Publications (122)
MACHO COLLABORATION SEARCH FOR BARYONIC DARK MATTER VIA GRAVITATIONAL MICROLENSING
K. Griest, C. Alcock, R. A. Allsman +15
Results are presented from the MACHO collaboration gravitational microlensing search. The experiment and the nearly 50 microlensing events that have been detected are described. Li…
The 2dF Galaxy Redshift Survey: stochastic relative biasing between galaxy populations
Vivienne Wild, John A. Peacock, Ofer Lahav +26
It is well known that the clustering of galaxies depends on galaxy type.Such relative bias complicates the inference of cosmological parameters from galaxy redshift surveys, and is…
The IRAS PSCz Dipole
M. Rowan-Robinson, J. Sharpe, S. J. Oliver +12
We use the PSCz IRAS galaxy redshift survey to analyze the cosmological galaxy dipole out to a distance 300 h Mpc. The masked area is filled in three different ways, firstly…
Likelihood Analysis of the Local Group Acceleration
I. Schmoldt, E. Branchini, L. Teodoro +10
We compute the acceleration on the Local Group using 11206 IRAS galaxies from the recently completed all-sky PSCz redshift survey. Measuring the acceleration vector in redshift spa…
The MACHO Project 9 Million Star Color-Magnitude Diagram of the Large Magellanic Cloud
C. Alcock, R. A. Allsman, D. R. Alves +23
We present a 9 million star color-magnitude diagram (9M CMD) of the LMC bar. The 9M CMD reveals a complex superposition of different age and metallicity stellar populations, with i…
The 2dF Galaxy Redshift Survey: The b_J-band galaxy luminosity function and survey selection function
P. Norberg, S. Cole, C. Baugh +25
We use more than 110500 galaxies from the 2dF galaxy redshift survey (2dFGRS) to estimate the b_J-band galaxy luminosity function at redshift z=0, taking account of evolution, the…
A 421 d Activity Cycle in the BeX Recurrent Transient A0538-66 from MACHO monitoring
C. Alcock, R. A. Allsman, D. R. Alves +23
We present a ~ 5-yr optical light curve of the recurrent Be/X-ray transient A0538-66 obtained as a by-product of the MACHO Project. These data reveal both a long-term modulation at…
The fourth data release of the Kilo-Degree Survey: ugri imaging and nine-band optical-IR photometry over 1000 square degrees
K. Kuijken, C. Heymans, A. Dvornik +20
The Kilo-Degree Survey (KiDS) is an ongoing optical wide-field imaging survey with the OmegaCAM camera at the VLT Survey Telescope, specifically designed for measuring weak gravita…
The MACHO Project LMC Variable Star Inventory: I. Beat Cepheids - Conclusive Evidence for the Excitation of the Second Overtone in Classical Cepheids
C. Alcock, R. A. Allsman, T. S. Axelrod +13
We report the discovery of 45 beat Cepheids in the Large Magellanic Cloud (LMC) using the MACHO Project photometry database. The variables which are pulsating simultaneously in two…
Progress of the design of the 12-m optical, Wide-field Spectroscopic Telescope (WST)
P. Dierickx, G. Gausachs, C. Cudennec +16
The Wide-Field Spectroscopic Telescope (WST) is a 12-m class, Alt-Az optical telescope providing two simultaneous foci, 2 degrees and 3 by 3 arc minutes respectively, for Multi-Obj…
The MACHO Project LMC Microlensing Results from the First Two Years and the Nature of the Galactic Dark Halo
C. Alcock, R. A. Allsman, D. Alves +16
The MACHO Project is a search for dark matter in the form of massive compact halo objects (Machos). Photometric monitoring of millions of stars in the Large Magellanic Cloud (LMC),…
The MACHO Project Large Magellanic Cloud Variable Star Inventory. VIII. The Recent Star Formation History of the LMC from the Cepheid Period Distribution
C. Alcock, R. A. Allsman, D. R. Alves +20
We present an analysis of the period distribution of Cepheids in the Large Magellanic Cloud, based on data obtained by the MACHO microlensing experiment and on a previo…
The Topology of the IRAS Point Source Catalogue Redshift Survey
A. Canavezes, V. Springel, S. J. Oliver +10
We investigate the topology of the new Point Source Catalogue Redshift Survey (PSCz) of IRAS galaxies by means of the genus statistic. The survey maps the local Universe with appro…
Planetary Microlensing from the MACHO Project
