منابع مشابه
Quasars in the MAMBO blank field survey
Our MAMBO 1.2 mm blank field imaging survey of ∼ 0.75 sqd has uncovered four unusually bright sources, with flux densities between 10 and 90 mJy, all located in the Abell 2125 field. The three brightest are flat spectrum radio sources with bright optical and X-ray counterparts. Their mm and radio flux densities are variable on timescales of months. Their X-ray luminosities classify them as quas...
متن کاملA 1.2 mm MAMBO/IRAM-30m Survey of Dust Emission from the Highest Redshift PSS Quasars
We report 250 GHz (1.2 mm) observations of redshift ≥ 3.8 quasars from the Palomar Sky Survey (PSS) sample, using the Max-Planck Millimetre Bolometer (MAMBO) array at the IRAM 30-metre telescope. Eighteen sources were detected and upper limits were obtained for 44 with 3 σ flux density limits in the range 1.5–4 mJy. Adopting typical dust temperatures of 40–50 K, we derive dust masses of 10− 10M...
متن کاملCosbo: the Mambo 1.2 Millimeter Imaging Survey of the Cosmos Field
The inner 20 ; 20 arcmin of the COSMOS field was imaged at 250 GHz (1.2 mm) to an rms noise level of 1mJy per 1100 beam using the Max-Planck Millimeter Bolometer Array (MAMBO-2) at the IRAM 30 m telescope. We detect 15 sources at significance between 4 and 7 , 11 of which are also detected at 1.4 GHzwith the VLAwith a flux density >24 Jy (3 ). We identify 12 more lower significance mm sources b...
متن کاملQuasars in the Cosmos Field
We obtained medium-resolution spectra of 336 quasar candidates in the COSMOS HST/Treasury field using the MMT 6.5-meter telescope and the Hectospec multi-object spectrograph. Candidates were drawn from the Sloan Digital Sky Survey (SDSS) DR1 catalog using quasar flags set by the SDSS multi-color quasar target selection algorithm. In this paper we present our discovery spectra from 1.39 square d...
متن کاملDouble-Lobed Quasars In The FIRST Survey
In previous attempts to measure cosmological parameters from the angular size-redshift (θ-z) relation of double-lobed radio sources, the observed data have generally been consistent with a static Euclidean universe, rather than with standard Friedmann models, and past authors have disagreed significantly as to what effects are responsible for this observation. These results and different interp...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2006
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20053712