2009ApJ...699.1843W -
Astrophys. J., 699, 1843-1849 (2009/July-2)
Radio and X-ray properties of submillimeter galaxies in the A2125 field.
WAGG J., OWEN F., BERTOLDI F., SAWITZKI M., CARILLI C.L., MENTEN K.M. and VOSS H.
Abstract (from CDS):
We present the radio and X-ray properties of 1.2 mm MAMBO source candidates in a 1600 arcmin2 field centered on the Abell 2125 galaxy cluster at z = 0.247. The brightest, nonsynchrotron millimeter source candidate in the field has a photometric redshift z = 3.93+1.11–0.80 and is not detected in a 31 ks Chandra X-ray exposure. These findings are consistent with this object being an extremely dusty and luminous starburst galaxy at high redshift, possibly the most luminous yet identified in any blank-field millimeter survey. The deep 1.4 GHz Very Large Array imaging identifies counterparts for 83% of the 29 mm source candidates identified at ≥4σ (S_1.2 mm_= 2.7-52.1 mJy), implying that the majority of these objects are likely to lie at z ≲ 3.5. The median millimeter-to-radio wavelength photometric redshift of this radio-detected sample is z ∼ 2.2 (first and third quartiles of 1.7 and 3.0), consistent with the median redshift derived from optical spectroscopic surveys of the radio-detected subsample of bright submillimeter galaxies (S_850 µm_> 5 mJy). Three millimeter-selected quasars are confirmed to be X-ray luminous in the high-resolution Chandra imaging, while another millimeter source candidate with potential multiple radio counterparts is also detected in the X-ray regime. Both of these radio counterparts are positionally consistent with the millimeter source candidate. One counterpart is associated with an elliptical galaxy at z = 0.2425, but we believe that a second counterpart associated with a fainter optical source likely gives rise to the millimeter emission at z ∼ 1.
Abstract Copyright:
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Journal keyword(s):
galaxies: active - galaxies: starburst - submillimeter - X-rays: galaxies
Nomenclature:
Tables 1-2, Text: [WOB2009] JHHMMSS+DDMM.m N=21+5+3.
Simbad objects:
31
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