The MACHO Collaboration, D. P. Bennett, C. Alcock +19
We present the lightcurves of two microlensing events from the MACHO Project data that are likely to be due to lenses with masses similar to Jupiter's mass. Although the MACHO Proj…
UltraVISTA: a new ultra-deep near-infrared survey in COSMOS
H. J. McCracken, B. Milvang-Jensen, J. Dunlop +18
In this paper we describe the first data release of the UltraVISTA near-infrared imaging survey of the COSMOS field. We summarise the key goals and design of the survey and provide…
The 2dF Galaxy Redshift Survey: Galaxy luminosity functions per spectral type
D. S. Madgwick, O. Lahav, I. K. Baldry +24
We calculate the optical bj luminosity function of the 2dF Galaxy Redshift Survey (2dFGRS) for different subsets defined by their spectral properties. These spectrally selected sub…
The MACHO Data Pipeline
T. S. Axelrod, R. A. Allsman, P. J. Quinn +11
The MACHO experiment is searching for dark matter in the halo of the Galaxy by monitoring more than 20 million stars in the LMC and Galactic bulge for gravitational microlensing ev…
Theory of Exploring the Dark Halo with Microlensing 1: Power--Law Models
C. Alcock, R. A. Allsman, T. S. Axelrod +15
The detection of microlensing has opened the way for the development of new methods in galactic astronomy. This series of papers investigates what microlensing can teach us about t…
The MACHO Project Large Magellanic Cloud variable star inventory. XI. Frequency analysis of the fundamental mode RR Lyrae stars
C. Alcock, D. R. Alves, A. Becker +20
We have frequency analyzed 6391 variables classified earlier as fundamental mode RR Lyrae (RR0) stars in the MACHO database on the Large Magellanic Cloud (LMC). The overwhelming ma…
The MACHO Project LMC Variable Star Inventory: Classical Cepheids, AGB Variables, and the 9 Million Star Color-Magnitude Diagram
D. R. Alves, A. Basu, K. H. Cook +18
This paper has been withdrawn
Gravitational Microlensing Results from Macho
W. Sutherland, C. Alcock, R. Allsman +13
We provide a status report on our search for dark matter in our Galaxy in the form of massive compact halo objects (MACHOs), using gravitational microlensing of background stars. T…
A measurement of the cosmological mass density from clustering in the 2dF Galaxy Redshift Survey
J. A. Peacock, S. Cole, P. Norberg +25
The large-scale structure in the distribution of galaxies is thought to arise from the gravitational instability of small fluctuations in the initial density field of the universe.…
Possible Gravitational Microlensing of a Star in the Large Magellanic Cloud
C. Alcock, C. W. Akerlof, R. A. Allsman +15
There is now abundant evidence for the presence of large quantities of unseen matter surrounding normal galaxies, including our own. The nature of this `dark matter' is unk…
Radio sources in the 2dF Galaxy Redshift Survey - II. Local radio luminosity functions for AGN and star-forming galaxies at 1.4 GHz
Elaine M. Sadler, Carole A. Jackson, Russell D. Cannon +25
We have cross-matched the 1.4 GHz NRAO VLA Sky Survey (NVSS) with the first 210 fields observed in the 2dF Galaxy Redshift Survey (2dFGRS), covering an effective area of 325 square…
The 2dF Galaxy Redshift Survey: Power-spectrum analysis of the final dataset and cosmological implications
S. Cole, W. J. Percival, J. A. Peacock +28
We present a power spectrum analysis of the final 2dF Galaxy Redshift Survey, employing a direct Fourier method. The sample used comprises 221,414 galaxies with measured redshifts.…
Galaxy And Mass Assembly (GAMA): The Consistency of GAMA and WISE Derived Mass-to-Light Ratios
T. Kettlety, J. Hesling, S. Phillipps +11
Recent work has suggested that mid-IR wavelengths are optimal for estimating the mass-to-light ratios of stellar populations and hence the stellar masses of galaxies. We compare st…
Galactic Bulge Microlensing Events from the MACHO Collaboration
C. L. Thomas, K. Griest, P. Popowski +21
We present a catalog of 450 high signal-to-noise microlensing events observed by the MACHO collaboration between 1993 and 1999. The events are distributed throughout our fields and…
Is the LMC Microlensing Due to an Intervening Dwarf Galaxy?
