A dataset provided by the European Space Agency

Name OT1_fcarrera_1
Title Measuring the physical properties of submillimeter galaxies around high redshift QSOs
URL

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DOI 10.5270/esa-8owedo8
Author carrera, f. j.
Description We have detected strong overdensities of submillimeter galaxies (SMGs) around a sample of z~2 QSOs using SCUBA 450 and 850 micron maps. In at least one case we have proved that most of those objects are indeed at the same redshift as the QSO, and hence related to it. If the other SMGs are also related to their entral QSOs they would represent high density peaks in the density of the early Universe, where present-day massive galaxies are thought to form. However, our understanding of the origin of such emission (expected to be due to thermal emission by dust heated by star formation) is very sketchy, since we only have one or, at best, two measurements of their far infra-red-submm Spectral Energy Distribution. Small scan maps with PACS and SPIRE on-board Herschel would provide crucial data around the expected peak of the emission for those SMGs, allowing an unambiguous determination of its spectral shape and strength, and hence proving its origin and providing accurate estimates of the physical properties of the emitting dust. This in turn can be used to quantify the star formation rates and dust masses, to understand the evolutionary status of these objects. Additionally, the high-sensitivity Herschel maps would probe the source counts around the QSOs in hitherto unexplored bands to unprecedented depth, providing vital clues to really understand the role of these objects in the formation of galaxies in these early peaks in the density of the Universe.
Publication Submm-bright X-ray-absorbed QSOs at z ˜ 2: insights into the coevolution of AGN and star formation . Khan-Ali A. et al. . Monthly Notices of the Royal Astronomical Society, Volume 448, Issue 1, p.75-89 . 448 . 10.1093\/mnras\/stu2719 . 2015MNRAS.448...75K ,
Instrument PACS_PacsPhoto_largeScan, SPIRE_SpirePhoto_small
Temporal Coverage 2011-04-26T19:49:41Z/2012-06-03T15:49:45Z
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 µm range, bridging the gap between earlier infrared space missions and groundbased facilities.
Creator Contact https://support.cosmos.esa.int/herschel/
Date Published 2012-12-03T15:42:20Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2012-12-03T15:42:20Z, OT1_fcarrera_1, SPG v14.2.0. https://doi.org/10.5270/esa-8owedo8