Publications (45)
A Comparative Study of Globular Cluster Systems in UGC 9799 and NGC 1129
Myung Gyoon Lee, Eunhyeuk Kim, Doug Geisler +2
We present a preliminary analysis of HST-WFPC2 observations of globular cluster systems in the two brightest galaxies, UGC 9799 (cD) and NGC 1129 (non-cD), located in the center of…
The 2dF Galaxy Redshift Survey: correlation with the ROSAT-ESO Flux Limited X-ray (REFLEX) galaxy cluster survey
Matt Hilton, Chris Collins, Roberto De Propris +25
The ROSAT-ESO Flux Limited X-ray (REFLEX) galaxy cluster survey and the 2dF Galaxy Redshift Survey (2dFGRS) respectively comprise the largest, homogeneous X-ray selected cluster ca…
The 2dF Galaxy Redshift Survey: Final Data Release
Matthew Colless, Bruce A. Peterson, Carole Jackson +25
The 2dF Galaxy Redshift Survey (2dFGRS) has obtained spectra for 245591 sources, mainly galaxies, brighter than a nominal extinction-corrected magnitude limit of b_J=19.45. Reliabl…
The 2dF Galaxy Redshift Survey: The environmental dependence of galaxy star formation rates near clusters
Ian Lewis, Michael Balogh, Roberto De Propris +30
We have measured the equivalent width of the H-alpha emission line for 11006 galaxies brighter than M_b=-19 (LCDM) at 0.05<z<0.1 in the 2dF Galaxy Redshift Survey (2dF), in the fie…
A Single-chord Stellar Occultation by the Extreme Trans-Neptunian Object (541132) LeleÄkÅ«honua
Marc W. Buie, Rodrigo Leiva, John M. Keller +32
A stellar occultation by the extreme large-perihelion trans-Neptunian object (541132) LeleÄkÅ«honua (also known by the provisional designation of 2015 TG387) was predicted by the…
The HST/ACS Coma Cluster Survey IV. Intergalactic Globular Clusters and the Massive Globular Cluster System at the Core of the Coma Galaxy Cluster
Eric W. Peng, Henry C. Ferguson, Paul Goudfrooij +21
Intracluster stellar populations are a natural result of tidal interactions in galaxy clusters. Measuring these populations is difficult, but important for understanding the assemb…
Gemini/GMOS Spectroscopy of the Spheroid and Globular Cluster System of NGC 3923
Mark A. Norris, Ray M. Sharples, Terry Bridges +8
We present a technique to extract ultra-deep diffuse-light spectra from the standard multi-object spectroscopic observations used to investigate extragalactic globular cluster (GC)…
The 2dF Galaxy Redshift Survey: Wiener Reconstruction of the Cosmic Web
Pirin Erdogdu, Ofer Lahav, Saleem Zaroubi +27
We reconstruct the underlying density field of the 2 degree Field Galaxy Redshift Survey (2dFGRS) for the redshift range 0.035<z<0.200 using the Wiener Filtering method. The Wiener…
Two formation paths for cluster dwarf galaxies?
Bianca M. Poggianti, Nobunari Kashikawa, Terry Bridges +5
A surprising result of our recent spectroscopic survey of galaxies in the Coma cluster has been the discovery of a possible bimodal distribution in the metallicities of faint galax…
The 2dF Galaxy Redshift Survey: The Number and Luminosity Density of Galaxies
Nicholas Cross, Simon P. Driver, Warrick Couch +29
We present the bivariate brightness distribution (BBD) for the 2dF Galaxy Redshift Survey (2dFGRS) based on a preliminary subsample of 45,000 galaxies. The BBD is an extension of t…
The Sizes and Albedos of Centaurs 2014 YY and 2013 NL from Stellar Occultation Measurements by RECON
Ryder H. Strauss, Rodrigo Leiva, John M. Keller +46
In 2019, the Research and Education Collaborative Occultation Network (RECON) obtained multiple-chord occultation measurements of two centaur objects: 2014 YY on 2019 Januar…
Molecular Gas in the Perseus Cooling Flow Galaxy, NGC 1275
Terry Bridges, Judith Irwin
The central arcminute of the Perseus cooling flow galaxy, NGC 1275, has been mapped with the JCMT in 12CO(2-1) at 21 arcsec resolution, with detections out to at least 36 arcsec (1…
A Photometric and Spectroscopic Study of Dwarf and Giant Galaxies in the Coma Cluster - IV. The Luminosity Function
Bahram Mobasher, Matthew Colless, David Carter +7
A large spectroscopic survey is constructed of galaxies in the Coma cluster. The survey covers a wide area (1 deg) to deep magnitudes (R ~ 19.5), covering both the core (high d…
Calibrating Photometric Redshifts of Luminous Red Galaxies
Nikhil Padmanabhan, Tamas Budavari, David J. Schlegel +20
We discuss the construction of a photometric redshift catalogue of Luminous Red Galaxies (LRGs) from the Sloan Digital Sky Survey (SDSS), emphasizing the principal steps necessary…
Gemini/GMOS Imaging of Globular Clusters in the Virgo Galaxy NGC 4649 (M60)
Duncan A. Forbes, Favio Raul Faifer, Juan Carlos Forte +6
