Astrophys. J., 606, 664-682 (2004/May-2)
The faint counterparts of MAMBO millimeter sources near the New Technology Telescope Deep Field.
DANNERBAUER H., LEHNERT M.D., LUTZ D., TACCONI L., BERTOLDI F., CARILLI C., GENZEL R. and MENTEN K.M.
Abstract (from CDS):
We discuss identifications for 18 sources from our Max-Planck-Millimeter-Bolometer (MAMBO) 1.2 mm survey of the region surrounding the NTT Deep Field. We have obtained accurate positions from Very Large Array 1.4 GHz interferometry, and in a few cases IRAM millimeter interferometry, and have also made deep BVRIzJK imaging at ESO. We find thirteen 1.2 mm sources associated with optical/near-infrared objects in the magnitude range K=19.0-22.5, while five are blank fields at K>22. We argue from a comparison of optical/near-infrared photometric redshifts and radio/millimeter redshift estimates that two of the 13 optical/near-infrared objects are likely foreground objects distinct from the dust sources, one of them possibly lensing the millimeter source. The median redshift of the radio-identified millimeter sources is ∼2.6 from the radio/millimeter estimator, and the median optical/near-infrared photometric redshifts for the objects with counterparts is ∼2.1. This suggests that those radio-identified millimeter sources without optical/near-infrared counterparts tend to lie at higher redshifts than those with optical/near-infrared counterparts. Compared to published identifications of objects from 850 µm surveys of similar depth, the median K and I magnitudes of our counterparts are roughly 2 mag fainter, and the dispersion of I-K colors is less. Real differences in the median redshifts, residual misidentifications with bright objects, cosmic variance, and small-number statistics are likely to contribute to this significant difference, which also affects redshift measurement strategies. Some of the counterparts are red in J-K (≳20%), but the contribution of such millimeter objects to the recently studied population of near-infrared-selected (Js-Ks>2.3) high-redshift galaxies is only of order a few percent. The recovery rate of MAMBO sources by preselection of optically faint radio sources is relatively low (∼25%), in contrast to some claims of a higher rate for Submillimeter Common-User Bolometric Array (SCUBA) sources (∼70%). In addition to this difference, the MAMBO sources also appear significantly fainter (∼1.5 mag in the I band) than radio-preselected SCUBA sources. We discuss the basic properties of the near-infrared/(sub)millimeter/radio spectral energy distributions of our galaxies and of interferometrically identified submillimeter sources from the literature. From a comparison with submillimeter objects with CO-confirmed spectroscopic redshifts, we argue that roughly two-thirds of the (sub)millimeter galaxies are at z≳2.5. This fraction is probably larger when including sources without radio counterparts.
Galaxies: Formation - Galaxies: High-Redshift - Galaxies: Starburst - Infrared: Galaxies - Submillimeter
VizieR on-line data:
<Available at CDS (J/ApJ/606/664): table1.dat table2.dat>
Table 1, col(1): [DLL2002] MM JHHMMSS+DDMM.m N=15 added. Table 1, col(2): [EBI2003] NTT-MM NN N=12 added among (Nos 7-42). Table 1, col(6,7): DLL2004] JHHMMSS.ss+DDMMSS.s N=23. Table 2: [DLL2004] MAMBO NTT -MM NNaN N=82.
Status at CDS
All or part of tables of objects could be ingested in SIMBAD with priority 2.
Introd. : SMM 02399-0314 is a misprint for SMM J02399-0134, Parag. 4 : LE 850.12 = [SFD2002] LHE 12
View the reference in ADS
To bookmark this query, right click on this link: simbad:2004ApJ...606..664D and select 'bookmark this link' or equivalent in the popup menu