The MACHO Collaboration, C. Alcock, R. A. Allsman +20
The recent suggestion that the microlensing events observed towards the Large Magellanic Cloud are due to an intervening Sgr-like dwarf galaxy is examined. A search for foreground…
A Comparison of The PSCz and Stromlo-APM Redshift Surveys
M. D. Seaborne, W. Sutherland, H. Tadros +9
We present a direct comparison of the clustering properties of two redshift surveys covering a common volume of space: the recently completed IRAS Point Source Catalogue redshift s…
Herschel-ATLAS: VISTA VIKING near-IR counterparts in the Phase 1 GAMA 9h data
S. Fleuren, W. Sutherland, L. Dunne +38
We identify near-infrared Ks band counterparts to Herschel-ATLAS sub-mm sources, using a preliminary object catalogue from the VISTA VIKING survey. The sub-mm sources are selected…
A new upper limit on the total neutrino mass from the 2dF Galaxy Redshift Survey
O. Elgaroy, O. Lahav, W. J. Percival +27
We constrain f_nu = Omega_nu / Omega_m, the fractional contribution of neutrinos to the total mass density in the Universe, by comparing the power spectrum of fluctuations derived…
The RR Lyrae Population of the Galactic Bulge from the MACHO Database
The MACHO Collaboration, C. Alcock, R. A. Allsman +21
Mean colors and magnitudes of RR Lyrae stars in 24 fields towards the Galactic bulge from the MACHO database are presented. Accurate mean reddenings are computed for these fields o…
The 2dF Galaxy Redshift Survey: luminosity functions by density environment and galaxy type
Darren J. Croton, Glennys R. Farrar, Peder Norberg +26
We use the 2dF Galaxy Redshift Survey to measure the dependence of the bJ-band galaxy luminosity function on large-scale environment, defined by density contrast in spheres of radi…
Recent Developments in Gravitational Microlensing and the Latest MACHO Results: Microlensing Towards the Galactic Bulge
D. P. Bennett, C. Alcock, R. A. Allsman +12
We review recent gravitational microlensing results from the EROS, MACHO, and OGLE collaborations, and present some details of the very latest MACHO results toward the Galactic Bul…
The MACHO Project LMC Variable Star Inventory: The Discovery of RV Tauri stars and New Type II Cepheids in the LMC
The MACHO Collaboration, C. Alcock, R. A. Allsman +19
We report the discovery of RV Tauri stars in the Large Magellanic Cloud. In light and colour curve behaviour, the RV Tauri stars appear to be a direct extension of the type II Ceph…
Real-time Detection of Gravitational Microlensing
M. R. Pratt, C. Alcock, R. A. Allsman +17
Real-time detection of microlensing has moved from proof of concept in 1994 to a steady stream of events this year. Global dissemination of these events by the MACHO and OGLE colla…
Galaxy And Mass Assembly (GAMA): end of survey report and data release 2
J. Liske, I. K. Baldry, S. P. Driver +67
The Galaxy And Mass Assembly (GAMA) survey is one of the largest contemporary spectroscopic surveys of low-redshift galaxies. Covering an area of ~286 deg^2 (split among five surve…
The MACHO Project LMC Variable Star Inventory. IX. Frequency Analysis of the First Overtone RR Lyrae Stars and the Indication for Nonradial Pulsations
C. Alcock, R. Allsman, D. R. Alves +26
More than 1300 variables classified provisionally as first overtone RR Lyrae pulsators in the MACHO variable star database of the Large Magellanic Cloud (LMC) have been subjected t…
