Search Publications
Testing models of quasar hosts with strong gravitational lensing by quasar hosts
Cen, Renyue; Safarzadeh, Mohammadtaher
We perform a statistical analysis of strong gravitational lensing by quasar hosts of background galaxies, in the two competing models of dark matter haloes of quasars, halo occupation distribution (HOD) and Cen and Safarzadeh (CS) models. Utilizing the BolshoiP simulation, we demonstrate that strong gravitational lensing provides a potentially ver…
Spatial Offsets in Flare-CME Current Sheets
Giordano, Silvio; Raymond, John C.; Ciaravella, Angela
Magnetic reconnection plays an integral part in nearly all models of solar flares and coronal mass ejections (CMEs). The reconnection heats and accelerates the plasma, produces energetic electrons and ions, and changes the magnetic topology to form magnetic flux ropes and to allow CMEs to escape. Structures that appear between flare loops and CME …
Cosmic X-ray surveys of active galactic nuclei: The synergy between X-ray and infrared observations
Alexander, D. M.
We briefly review the synergy between X-ray and infrared observations for Active Galactic Nuclei (AGNs) detected in cosmic X-ray surveys, primarily with XMM-Newton, Chandra, and NuSTAR. We focus on two complementary aspects of this X-ray-infrared synergy (1) the identification of the most heavily obscured AGNs and (2) the connection between star f…
SXP 7.92: a recently rediscovered Be/X-ray binary in the Small Magellanic Cloud, viewed edge on
D'Elia, V.; Udalski, A.; Esposito, P. +4 more
We present a detailed optical and X-ray study of the 2013 outburst of the Small Magellanic Cloud Be/X-ray binary SXP 7.92, as well as an overview of the last 18 years of observations from OGLE (Optical Gravitational Lensing Experiment), RXTE, Chandra and XMM-Newton. We revise the position of this source to RA(J2000) = 00:57:58.4, Dec(J2000) = -72:…
Suzaku and Chandra observations of CIZA J1700.8-3144, a cluster of galaxies in the Zone of Avoidance
Maeda, Yoshitomo; Mori, Hideyuki; Nakazawa, Kazuhiro +2 more
We present the Chandra and Suzaku observations of 1RXS J170047.8-314442, located towards the Galactic bulge, to reveal a wide-band (0.3-10 keV) X-ray morphology and spectrum of this source. With the Chandra observation, no point source was found at the position of 1RXS J170047.8-314442. Instead, we revealed the presence of diffuse X-ray emission, …
A likely detection of a local interplanetary dust cloud passing near the Earth in the AKARI mid-infrared all-sky map
Onaka, T.; Kaneda, H.; Ishihara, D. +8 more
Context. We are creating the AKARI mid-infrared all-sky diffuse maps. Through a foreground removal of the zodiacal emission, we serendipitously detected a bright residual component whose angular size is about 50° × 20° at a wavelength of 9 µm.
Aims: We investigate the origin and the physical properties of the residual component.
Me…
The legacy of Stripe 82X in the next decade of XMM ‑Newton
LaMassa, S. M.
An improved solution to geometric distortion using an orthogonal method
Wang, Na; Peng, Huan-Wen; Peng, Qing-Yu
The geometric distortion of a CCD field of view has a direct influence on the positional measurements of CCD observations. In order to obtain high precision astrometric results, the geometric distortion should be derived and corrected precisely. As presented in our previous work, a convenient solution has been carried out and has also been applied…
Akari, SCUBA2 and Herschel Data of Pre-Stellar Cores
Di Francesco, J.; Ward-Thompson, D.; Pattle, K. +2 more
First Characterization of the Neutral ISM in Two Local Volume Dwarf Galaxies
Cannon, John M.; Mizener, Andrew; Bralts-Kelly, Lilly +9 more
We present the first H I spectral-line images of the nearby, star-forming dwarf galaxies UGC 11411 and UGC 8245, acquired as part of the “Observing for University Classes” program with the Karl G. Jansky Very Large Array (VLA). These low-resolution images localize the H I gas and reveal the bulk kinematics of each system. Comparing with Hubble Spa…