We present Sloan g and i imaging from the GMOS instrument on the Gemini North telescope for the globular cluster (GC) system around the Virgo galaxy NGC 4649 (M60). Our three point…
Accreted versus In Situ Milky Way Globular Clusters
Duncan A. Forbes, Terry Bridges
Here we examine the Milky Way's GC system to estimate the fraction of accreted versus in situ formed GCs. We first assemble a high quality database of ages and metallicities for 93…
The Globular Cluster Kinematics and Galaxy Dark Matter Content of NGC 3923
Mark A. Norris, Karl Gebhardt, Ray M. Sharples +9
This paper presents further results from our spectroscopic study of the globular cluster (GC) system of the group elliptical NGC 3923. From observations made with the GMOS instrume…
The 2dF-SDSS LRG and QSO Survey: The spectroscopic QSO catalogue
Scott M. Croom, Gordon T. Richards, Tom Shanks +27
We present the final spectroscopic QSO catalogue from the 2dF-SDSS LRG and QSO (2SLAQ) Survey. This is a deep, 18<g<21.85 (extinction corrected), sample aimed at probing in detail…
Spectroscopy of Globular Clusters out to Large Radius in the Sombrero Galaxy
Terry Bridges, Katherine Rhode, Steve Zepf +1
We present new velocities for 62 globular clusters in M104 (NGC 4594, the Sombrero Galaxy), 56 from 2dF on the AAT and 6 from Hydra on WIYN. Combined with previous data, we have a…
The 2dF Galaxy Redshift Survey: Clustering properties of radio galaxies
Manuela Magliocchetti, Steve J. Maddox, Ed Hawkins +24
The clustering properties of local, S_{1.4 GHz} > 1 mJy, radio sources are investigated for a sample of 820 objects drawn from the joint use of the FIRST and 2dF Galaxy Redshift su…
Gemini/GMOS Imaging of Globular Cluster Systems in Five Early-type Galaxies
Favio R. Faifer, Juan C. Forte, Mark A. Norris +7
This paper presents deep high quality photometry of globular cluster (GC) systems belonging to five early-type galaxies covering a range of mass and environment. Photometric data w…
The 2dF Galaxy Redshift Survey: Spherical Harmonics analysis of fluctuations in the final catalogue
Will J. Percival, Daniel Burkey, Alan Heavens +26
We present the result of a decomposition of the 2dFGRS galaxy overdensity field into an orthonormal basis of spherical harmonics and spherical Bessel functions. Galaxies are expect…
The 2dF Galaxy Redshift Survey: The amplitudes of fluctuations in the 2dFGRS and the CMB, and implications for galaxy biasing
Ofer Lahav, Sarah L. Bridle, Will J. Percival +26
We compare the amplitudes of fluctuations probed by the 2dF Galaxy Redshift Survey and by the latest measurements of the Cosmic Microwave Background anisotropies. By combining the…
Small and Moderate Aperture Telescopes for Research and Education
Aaron C. Boley, Terry Bridges, Paul Hickson +5
In this white paper (WP), we highlight several examples of small and moderate aperture telescopes that are being used for education and/or research. We further discuss potential co…
The 2dF Galaxy Redshift Survey: The blue galaxy fraction and implications for the Butcher-Oemler effect
Roberto De Propris, Matthew Colless, John Peacock +28
We derive the fraction of blue galaxies in a sample of clusters at z < 0.11 and the general field at the same redshift. The value of the blue fraction is observed to depend on the…
Parameter constraints for flat cosmologies from CMB and 2dFGRS power spectra
Will J. Percival, Will Sutherland, John A. Peacock +24
We constrain flat cosmological models with a joint likelihood analysis of a new compilation of data from the cosmic microwave background (CMB) and from the 2dF Galaxy Redshift Surv…
The 2dF Galaxy Redshift Survey: The power spectrum and the matter content of the universe
Will J. Percival, Carlton M. Baugh, Joss Bland-Hawthorn +24
The 2dF Galaxy Redshift Survey has now measured in excess of 160000 galaxy redshifts. This paper presents the power spectrum of the galaxy distribution, calculated using a direct F…
A Wide-Field Spectroscopic Survey In The Cluster Lens Cl0024+17
Oliver Czoske, Genevieve Soucail, Jean-Paul Kneib +3
We present a detailed velocity histogram from a wide-field spectroscopic survey in the field of the cluster lens Cl0024 showing an unrelaxed foreground structure in addition to the…
The 2dF Galaxy Redshift Survey: the local E+A galaxy population
Chris Blake, Michael Pracy, Warrick Couch +27
We select a sample of low-redshift (z ~ 0.1) E+A galaxies from the 2dF Galaxy Redshift Survey (2dFGRS). The spectra of these objects are defined by strong hydrogen Balmer absorptio…
Globular Clusters as Probes of the Virgo gE NGC 4472
Terry Bridges, Keith Ashman, Mike Beasley +4
We present radial velocities for 144 globular clusters around the Virgo gE NGC 4472 (M49), and ages and metallicities from co-added spectra of 131 clusters. We confirm our earlier…