Herschel-ATLAS: towards a sample of ~1000 strongly-lensed galaxies
J. González-Nuevo, A. Lapi, S. Fleuren +39
While the selection of strongly lensed galaxies with 500μm flux density S_500>100 mJy has proven to be rather straightforward (Negrello et al. 2010), for many applications it is i…
The 2dF Galaxy Redshift Survey: the luminosity function of cluster galaxies
Roberto De Propris, M. Colless, S. Driver +27
We have determined the composite luminosity function (LF) for galaxies in 60 clusters from the 2dF Galaxy Redshift Survey. The LF spans the range , and is…
The MACHO Project: Limits on Planetary Mass Dark Matter in the Galactic Halo from Gravitational Microlensing
C. Alcock, R. A. Allsman, D. Alves +15
The MACHO project has been monitoring about ten million stars in the Large Magellanic Cloud in the search for gravitational microlensing events caused by massive compact halo objec…
Pulsating Variable Stars in the MACHO Bulge database: The Semiregular Variables
D. Minniti, C. Alcock, R. A. Allsman +17
We review the pulsating stars contained in the top 24 fields of the MACHO bulge database, with special emphasis on the red semiregular stars. Based on period, amplitude and color c…
The MACHO Project HST Follow-Up: The Large Magellanic Cloud Microlensing Source Stars
C. A. Nelson, A. J. Drake, K. H. Cook +21
We present Hubble Space Telescope (HST) WFPC2 photometry of 13 microlensed source stars from the 5.7 year Large Magellanic Cloud (LMC) survey conducted by the MACHO Project. The mi…
RR Lyrae Stars in the MACHO Database
The MACHO Collaboration, D. Minniti, C. Alcock +18
The MACHO Project has catalogued RR Lyrae stars in the Large Magellanic Cloud, in the Galactic bulge, and 50 in the Sgr dwarf galaxy. These variables…
The Microlensing Event MACHO-99-BLG-22/OGLE-1999-BUL-32: An Intermediate Mass Black Hole, or a Lens in the Bulge
D. P. Bennett, A. C. Becker, J. J. Calitz +5
We present an re-analysis of the longest timescale gravitational microlensing event discovered to date: MACHO-99-BLG-22/OGLE-1999-BUL-32, which was discovered by both the MACHO and…
Calibration of the MACHO Photometry Database
C. Alcock, R. A. Allsman, D. R. Alves +18
The MACHO Project is a microlensing survey that monitors the brightnesses of 60 million stars in the Large Magellanic Cloud (LMC), Small Magellanic Cloud, and Galactic bulge. Our d…
Recent Microlensing Results from the MACHO Project
P. Popowski, C. A. Nelson, D. P. Bennett +19
We describe a few recent microlensing results from the MACHO Collaboration. The aim of the MACHO Project was the identification and quantitative description of dark and luminous ma…
The 2dF Galaxy Redshift Survey: Spectral Types and Luminosity Functions
S. R. Folkes, S. Ronen, I. Price +22
We describe the 2dF Galaxy Redshift Survey (2dFGRS), and the current status of the observations. In this exploratory paper, we apply a Principal Component Analysis to a preliminary…
Galaxy And Mass Assembly (GAMA): Spectroscopic analysis
A. M. Hopkins, S. P. Driver, S. Brough +79
The Galaxy And Mass Assembly (GAMA) survey is a multiwavelength photometric and spectroscopic survey, using the AAOmega spectrograph on the Anglo-Australian Telescope to obtain spe…
GAMA/H-ATLAS: The ultraviolet spectral slope and obscuration in galaxies
Dinuka B. Wijesinghe, Elisabete. da Cunha, Andrew. M. Hopkins +59
