Search Publications
The Herschel Virgo Cluster Survey - XII. FIR properties of optically selected Virgo cluster galaxies
Ciesla, L.; Bomans, D. J.; Boquien, M. +24 more
The Herschel Virgo Cluster Survey (HeViCS) is the deepest, confusion-limited survey of the Virgo Cluster at far-infrared (FIR) wavelengths. The entire survey at full depth covers ∼55 deg2 in five bands (100-500 µm), encompassing the areas around the central dominant elliptical galaxies (M87, M86 and M49) and extends as far as the …
On the association between core-collapse supernovae and H ii regions
Crowther, Paul A.
Previous studies of the location of core-collapse supernovae (ccSNe) in their host galaxies have variously claimed an association with H ii regions; no association or an association only with hydrogen-deficient ccSNe. Here, we examine the immediate environments of 39 ccSNe whose positions are well known in nearby (≤15 Mpc), low-inclination (≤65°) …
The SWELLS survey - V. A Salpeter stellar initial mass function in the bulges of massive spiral galaxies
Treu, Tommaso; Marshall, Philip J.; Auger, M. W. +6 more
Recent work has suggested that the stellar initial mass function (IMF) is not universal, but rather is correlated with galaxy stellar mass, stellar velocity dispersion or morphological type. In this paper, we investigate variations of the IMF within individual galaxies. For this purpose, we use strong lensing and gas kinematics to measure independ…
A new way to measure supermassive black hole spin in accretion disc-dominated active galaxies
Done, Chris; Ward, Martin; Jin, C. +1 more
We show that disc continuum fitting can be used to constrain black hole spin in a subclass of narrow-line Seyfert 1 (NLS1) active galactic nuclei as their low mass and high mass accretion rate means that the disc peaks at energies just below the soft X-ray bandpass. We apply the technique to the NLS1 PG1244+026, where the optical/UV/X-ray spectrum…
On the association of the ultraluminous X-ray sources in the Antennae galaxies with young stellar clusters
Fabrika, Sergei; Poutanen, Juri; Greiner, Jochen +2 more
The nature of the ultraluminous X-ray sources (ULXs) in the nearby galaxies is a matter of debates. One of the popular hypothesis associates them with accretion at a sub-Eddington rate on to intermediate-mass black holes. Another possibility is a stellar-mass black hole in a high-mass X-ray binary accreting at super-Eddington rates. In this paper,…
Gas accretion as a dominant formation mode in massive galaxies from the GOODS NICMOS Survey
Conselice, Christopher J.; Bluck, Asa F. L.; Mortlock, Alice +2 more
The ability to resolve all processes which drive galaxy formation is one of the most fundamental goals in extragalactic astronomy. While star formation rates and the merger history are now measured with increasingly high certainty, the role of gas accretion from the intergalactic medium in supplying gas for star formation still remains largely unk…
Intrinsic galaxy shapes and alignments - I. Measuring and modelling COSMOS intrinsic galaxy ellipticities
Schrabback, T.; Hoekstra, H.; Schneider, P. +5 more
The statistical properties of the ellipticities of galaxy images depend on how galaxies form and evolve, and therefore constrain models of galaxy morphology, which are key to the removal of the intrinsic alignment contamination of cosmological weak lensing surveys, as well as to the calibration of weak lensing shape measurements. We construct such…
The ATLAS3D Project - XXIII. Angular momentum and nuclear surface brightness profiles
Krajnović, Davor; Emsellem, Eric; Sarzi, Marc +22 more
We investigate nuclear light profiles in 135 ATLAS3D galaxies for which the Hubble Space Telescope (HST) imaging is available and compare them to the large-scale kinematics obtained with the SAURON integral-field spectrograph. Specific angular momentum, λR, correlates with the shape of nuclear light profiles, where, as sugges…
Focusing on warm dark matter with lensed high-redshift galaxies.
Pacucci, F.; Mesinger, A.; Haiman, Z.
We propose a novel use of high-redshift galaxies, discovered in deep Hubble Space Telescope (HST) fields around strong lensing clusters. These fields probe small comoving volumes (∼103 Mpc3) at high magnification (µ ≳ 10) and can detect otherwise inaccessible ultra-faint galaxies. Even a few galaxies found in such small…
Rotation in NGC 2264: a study based on CoRoT photometric observations
Bouvier, J.; Micela, G.; Favata, F. +2 more
Rotation is one of the key stellar parameters which undergo substantial evolution during the stellar lifetime, in particular during the early stages. Stellar rotational periods can be determined on the basis of the periodic modulation of starlight produced by non-uniformities on the surface of the stars, due to manifestation of stellar activity. W…