Search Publications
The extreme ultraviolet spectra of low-redshift radio-loud quasars
O'Dea, Christopher P.; Punsly, Brian; Reynolds, Cormac +1 more
This paper reports on the extreme ultraviolet (EUV) spectrum of three low-redshift (z ∼ 0.6) radio-loud quasars, 3C 95, 3C 57 and PKS 0405-123. The spectra were obtained with the Cosmic Origins Spectrograph of the Hubble Space Telescope. The bolometric thermal emission, Lbol, associated with the accretion flow is a large fraction of the…
GeMs/GSAOI observations of La Serena 94: an old and far open cluster inside the solar circle
Carrasco, Eleazar R.; Roman-Lopes, Alexandre; Neichel, Benoit +2 more
Physical properties were derived for the candidate open cluster La Serena 94, recently unveiled by the VISTA Variables in the Vía Láctea (VVV) survey. Thanks to the exquisite angular resolution provided by Gemini South multiconjugate adaptive optics system/Gemini South Adaptive Optics Imager (GeMS/GSAOI), we could characterize this system in detai…
Simultaneously modelling far-infrared dust emission and its relation to CO emission in star-forming galaxies
Klessen, Ralf S.; Cormier, Diane; Roman-Duval, Julia +6 more
We present a method to simultaneously model the dust far-infrared (FIR) spectral energy distribution (SED) and the total infrared - carbon monoxide (CO) integrated intensity (SIR-ICO) relationship. The modelling employs a hierarchical Bayesian (HB) technique to estimate the dust surface density, temperature (Teff),…
XMM-Newton studies of the supernova remnant G350.0-2.0
Shternin, P.; Zyuzin, D.; Danilenko, A. +2 more
We report the results of XMM-Newton observations of the Galactic mixed-morphology supernova remnant G350.0-2.0. Diffuse thermal X-ray emission fills the north-western part of the remnant surrounded by radio shell-like structures. We did not detect any X-ray counterpart of the latter structures, but found several bright blobs within the diffuse emi…
Reconstructing merger timelines using star cluster age distributions: the case of MCG+08-11-002
Kewley, Lisa J.; Davies, Rebecca L.; U, Vivian +3 more
We present near-infrared imaging and integral field spectroscopy of the centre of the dusty luminous infrared galaxy merger MCG+08-11-002, taken using the Near InfraRed Camera 2 (NIRC2) and the OH-Suppressing InfraRed Imaging Spectrograph (OSIRIS) on Keck II. We achieve a spatial resolution of ∼25 pc in the K band, allowing us to resolve 41 star c…
94 Ceti: a triple star with a planet and dust disc
Faramaz, V.; Wiegert, J.; Cruz-Saenz de Miera, F.
94 Ceti is a triple star system with a circumprimary gas giant planet and far-infrared excess. Such excesses around main sequence stars are likely due to debris discs, and are considered as signposts of planetary systems and, therefore, provide important insights into the configuration and evolution of the planetary system. Consequently, to learn …
LOTUS: a low-cost, ultraviolet spectrograph
Marchant, J. M.; Steele, I. A.; Snodgrass, C. +10 more
We describe the design, construction and commissioning of a simple, low-cost long-slit spectrograph for the Liverpool Telescope. The design is optimized for near-UV and visible wavelengths and uses all transmitting optics. It exploits the instrument focal plane field curvature to partially correct axial chromatic aberration. A stepped slit provide…
First performance of the GeMS + GMOS system - 1. Imaging
Hibon, Pascale; Rigaut, Francois; Carrasco, Eleazar R. +6 more
During the commissioning of the Gemini MCAO System (GeMS), we had the opportunity to obtain data with the Gemini Multi-Object Spectrograph (GMOS), the most utilized instrument at Gemini South Observatory, in 2012 March and May. Several globular clusters were observed in imaging mode that allowed us to study the performance of this new and untested…
Bright stars observed by FIMS/SPEAR
Edelstein, Jerry; Jo, Young-Soo; Choi, Yeon-Ju +5 more
In this paper, we present a catalogue of the spectra of bright stars observed during the sky survey using the Far-Ultraviolet Imaging Spectrograph (FIMS), which was designed primarily to observe diffuse emissions. By carefully eliminating the contamination from the diffuse background, we obtain the spectra of 70 bright stars observed for the first…
A spiral galaxy's mass distribution uncovered through lensing and dynamics
van de Ven, Glenn; Dutton, Aaron A.; Trick, Wilma H.
We investigate the matter distribution of a spiral galaxy with a counter-rotating stellar core, SDSS J1331+3628 (J1331), independently with gravitational lensing and stellar dynamical modelling. By fitting a gravitational potential model to a quadruplet of lensing images around J1331's bulge, we tightly constrain the mass inside the Einstein radiu…