A5040488268- Gamma-ray bursts and supernovae
- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Stellar, planetary, and galactic studies
- Astrophysics and Cosmic Phenomena
- Astronomical Observations and Instrumentation
- Astrophysical Phenomena and Observations
- Astrophysics and Star Formation Studies
- Pulsars and Gravitational Waves Research
- Nuclear Physics and Applications
- CCD and CMOS Imaging Sensors
- History and Developments in Astronomy
- Geological and Geophysical Studies
- Adaptive optics and wavefront sensing
- Remote Sensing in Agriculture
- Research Data Management Practices
- Calibration and Measurement Techniques
- Astro and Planetary Science
- Big Data and Business Intelligence
- Advanced Statistical Methods and Models
- Spacecraft and Cryogenic Technologies
- Scientific Computing and Data Management
- Laser Design and Applications
- Geophysics and Gravity Measurements
- Distributed and Parallel Computing Systems
Vera C. Rubin Observatory
2020
Large Synoptic Survey Telescope Corporation
2018-2019
Australian Astronomical Observatory
2011-2017
Netherlands Institute for Radio Astronomy
2013
University of Nottingham
2010-2012
American Association of Orthodontists
2011
The University of Texas at Austin
2003-2008
Gemini South Observatory
2008
University of Chicago
2003
Fermi National Accelerator Laboratory
2002
(Abridged) We describe here the most ambitious survey currently planned in optical, Large Synoptic Survey Telescope (LSST). A vast array of science will be enabled by a single wide-deep-fast sky survey, and LSST have unique capability faint time domain. The design is driven four main themes: probing dark energy matter, taking an inventory Solar System, exploring transient optical sky, mapping Milky Way. wide-field ground-based system sited at Cerro Pach\'{o}n northern Chile. telescope 8.4 m...
The Sloan Digital Sky Survey (SDSS) is an imaging and spectroscopic survey that will eventually cover approximately one-quarter of the celestial sphere collect spectra ≈106 galaxies, 100,000 quasars, 30,000 stars, serendipity targets. In 2001 June, SDSS released to general astronomical community its early data release, roughly 462 deg2 including almost 14 million detected objects 54,008 follow-up spectra. were collected in drift-scan mode five bandpasses (u, g, r, i, z); our 95% completeness...
We have created a variety of composite quasar spectra using homogeneous data set over 2200 from the Sloan Digital Sky Survey (SDSS). The sample spans redshift range 0.044 ≤ z 4.789 and an absolute r' magnitude -18.0 to -26.5. input cover observed wavelength 3800–9200 Å at resolution 1800. median covers rest-wavelength 800 8555 reaches peak signal-to-noise ratio 300 per 1 element in rest frame. identified 80 emission-line features spectrum. Emission-line shifts relative nominal laboratory...
We demonstrate a novel technology that combines the power of multi-object spectrograph with spatial multiplex advantage an integral field (IFS). The Sydney-AAO Multi-object IFS (SAMI) is prototype wide-field system at Anglo-Australian Telescope (AAT) allows 13 imaging fibre bundles ("hexabundles") to be deployed over 1-degree diameter view. Each hexabundle comprises 61 lightly-fused multimode fibres reduced cladding and yields 75 percent filling factor. core subtends 1.6 arcseconds on sky...
The Galaxy And Mass Assembly (GAMA) survey is one of the largest contemporary spectroscopic surveys low redshift galaxies. Covering an area ∼286 deg2 (split among five regions) down to a limiting magnitude r < 19.8 mag, we have collected spectra and reliable redshifts for 238 000 objects using AAOmega spectrograph on Anglo-Australian Telescope. In addition, assembled imaging data from number independent in order generate photometry spanning wavelength range 1 nm–1 m. Here, report recently...
The SAMI Galaxy Survey will observe 3400 galaxies with the Sydney-AAO Multi-object Integral-field spectrograph (SAMI) on Anglo-Australian Telescope (AAT) in a 3-year survey which began 2013. We present throughput of system, science basis and specifications for target selection, observation plan combined properties selected galaxies. includes four volume limited galaxy samples based cuts proxy stellar mass, along low-stellar mass dwarf all from And Mass Assembly (GAMA) survey. GAMA regions...