We use multiwavelength data from the Galaxy And Mass Assembly (GAMA) and Herschel ATLAS (H-ATLAS) surveys to compare the relationship between various dust obscuration measures in g…
The 2dF Galaxy Redshift Survey: galaxy clustering per spectral type
D. S. Madgwick, E. Hawkins, O. Lahav +25
We have calculated the two-point correlation functions in redshift space, xi(sigma,pi), for galaxies of different spectral types in the 2dF Galaxy Redshift Survey. Using these corr…
Velocity Fields from IRAS-PSCz survey
E. Branchini, C. S. Frenk L. Teodoro, I. Schmoldt +9
We present a self-consistent nonparametric model of the cosmic velocity field based on the spatial distribution of IRAS galaxies in the recently completed all-sky PSC redshift s…
Cepheids in the Magellanic Clouds
D. L. Welch, C. Alcock, D. P. Bennett +12
In the past few years, the Magellanic Clouds have been the targets for several major variable star surveys. The results of these surveys are now becoming available and it is clear…
Discovery and Characterization of a Caustic Crossing Microlensing Event in the SMC
C. Alcock, R. A. Allsman, D. Alves +21
We present photometric observations and analysis of the second microlensing event detected towards the Small Magellanic Cloud (SMC), MACHO Alert 98-SMC-1. This event was detected e…
The 2dF Galaxy Redshift Survey: The clustering of galaxy groups
Nelson D. Padilla, C. M. Baugh, V. R. Eke +27
We measure the clustering of galaxy groups in the 2dFGRS Percolation-Inferred Galaxy Group (2PIGG) catalogue. The 2PIGG sample has 29,000 groups with at least two members. The clus…
Galaxy groups in the 2dFGRS: the luminous content of the groups
V. R. Eke, C. S. Frenk, C. M. Baugh +25
The 2dFGRS Percolation-Inferred Galaxy Group (2PIGG) catalogue of ~29000 objects is used to study the luminous content of galaxy systems of various sizes. Mock galaxy catalogues co…
Herschel-ATLAS: counterparts from the UV--NIR in the science demonstration phase catalogue
D. J. B. Smith, L. Dunne, S. J. Maddox +45
We present a technique to identify optical counterparts of 250 um-selected sources from the Herschel-ATLAS survey. Of the 6621 250 um > 32 mJy sources in our science demonstration…
Cepheids in the LMC: Results from the MACHO Project
The MACHO Collaboration, D. L. Welch, C. Alcock +19
The approximately 1500 Cepheid variables in 22 LMC fields of the MACHO Project survey have been calibrated and analysed. In this paper, we report improved period ratios for a total…
Galactic Bulge Microlensing Events with Clump Giants as Sources
P. Popowski, C. Alcock, R. A. Allsman +21
We present preliminary results of the analysis of 5 years of MACHO data on the Galactic bulge microlensing events with clump giants as sources. In particular, we discuss: 1) the se…
Spitzer IRAC identification of Herschel-ATLAS SPIRE sources
Sam Kim, Julie L. Wardlow, Asantha Cooray +28
We use spitzer-IRAC data to identify near-infrared counterparts to submillimeter galaxies detected with Herschel-SPIRE at 250um in the Herschel Astrophysical Terahertz Large Area S…
The MACHO Project: Microlensing and Variable Stars
The MACHO Collaboration, K. H. Cook, C. Alcock +18
The MACHO Project monitors millions of stars in the Large Magellanic Cloud, the Small Magellanic Cloud and the bulge of the Milky Way searching for the gravitational microlensing s…
The MACHO Project: Microlensing Results from 5.7 Years of LMC Observations
The MACHO collaboration, C. Alcock, R. A. Allsman +23
