Professor Andrew Bunker: Publications

A population of faint extended line emitters and the host galaxies of optically thick QSO absorption systems

ASTROPHYSICAL JOURNAL 681:2 (2008) 856-880

Authors:

Michael Rauch, Martin Haehnelt, Andrew Bunker, George Becker, Francine Marleau, James Graham, Stefano Cristiani, Matt Jarvis, Cedric Lacey, Simon Morris, Celine Peroux, Huub Roettgering, Tom Theuns

Four Faint T Dwarfs from the UKIRT Infrared Deep Sky Survey (UKIDSS) Southern Stripe

(2007)

Authors:

Kuenley Chiu, Michael C Liu, Linhua Jiang, Katelyn N Allers, Daniel P Stark, Andrew Bunker, Xiaohui Fan, Karl Glazebrook, Trent J Dupuy

3D kinematics of high-z galaxies as seen through the gravitational telescope

ESO Astrophysics Symposia 2007 (2007) 387-391

Authors:

M Lemoine-Busserolle, SF Sánchez, M Kissler-Patig, R Pelló, JP Kneib, A Bunker, T Contini

Abstract:

The study of the physical properties of high-redshift galaxies has become one of the major goals of extragalactic astronomy. In particular the massassembly histories of galaxies have been the focus of many studies at redshifts 1 to 3. In the purpose of probing the dynamics of intermediate and high-redshift galaxies, we have designed a research program to carry out a near-infrared spectroscopic follow up of spatially resolved distant galaxies. Here, we present the results for A370-A5 (z=1.341), an arc behind the lens cluster Abell 370 (z=0.374), observed in the case of science verification programme of SINFONI/VLT. The natural magni fication due to massive galaxy clusters allows to spatially resolve and constrain the dynamics of young star forming galaxies 1 to 3 magnitudes fainter than those selected in blank fields. Thus, the study of lensed galaxies allows to probe a low mass regime of galaxies not accessible in standard observation. In this particular case, we found that the gas distribution and kinematics are consistent with a bipolar outflow with a range of velocities of v ∼ 100km/s. © 2007 Springer-Verlag Berlin Heidelberg.

A Population of Faint Extended Line Emitters and the Host Galaxies of Optically Thick QSO Absorption Systems

(2007)

Authors:

Michael Rauch, Martin Haehnelt, Andrew Bunker, George Becker, Francine Marleau, James Graham, Stefano Cristiani, Matt J Jarvis, Cedric Lacey, Simon Morris, Celine Peroux, Huub Roettgering, Tom Theuns

Halo ejection in distant radio galaxies: Jet feedback in massive galaxy formation

Astrophysics and Space Science 311:1-3 (2007) 305-309

Authors:

MA Dopita, M Reuland, W Van Breugel, W De Vries, SA Stanford, H Röttgering, G Miley, B Venemans, H Spinrad, S Dawson, A Dey, M Lacy, D Stern, A Bunker

Abstract:

We present results from a Keck optical and near IR spectroscopic study of the giant emission line halos of the z>3 High Redshift Radio Galaxies (HiZRGs) 4C 41.17, 4C 60.07 and B2 0902+34. The outer regions of these halos show quiet kinematics with typical velocity dispersions of a few hundred km∈s^-1 and velocity shears consistent with rotation. The inner regions contain shocked, clumpy cocoons of gas closely associated with the radio lobes with disturbed kinematics and expansion velocities and/or velocity dispersions >1000 km∈s^-1. We also find evidence for the ejection of chemically enriched material in 4C 41.17 up to a distance of 60 kpc along the radio-axis. We infer that these HiZRGs are undergoing a final jet-induced phase of star formation with the ejection of most of their interstellar medium before evolving to become "red and dead" Elliptical galaxies. © 2007 Springer Science+Business Media B.V.

51��