Publications (16)
The black hole candidate XTE J1752-223 towards and in quiescence: optical and simultaneous X-ray - radio observations
E. M. Ratti, P. G. Jonker, J. C. A. Miller-Jones +10
We present optical, X-ray and radio observations of the black hole transient (BHT) XTE J1752-223 towards and in quiescence. Optical photometry shows that the quiescent magnitude of…
Chandra and RXTE Observations of 1E 1547.0-5408: Comparing the 2008 and 2009 Outbursts
C. -Y. Ng, V. M. Kaspi, R. Dib +6
We present results from observations of the magnetar 1E 1547.0-5408 (SGR J1550-5418) taken with the Chandra X-ray Observatory and the Rossi X-ray Timing Explorer (RXTE) following t…
Location of the bow shock ahead of cloud G2 at the Galactic Center
A. Sadowski, R. Narayan, L. Sironi +1
We perform detailed magnetohydrodynamic simulations of the gas cloud G2 interacting with the accretion flow around the Galactic Center black hole Sgr A*. We take as our initial con…
LOFT: the Large Observatory For X-ray Timing
M. Feroci, J. W. den Herder, E. Bozzo +245
The LOFT mission concept is one of four candidates selected by ESA for the M3 launch opportunity as Medium Size missions of the Cosmic Vision programme. The launch window is curren…
Constraining Radiatively Inefficient Accretion Flows with Polarization
D. R. Ballantyne, F. Ozel, D. Psaltis
The low-luminosity black hole Sgr A* provides a testbed for models of Radiatively Inefficient Accretion Flows (RIAFs). Recent sub-millimeter linear polarization measurements of Sgr…
Precise Localization of the Soft Gamma Repeater SGR 1627-41 and the Anomalous X-ray Pulsar AXP 1E1841-045 with Chandra
S. Wachter, S. Patel, C. Kouveliotou +7
We present precise localizations of AXP 1E1841-045 and SGR 1627-41 with Chandra. We obtained new infrared observations of SGR 1627-41 and reanalyzed archival observations of AXP 1E…
The Late Reionization of Filaments
K. Finlator, F. Ozel, R. Dave +1
We study the topology of reionization using accurate three-dimensional radiative transfer calculations post-processed on outputs from cosmological hydrodynamic simulations. In our…
Enduring Quests-Daring Visions (NASA Astrophysics in the Next Three Decades)
C. Kouveliotou, E. Agol, N. Batalha +16
The past three decades have seen prodigious advances in astronomy and astrophysics. Beginning with the exploration of our solar system and continuing through the pioneering Explore…
The Galactic Bulge Survey: outline and X-ray observations
P. G. Jonker, C. G. Bassa, G. Nelemans +22
We introduce the Galactic Bulge Survey (GBS) and we provide the Chandra source list for the region that has been observed to date. Among the goals of the GBS are constraining the n…
The Behavior of Matter under Extreme Conditions
F. Paerels, M. Mendez, M. Agueros +29
The cores of neutron stars harbor the highest matter densities known to occur in nature, up to several times the densities in atomic nuclei. Similarly, magnetic field strengths can…
NICER and Fermi GBM Observations of the First Galactic Ultraluminous X-ray Pulsar Swift J0243.6+6124
C. A. Wilson-Hodge, C. Malacaria, P. A. Jenke +19
Swift J0243.6+6124 is a newly discovered Galactic Be/X-ray binary, revealed in late September 2017 in a giant outburst with a peak luminosity of 2E+39 (d/7 kpc)^2 erg/s (0.1-10 keV…
Radio light curves during the passage of cloud G2 near Sgr A*
A. Sadowski, L. Sironi, D. Abarca +3
We calculate radio light curves produced by the bow shock that is likely to form in front of the G2 cloud when it penetrates the accretion disk of Sgr A*. The shock acceleration of…
A New Moment Method for Continuum Radiative Transfer in Cosmological Reionization
K. Finlator, F. Ozel, R. Dave
We introduce a new code for computing time-dependent continuum radiative transfer and non-equilibrium ionization states in static density fields with periodic boundaries. Our code…
Identification of twenty-three accreting binaries in the Galactic Bulge Survey
M. A. P. Torres, P. G. Jonker, C. T. Britt +8
(Abridged:) We present the identification of optical counterparts to 23 Galactic Bulge Survey X-ray sources. We report their accurate coordinates and optical spectra acquired at th…
The Large Observatory For x-ray Timing
M. Feroci, J. W. den Herder, E. Bozzo +341
The Large Observatory For x-ray Timing (LOFT) was studied within ESA M3 Cosmic Vision framework and participated in the final down-selection for a launch slot in 2022-2024. Thanks…
EXO 0748-676 Rules out Soft Equations of State for Neutron Star Matter
F. Ozel
The interiors of neutron stars contain matter at very high densities, in a state that differs greatly from those found in the early universe or achieved at terrestrial experiments.…