Tommy Wiklind

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We have detected the four 18 cm OH lines from the z approximaetely 0.765 gravitational lens toward PMN J0134-0931. The 1612 and 1720 MHz lines are in conjugate absorption and emission, providing a laboratory to test the evolution of fundamental constants over a large lookback time. We compare the HI and OH main line absorption redshifts of the different(More)
Aims. Molecules that trace the high-density regions of the interstellar medium have been observed in (ultra-)luminous (far-)infrared galaxies, in order to initiate multiple-molecule multiple-transition studies to evaluate the physical and chemical environment of the nuclear medium and its response to the ongoing nuclear activity.(3−2) transitions were(More)
We report the detection of the CO 4–3, 6–5, 9–8, 10–9, and 11–10 lines in the Broad Absorption Line quasar APM 08279+5255 at z = 3.9 using the IRAM 30 m telescope. We also present IRAM PdBI high spatial resolution observations of the CO 4–3 and 9–8 lines, and of the 1.4 mm dust radiation as well as an improved spectrum of the HCN(5–4) line. Unlike CO in(More)
We detect HCN J=5-4 emission from the ultraluminous quasar APM08279+5255 at z=3.911 using the IRAM Plateau de Bure interfer-ometer. This object is strongly gravitationally lensed, yet still thought to be one of the most intrinsically luminous objects in the Universe. The new data imply a line luminosity L ′ HCN (J=5−4) = 4.0 ± 0.5 × 10 10 K km s −1 pc 2.(More)
A detailed study of the absorbing molecular clouds towards the radio source PKS1413+135, at a red-shift z=0.247, is reported. Physical conditions (density, temperature, filling factors) are derived for the molecular gas, in the frame work of two models: a homogeneous multicomponent model with equal filling factors, and a two–phase medium consisting of dense(More)
We present interferometric observations of CO(1–0) emission in the elliptical galaxy NGC759 with an angular resolution of 3 . ′′1×2 . 3 (990×735pc at a distance of 66Mpc). NGC759 contains 2.4 × 10M⊙ of molecular gas. Most of the gas is confined to a small circumnuclear ring with a radius of 650pc with an inclination of 40. The maximum gas surface density in(More)
The formation of bars in disk galaxies is a tracer of the dynamical maturity of the population. Previous studies have found that the incidence of bars in disks decreases from the local Universe to z ∼ 1, and by z > 1 simulations predict that bar features in dynamically mature disks should be extremely rare. Here we report the discovery of strong barred(More)
We report results from a search for massive and evolved galaxies at z 5 in the Great Observatories Origins Deep Survey (GOODS) southern field. Combining HST ACS, VLT ISAAC and Spitzer IRAC broad–band photometric data, we develop a color selection technique to identify candidates for being evolved galaxies at high redshifts. The color selection is primarily(More)
New single dish and millimeter wave interferometer observations of the molecular absorption line system in the gravitational lens to PKS1830–211 at z=0.88582 is presented. Self–calibrated interferometer data shows unequivocally that the previously detected absorption component is associated with the gravitationally lensed south–west image of the background(More)