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Deep sub-mm surveys: High-z ULIRGs and the formation of spheroids

Lilly, S., Eales, Stephen Anthony, Gear, Walter Kieran, Webb, T. M., Bond, J. R., Dunne, L., Ferguson, H. C. and Wyse, R. F. G. 2000. Deep sub-mm surveys: High-z ULIRGs and the formation of spheroids. In: Carollo, C. Marcella, Ferguson, Henry C. and Wyse, Rosemary F. G. eds. The Formation of Galactic Bulges, Cambridge Contemporary Astrophysics, Cambridge, UK: Cambridge University Press, pp. 26-37. (10.1017/CBO9780511564611.005)

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Deep surveys of the sky at millimeter wavelengths have revealed a population of ultra-luminous infrared galaxies (ULIRGs) at high redshifts. These appear similar to local objects of similar luminosities (such as Arp220) but are much more ‘important’ at high redshift than at low resdhift, in the sense that they represent a much larger fraction of the total luminous output of the distant Universe than they do locally. In fact the ULIRGs at high redshift are producing a significant fraction (≥ 15%) of the total luminous output of the Universe averaged over all wavelengths and all epochs. The high-z ULIRGs could plausibly be responsible for producing the metal-rich spheroidal components of galaxies, including the bulges of spiral galaxies. In this case we would infer from the redshift distribution of the sources that much of this activity is probably happening relatively recently at z ≤ 2.

Item Type: Book Section
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Publisher: Cambridge University Press
ISBN: 9780521663342
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Last Modified: 04 Jun 2017 04:19

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