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Titolo:
A submillimetre survey of the star formation history of radio galaxies
Autore:
Archibald, EN; Dunlop, JS; Hughes, DH; Rawlings, S; Eales, SA; Ivison, RJ;
Indirizzi:
Joint Astron Ctr, Hilo, HI 96720 USA Joint Astron Ctr Hilo HI USA 96720Joint Astron Ctr, Hilo, HI 96720 USA Univ Edinburgh, Inst Astron, Edinburgh EH9 3HJ, Midlothian, Scotland Univ Edinburgh Edinburgh Midlothian Scotland EH9 3HJ Midlothian, Scotland INAOE, Puebla 72000, Mexico INAOE Puebla Mexico 72000INAOE, Puebla 72000, Mexico Univ Oxford, Dept Phys, Oxford OX1 3RH, England Univ Oxford Oxford England OX1 3RH d, Dept Phys, Oxford OX1 3RH, England Univ Wales, Dept Phys & Astron, Cardiff CF2 3YB, S Glam, Wales Univ WalesCardiff S Glam Wales CF2 3YB n, Cardiff CF2 3YB, S Glam, Wales Univ Coll London, Dept Phys & Astron, London WC1E 6BT, England Univ Coll London London England WC1E 6BT stron, London WC1E 6BT, England
Titolo Testata:
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
fascicolo: 2, volume: 323, anno: 2001,
pagine: 417 - 444
SICI:
0035-8711(20010511)323:2<417:ASSOTS>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
HIGH-RESOLUTION OBSERVATIONS; HIGH-REDSHIFT; 6C SURVEY; OPTICAL IDENTIFICATIONS; ZONE 30-DEGREES-LESS-THAN-DELTA-LESS-THAN-51-DEGREES; STATISTICAL-METHODS; ASTRONOMICAL DATA; DISTANT GALAXIES; VLA OBSERVATIONS; SOURCE COUNTS;
Keywords:
stars : formation; dust, extinction; galaxies : active; galaxies : elliptical and lenticular, cD; galaxies : formation; submillimetre;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
142
Recensione:
Indirizzi per estratti:
Indirizzo: Archibald, EN Joint Astron Ctr, 660 N Aohoku Pl,Univ Pk, Hilo, HI 96720 USA Joint Astron Ctr 660 N Aohoku Pl,Univ Pk Hilo HI USA 96720 A
Citazione:
E.N. Archibald et al., "A submillimetre survey of the star formation history of radio galaxies", M NOT R AST, 323(2), 2001, pp. 417-444

Abstract

We present the results of the first major systematic submillimetre survey of radio galaxies spanning the redshift range 1 < z < 5. The primary aim ofthis work is to elucidate the star formation history of this sub class of elliptical galaxies by tracing the cosmological evolution of dust mass. Using SCUBA on the JCMT, we have obtained 850-mum photometry of 47 radio galaxies to a consistent rms depth of 1 mJy, and have detected dust emission in 14 cases. The radio galaxy targets have been selected from a series of low-frequency radio surveys of increasing depth (3CRR, 6CE, etc.), in order to allow us to separate the effects of increasing redshift and increasing radio power on submillimetre luminosity, Although the dynamic range of our study is inevitably small, we find clear evidence that the typical submillimetre luminosity (and hence dust mass) of a powerful radio galaxy is a stronglyincreasing function of redshift; the detection rate rises from similar or equal to 15 per cent at z < 2.5 to <greater than or equal to> 75 per cent at z > 2.5, and the average submillimetre luminosity rises at a rate cc (1 z)(3) out to z similar or equal to 4. Moreover, our extensive sample allows us to argue that this behaviour is not driven by underlying correlations with other radio galaxy properties such as radio power, radio spectral index, or radio source size/age. Although radio selection may introduce other more subtle biases, the redshift distribution of our detected objects is in fact consistent with the most recent estimates of the redshift distributionof comparably bright submillimetre sources discovered in blank field surveys. The evolution of submillimetre luminosity found here for radio galaxiesmay thus be representative of massive ellipticals in general.

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Documento generato il 25/06/18 alle ore 17:30:24