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Related papers: The Black Hole Explorer Cryocooling Instrument

200 papers

The Event Horizon Telescope is a millimeter VLBI array that aims to take the first pictures of the black holes in the center of the Milky Way and of the M87 galaxy, with horizon scale resolution. Measurements of the shape and size of the…

High Energy Astrophysical Phenomena · Physics 2020-01-08 Dimitrios Psaltis

Observational evidence for black hole spin down has been found in the normalized light curves of long GRBs in the BATSE catalogue. Over the duration $T_{90}$ of the burst, matter swept up by the central black hole is susceptible to…

General Relativity and Quantum Cosmology · Physics 2015-03-17 Maurice H. P. M. van Putten , Nobuyuki Kanda , Hideyuki Tagoshi , Daisuke Tatsumi , Fujimoto Masa-Katsu , Massimo Della Valle

While driven interacting quantum matter is generically subject to heating and scrambling, certain classes of systems evade this paradigm. We study such an exceptional class in periodically driven critical (1 + 1)-dimensional systems with a…

Strongly Correlated Electrons · Physics 2020-05-06 Bastien Lapierre , Kenny Choo , Clément Tauber , Apoorv Tiwari , Titus Neupert , Ramasubramanian Chitra

Black holes hold a tremendous discovery potential. In this paper the extent to which the Event Horizon Telescope and its next generation upgrade can resolve their structure is quantified. Black holes are characterized by a perfectly…

General Relativity and Quantum Cosmology · Physics 2022-11-16 Raúl Carballo-Rubio , Vitor Cardoso , Ziri Younsi

We exactly calculate the thermal distribution and temperature of Hawking radiation for a two-dimensional charged dilatonic black hole after it has settled down to an "equilibrium" state. The calculation is carried out using the Bogoliubov…

High Energy Physics - Theory · Physics 2008-11-26 T. Christodoulakis , G. A. Diamandis , B. C. Georgalas , E. C. Vagenas

We developed a system that continuously maintains a cryocooler for long periods on a rotating table. A cryostat that holds the cryocooler is set on the table. A compressor is located on the ground and supplies high-purity (> 99.999%) and…

Instrumentation and Methods for Astrophysics · Physics 2014-07-21 Shugo Oguri , Jihoon Choi , Masanori Kawai , Osamu Tajima

A fraction of the active supermassive black holes at the centers of galaxies in our Universe are capable of launching extreme kiloparsec-long relativistic jets. These jets are known multiband (radio to $\gamma$-ray) and multimessenger…

We consider the black hole (BH) shadow images which can be restored by data processing and image recovery procedures in future space Very Large Baseline Interferometry (VLBI) missions. For Kerr BHs with masses and coordinates of SgrA*, M87*…

Astrophysics of Galaxies · Physics 2020-08-26 E. V. Mikheeva , S. V. Repin , V. N. Lukash

The nature of black hole jets at the lowest detectable luminosities remains an open question, largely due to a dearth of observational constraints. Here, we present a new, nearly-simultaneous broadband spectrum of the black hole X-ray…

Future sky surveys in the mm/sub-mm range, like the forthcoming balloon-borne missions LSPE, OLIMPO, SPIDER etc., will need detectors insensitive to cosmic rays (CRs) and with a NEP of the order of $10^{-17} \div 10^{-18}\,$W/sqrt(Hz). The…

Instrumentation and Methods for Astrophysics · Physics 2014-10-23 Maria Salatino , Paolo de Bernardis , Sumedh Mahashabde , Leonid S. Kuzmin , Silvia Masi

Micro-X is a NASA-funded, sounding rocket-borne X-ray imaging spectrometer that will allow high precision measurements of velocity structure, ionization state and elemental composition of extended astrophysical systems. One of the biggest…

Instrumentation and Methods for Astrophysics · Physics 2015-06-17 Sarah N. T. Heine , Enectali Figueroa-Feliciano , John M. Rutherford , Patrick Wikus , Phil Oakley , Frederick S. Porter , Dan McCammon

The Event Horizon Telescope (EHT), a global sub-millimeter wavelength very long baseline interferometry array, is now resolving the innermost regions around the supermassive black holes Sgr A* and M87. Using black hole images from both…

High Energy Astrophysical Phenomena · Physics 2015-06-23 Angelo Ricarte , Jason Dexter

The Event Horizon Telescope (EHT) is a millimeter very long baseline interferometry (VLBI) array that has imaged the apparent shadows of the supermassive black holes M87* and Sagittarius A*. Polarimetric data from these observations contain…

A finite temperature extension of the effective holographic models for QCD (EHQCD), proposed in Ref.[1], is investigated in the present work. EHQCD models are characterized by two parameters, the conformal dimension of the relevant operator…

High Energy Physics - Theory · Physics 2021-08-25 Alfonso Ballon-Bayona , Luis A. H. Mamani , Alex S. Miranda , Vilson T. Zanchin

Constraining the primary growth channel of supermassive black holes (SMBH) remains one the most actively debated questions in the context of cosmological structure formation. Owing to the expected connection between SMBH spin parameter…

A criterion of thermal stability is derived for electrically charged quantum} black holes having large horizon area (compared to Planck area), as an inequality between the mass of the black hole and its microcanonical entropy. The…

General Relativity and Quantum Cosmology · Physics 2012-06-07 Abhishek Majhi , Parthasarathi Majumdar

We report on the design and performance of the BICEP2 instrument and on its three-year data set. BICEP2 was designed to measure the polarization of the cosmic microwave background (CMB) on angular scales of 1 to 5 degrees ($\ell$=40-200),…

The Event Horizon Telescope, an Earth-sized interferometer, aims to capture an image of a black hole's event horizon to test the theory of general relativity and probe accretion processes.

High Energy Astrophysical Phenomena · Physics 2017-10-10 Sheperd Doeleman

We review the recent multifrequency studies of galactic black hole binaries, aiming at revealing the underlying emission processes and physical properties in these systems. The optical and infrared observations are important for determining…

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