GASKAP -- The Galactic ASKAP Survey

Abstract

A survey of the Milky Way disk and the Magellanic System at the wavelengths of the 21-cm atomic hydrogen (HI) line and three 18-cm lines of the OH molecule will be carried out with the Australian Square Kilometre Array Pathfinder telescope. The survey will study the distribution of HI emission and absorption with unprecedented angular and velocity resolution, as well as molecular line thermal emission, absorption, and maser lines. The area to be covered includes the Galactic plane (|b|< 10deg) at all declinations south of delta = +40deg, spanning longitudes 167deg through 360deg to 79deg at b=0deg, plus the entire area of the Magellanic Stream and Clouds, a total of 13,020 square degrees. The brightness temperature sensitivity will be very good, typically sigma_T ~ 1 K at resolution 30arcsec and 1 km/s. The survey has a wide spectrum of scientific goals, from studies of galaxy evolution to star formation, with particular contributions to understanding stellar wind kinematics, the thermal phases of the interstellar medium, the interaction between gas in the disk and halo, and the dynamical and thermal states of gas at various positions along the Magellanic Stream.

45 pages, 8 figures, Pub. Astron. Soc. Australia (in press)

References in corpus (34)

• Trigonometric Parallaxes of Massive Star Forming Regions: VI. Galactic Structure, Fundamental Parameters and Non-Circular Motions
• The VLA Galactic Plane Survey
• Molecular Cloud Evolution II. From cloud formation to the early stages of star formation in decaying conditions
• Ultraviolet Survey of CO and H_2 in Diffuse Molecular Clouds: The Reflection of Two Photochemistry Regimes in Abundance Relationships
• The Origin of the Magellanic Stream and Its Leading Arm
• Science With The Australian Square Kilometre Array Pathfinder
• Cooling, Gravity and Geometry: Flow-driven Massive Core Formation
• Resolution of the Distance Ambiguity for Galactic HII Regions
• The 6-GHz Multibeam Maser Survey I. Techniques
• A test suite for quantitative comparison of hydrodynamics codes in astrophysics
• MASH-II: More Planetary Nebulae from the AAO/UKST HαSurvey
• The Source of Ionization along the Magellanic Stream
• The Magellanic Bridge: The Nearest Purely Tidal Stellar Population
• Geometrically Derived Timescales for Star Formation in Spiral Galaxies
• Smith's Cloud: A High-velocity Cloud Colliding with the Milky Way
• The Transition from Atomic to Molecular Hydrogen in Interstellar Clouds: 21cm Signature of the Evolution of Cold Atomic Hydrogen in Dense Clouds
• Multi-Scale CLEAN: A comparison of its performance against classical CLEAN in galaxies using THINGS
• First results from the Arecibo Galactic HI Survey: the disk/halo interface region in the outer Galaxy
• The many streams of the Magellanic Stream
• Reconstructing Deconstruction: High-Velocity Cloud Distance Through Disruption Morphology
• Ionized Gas in the Smith Cloud
• Galactic Spiral Shocks with Thermal Instability
• VERA 22 GHz fringe search survey
• Discovery of an HI Counterpart to the Extended Tail of Mira
• The Dust-to-Gas Ratio in the Small Magellanic Cloud Tail
• Properties and Origin of the High-Velocity Gas Toward the Large Magellanic Cloud
• Investigating high-mass star formation through maser surveys
• An Improved Technique for Measurement of Cold HI in Molecular Cloud Cores
• The formation of a detached shell around the carbon star Y CVn
• OH maser disc and outflow in the Orion-BN/KL region
• HI Clouds in the Lower Halo: I. The Galactic All-Sky Survey Pilot Region
• The scattered debris of the Magellanic Stream
• Evolution of Unmagnetized and Magnetized Shear Layers
• Faint HI 21-cm Emission Line Wings at Forbidden-Velocities

Cited by in corpus (61)