We report on our search for microlensing towards the Large Magellanic Cloud (LMC). Analysis of 5.7 years of photometry on 11.9 million stars in the LMC reveals 13 - 17 microlensing…
MeerKAT Observations of Herschel Protocluster Candidates
Y. Ding, D. L. Clements, L. L. Leeuw +9
High-redshift protoclusters consisting of dusty starbursts are thought to play an important role in galaxy evolution. Their dusty nature makes them bright in the FIR/submm but diff…
The MACHO Project LMC Variable Star Inventory IV: Multimode RR Lyrae Stars, Distance to the LMC and Age of the Oldest Stars
C. Alcock, R. A. Allsman, D. Alves +16
We report the discovery of 73 double-mode RR Lyrae (RRd) stars in fields near the bar of the LMC. The stars are detected among the MACHO database of short-period variables that cur…
Microlensing Optical Depth towards the Galactic Bulge Using Clump Giants from the MACHO Survey
P. Popowski, K. Griest, C. L. Thomas +20
Using 7 years of MACHO survey data, we present a new determination of the optical depth to microlensing towards the Galactic bulge. We select the sample of 62 microlensing events (…
The MACHO project: Microlensing Optical Depth towards the Galactic Bulge from Difference Image Analysis
C. Alcock, R. A. Allsman, D. R. Alves +21
We present the microlensing optical depth towards the Galactic bulge based on the detection of 99 events found in our Difference Image Analysis (DIA) survey. This analysis encompas…
Mining the Herschel-ATLAS: submillimeter-selected blazars in equatorial fields
M. López-Caniego, J. González-Nuevo, M. Massardi +29
The Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS) provides an unprecedented opportunity to search for blazars at sub-mm wavelengths. We cross-matched the FIRST radio…
MACHO 96-LMC-2: Lensing of a Binary Source in the LMC and Constraints on the Lensing Object
C. Alcock, R. A. Allsman, D. R. Alves +21
We present photometry and analysis of the microlensing alert MACHO 96-LMC-2. The ~3% photometry provided by the Global Microlensing Alert Network follow--up effort reveals a period…
The Zero Point of Extinction Toward Baade's Window From RR Lyrae Stars
C. Alcock, R. A. Allsman, D. R. Alves +20
We measure the zero point of the Stanek (1996) extinction map by comparing the observed (V-K) colors of 20 RR Lyrae stars (type ab) found in the MACHO survey with their intrinsic (…
Bulge delta Scuti Stars in the MACHO Database
The MACHO Collaboration, C. Alcock, R. A. Allsman +20
We describe the search for delta Scuti stars in the MACHO database of bulge fields. Concentrating on a sample of high amplitude delta Scutis, we examine the light curves and pulsat…
The MACHO Project Hubble Space Telescope Follow-Up: Preliminary Results on the Location of the Large Magellanic Cloud Microlensing Source Stars
C. Alcock, R. A. Allsman, D. R. Alves +21
We attempt to determine whether the MACHO microlensing source stars are drawn from the average population of the LMC or from a population behind the LMC by examining the HST color-…
The MACHO Project First Year LMC Results: The Microlensing Rate and the Nature of the Galactic Dark Halo
C. Alcock, R. A. Allsman, T. S. Axelrod +15
The MACHO collaboration reports on the analysis of our first year LMC data, 9.5 million light curves with an average of 235 observations each. Automated selection procedures give 3…
EXPERIMENTAL LIMITS ON THE DARK MATTER HALO OF THE GALAXY FROM GRAVITATIONAL MICROLENSING.
