9.7 μm Silicate Features in Active Galactic Nuclei: New Insights into Unification Models
- Y. Shi, G. Rieke, J. Bouwman
- Physics
- 30 August 2006
We describe observations of 9.7 μm silicate features in 97 AGNs, exhibiting a wide range of AGN types and of X-ray extinction toward the central nuclei. We find that the strength of the silicate…
Spitzer Observations of 3C Quasars and Radio Galaxies: Mid-Infrared Properties of Powerful Radio Sources
- K. Cleary, C. Lawrence, J. Marshall, L. Hao, D. Meier
- Physics
- 1 June 2006
We have measured mid-infrared radiation from an orientation-unbiased sample of 3CRR galaxies and quasars at redshifts 0.4 ≤ z ≤ 1.2 with the IRS and MIPS instruments on Spitzer. Powerful emission…
A Relation between the Mid-Infrared [Ne V] 14.3 μm and [Ne III] 15.6 μm Lines in Active Galactic Nuclei
- V. Gorjian, K. Cleary, M. Werner, C. Lawrence
- Physics
- 18 January 2007
We present a strong correlation between the [Ne V] 14.3 μm and [Ne III] 15.6 μm emission lines arising from the narrow-line regions (NLRs) of active galactic nuclei (AGNs), spanning 4 orders of…
THE ORIGIN OF THE SILICATE EMISSION FEATURES IN THE SEYFERT 2 GALAXY NGC 2110
- R. Mason, N. Levenson, M. Werner
- Physics
- 6 February 2009
The unified model of active galactic nuclei (AGNs) predicts silicate emission features at 10 and 18 μm in type 1 AGNs, and such features have now been observed in objects ranging from distant…
Source subtraction for the extended Very Small Array and 33-GHz source count estimates
We describe the source subtraction strategy and observations for the extended Very Small Array (VSA), a cosmic microwave background interferometer operating at 33 GHz. A total of 453 sources were…
Radio source calibration for the Very Small Array and other cosmic microwave background instruments at around 30 GHz
Accurate calibration of data is essential for the current generation of cosmic microwave background (CMB) experiments. Using data from the Very Small Array (VSA), we describe procedures which will…
Line-Intensity Mapping: 2017 Status Report
Following the first two annual intensity mapping workshops at Stanford in March 2016 and Johns Hopkins in June 2017, we report on the recent advances in theory, instrumentation and observation that…
FIRST SEASON QUIET OBSERVATIONS: MEASUREMENTS OF COSMIC MICROWAVE BACKGROUND POLARIZATION POWER SPECTRA AT 43 GHz IN THE MULTIPOLE RANGE 25 ⩽ ⩽ 475
- Q. C. C. Bischoff, A. Brizius, B. Winstein
- Physics
- 14 December 2010
The Q/U Imaging ExperimenT (QUIET) employs coherent receivers at 43 GHz and 94 GHz, operating on the Chajnantor plateau in the Atacama Desert in Chile, to measure the anisotropy in the polarization…
Joint Power Spectrum and Voxel Intensity Distribution Forecast on the CO Luminosity Function with COMAP
- H. T. Ihle, D. Chung, I. Wehus
- PhysicsAstrophysical Journal
- 22 August 2018
We develop a framework for joint constraints on the CO luminosity function based on power spectra (PS) and voxel intensity distributions (VID) and apply this to simulations of CO Mapping Array…
W-Band cryogenic InP MMIC LNAs with noise below 30K
- L. Samoska, M. Varonen, S. Sarkozy
- PhysicsIEEE MTT-S International Microwave Symposium…
- 17 June 2012
In this paper, we describe two monolithic millimeter-wave integrated circuit (MMIC) low noise amplifiers (LNAs) for W-Band which have a noise temperature of 30K or better over a wide bandwidth when…
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