2010A&A...518L..34L


Query : 2010A&A...518L..34L

2010A&A...518L..34L - Astronomy and Astrophysics, volume 518, L34-34 (2010/7-2)

Herschel-PACS far-infrared photometry of two z > 4 quasars.

LEIPSKI C., MEISENHEIMER K., KLAAS U., WALTER F., NIELBOCK M., KRAUSE O., DANNERBAUER H., BERTOLDI F., BESEL M.-A., DE ROSA G., FAN X., HAAS M., HUTSEMEKERS D., JEAN C., LEMKE D., RIX H.-W. and STICKEL M.

Abstract (from CDS):

We present Herschel far-infrared (FIR) observations of two sub-mm bright quasars at high redshift: SDSS J1148+5251 (z=6.42) and BR 1202-0725 (z=4.69) obtained with the PACS instrument. Both objects are detected in the PACS photometric bands. The Herschel measurements provide additional data points that constrain the FIR spectral energy distributions (SEDs) of both sources, and they emphasise a broad range of dust temperatures in these objects. For λrest≲20µm, the two SEDs are very similar to the average SEDs of quasars at low redshift. In the FIR, however, both quasars show excess emission compared to low-z QSO templates, most likely from cold dust powered by vigorous star formation in the QSO host galaxies. For SDSS J1148+5251 we detect another object at 160µm with a distance of ∼10" from the QSO. Although no physical connection between the quasar and this object can be shown with the available data, it could potentially confuse low-resolution measurements, thus resulting in an overestimate of the FIR luminosity of the z=6.42 quasar.

Abstract Copyright:

Journal keyword(s): galaxies: active - infrared: galaxies - quasars: individual: SDSS J1148+5251 - quasars: individual: BR 1202-0725

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 SDSS J114816.64+525150.3 QSO 11 48 16.647 +52 51 50.31   25.73 25.04     ~ 433 0
2 QSO B1202-074 QSO 12 05 23.1360370080 -07 42 32.759842896     17.5     ~ 367 5

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2023.01.30-21:43:37

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