Search Publications
Astrophysical lasers operating in optical Fe II lines in stellar ejecta of η Carinae
Johansson, S.; Letokhov, V. S.
After the discovery of space masers based on OH radicals (Weaver et al. \cite{Wea65}) and H2O (Cheung et al. \cite{Che69}) such microwave lasers have been found to work in more than 100 molecular species (Elitzur \cite{Eli92}; Townes \cite{Tow97}), as well as in highly excited H atoms (Strelnitski et al. \cite{Str96}). In the IR region …
The European Large Area ISO Survey - IX. The 90-µm luminosity function from the Final Analysis sample
Serjeant, Stephen; La Franca, Fabio; Oliver, Seb +18 more
We present the 90-µm luminosity function of the Final Analysis of the European Large Area ISO Survey (ELAIS), extending the sample size of our previous analysis (Paper IV) by about a factor of 4. Our sample extends to z= 1.1, ~50 times the comoving volume of Paper IV, and 107.7 < h-2L/Lsolar < 1012…
The XMM-Newton view of NGC 6251
Brandt, W. N.; Mushotzky, R.; Gliozzi, M. +2 more
We report on the nuclear X-ray properties of the radio galaxy
A search for clusters and groups of galaxies on the line of sight towards 8 lensed quasars
Faure, C.; Alloin, D.; Kneib, J. P. +1 more
In this paper we present new ESO/VLT FORS1 and ISAAC images of the fields around eight gravitationally lensed quasars: CTQ 414, HE 0230-2130, LBQS 1009-0252, B 1030+074, HE 1104-1805, B 1359+154, H 1413+117 and HE 2149-2745. When available and deep enough, HST/WFPC2 data were also used to infer the photometric redshifts of the galaxies around the …
The Canada-UK Deep Submillimetre Survey - VIII. Source identifications in the 3-hour field
Gear, Walter; Le Fèvre, Olivier; Dunne, Loretta +10 more
We present optical, near-infrared (IR) and radio observations of the 3-hour field of the Canada-UK Deep Submillimetre Survey (CUDSS). Of the 27 submillimetre sources in the field, nine have secure identifications with either a radio source or a near-IR source. We show that the percentage of sources with secure identifications in the CUDSS is consi…
XMM-Newton observations of the starburst merger galaxies NGC 3256 and NGC 3310
Zezas, A.; Roberts, T. P.; Ward, M. J. +1 more
We present XMM-Newton EPIC observations of the two nearby starburst merger galaxies NGC 3256 and NGC 3310. The broad-band (0.3-10 keV) integrated X-ray emission from both galaxies shows evidence of multiphase thermal plasmas plus an underlying hard non-thermal power-law continuum. NGC 3256 is well fitted with a model comprising two MEKAL component…
Extended Tidal Structure in Two Lyα-emitting Starburst Galaxies
Cannon, John M.; Skillman, Evan D.; Östlin, Göran +4 more
We present new Very Large Array (VLA) C-configuration H I imaging of the Lyα-emitting starburst galaxies Tol 1924-416 and IRAS 08339+6517. The effective resolution probes neutral gas structures larger than 4.7 kpc in Tol 1924-416 and larger than 8.1 kpc in IRAS 08339+6517. Both systems are revealed to be tidally interacting: Tol 1924-416 with ESO …
The H II Regions of the Damped Lyα Absorber SBS 1543+593
Turnshek, David A.; Rao, Sandhya M.; Pettini, Max +3 more
We report new imaging and spectroscopic observations of the damped Lyα absorber (DLA) galaxy SBS 1543+593, a nearby dwarf galaxy whose stellar disk is intersected by the sight line to the bright background QSO HS 1543+5921. Hubble Space Telescope imaging observations with WFPC2 in the F450W and F702W bands are used to measure the DLA galaxy's prop…
Quasi-simultaneous XMM-Newton and VLA observation of the non-thermal radio emitter HD 168112 (O5.5III(f+))
Blomme, R.; Rauw, G.; De Becker, M. +8 more
We report the results of a multiwavelength study of the non-thermal radio emitter HD 168112 (O5.5III(f+)). The detailed analysis of two quasi-simultaneous XMM-Newton and VLA observations reveals strong variability of this star both in the X-ray and radio ranges. The X-ray observations separated by five months reveal a decrease of the X-…
The spectral energy distributions of the revised 200-mJy sample
Bondi, M.; Browne, I. W. A.; Antón, S. +2 more
We address the question of why low-luminosity radio sources with similar flat radio spectra show a range of optical activity. The investigation is based on the spectral energy distributions (SEDs) of objects from the 200-mJy sample. We gathered new data from the VLA at 43 GHz, from SCUBA in the JCMT at 2000, 1350 and 850 µm, and from the ISO…