2003A&A...406L..55B

Query : 2003A&A...406L..55B

2003A&A...406L..55B - Astronomy and Astrophysics, volume 406L55-58 (2003/8-2)

Dust emission from the most distant quasars.

BERTOLDI F., CARILLI C.L., COX P., FAN X., STRAUSS M.A., BEELEN A., OMONT A. and ZYLKA R.

Abstract (from CDS):

We report observations of three SDSS z>6 QSOs at 250-GHz (1.2mm) using the 117-channel Max-Planck Millimeter Bolometer (MAMBO-2) array at the IRAM 30-meter telescope. J1148+5251 (z=6.42) and J1048+4637 (z=6.23) were detected with 250-GHz flux densities of 5.0±0.6mJy and 3.0±0.4mJy, respectively. J1630+4012 (z=6.05) was not detected with a 3σ upper limit of 1.8mJy. Upper flux density limits from VLA observations at 43-GHz for J1148+5251 and J1048+4637 imply steeply rising spectra, indicative of thermal infrared emission from warm dust. The far-infrared luminosities are estimated to be ≃1013L☉, and the dust masses ≃108M☉, assuming Galactic dust properties. The presence of large amounts of dust in the highest redshift QSOs indicates that dust formation must be rapid during the early evolution of QSO host galaxies. Dust absorption may hinder the escape of ionizing photons which reionize the intergalactic medium at this early epoch.

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Journal keyword(s): galaxies: formation - galaxies: starburst - galaxies: high-redshift - quasars: general - cosmology: observations - submillimeter

Nomenclature: Table 1: [BCC2003] J1148+5251 mm-WW (Nos SW, NE, E).

CDS comments: Table 1: FIRST-SW and FIRST-NE = FIRST J114812.1+525107 and FIRST J114819.5+525212 respectively in SIMBAD.

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 SDSS J104845.05+463718.3 QSO 10 48 45.058 +46 37 18.38   25.87 24.76     ~ 133 0
2 2MASX J11481213+5251079 LIN 11 48 12.1806978600 +52 51 07.515542952           ~ 18 0
3 SDSS J114816.64+525150.3 QSO 11 48 16.647 +52 51 50.31   25.73 25.04     ~ 487 0
4 NVSS J114819+525212 mm 11 48 19.578 +52 52 12.42           ~ 4 1
5 [BCC2003] J1148+5251 mm-E mm 11 48 28.8 +52 51 44           ~ 1 0
6 SDSS J163033.89+401209.6 QSO 16 30 33.898 +40 12 09.68   26.45 25.01     ~ 89 0

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