Search Publications
The dust energy balance in the edge-on spiral galaxy NGC 4565
Gordon, Karl D.; De Looze, Ilse; Baes, Maarten +20 more
We combine new dust continuum observations of the edge-on spiral galaxy NGC 4565 in all Herschel/Spectral and Photometric Imaging Receiver (250, 350 and 500 µm) wavebands, obtained as part of the Herschel Reference Survey, and a large set of ancillary data (Spitzer, Sloan Digital Sky Survey, Galaxy Evolution Explorer) to analyse its dust ene…
Discovery of the benchmark metal-poor T8 dwarf BD +01° 2920B
Marocco, F.; Homeier, D.; Pinfield, D. J. +20 more
We have searched the Wide-field Infrared Survey Explorer first data release for widely separated (≤10 000 au) late T dwarf companions to Hipparcos and Gliese stars. We have discovered a new binary system containing a K-band suppressed T8p dwarf WISEP J142320.86+011638.1 and the mildly metal poor ([Fe/H] =-0.38 ± 0.06) primary BD +01° 2920 (HIP 703…
HerMES: point source catalogues from deep Herschel-SPIRE observations
Pérez-Fournon, I.; Rodighiero, G.; Valtchanov, I. +38 more
We describe the generation of single-band point source catalogues from submillimetre Herschel-SPIRE observations taken as part of the Science Demonstration Phase of the Herschel Multi-tiered Extragalactic Survey (HerMES). Flux densities are found by means of peak finding and the fitting of a Gaussian point-response function. With highly confused i…
Wide-field imaging of NGC 4365's globular cluster system: the third subpopulation revisited
Spitler, Lee R.; Forbes, Duncan A.; Blom, Christina
Analysis of the globular cluster (GC) system of the giant elliptical (E3) galaxy NGC 4365, from eight Hubble Space Telescope/Advanced Camera for Surveys pointings and a wide-field Subaru/Suprime-Cam image, is presented. Using magnitude, colour and size criteria, we obtain a catalogue of GC candidates. We also measure the photometric properties of …
Nuclear star clusters and the stellar spheroids of their host galaxies
Böker, Torsten; Knigge, Christian; Leigh, Nathan
We combine published photometry for the nuclear star clusters (NSCs) and stellar spheroids of 51 low-mass, early-type galaxies in the Virgo cluster with empirical mass-to-light ratios, in order to complement previous studies that explore the dependence of NSC masses on various properties of their host galaxies. We confirm a roughly linear relation…
The cosmological analysis of X-ray cluster surveys - II. Application of the CR-HR method to the XMM archive
Altieri, B.; Valtchanov, I.; Pierre, M. +5 more
We have processed 2774 high galactic observations from the XMM archive (as of 2010 May) and extracted a serendipitous catalogue of some 850 clusters of galaxies based on purely X-ray criteria, following the methodology developed for the XMM-Large-Scale Survey. Restricting the sample to the highest signal-to-noise ratio objects (347 clusters), we p…
The star formation history and dust content in the far outer disc of M31
Lewis, Geraint F.; McConnachie, Alan W.; Ibata, Rodrigo A. +7 more
We present a detailed analysis of two fields located 26 kpc (∼5 radial scalelengths) from the centre of M31 along the south-west semimajor axis of the disc. One field samples the major axis populations - the Outer Disc field - while the other is offset by ∼18 arcmin and samples the warp in the stellar disc - the warp field. The colour-magnitude di…
Triggered star formation in the inner filament of Centaurus A
Mutchler, Max; Whitmore, Bradley C.; Shabala, Stanislav S. +7 more
We present recent Hubble Space Telescope observations of the inner filament of Centaurus A, using the new Wide Field Camera 3 (WFC3) F225W, F657N and F814W filters. We find a young stellar population near the south-west tip of the filament. Combining the WFC3 data set with archival Advanced Camera for Surveys (ACS) F606W observations, we are able …
The G305 star-forming complex: the central star clusters Danks 1 and Danks 2
Kudritzki, Rolf-Peter; Figer, Donald F.; Clark, J. S. +7 more
The G305 H II complex (G305.4+0.1) is one of the most massive star-forming structures yet identified within the Galaxy. It is host to many massive stars at all stages of formation and evolution, from embedded molecular cores to post-main-sequence stars. Here, we present a detailed near-infrared analysis of the two central star clusters Danks 1 and…
A newly discovered young massive star cluster at the far end of the Galactic Bar
Figer, Donald F.; Davies, Ben; Najarro, Francisco +4 more
We present a near-infrared study of the candidate star cluster Mercer 81, located at the centre of the G338.4+0.1 H II region and close to the TeV gamma-ray source HESS 1640-465. Using Hubble Space Telescope/NICMOS imaging and VLT/ISAAC spectroscopy, we have detected a compact and highly reddened cluster of stars, although the bright stars in the …