University of Hertfordshire Research Archive

        JavaScript is disabled for your browser. Some features of this site may not work without it.

        Browse

        All of UHRABy Issue DateAuthorsTitlesThis CollectionBy Issue DateAuthorsTitles

        Arkivum Files

        My Downloads
        View Item 
        • UHRA Home
        • University of Hertfordshire
        • Masters Theses
        • View Item
        • UHRA Home
        • University of Hertfordshire
        • Masters Theses
        • View Item

        Searching for Ha-Selected Planetary Nebulae in the UWISH2 Galactic Plane Molecular Hydrogen Survey

        View/Open
        Download fulltext (PDF, 225Mb)
        Author
        Ferry, Thomas
        Attention
        2299/15306
        Abstract
        This thesis seeks to analyse and quantify the differences present in 2 different emission mechanisms seen in Planetary Nebulae (PN). These are H emission from recombination of ionised hydrogen and H2 emission from photoexcitation of molecular hydrogen gas. Firstly, I have gathered images from the UKIRT Widefield Infrared Survey for H2 (UWISH2), which correspond to PN in the Macquarie/AAO/Strasbourg H (MASH) Planetary Nebula Galactic Cataloge, which have been compared and contrasted, and the full extent of which will be featured in the appendices of this report. Secondly, I have gathered images from the UWISH2, which correspond to PN found in the INT/WFC Photometric H Survey (IPHAS) of the Northern Galactic plane by Viironen et al. 2009, which have been compared and contrasted and will be featured in the appendices of this report. The results gained from this work challenge the assumption of Gatley's Rule that molecular hydrogen is a predictor for bipolar emission in PN with more than half of the PN in the MASH sample showing such emission, and approximately 80% of the PN in the IPHAS sample as well. This work has shown that H2 emission is a good method of searching for PN and may further be used as a tool to further confirm objects as true PN.
        Publication date
        2014-12-18
        Published version
        https://doi.org/10.18745/th.15306
        Other links
        http://hdl.handle.net/2299/15306
        Metadata
        Show full item record
        Keep in touch

        © 2019 University of Hertfordshire

        I want to...

        • Apply for a course
        • Download a Prospectus
        • Find a job at the University
        • Make a complaint
        • Contact the Press Office

        Go to...

        • Accommodation booking
        • Your student record
        • Bayfordbury
        • KASPAR
        • UH Arts

        The small print

        • Terms of use
        • Privacy and cookies
        • Criminal Finances Act 2017
        • Modern Slavery Act 2015
        • Sitemap

        Find/Contact us

        • T: +44 (0)1707 284000
        • E: ask@herts.ac.uk
        • Where to find us
        • Parking
        • hr
        • qaa
        • stonewall
        • AMBA
        • ECU Race Charter
        • disability confident
        • AthenaSwan