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The Shapley Supercluster. III. Collapse Dynamics and Mass of the Central Concentration
We present the first application of a spherical collapse model to a supercluster of galaxies. Positions and redshifts of ~3000 galaxies in the Shapley supercluster (SSC) are used to define velocityExpand
A distance of 13 Mpc resolves the claimed anomalies of the galaxy lacking dark matter
The claimed detection of a diffuse galaxy lacking dark matter represents a possible challenge to our understanding of the properties of these galaxies and galaxy formation in general. The galaxy,Expand
Structure and dynamics of the Shapley Supercluster Velocity catalogue, general morphology and mass
We present results of our wide-field redshift survey of galaxies in a 285 square degree region of the Shapley Supercluster (SSC), based on a set of 10 529 velocity measurements (including 1201 newExpand
Gemini multiconjugate adaptive optics system review – II. Commissioning, operation and overall performance
The Gemini Multi-conjugate Adaptive Optics System - GeMS, a facility instrument mounted on the Gemini South telescope, delivers a uniform, near di↵raction limited images at near infrared wavelengthsExpand
A likely decade-long sustained tidal disruption event
Multiwavelength flares from tidal disruption and accretion of stars can be used to find and study otherwise dormant massive black holes in galactic nuclei1. Previous well-monitored candidate flaresExpand
Astrometric performance of the Gemini multiconjugate adaptive optics system in crowded fields
The Gemini multiconjugate adaptive optics system (GeMS) is a facility instrument for the Gemini South telescope. It delivers uniform, near-diffraction-limited image quality at near-infraredExpand
The Shapley Supercluster. II. Spectroscopic Observations in a Wide Area and General Morphology
We report 2868 new multiobject spectroscopic measurements of galaxy redshifts in an area roughly 12° × 6° (right ascension × declination) centered on the Shapley Supercluster (SSC). These correspondExpand
Generalized SCIDAR Measurements at San Pedro Mártir. II. Wind Profile Statistics
We present the results of monitoring the speed of optical turbulent layers in the atmosphere above San Pedro Martir, Mexico, during 15 nights in 2000 May. The data were obtained using the generalizedExpand
A luminous X-ray outburst from an intermediate-mass black hole in an off-centre star cluster
A unique signature for the presence of massive black holes in very dense stellar regions is occasional giant-amplitude outbursts of multi-wavelength radiation from tidal disruption and subsequentExpand
Early-type galaxies at z = 1.3 - I. The Lynx supercluster: cluster and groups at z = 1.3. Morphology and color-magnitude relation
We confirm the detection of three groups in the Lynx supercluster, at z ≈ 1.3, through spectroscopic follow-up and X-ray imaging, and we give estimates for their redshifts and masses. We study theExpand