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          Institute: MPI für extraterrestrische Physik     Collection: Infrared and Submillimeter Astronomy     Display Documents

ID: 12573.0, MPI für extraterrestrische Physik / Infrared and Submillimeter Astronomy
Hubble Space Telescope Wide Field Planetary Camera 2 observations of hyperluminous infrared galaxies
Authors:Farrah, D.; Verma, A.; Oliver, S.; Rowan-Robinson, M.; McMahon, R.
Date of Publication (YYYY-MM-DD):2002-01-29
Title of Journal:Monthly Notices of the Royal Astronomical Society
Journal Abbrev.:Mon. Not. R. Astron. Soc.
Issue / Number:3
Start Page:605
End Page:619
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We present Hubble Space Telescope Wide Field Planetary Camera 2 I-band imaging for a sample of nine hyperluminous infrared galaxies (HLIRGs) spanning a redshift range 0.45 < z < 1.34. Three of the sample have morphologies showing evidence for interactions and six are quasi-stellar objects (QSOs). Host galaxies in the QSOs are detected reliably out to z similar to 0.8. The detected QSO host galaxies have an elliptical morphology with scalelengths spanning 6.5 < r(e)(kpc) < 88 and absolute k-corrected magnitudes spanning -24.5 < M-I < -25.2. There is no clear correlation between the infrared (IR) power source and the optical morphology. None of the sources in the sample, including F15307+3252, shows any evidence for gravitational lensing. We infer that the IR luminosities are thus real. Based on these results, and previous studies of HLIRGs, we conclude that this class of object is broadly consistent with being a simple extrapolation of the ULIRG population to higher luminosities; ULIRGs being mainly violently interacting systems powered by starbursts and/or active galactic nuclei. Only a small number of sources, the infrared luminosities of which exceed 10(13) L-circle dot are intrinsically less luminous objects that have been boosted by gravitational lensing.
Free Keywords:gravitational lensing; galaxies : active; quasars : general; galaxies : Seyfert; galaxies : starburst; infrared : galaxies
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für extraterrestrische Physik
External Affiliations:Univ London Imperial Coll Sci Technol & Med, Blackett Lab,; Prince Consort Rd, London SW7 2BW, England; Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BW, England; Max Planck Inst Extraterr Phys, D-85741 Garching, Germany; Univ Sussex, Ctr Astron, Brighton BN1 9QJ, E Sussex, England; Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England
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