C. Alcock, R. A. Allsman, T. S. Axelrod +16
We have monitored 8.6 million stars in the Large Magellanic Cloud for 1.1 years and have found 3 events consistent with gravitational microlensing. We place strong constraints on t…
MACHO Project Analysis of the Galactic Bulge Microlensing Events with Clump Giants as Sources
P. Popowski, T. Vandehei, K. Griest +19
We present preliminary results of the analysis of 5 years of MACHO data on the Galactic bulge microlensing events with clump giants as sources. This class of events allows one to o…
Gravitational Microlensing Events Due to Stellar Mass Black Holes
D. P. Bennett, A. C. Becker, J. L. Quinn +28
We present an analysis of the longest timescale microlensing events discovered by the MACHO Collaboration during a 7 year survey of the Galactic bulge. We find 6 events that exhibi…
Difference Image Analysis of Galactic Microlensing II. Microlensing Events
C. Alcock, R. A. Allsman, D. Alves +18
The MACHO collaboration has been carrying out Difference Image Analysis (DIA) since 1996 with the aim of increasing the sensitivity to the detection of gravitational microlensing.…
The MACHO Project Large Magellanic Cloud Variable Star Inventory. XIII. Fourier Parameters for the First Overtone RR Lyrae Variables and the LMC Distance
C. Alcock, D. R. Alves, T. S. Axelrod +21
Fourier coefficents have been derived for the and light curves of 785 overtone RR Lyrae variables in 16 MACHO fields near the bar of the LMC. The and coe…
The VISTA Deep Extragalactic Observations (VIDEO) Survey
Matt J. Jarvis, D. G. Bonfield, V. A. Bruce +25
In this paper we describe the first data release of the the Visible and Infrared Survey Telescope for Astronomy (VISTA) Deep Extragalactic Observations (VIDEO) survey. VIDEO is a ~…
The MACHO Project LMC Variable Star Inventory: Classical Cepheids and AGB Variables
D. Alves, C. Alcock, K. Cook +18
This paper has been withdrawn by the author.
Probable Gravitational Microlensing towards the Galatic Bulge
C. Alcock, R. Allsman, T. Axelrod +13
The MACHO project carries out regular photometric monitoring of millions of stars in the Magellanic Clouds and Galactic Bulge, to search for very rare gravitational microlensing ev…
Galaxy groups in the 2dFGRS: the group-finding algorithm and the 2PIGG catalogue
V. R. Eke, C. M. Baugh, S. Cole +25
The construction of a catalogue of galaxy groups from the 2-degree Field Galaxy Redshift Survey (2dFGRS) is described. Groups are identified by means of a friends-of-friends percol…
The MACHO Project LMC Variable Star Inventory: X. The R Coronae Borealis Stars
C. Alcock, R. A. Allsman, D. R. Alves +26
We report the discovery of eight new R Coronae Borealis (RCB) stars in the Large Magellanic Cloud (LMC) using the MACHO project photometry database. The discovery of these new star…
The Power Spectrum of the PSC Redshift Survey
W. Sutherland, H. Tadros, G. Efstathiou +8
We measure the redshift-space power spectrum P(k) for the recently completed IRAS Point Source Catalogue (PSC) redshift survey, which contains 14500 galaxies over 84% of the sky wi…
The MACHO Project: Microlensing Detection Efficiency
The MACHO collaboration, C. Alcock, R. A. Allsman +22
The MACHO project is a search for dark matter in the form of massive compact halo objects (MACHOs). The project has photometrically monitored tens of millions of stars in the Large…
The Blazhko Effect in RR Lyrae stars: Strong observational support for the oblique pulsator model in three stars
The MACHO Collaboration, C. Alcock, D. R. Alves +17
Using the novel data set of the MACHO project, we show that three ``Blazhko Effect'' RR Lyrae stars show nearly-pure amplitude modulation of a single pulsation mode. This is strong…
The 2dF Galaxy Redshift Survey: constraints on cosmic star-formation history from the cosmic spectrum
I. K. Baldry, K. Glazebrook, C. M. Baugh +25
We present the first results on the history of star formation in the Universe based on the `cosmic spectrum', in particular, the volume-averaged, luminosity-weighted, stellar absor…