In Galaxy And Mass Assembly Data Release 4 (GAMA DR4), we make available our full spectroscopic redshift sample. This includes 248682 galaxy spectra, and, in combination with earlier surveys, results 330542 redshifts across five sky regions covering ~250deg^2. The density, is the highest over such a sustained area, has exceptionally high completeness (95 per cent to r_KIDS=19.65mag), and well suited for study of mergers, groups, low (z<0.25) population. DR4 32 value-added tables or...
The Sloan Digital Sky Survey has confirmed the existence of populations broad absorption line (BAL) quasars with various unusual properties. We present and discuss twenty-three such objects consider implications their wide range properties for models BAL outflows in general. have discovered one quasar a record number lines. Two other similarly complex many narrow troughs show MgII extending longward systemic host galaxy redshifts. This can be explained as an extended continuum source by...
The Galaxy And Mass Assembly (GAMA) survey is a multiwavelength photometric and spectroscopic survey, using the AAOmega spectrograph on Anglo-Australian Telescope to obtain spectra for up ∼300 000 galaxies over 280 deg2, limiting magnitude of rpet < 19.8 mag. target are distributed 0 z ≲ 0.5 with median redshift ≈ 0.2, although distribution includes small number systems, primarily quasars, at higher redshifts, beyond = 1. accuracy ranges from σv 50 km s−1 100 depending signal-to-noise ratio...
We investigate the total major (>1:4 by stellar mass) and minor (>1:100 merger history of a population 80 massive (M* > 1011 M☉) galaxies at high redshifts (z = 1.7–3). utilize extremely deep high-resolution Hubble Space Telescope H-band imaging from GOODS NICMOS Survey, which corresponds to rest-frame optical wavelengths probed. find that are often morphologically disturbed, with CAS (concentration, C; asymmetry, A; clumpiness, S) deduced fraction fm 0.23 ± 0.05 z 1.7–3. close accord...
We present the Galaxy And Mass Assembly (GAMA) Panchromatic Data Release (PDR) constituting over 230 deg2 of imaging with photometry in 21 bands extending from far-UV to far-IR. These data complement our spectroscopic campaign 300k galaxies, and are compiled observations a variety facilities including: GALaxy Evolution eXplorer, Sloan Digital Sky Survey, Visible Infrared Telescope for Astronomy (VISTA), Wide-field Survey Explorer, Herschel, GAMA regions currently being surveyed by VLT (VST)...
We present the Lambda Adaptive Multi-Band Deblending Algorithm in R (LAMBDAR), a novel code for calculating matched aperture photometry across images that are neither pixel- nor PSF-matched, using prior definitions derived from high resolution optical imaging. The development of this program is motivated by desire consistent and uncertainties large ranges photometric imaging, use spectral energy distributions. describe program, specifically key features required robust determination...
We present the Early Data Release of Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey. The SAMI Survey is an ongoing integral spectroscopic survey ~3400 low-redshift (z<0.12) galaxies, covering galaxies in and groups within And Mass Assembly (GAMA) regions, a sample clusters. In Release, we publicly release fully calibrated datacubes for representative selection 107 drawn from GAMA along with information about these catalogues. All can be downloaded individually or as...
The Galaxy And Mass Assembly (GAMA) survey furnishes a deep redshift catalog that, when combined with the Wide-field Infrared Explorer ($WISE$), allows us to explore for first time mid-infrared properties of $> 110, 000$ galaxies over 120 deg$^2$ $z\simeq 0.5$. In this paper we detail procedure producing matched GAMA-$WISE$ G12 and G15 fields, in particular characterising measuring resolved sources; complete catalogs all three GAMA equatorial fields will be made available through public...
We use a highly complete subset of the Galaxy And Mass Assembly II (GAMA-II) redshift sample to fully describe stellar mass dependence close pairs and mergers between 108 1012 M⊙. Using analytic form this fit we investigate total accreting on more massive galaxies across all ratios. Depending how conservatively select our robust merging systems, fraction companions is 2.0–5.6 per cent. GAMA-II data see no significant evidence for change in pair z = 0.05 0.2. However, find systematically...
The Galaxy And Mass Assembly (GAMA) survey has obtained spectra of over 230 000 targets using the Anglo-Australian Telescope. To homogenize redshift measurements and improve reliability, a fully automatic code was developed (autoz). were made cross-correlation method for both absorption- emission-line spectra. Large deviations in high-pass-filtered are partially clipped order to be robust against uncorrected artefacts reduce weight given single-line matches. A single figure merit (FOM) that...
