Hintze Centre for Astrophysical Surveys

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The K-band Hubble diagram of submillimetre galaxies and hyperluminous galaxies

Monthly Notices of the Royal Astronomical Society 346:4 (2003) L51-L56

Authors:

S Serjeant, D Farrah, J Geach, T Takagi, A Verma, A Kaviani, M Fox

Abstract:

We present the K-baad Hubble diagrams (K-z relations) of submillimetre-selected galaxies and hyperluminous galaxies (HLIRGs). We report the discovery of a remarkably tight K-z relation of HLIRGs, indistinguishable from that of the most luminous radio galaxies. Like radio galaxies, the HLIRG K-z relation at z ∼ 3 is consistent with a passively evolving ∼3L* instantaneous starburst starting from a redshift of z ∼ 10. In contrast, many submillimetre-selected galaxies are ≳2 mag fainter, and the population has a much larger dispersion. We argue that dust obscuration and/or a larger mass range may be responsible for this scatter. The galaxies so far proved to be hyperluminous may have been biased towards higher AGN bolometric contributions than submillimetre-selected galaxies due to the 60-μm selection of some, so the location on the K-z relation may be related to the presence of the most massive active galactic nucleus. Alternatively, a particular host galaxy mass range may be responsible for both extreme star formation and the most massive active nuclei.
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The environments of hyperluminous infrared galaxies at 0.44

(2003)

Authors:

D Farrah, J Geach, M Fox, S Serjeant, S Oliver, A Verma, A Kaviani, M Rowan-Robinson
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A Search for Short Time-Scale Optical Variability in the GRB 030329 Afterglow

(2003)

Authors:

N Mirabal, JP Halpern, M Bureau, K Fathi
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SAURON: Observations of E/S0/SA galaxies

Revista Mexicana de Astronomia y Astrofisica: Serie de Conferencias 17 (2003) 199

Authors:

H Kuntschner, R Bacon, M Bureau, M Cappellari, Y Copin, RL Davies, E Emsellem, BW Miller, R McDermid, RF Peletier, EK Verolme, PT De Zeeuw

Abstract:

We present results from a new and unique integral-field spectrograph, SAURON. It has a large field of view and high throughput and is primarily built for the study of stellar & gaseous kinematics and stellar populations in galaxies. Its aim is to carry out a systematic survey of the velocity fields, velocity dispersions, and line-strength distributions of nearby ellipticals, lenticular galaxies and spiral bulges.
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Stellar astrophysics in the local group and beyond with the GTC

Revista Mexicana de Astronomia y Astrofisica: Serie de Conferencias 16 (2003) 145-149

Abstract:

In this review I discuss the capabilities that the GTC, and in particular the OSIRIS spectrometer, will bring to studying massive stellar populations within Local Group galaxies and even beyond. By observing massive stars in other dwarf irregular and spiral galaxies one can probe star formation and stellar evolution in extreme environments, the wind properties of massive luminous stars, and determine distances to an accuracy of ∼10%.