• WALLABY -- An SKA Pathfinder HI Survey
• The wind speeds, dust content, and mass-loss rates of evolved AGB and RSG stars at varying metallicity
• The 21-SPONGE HI Absorption Line Survey II: The temperature of Galactic HI
• CCAT-prime Collaboration: Science Goals and Forecasts with Prime-Cam on the Fred Young Submillimeter Telescope
• The 21-SPONGE HI Absorption Survey I: Techniques and Initial Results
• The Physical Nature of Neutral Hydrogen Intensity Structure
• The HI/OH/Recombination line survey of the inner Milky Way (THOR): data release 2 and HI overview
• The MPIfR-MeerKAT Galactic Plane survey I -- System setup and early results
• The HI/OH/Recombination line survey of the inner Milky Way (THOR)
• Shock-multicloud interactions in galactic outflows -- II. Radiative fractal clouds and cold gas thermodynamics
• Atomic and Ionized Microstructures in the Diffuse Interstellar Medium
• SPLASH: The Southern Parkes Large-Area Survey in Hydroxyl - First Science from the Pilot Region
• The Mopra Southern Galactic Plane CO Survey - Data Release 3
• Illuminating the past 8 billion years of cold gas towards two gravitationally lensed quasars
• A database of circumstellar OH masers
• Extracting the cold neutral medium from HI emission with deep learning: Implications for Galactic foregrounds at high latitude
• Science with the Murchison Widefield Array: Phase I Results and Phase II Opportunities
• The Global Magneto-Ionic Medium Survey: Polarimetry of the Southern Sky from 300 to 480 MHz
• The ASKAP-EMU Early Science Project: 888 MHz Radio Continuum Survey of the Large Magellanic Cloud
• Recovering interstellar gas properties with HI spectral lines: A comparison between synthetic spectra and 21-SPONGE
• Polycyclic Aromatic Hydrocarbons, the Anomalous Microwave Emission, and Their Connection to the Cold Neutral Medium
• The ASKAP-EMU Early Science Project:Radio Continuum Survey of the Small Magellanic Cloud
• The Galactic Census of High- and Medium-mass Protostars. IV. Molecular Clump Radiative Transfer, Mass Distributions, Kinematics, and Dynamical Evolution
• New candidate radio supernova remnants detected in the GLEAM survey over $345^{\circ }<l<60^{\circ }$, $180^{\circ }<l<240^{\circ }$
• Calibrating the HISA temperature: Measuring the temperature of the Riegel-Crutcher cloud
• The Life Cycle of the Central Molecular Zone. II: Distribution of atomic and molecular gas tracers
• Better Together: The Complex Interplay Between Radiative Cooling and Magnetic Draping
• First extragalactic measurement of the turbulence driving parameter: ALMA observations of the star-forming region N159E in the Large Magellanic Cloud
• GASKAP Pilot Survey Science II: ASKAP Zoom Observations of Galactic 21-cm Absorption
• BICEP / Keck XVI: Characterizing Dust Polarization through Correlations with Neutral Hydrogen
• A dearth of OH/IR stars in the Small Magellanic Cloud
• The Structure of Dark Molecular Gas in the Galaxy -- II. Physical State of "CO-Dark" Gas in the Perseus Arm
• Parkes full polarization spectra of OH masers - II. Galactic longitudes 240 to 350
• Spatial variations of turbulent properties of neutral hydrogen gas in the Small Magellanic Cloud using structure function analysis
• Probing the cold neutral medium through HI emission morphology with the scattering transform
• SPLASH: The Southern Parkes Large-Area Survey in Hydroxyl -- Data Description & Release
• Towards a three-dimensional distribution of the molecular clouds in the Galactic Centre
• Peering into the Milky Way by FAST: I. Exquisite HI structures in the inner Galactic disk from the piggyback line observations of the FAST GPPS survey
• The hydroxyl satellite-line `flip' as a tracer of expanding HII regions
• A new approach for short-spacing correction of radio interferometric data sets
• The Karl G. Jansky Very Large Array Local Group L-band Survey (LGLBS)
• Atacama Large Aperture Submillimeter Telescope (AtLAST) Science: Our Galaxy
• Filamentary Dust Polarization and the Morphology of Neutral Hydrogen Structures
• The Column Density Variance in Turbulent Interstellar Media: A Fractal Model Approach
• Commissioning the HI Observing Mode of the Beamformer for the Cryogenically Cooled Focal L-band Array for the GBT (FLAG)
• Cold HI ejected into the Magellanic Stream
• HI filaments as potential compass needles? Comparing the magnetic field structure of the Small Magellanic Cloud to the orientation of GASKAP-HI filaments
• The influence of magnetic field on the CNM mass fraction and its alignment with density structures
• Astrophysical constraints on the proton-to-electron mass ratio with FAST
• The application of MultiView Methods for High Precision Astrometric Space VLBI at Low Frequencies
• A Low Frequency Pilot Survey of Southern HII Regions in the Vela Constellation
• AMOEBA: Automated Molecular Excitation Bayesian Line-Fitting Algorithm
• Small-scale structure traced by neutral hydrogen absorption in the direction of multiple-component radio continuum sources
• The FAST HI 21-cm absorption blind survey. II. -- Statistic Exploration for Associated and Intervening systems
• The MeerKAT Absorption Line Survey (MALS) data release 3: Cold atomic gas associated with the Milky Way
• History of Astronomy in Australia: Big-Impact Astronomy from World War II until the Lunar Landing (1945-1969)
• Considerations with stacking absorption spectra: cold HI gas in cirrus region of the Milky Way
• Modelling the Gamma-Ray Morphology of HESS J1804-216 from Two Supernova Remnants in a Hadronic Scenario
• Exploring the pattern of the Galactic HI foreground of GRBs with the ATCA
• Processing of GASKAP-HI pilot survey data using a commercial supercomputer
• The MACH HI absorption survey I: Physical conditions of cold atomic gas outside of the Galactic plane