The Surface Density of Extremely Red Objects
نویسندگان
چکیده
منابع مشابه
The Surface Density of Extremely Red Objects
We present initial results from a field survey for extremely red objects (EROs, defined here as (R-K ) ≥ 6) covering 154 square arcminutes of sky, from the first of 7 deep, wide-field K ′ images obtained as part of the Calar Alto Deep Imaging Survey (CADIS). The 5σ point source detection limits are K ′ = 20. 5 and R = 25. 0, while extended-source limits are up to 0. 50–0. 75 brighter. We identi...
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We report on a study of the surface density of Extremely Red Objects (EROs) in the fields of 13 radio-loud quasars at 1.8 < z < 3.0 covering a total area of 61.7 arcmin. There is a large variation in the ERO surface density from field to field, and as many as 30–40 % of the fields have roughly 4–5 times more EROs than what is expected from a random distribution. The average surface density exce...
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We briefly discuss our survey of Extremely Red Objects (EROs) with HST/NICMOS and deep ground-based images and summarize its results. We use the high-resolution NICMOS images to sub-divide EROs into morphological classes, tentatively arguing that about 60 % of EROs (18 out of 30) are early-type galaxies. About 20 % (6 out of 30 objects) appear to be flattened disk systems. Another 10 % (3 out o...
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We present the results from a sensitive multi-wavelength analysis of the properties of Extremely Red Objects (EROs). Our analysis employs deep RIzJHK photometry of a 8.5×8.5 region to select a sample of 68 EROs with (R − K) ≥ 5.3 and brighter than K = 20.5 (5σ). We combine this photometric dataset with an extremely deep 1.4GHz radio map of the field obtained from the VLA. This map reaches a 1-σ...
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We investigate extremely red objects (EROs) using nearand mid-infrared observations in five passbands (3.6 to 24 m) obtained from the Spitzer Space Telescope, and deep ground-based R and K imaging. The great sensitivity of the Infrared Array Camera (IRAC) camera allows us to detect 64 EROs (a surface density of 2:90 0:36 arcmin ; 1⁄23:6 AB < 23:7) in only 12 minutes of IRAC exposure time, by me...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 1999
ISSN: 0004-637X,1538-4357
DOI: 10.1086/307708