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
        • Research publications
        • View Item
        • UHRA Home
        • University of Hertfordshire
        • Research publications
        • View Item

        H I asymmetries in the isolated galaxy CIG 292

        View/Open
        Final Accepted Version (PDF, 2Mb)
        Author
        Portas, Antonio
        Scott, Tom C.
        Brinks, E.
        Bosma, Albert
        Verdes-Montenegro, Lourdes
        Heesen, V.
        Espada, Daniel
        Verley, Simon
        Sulentic, Jack
        Sengupta, Chandreyee
        Athanassoula, E.
        Yun, Min
        Attention
        2299/6484
        Abstract
        We present Expanded Very Large Array (EVLA) D-array observations of the 21 cm line of neutral hydrogen (H-I) of CIG 292, an isolated SA(s)b galaxy at a distance of similar to 24.3 Mpc. From previous Hi single dish observations the galaxy was known to have a mildly asymmetric H-I profile (A(flux) = 1.23 +/- 0.3). Our EVLA observations show there is similar to 12% more Hi projected south of the optical center (approaching velocities) than in the north (receding velocities), despite the H-I extending similar to 16% further to the north than the south. The Hi projected within the optical disk must have been perturbed within the Hi relaxation time (similar to 10(8) yr) which implies that this cannot have been caused by any of the three nearest companions, as their distance (similar to 0.5 Mpc) is too large. Neither Hi-rich companions nor tidal tails were found within our field of view and velocity range covered. Our kinematical data suggest that the inner part harbors an oval distortion whereas the outer regions show signs of a modest warp. The mild asymmetry in the Hi global profile thus actually masks stronger asymmetries in the two-dimensional distributions of gas and star-forming regions in this galaxy. Since the galaxy is isolated, this must predominantly be due to processes related to its formation and secular evolution.
        Publication date
        2011-09-20
        Published in
        Astrophysical Journal Letters
        Published version
        https://doi.org/10.1088/2041-8205/739/1/L27
        Other links
        http://hdl.handle.net/2299/6484
        Relations
        School of Physics, Astronomy and Mathematics
        Metadata
        Show full item record

        Related items

        Showing items related by title, author, creator and subject.

        • The H alpha galaxy survey. I. The galaxy sample, H alpha narrow-band observations and star formation parameters for 334 galaxies 

          James, P.A.; Shane, N.S.; Beckman, J.E.; Cardwell, A.; Collins, C.A.; Etherton, J.; de Jong, R.S.; Fathi, K.; Knapen, J.; Peletier, R.F.; Percival, S.M.; Pollacco, D.L.; Seigar, M.S.; Stedman, S. (2004)
          We discuss the selection and observations of a large sample of nearby galaxies, which we are using to quantify the star formation activity in the local Universe. The sample consists of 334 galaxies across all Hubble types ...
        • Galaxy evolution in Abell 85. I: Cluster substructure and environmental effects on the blue galaxy population 

          Bravo-Alfaro, H.; Caretta, C.A.; Lobo, C.; Durret, F.; Scott, T.C. (2009)
        • Circumnuclear regions in barred spiral galaxies - II. Relations to host galaxies 

          Knapen, J.; Perez-Ramirez, D.; Laine, S. (2002-12)
        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