Variable Stars in the MACHO Collaboration Database
K. H. Cook, C. Alcock, R. A. Allsman +13
The MACHO Collaboration's search for baryonic dark matter via its gravitational microlensing signature has generated a massive database of time ordered photometry of millions of st…
The Herschel ATLAS
S. Eales, L. Dunne, D. Clements +94
The Herschel ATLAS is the largest open-time key project that will be carried out on the Herschel Space Observatory. It will survey 510 square degrees of the extragalactic sky, four…
The 2dF Galaxy Redshift Survey: voids and hierarchical scaling models
D. J. Croton, M. Colless, E. Gaztanaga +26
We measure the redshift space reduced void probability function (VPF) for 2dFGRS volume limited galaxy samples covering the absolute magnitude range M_bJ-5logh=-18 to -22. Theoreti…
The 2dF Galaxy Redshift Survey: Hierarchical galaxy clustering
C. M. Baugh, D. J. Croton, E. Gaztanaga +26
We use the two-degree field Galaxy Redshift Survey (2dFGRS) to test the hierarchical scaling hypothesis: namely, that the -point galaxy correlation functions can be written in t…
The MACHO Project 2nd Year LMC Microlensing Results and Dark Matter Implications
M. R. Pratt, C. Alcock, R. A. Allsman +16
The MACHO Project is searching for galactic dark matter in the form of massive compact halo objects (Machos). Millions of stars in the Large Magellanic Cloud (LMC), Small Magellani…
The 2dF Galaxy Redshift Survey: Luminosity dependence of galaxy clustering
P. Norberg, C. M. Baugh, E. Hawkins +23
We investigate the dependence of the strength of galaxy clustering on intrinsic luminosity using the Anglo-Australian two degree field galaxy redshift survey (2dFGRS). The 2dFGRS i…
A Non Parametric Model for the Cosmic Velocity Field
E. Branchini, L. Teodoro, C. S. Frenk +10
We present a self consistent nonparametric model of the local cosmic velocity field based on the density distribution in the PSCz redshift survey of IRAS galaxies. The error analys…
First Observation of Parallax in a Gravitational Microlensing Event
C. Alcock, R. A. Allsman, D. Alves +14
We present the first detection of parallax effects in a gravitational microlensing event. Parallax in a gravitational microlensing event observed only from the Earth appears as a d…
The MACHO Project LMC Variable Star Inventory: III. New R Coronae Borealis Stars
C. Alcock, R. A. Allsman, D. R. Alves +18
We report the discovery of two new R Coronae Borealis (RCB) stars in the Large Magellanic Cloud (LMC) using the MACHO project photometry database. The identification of both stars…
Gravitational Microlensing Results from MACHO
The MACHO Collaboration, W. Sutherland, C. Alcock +17
The MACHO project is searching for dark matter in the form of massive compact halo objects (Machos), by monitoring the brightness of millions of stars in the Magellanic Clouds to s…
A Binary Lensing Event Toward the LMC: Observations and Dark Matter Implications
D. P. Bennett, C. Alcock, R. A. Allsman +18
The MACHO collaboration has recently analyzed 2.1 years of photometric data for about 8.5 million stars in the Large Magellanic Cloud (LMC). This analysis has revealed 8 candidate…
The 2dF Galaxy Redshift Survey: The population of nearby radio galaxies at the 1 mJy level
M. Magliocchetti, S. J. Maddox, C. A. Jackson +21
We use redshift determinations and spectral analysis of galaxies in the 2dF Galaxy Redshift Survey to study the properties of local radio sources with mJy. 557 objects dra…
The 2dF Galaxy Redshift Survey: higher order galaxy correlation functions
D. J. Croton, E. Gaztanaga, C. M. Baugh +26
We measure moments of the galaxy count probability distribution function in the two-degree field galaxy redshift survey (2dFGRS). The survey is divided into volume limited subsampl…
Galaxy and Mass Assembly (GAMA): Dust obscuration in galaxies and their recent star formation histories
D. B. Wijesinghe, A. M. Hopkins, R. Sharp +32
We present self-consistent star formation rates derived through pan-spectral analysis of galaxies drawn from the Galaxy and Mass Assembly (GAMA) survey. We determine the most appro…