A SLUGGS and Gemini/GMOS combined study of the elliptical galaxy M60: wide-field photometry and kinematics of the globular cluster system
Vincenzo Pota, Jean P. Brodie, Terry Bridges +20
We present new wide-field photometry and spectroscopy of the globular clusters (GCs) around NGC 4649 (M60), the third brightest galaxy in the Virgo cluster. Imaging of NGC 4649 was…
Evidence for metallicity spreads in three massive M31 globular clusters
Isaura Fuentes-Carrera, Pascale Jablonka, Ata Sarajedini +3
We quantify the intrinsic width of the red giant branches of three massive globular clusters in M31 in a search for metallicity spreads within these objects. We present HST/ACS obs…
A wide-field spectroscopic survey of the cluster of galaxies Cl0024+1654: I. The catalogue
Oliver Czoske, Jean-Paul Kneib, Genevieve Soucail +3
We present the catalogue of a wide-field CFHT/WHT spectroscopic survey of the lensing cluster Cl0024+1654 at z=0.395. This catalogue contains 618 new spectra, of which 581 have ide…
The 2dF Galaxy Redshift Survey: Near Infrared Galaxy Luminosity Functions
Shaun Cole, Peder Norberg, Carlton Baugh +24
We combine the 2MASS extended source catalogue and the 2dFGRS to produce an IR selected galaxy catalogue with 17,173 measured redshifts. We use this extensive dataset to estimate t…
2dF Spectroscopy of M104 Globular Clusters
Terry Bridges, Ken Freeman, Katherine Rhode +1
We present preliminary results of 2dF spectroscopy of globular clusters in The Sombrero (M104). We find 56 new clusters, and compile a total sample of 103 velocities combined with…
Kinematics of Globular Clusters in M49 and M87
Terry Bridges
We present recent multi-object spectroscopy of globular clusters in the Virgo gEs M49 and M87. In M49, we have a total of 144 confirmed clusters out to 8 arcmin radius (~6 R_eff or…
Evidence for a non-zero Lambda and a low matter density from a combined analysis of the 2dF Galaxy Redshift Survey and Cosmic Microwave Background Anisotropies
George Efstathiou, Stephen Moody, John A. Peacock +24
We perform a joint likelihood analysis of the power spectra of the 2dF Galaxy Redshift Survey (2dFGRS) and the cosmic microwave background (CMB) anisotropies under the assumptions…
Gemini/GMOS Spectra of Globular Clusters in the Virgo Giant Elliptical NGC 4649
Michael Pierce, Terry Bridges, Duncan A. Forbes +8
NGC 4649 (M60) is one of a handful of giant Virgo ellipticals. We have obtained Gemini/GMOS spectra for 38 GCs associated with this galaxy. Applying the multi-index chi^2 minimisat…
Substructure Analysis of Selected Low Richness 2dFGRS Clusters of Galaxies
William S. Burgett, Michael M. Vick, David S. Davis +30
Complementary one-, two-, and three-dimensional tests for detecting the presence of substructure in clusters of galaxies are applied to recently obtained data from the 2dF Galaxy R…
A 2dF spectroscopic study of globular clusters in NGC 5128: Probing the formation history of the nearest giant Elliptical
Michael Beasley, Terry Bridges, Eric Peng +4
We have performed a spectroscopic study of globular clusters (GCs) in the giant elliptical NGC 5128 using the 2dF facility at the Anglo-Australian telescope. We obtained integrated…
The 2dF Galaxy Redshift Survey: A targeted study of catalogued clusters of galaxies
Roberto De Propris, Warrick Couch, Matthew Colless +27
We have carried out a study of known clusters within the 2dF Galaxy Redshift Survey (2dFGRS) observed areas and have identified 431 Abell, 173 APM and 343 EDCC clusters. Precise re…
Halo Kinematics
Terry Bridges
I summarize recent observations of the kinematics of hot tracers in elliptical galaxy halos (globular clusters, planetary nebulae, and integrated stellar light), and what these tel…
Globular Clusters in Early-Type Galaxies with GMOS
Terry Bridges, Mike Beasley, Favio Faifer +6
We present recent results from our long-term Gemini/GMOS study of globular clusters in early-type galaxies. To date, we have obtained photometry and spectroscopy for clusters in NG…
Galaxy ecology: groups and low-density environments in the SDSS and 2dFGRS
Michael Balogh, Vince Eke, Chris Miller +34
We analyse the observed correlation between galaxy environment and H-alpha emission line strength, using volume-limited samples and group catalogues of 24968 galaxies drawn from th…
Gemini/GMOS Spectra of Globular Clusters in the Leo Group Elliptical NGC 3379
Michael Pierce, Michael A. Beasley, Duncan A. Forbes +8
We have obtained Gemini/GMOS spectra for 22 GCs associated with NGC 3379. We derive ages, metallicities and alpha-element abundance ratios from simple stellar population models usi…