We present an estimate of the galaxy stellar mass function and its division by morphological type in local (0.025 < z 0.06) Universe. Adopting robust classifications as previously presented (Kelvin et al.) for a sample 3,727 galaxies taken from Galaxy And Mass Assembly survey, we define volume limited sub-sample 2,711 to lower limit M = 10^9.0 M_sun. confirm that is well described double Schechter given M* 10^10.64 M_sun, {\alpha}1 -0.43, {\phi}*1 4.18 dex^-1 Mpc^-3, {\alpha}2 -1.50 {\phi}*2...
We describe the selection of galaxies targeted in eight low-redshift clusters (APMCC0917, A168, A4038, EDCC442, A3880, A2399, A119 and A85; 0.029 < z 0.058) as part Sydney-AAO Multi-Object Integral field spectrograph Galaxy Survey (SAMI-GS). have conducted a redshift survey these using AAOmega multi-object on 3.9-m Anglo-Australian Telescope. The is used to determine cluster membership characterize dynamical properties clusters. In combination with existing data, resulted 21 257 reliable...
We present the first edition of Sloan Digital Sky Survey (SDSS) Quasar Catalog. The catalog consists 3814 objects (3000 discovered by SDSS) in initial SDSS public data release that have at least one emission line with a full width half maximum larger than 1000 km/s, luminosities brighter M_i^* = -23, and highly reliable redshifts. area covered is 494 square degrees; majority were found commissioning using multicolor selection technique. quasar redshifts range from 0.15 to 5.03. For each...
We present a study to determine how star formation contributes galaxy growth since z = 1.5 over five decades in stellar mass. investigate the specific rate (SSFR; [SFR] per unit mass) as function of mass and redshift. A sample 175 K-band-selected galaxies from MUnich Near-Infrared Cluster Survey spectroscopic data set provides intermediate- high-mass (mostly M* ≥ 1010 M☉) 1. The FORS Deep Field 168 low-mass ≤ 1.5. use Sloan Digital Sky test compatibility our results with drawn larger volume....
Recent independent results from numerical simulations and observations have shown that brightest cluster galaxies (BCGs) increased their stellar mass by a factor of almost two between z~0.9 z~0.2. The further suggest more than half this is accreted through major mergers. Using sample 18 distant galaxy clusters with over 600 spectroscopically confirmed members them, we search for observational evidence mergers do play significant role. We find merger rate 0.38 +/- 0.14 per Gyr at z~1. While...
We present evidence for stochastic star formation histories in low-mass (M* < 1010 M⊙) galaxies from observations within the Galaxy And Mass Assembly (GAMA) survey. For ∼73 000 between 0.05 z 0.32, we calculate rates (SFR) and specific (SSFR = SFR/M*) spectroscopic Hα measurements apply dust corrections derived Balmer decrements. find a dependence of SSFR on stellar mass, such that SSFRs decrease with increasing mass star-forming galaxies, full sample, as stronger function mass. use simple...
From a volume-limited sample of 45 542 galaxies and 6000 groups with z ≤ 0.213, we use an adapted minimal spanning tree algorithm to identify classify large-scale structures within the Galaxy And Mass Assembly (GAMA) survey. Using galaxy groups, 643 filaments across three equatorial GAMA fields that span up 200 h−1 Mpc in length, each average eight them. By analysing not belonging secondary population smaller coherent composed entirely galaxies, dubbed 'tendrils' appear link together, or...
We investigate the relationship between colour and structure within galaxies using a large, volume-limited sample of bright, low-redshift with optical to near-infrared imaging from GAMA survey. fit single-component, wavelength-dependent, elliptical Sersic models all passbands simultaneously, software developed by MegaMorph project. Dividing our index colour, recovered wavelength variations in effective radius (R_e) (n) reveal internal structure, hence formation history, different types...
We present a detailed investigation into the effects of galaxy environment on their star formation rates (SFRs) using galaxies observed in Galaxy And Mass Assembly (GAMA) survey. use three independent volume-limited samples within z < 0.2 and Mr −17.8. investigate known SFR–density relationship explore detail dependence SFR stellar mass density. show that trend is only visible when we include passive population along with star-forming population. This relation absent consider galaxies,...