A dataset provided by the European Space Agency

Name AOTVAL_kmeisenh_2
Title The Dusty Young Universe: Photometry and Spectroscopy of Quasars at z>2


DOI 10.5270/esa-6lzqwpk
Author meisenheimer, k.
Description The detection of a significant fraction of the highest redshift quasars (z > 5) in the (sub-)mm wavelength range indicates that a substantial amount of dust has been synthesized already during the first billion year since the Big Bang. Recent 24 micron observations with Spitzer have shown that very hot dust is present close to the QSO core in most z >5 quasars. However, both the (sub-)mm and MIR observations can only catch tails of the dust emission spectrum, at lambda_rest > 200 m, and at lambda_rest < 5 m, respectively. Measuring the peak of the dust emission, expected to reach 10 .. 30 mJy around lambda_rest ~ 50 m (120m < lambda_obs < 700m), has been beyond the capabilities of FIR satellites or ground-based sub-mm telescopes. Thus, critical properties, such as FIR luminosity, dust temperatures and mass, remain unconstrained. To improve on this situation, we propose a Herschel Guaranteed Time Key Programme (GT KP) to collect far-infrared and sub-millimeter photometry of more than 100 high redshift quasars using the PACS and SPIRE instruments. We plan to determine the SEDs of three samples of QSOs: (i) all z > 5 quasars known to date, (ii) a dozen radio loud quasars and galaxies at the highest redshifts, and (iii) 29 Broad Absorption Line (BAL) quasars together with a comparison sample of 17 non-BAL QSOs at matching redshifts. In addition, we plan to obtain PACS spectroscopy of four very dust-rich and lensed high-redshift QSOs and galaxies for spectral line diagnostics, which will help to disentangle the contributions of AGN- and starburst-heated dust and thus complement the SED-based study. We will spend in total 165 hours of PACS GT in this key programme, 115 hours for the photometry with PACS and SPIRE, and 50 hours for the FIR spectroscopy.
Instrument PACS_PacsPhoto_point
Temporal Coverage 2009-09-11T15:52:46Z/2009-09-11T16:39:25Z
Version SPG v14.2.0
Mission Description Herschel was launched on 14 May 2009! It is the fourth 'cornerstone' mission in the ESA science programme. With a 3.5 m Cassegrain telescope it is the largest space telescope ever launched. It is performing photometry and spectroscopy in approximately the 55-671 ┬Ám range, bridging the gap between earlier infrared space missions and groundbased facilities.
Creator Contact https://support.cosmos.esa.int/herschel/
Date Published 2009-10-21T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2009-10-21T00:00:00Z, AOTVAL_kmeisenh_2, SPG v14.2.0. https://doi.org/10.5270/esa-6lzqwpk