley C.; Fürst, Felix S.; Madsen, Kristin K.; Pottschmidt, Katja; Tomsick, John A.; Wilms, Jörn (2019-03-15)
      We report on NuSTAR observations of transient pulsations in the neutron star X-ray binary SMC X-1. The transition from non-pulsing to pulsing states was not accompanied by a large change in flux. Instead, both pulsing and ...
    • On the Nature of the High-Energy Rollover in 1H 0419-577 

      Turner, T, J.; Reeves, J. N.; Braito, V,; Costa, M. (Oxford Academic, 2018)
      A NuSTAR/Swift observation of the luminous Seyfert 1 galaxy 1H 0419-577 taken during 2015 reveals one of the most extreme high energy cut-offs observed to date from an AGN - an origin due to thermal Comptonization would ...
    • The Physics of Accretion Onto Highly Magnetized Neutron Stars 

      Wolff, Michael T.; Becker, Peter A.; Coley, Joel; Fürst, Felix; Guillot, Sebastien; Harding, Alice; Hemphill, Paul; Jaisawal, Gaurava K.; Kretschmar, Peter; Kühnel, Matthias Bissinger né; Malacaria, Christian; Pottschmidt, Katja; Rothschild, Richard; Staubert, Rüdiger; Tomsick, John; West, Brent; Wilms, Jörn; Wilson-Hodge, Colleen; Wood, Kent (2019-03-29)
      Studying the physical processes occurring in the region just above the magnetic poles of strongly magnetized, accreting binary neutron stars is essential to our understanding of stellar and binary system evolution. Perhaps ...
    • Principal component analysis of up-the-ramp sampled infrared array data 

      Rauscher, Bernard J.; Arendt, Richard G.; Fixsen, Dale J.; Kutyrev, Alexander; Mosby, Gregory; Moseley, Samuel H. (SPIE, 2019-04-09)
      We describe the results of principal component analysis (PCA) of up-the-ramp sampled infrared (IR) array data from the Hubble Space Telescope wide field camera 3 (WFC3 IR), James Webb Space Telescope NIRSpec, and prototype ...