Zobrazeno 81 - 90
of 569
pro vyhledávání: '"Psaltis, Dimitrios"'
Autor:
Psaltis, Dimitrios, Narayan, Ramesh, Fish, Vincent L., Broderick, Avery E., Loeb, Abraham, Doeleman, Sheperd S.
Observations of the black hole in the center of the Milky Way with the Event Horizon Telescope at 1.3 mm have revealed a size of the emitting region that is smaller than the size of the black-hole shadow. This can be reconciled with the spectral prop
Externí odkaz:
http://arxiv.org/abs/1409.5447
Autor:
Fish, Vincent L., Johnson, Michael D., Lu, Ru-Sen, Doeleman, Sheperd S., Bouman, Katherine L., Zoran, Daniel, Freeman, William T., Psaltis, Dimitrios, Narayan, Ramesh, Pankratius, Victor, Broderick, Avery E., Gwinn, Carl R., Vertatschitsch, Laura E.
The image of the emission surrounding the black hole in the center of the Milky Way is predicted to exhibit the imprint of general relativistic (GR) effects, including the existence of a shadow feature and a photon ring of diameter ~50 microarcsecond
Externí odkaz:
http://arxiv.org/abs/1409.4690
We calculate the rotational broadening in the observed thermal spectra of neutron stars spinning at moderate rates in the Hartle-Thorne approximation. These calculations accurately account for the effects of the second-order Doppler boosts as well as
Externí odkaz:
http://arxiv.org/abs/1407.3277
Akademický článek
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Akademický článek
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Autor:
Chakrabarty, Deepto, Tomsick, John A., Grefenstette, Brian W., Psaltis, Dimitrios, Bachetti, Matteo, Barret, Didier, Boggs, Steven E., Christensen, Finn E., Craig, William W., Fuerst, Felix, Hailey, Charles J., Harrison, Fiona A., Kaspi, Victoria A., Miller, Jon M., Nowak, Michael A., Rana, Vikram, Stern, Daniel, Wik, Daniel R., Wilms, Joern, Zhang, William W.
The low-mass X-ray binary Cen X-4 is the brightest and closest (<1.2 kpc) quiescent neutron star transient. Previous 0.5-10 keV X-ray observations of Cen X-4 in quiescence identified two spectral components: soft thermal emission from the neutron sta
Externí odkaz:
http://arxiv.org/abs/1403.6751
Black hole binaries exhibit a wide range of variability phenomena, from large-scale state changes to broadband noise and quasi-periodic oscillations, but the physical nature of much of this variability is poorly understood. We examine the variability
Externí odkaz:
http://arxiv.org/abs/1312.3333
The advent of the Event Horizon Telescope (EHT), a millimeter-wave very-long baseline interferometric array, has enabled spatially-resolved studies of the sub-horizon-scale structure for a handful of supermassive black holes. Among these, the superma
Externí odkaz:
http://arxiv.org/abs/1311.5564
Modeling the amplitudes and shapes of the X-ray pulsations observed from hot, rotating neutron stars provides a direct method for measuring neutron-star properties. This technique constitutes an important part of the science case for the forthcoming
Externí odkaz:
http://arxiv.org/abs/1311.1571
Autor:
Fish, Vincent, Alef, Walter, Anderson, James, Asada, Keiichi, Baudry, Alain, Broderick, Avery, Carilli, Chris, Colomer, Francisco, Conway, John, Dexter, Jason, Doeleman, Sheperd, Eatough, Ralph, Falcke, Heino, Frey, Sándor, Gabányi, Krisztina, Gálvan-Madrid, Roberto, Gammie, Charles, Giroletti, Marcello, Goddi, Ciriaco, Gómez, Jose L., Hada, Kazuhiro, Hecht, Michael, Honma, Mareki, Humphreys, Elizabeth, Impellizzeri, Violette, Johannsen, Tim, Jorstad, Svetlana, Kino, Motoki, Körding, Elmar, Kramer, Michael, Krichbaum, Thomas, Kudryavtseva, Nadia, Laing, Robert, Lazio, Joseph, Loeb, Abraham, Lu, Ru-Sen, Maccarone, Thomas, Marscher, Alan, Mart'ı-Vidal, Iván, Martins, Carlos, Matthews, Lynn, Menten, Karl, Miller, Jon, Miller-Jones, James, Mirabel, Félix, Muller, Sebastien, Nagai, Hiroshi, Nagar, Neil, Nakamura, Masanori, Paragi, Zsolt, Pradel, Nicolas, Psaltis, Dimitrios, Ransom, Scott, Rodríguez, Luis, Rottmann, Helge, Rushton, Anthony, Shen, Zhi-Qiang, Smith, David, Stappers, Benjamin, Takahashi, Rohta, Tarchi, Andrea, Tilanus, Remo, Verbiest, Joris, Vlemmings, Wouter, Walker, R. Craig, Wardle, John, Wiik, Kaj, Zackrisson, Erik, Zensus, J. Anton
An international consortium is presently constructing a beamformer for the Atacama Large Millimeter/submillimeter Array (ALMA) in Chile that will be available as a facility instrument. The beamformer will aggregate the entire collecting area of the a
Externí odkaz:
http://arxiv.org/abs/1309.3519