A Catalogue of Field Horizontal Branch Stars Aligned with High Velocity Clouds
arXiv:astro-ph/0506633 · doi:10.1086/444414
Abstract
We present a catalogue of 430 Field Horizontal Branch (FHB) stars, selected from the Hamburg/ESO Survey (HES), which fortuitously align with high column density neutral hydrogen (HI) High-Velocity Cloud (HVC) gas. These stars are ideal candidates for absorption-line studies of HVCs, attempts at which have been made for almost 40 years with little success. A parent sample of 8321 HES FHB stars was used to extract HI spectra along each line-of-sight, using the HI Parkes All-Sky Survey. All lines-of-sight aligned with high velocity HI emission with peak brightness temperatures greater than 120mK were examined. The HI spectra of these 430 probes were visually screened and cross-referenced with several HVC catalogues. In a forthcoming paper, we report on the results of high-resolution spectroscopic observations of a sample of stars drawn from this catalogue.
7 pages, 4 figures. ApJS accepted. Full catalogue and all online-only images available at http://astronomy.swin.edu.au/staff/cthom/catalogue/index.html
References in corpus (8)
- Highly-Ionized High-Velocity Gas in the Vicinity of the Galaxy
- The Magellanic Stream, High-Velocity Clouds and the Sculptor Group
- On the Continuing Formation of the Andromeda Galaxy: Detection of HI Clouds in the M31 Halo
- An all-sky study of compact, isolated high-velocity clouds
- Deriving the Metallicity Distribution Function of Galactic Systems
- Where are the High Velocity Clouds in Local Group Analogs?
- The stellar content of the Hamburg/ESO survey. III. Field horizontal-branch stars in the Galaxy
- CaII K interstellar observations towards early disc and halostars - Paper II; distances to IVCs and HVCs