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A Catalogue of Field Horizontal Branch Stars Aligned with High Velocity Clouds | Christopher Thom
; Brad K. Gibson
; Norbert Christlieb
; | Date: |
27 Jun 2005 | Subject: | astro-ph | Affiliation: | Swinburne), Brad K. Gibson (Swinburne) and Norbert Christlieb (Hamburger Sternwarte | 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. | Source: | arXiv, astro-ph/0506633 | Services: | Forum | Review | PDF | Favorites |
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