Search Publications
SEDEBLEND: a new method for deblending spectral energy distributions in confused imaging
Scott, Douglas; Swinbank, Mark; MacKenzie, Todd P.
For high-redshift submillimetre or millimetre sources detected with single-dish telescopes, interferometric follow-up has shown that many are multiple submillimetre galaxies blended together. Confusion-limited Herschel observations of such targets are also available, and these sample the peak of their spectral energy distribution (SED) in the far-…
Digging process in NGC 6951: the molecular disc bumped by the jet
Ricci, T. V.; Steiner, J. E.; May, D. +2 more
We present a study of the central 200 pc of the galaxy NGC 6951, SAB(rs)bc, an active twin of the Milky Way, at a distance of 24 Mpc. Its nucleus has been observed in the optical with the Integral Field Unit of the Gemini Multi-Object Spectrograph, showing an outflow, and with the HST/ACS, revealing two extended structures with similar orientation…
Ultraviolet spectral synthesis of HD 72660
Landstreet, J. D.; Golriz, S. S.
The study of chemical abundances in stellar atmosphere provides a useful tool to investigate the formation and evolution history of stars. The optical wavelength range has been used almost exclusively in the past to determine the elemental abundance in A-type stars. We use high-resolution, high signal-to-noise ultraviolet spectra obtained from the…
Constraining MOND using the vertical motion of stars in the solar neighbourhood
Margalit, Ben; Shaviv, Nir J.
Stars with a different vertical motion relative to the Galactic disc have a different average acceleration. According to modified Newtonian dynamics (MOND) theories, they should therefore have a different average orbital velocity while revolving around the Milky Way. We show that this property can be used to constrain MOND theories by studying sta…
Discovery of a long-lived, high-amplitude dusty infrared transient
Maccarone, T. J.; Torres, M. A. P.; Nelemans, G. +15 more
We report the detection of an infrared-selected transient which has lasted at least five years, first identified by a large mid-infrared and optical outburst from a faint X-ray source detected with the Chandra X-ray Observatory. In this paper we rule out several scenarios for the cause of this outburst, including a classical nova, a luminous red n…
Low-end mass function of the Quintuplet cluster
Kim, Sungsoo S.; Shin, Jihye
The Quintuplet and Arches clusters, which were formed in the harsh environment of the Galactic Centre (GC) a few million years ago, have been excellent targets for studying the effects of a star-forming environment on the initial mass function (IMF). In order to estimate the shape of the low-end IMF of the Arches cluster, Shin & Kim devised a …
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…