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14.Energetic Cosmos Laboratory

14.Energetic Cosmos Laboratory

 

ECL is an astrophysics laboratory founded by Nobel Prize Winner George Smoot in 2017, with the goal to understand fundamental problems in physics and astrophysics and contribute to the technical know-how and innovation ecosystem of NU. ECL includes a number of research facilities: We created and run the NU Transient Telescope for our optical observations of fast transients; these were developed mostly in our optics lab. We have a cryogenic detector facility including an electronics testing and assembly lab, and a clean room facility, where we principally work on MKIDs devices. We also have a small shop where we can do some CNC machining and 3D resin printing for the fabrication of our experimental equipment. ECL does original academic research in our 5 basic areas of Theory, Data Science, Telescope Observations, Cryogenic Detectors, and Ultra-Fast Astronomy (UFA). We tend to concentrate on topics relevant to cosmology, gravity, and high-energy astrophysical processes.

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Recent Submissions

  • Good, Michael R. R.; Singha, Chiranjeeb; Zarikas, Vasilios (Entropy, 2022)
    We examine the extreme situation of radiation from an electron that is asymptotically accelerated to the speed of light, resulting in finite emission energy. The analytic solution explicitly demonstrates the difference ...
  • Panamarev, Taras; Kocsis, Bence (Monthly Notices of the Royal Astronomical Society, 2022)
    We explore the dynamics of stellar discs in the close vicinity of a supermassive black hole (SMBH) by means of direct N-body simulations. We show that an isolated nuclear stellar disc exhibits anisotropic mass segregation ...
  • Sobolenko, M; Kompaniiets, O; Berczik, P; Marchenko, V; Vasylenko, A; Fedorova, E; Shukirgaliyev, B (Monthly Notices of the Royal Astronomical Society, 2022)
    The main idea of our research is to estimate the physical coalescence time of the double supermassive black hole (SMBH) system in the centre of NGC 6240 based on the X-ray observations from the Chandra space observatory. ...
  • Pozo, Alvaro; Broadhurst, Tom; Emami, Razieh; Smoot, George (Monthly Notices of the Royal Astronomical Society, 2022)
    The unusually large ‘dwarf’ galaxy Crater II, with its small velocity dispersion, ≃3 km s−1, defies expectations that low-mass galaxies should be small and dense. We combine the latest stellar and velocity dispersion ...
  • Denissenya, Mikhail; Linder, Eric V. (Journal of Cosmology and Astroparticle Physics, 2022)
    Ongoing and future redshift surveys have the capability to measure the growth rate of large scale structure at the percent level over a broad range of redshifts, tightly constraining cosmological parameters. Beyond general ...
  • Sharma, Divij; Linder, Eric V. (Journal of Cosmology and Astroparticle Physics, 2022)
    Double source lensing, with two sources lensed by the same foreground galaxy, involves the distance between each source and the lens and hence is a probe of the universe away from the observer. The double source distance ...
  • Denissenya, Mikhail; Linder, Eric V (Monthly Notices of the Royal Astronomical Society, 2022)
    Gravitationally lensed sources may have unresolved or blended multiple images, and for time varying sources, the light curves from individual images can overlap. We use convolutional neural nets to both classify the light ...
  • Denissenya, Mikhail; Bag, Satadru; Kim, Alex G; Linder, Eric V; Shafieloo, Arman (Monthly Notices of the Royal Astronomical Society, 2022)
    Gravitationally lensed Type Ia supernovae are an emerging probe with great potential for constraining dark energy, spatial curvature, and the Hubble constant. The multiple images and their time delayed and magnified fluxes ...
  • Fernandez-Silvestre, Diego; Foo, Joshua; Good, Michael R.R. (Classical and Quantum Gravity, 2022)
    The Schwarzschild-de Sitter (SdS) metric is the simplest spacetime solution in general relativity with both a black hole event horizon and a cosmological event horizon. Since the Schwarzschild metric is the most ...
  • Gennaro, Sofia Di; Good, Michael R. R.; Ong, Yen Chin (PHYSICAL REVIEW RESEARCH, 2022)
    We show that the notion of “Hookean law” F = kx, suitably defined in asymptotically flat singly spinning Myers-Perry black hole space-times in dimensions d 5, is related to the Emparan-Myers fragmentation (splitting ...
  • Liao, Kai; Shafieloo, Arman; Keeley, Ryan E.; Linder, Eric V. (arxiv, 2020)
    We determine the Hubble constant H0 precisely (2.3% uncertainty) in a manner independent of cosmological model through Gaussian process regression, using strong lensing and supernova data. Strong gravitational lensing ...
  • Li, Siyang; Smoot, George F. (arxiv, 2020)
    We characterized the S14160-3050HS Multi-Pixel Photon Counter (MPPC), a high efficiency, single channel silicon photomultiplier manufactured by Hamamatsu Photonics K.K. All measurements were performed at a room temperature ...
  • Lau, Albert Wai Kit; Shafiee, Mehdi; Smoot, George F.; Grossan, Bruce; Li, Siyang; Maksut, Zhanat (arxiv, 2020)
    In our Ultra-Fast Astronomy (UFA) program, we aim to improve measurements of variability of astro nomical targets on millisecond and shorter time scales. In this work, we present initial on-sky measurements of the performance ...
  • Zhakenuly, Abay; Good, Michael R.R.; Linder, Eric V. (arxiv, 2020)
    An accelerated boundary correspondence (ABC) is solved for the de Sitter moving mirror cos mology. The beta Bogoliubov coefficients reveal the particle spectrum is a Planck distribution with temperature inversely proportional ...
  • Good, Michael R.R. (arxiv, 2020)
    Modeling the collapse of an extreme Reissner-Nordstr¨om (ERN) black hole by solving the corre sponding moving mirror model for the trajectory that asymptotically approaches uniform accelera tion, we obtain the non-zero ...
  • Brando, Guilherme; Linder, Eric V. (PHYSICAL REVIEW D, 2020)
    Perturbations from inflation evolve into large scale structure of the late universe, and encode abundant cosmic structure formation physics. We allow freedom in the primordial power spectrum, rather than assuming a power ...
  • Linder, Eric V. (PHYSICAL REVIEW D, 2020)
    Fast radio bursts (FRBs) probe the electron density of the universe along the path of propagation, making high redshift FRB sensitive to the helium reionization epoch. We analyze the signal to noise with which a detection ...
  • Kim, Alex G.; Linder, Eric V. (PHYSICAL REVIEW D, 2020)
    Peculiar-velocity surveys of the low-redshift universe have significant leverage to constrain the growth rate of cosmic structure and test gravity. Wide-field imaging surveys combined with multiobject spectrographs [e.g., ...