Search Publications
Probing the Interstellar Medium of z ~ 1 Ultraluminous Infrared Galaxies through Interferometric Observations of CO and Spitzer Mid-infrared Spectroscopy
Kirkpatrick, Allison; Dickinson, Mark E.; Daddi, Emanuele +8 more
We explore the relationship between gas, dust, and star formation in a sample of 12 ultraluminous infrared galaxies (ULIRGs) at high-redshift compared to a similar sample of local galaxies. We present new CO observations and/or Spitzer mid-IR spectroscopy for six 70 µm selected galaxies at z ~ 1 in order to quantify the properties of the mol…
SDO/AIA and Hinode/EIS Observations of Interaction between an EUV Wave and Active Region Loops
Li, Ting; Zhang, Jun; Liu, Wei +2 more
We present detailed analysis of an extreme-ultraviolet (EUV) wave and its interaction with active region (AR) loops observed by the Solar Dynamics Observatory/Atmospheric Imaging Assembly and the Hinode EUV Imaging Spectrometer (EIS). This wave was initiated from AR 11261 on 2011 August 4 and propagated at velocities of 430-910 km s-1. …
High-cadence and High-resolution Hα Imaging Spectroscopy of a Circular Flare's Remote Ribbon with IBIS
Xu, Yan; Liu, Chang; Jing, Ju +6 more
We present an unprecedented high-resolution Hα imaging spectroscopic observation of a C4.1 flare taken with the Interferometric Bidimensional Spectrometer (IBIS) in conjunction with the adaptive optics system at the 76 cm Dunn Solar Telescope on 2011 October 22 in the active region NOAA 11324. Such a two-dimensional spectroscopic observation cover…
Proper Motions and Origins of AXP 1E 2259+586 and AXP 4U 0142+61
Tendulkar, Shriharsh P.; Kulkarni, Shrinivas R.; Cameron, P. Brian
Using high-resolution NIR images supported by laser guide star adaptive optics from the Keck II telescope from 2005 to 2012, we have measured the proper motions of two anomalous X-ray pulsars, AXP 1E 2259+586 and AXP 4U 0142+61. The proper motion of AXP 1E 2259+586 in the sky frame is (µα, µδ) = (- 6.4 ± 0.6, -2.3…
H-ATLAS: The Cosmic Abundance of Dust from the Far-infrared Background Power Spectrum
Clements, D. L.; Scott, D.; Ibar, E. +22 more
We present a measurement of the angular power spectrum of the cosmic far-infrared background (CFIRB) anisotropies in one of the extragalactic fields of the Herschel Astrophysical Terahertz Large Area Survey at 250, 350, and 500 µm bands. Consistent with recent measurements of the CFIRB power spectrum in Herschel-SPIRE maps, we confirm the ex…
The Inner Kiloparsec of Mrk 273 with Keck Adaptive Optics
Kewley, Lisa; Armus, Lee; U, Vivian +6 more
There is X-ray, optical, and mid-infrared imaging and spectroscopic evidence that the late-stage ultraluminous infrared galaxy merger Mrk 273 hosts a powerful active galactic nucleus (AGN). However, the exact location of the AGN and the nature of the nucleus have been difficult to determine due to dust obscuration and the limited wavelength covera…
The Abundance of H2O and HDO in Orion Kl from Herschel/HIFI
Bergin, Edwin A.; Melnick, Gary J.; Neill, Justin L. +4 more
Using a broadband, high spectral resolution survey toward the Orion Kleinmann-Low nebula acquired with Herschel/HIFI as part of the Herschel Observations of Extra-Ordinary Sources key program, we derive the abundances of H2O and HDO in the different spatial/velocity components associated with this massive star-forming region: the Hot Co…
The Accretion Disk and Ionized Absorber of the 9.7 hr Dipping Black Hole Binary MAXI J1305-704
Mihara, T.; Sugizaki, M.; Yamaoka, K. +14 more
We report the results from X-ray studies of the newly discovered black hole candidate MAXI J1305-704 based on Suzaku and Swift observations in the low/hard and high/soft states, respectively. The long Suzaku observation shows two types of clear absorption dips, both of which recur on a dip interval of 9.74 ± 0.04 hr, which we identify with the orb…
Weak Lensing Calibrated M-T Scaling Relation of Galaxy Groups in the COSMOS Fieldsstarf
Finoguenov, A.; Ilbert, O.; Tanaka, M. +9 more
The scaling between X-ray observables and mass for galaxy clusters and groups is instrumental for cluster-based cosmology and an important probe for the thermodynamics of the intracluster gas. We calibrate a scaling relation between the weak lensing mass and X-ray spectroscopic temperature for 10 galaxy groups in the COSMOS field, combined with 55…
Kinetic Modeling of Particle Acceleration in a Solar Null-point Reconnection Region
Haugbølle, T.; Nordlund, Å.; Baumann, G.
The primary focus of this paper is on the particle acceleration mechanism in solar coronal three-dimensional reconnection null-point regions. Starting from a potential field extrapolation of a Solar and Heliospheric Observatory (SOHO) magnetogram taken on 2002 November 16, we first performed magnetohydrodynamics (MHD) simulations with horizontal m…