Sign on

SAO/NASA ADS Astronomy Abstract Service


· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· arXiv e-print (arXiv:1312.1087)
· References in the article
· Citations to the Article (31) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (60)
· NED Objects (58)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
The dust content of QSO hosts at high redshift
Authors:
Calura, F.; Gilli, R.; Vignali, C.; Pozzi, F.; Pipino, A.; Matteucci, F.
Affiliation:
AA(INAF, Osservatorio Astronomico di Bologna, Via Ranzani 1, I-40127 Bologna, Italy; ), AB(INAF, Osservatorio Astronomico di Bologna, Via Ranzani 1, I-40127 Bologna, Italy), AC(INAF, Osservatorio Astronomico di Bologna, Via Ranzani 1, I-40127 Bologna, Italy; Dipartimento di Fisica e Astronomia, Universitá degli Studi di Bologna, Viale Berti Pichat 6/2, I-40127 Bologna, Italy), AD(Dipartimento di Fisica e Astronomia, Universitá degli Studi di Bologna, Viale Berti Pichat 6/2, I-40127 Bologna, Italy), AE(Institut fur Astronomie, ETH Zurich, Wolfgang-Pauli-Str. 27, CH-8093 Zurich, Switzerland), AF(Dipartimento di Fisica - Sezione di Astronomia, Università di Trieste, Via G. B. Tiepolo 11, I-34131 Trieste, Italy)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 438, Issue 4, p.2765-2783 (MNRAS Homepage)
Publication Date:
03/2014
Origin:
OUP
Astronomy Keywords:
dust, extinction, galaxies: elliptical and lenticular, cD, galaxies: evolution, quasars: general, cosmology: observations
Abstract Copyright:
2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society
DOI:
10.1093/mnras/stt2329
Bibliographic Code:
2014MNRAS.438.2765C

Abstract

Infrared observations of high-z quasar (QSO) hosts indicate the presence of large masses of dust in the early Universe. When combined with other observables, such as neutral gas masses and star formation rates, the dust content of z ˜ 6 QSO hosts may help constraining their star formation history. We have collected a data base of 58 sources from the literature discovered by various surveys and observed in the far-infrared. We have interpreted the available data by means of chemical evolution models for forming protospheroids, investigating the role of the major parameters regulating star formation and dust production. For a few systems, given the derived small dynamical masses, the observed dust content can be explained only by assuming a top-heavy initial mass function, an enhanced star formation efficiency and an increased rate of dust accretion. However, the possibility that, for some systems, the dynamical mass has been underestimated cannot be excluded. If this were the case, the dust mass can be accounted for by standard model assumptions. We provide predictions regarding the abundance of the descendants of QSO hosts; albeit rare, such systems should be present and detectable by future deep surveys such as Euclid already at z > 4.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)


Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints