A5027654221- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Astronomy and Astrophysical Research
- Astrophysical Phenomena and Observations
- Galaxies: Formation, Evolution, Phenomena
- Astronomical Observations and Instrumentation
- Gamma-ray bursts and supernovae
University of Hertfordshire
2017-2023
The INT Galactic Plane Survey (IGAPS) is the merger of optical photometric surveys, IPHAS and UVEX, based on data from Isaac Newton Telescope (INT) obtained between 2003 2018. Here, we present IGAPS point source catalogue. It contains 295.4 million rows providing photometry in filters, i, r, narrow-band Halpha, g U_RGO. footprint fills coordinate range, |b| < 5deg 30deg l 215deg. A uniform calibration, referred to Pan-STARRS system, applied g, r while Halpha calibration linked then...
Previous studies of the rotation law in outer Galactic disc have mainly used gas tracers or clump giants. Here, we explore A and F stars as alternatives: these provide a much denser sampling than experienced significantly less velocity scattering older This first investigation confirms suitability this role. Our work is based on spectroscopy ∼1300 photometrically selected red calcium-triplet region, chosen to mitigate against effects interstellar extinction. The are located two low latitude...
A and F stars can be used as probes of outer Galactic disc kinematics: here we extend the work Harris et al. by cross-matching their A/F sample with Gaia DR2 to bring in proper motions. These are combined already measured radial velocities spectrophotometric distances obtain full space We use this 1173 stars, located two pencil-beam sightlines (ℓ = 178° ℓ 118°), Galactocentric velocity field out almost RG 15 kpc. find there significant differences all three (radial, azimuthal, vertical)...