Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    Multiwavelength scrutiny of X-ray sources in dwarf galaxies: ULXs versus AGNs

    96203.pdf (901.6Kb)
    Access Status
    Open access
    Authors
    Thygesen, E.
    Plotkin, R.M.
    Soria, R.
    Reines, A.E.
    Greene, J.E.
    Anderson, Gemma
    Baldassare, V.F.
    Owens, M.G.
    Urquhart, R.T.
    Gallo, E.
    Miller-Jones, James
    Paul, J.D.
    Rollings, A.P.
    Date
    2023
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Thygesen, E. and Plotkin, R.M. and Soria, R. and Reines, A.E. and Greene, J.E. and Anderson, G.E. and Baldassare, V.F. et al. 2023. Multiwavelength scrutiny of X-ray sources in dwarf galaxies: ULXs versus AGNs. Monthly Notices of the Royal Astronomical Society. 519 (4): pp. 5848-5858.
    Source Title
    Monthly Notices of the Royal Astronomical Society
    DOI
    10.1093/mnras/stad002
    ISSN
    0035-8711
    Faculty
    Faculty of Science and Engineering
    School
    School of Elec Eng, Comp and Math Sci (EECMS)
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/DE180100346
    Remarks

    This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2023 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

    URI
    http://hdl.handle.net/20.500.11937/96439
    Collection
    • Curtin Research Publications
    Abstract

    Owing to their quiet evolutionary histories, nearby dwarf galaxies (stellar masses M∗ ≲ 3 × 109 M⊙) have the potential to teach us about the mechanism(s) that 'seeded' the growth of supermassive black holes, and also how the first stellar mass black holes formed and interacted with their environments. Here, we present high spatial resolution observations of three dwarf galaxies in the X-ray (Chandra), the optical/near-infrared (Hubble Space Telescope), and the radio (Karl G. Jansky Very Large Array). These three galaxies were previously identified as hosting candidate active galactic nuclei on the basis of lower resolution X-ray imaging. With our new observations, we find that X-ray sources in two galaxies (SDSS J121326.01+543631.6 and SDSS J122111.29+173819.1) are off-nuclear and lack corresponding radio emission, implying they are likely luminous X-ray binaries. The third galaxy (Mrk 1434) contains two X-ray sources (each with LX ≈ 1040 erg s-1) separated by 2.8 arcsec, has a low metallicity [12 + log(O/H) = 7.8], and emits nebular He ii λ4686 line emission. The northern source has spatially coincident point-like radio emission at 9.0 GHz and extended radio emission at 5.5 GHz. We discuss X-ray binary interpretations (where an ultraluminous X-ray source blows a 'radio bubble') and active galactic nucleus interpretations (where an ≈ 4 × 105 M⊙ black hole launches a jet). In either case, we find that the He ii emission cannot be photoionized by the X-ray source, unless the source was ≈30-90 times more luminous several hundred years ago.

    Related items

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

    • An X-Ray-Selected Sample of Candidate Black Holes in Dwarf Galaxies
      Lemons, S.; Reines, A.; Plotkin, Richard; Gallo, E.; Greene, J. (2015)
      We present a sample of hard X-ray-selected candidate black holes (BHs) in 19 dwarf galaxies. BH candidates are identified by cross-matching a parent sample of ~44,000 local dwarf galaxies (M* = 3 × 10 9 M☉, z < 0.055) ...
    • Using the Fundamental Plane of black hole activity to distinguish X-ray processes from weakly accreting black holes
      Plotkin, Richard; Markoff, S.; Kelly, B.; Körding, E.; Anderson, S. (2012)
      The Fundamental Plane of black hole activity is a relation between X-ray luminosity, radio luminosity and black hole mass for hard-state Galactic black holes and their supermassive analogues. The Fundamental Plane suggests ...
    • A Radio-selected Black Hole X-Ray Binary Candidate in the Milky Way Globular Cluster M62
      Chomiuk, L.; Strader, J.; Maccarone, T.; Miller-Jones, James; Heinke, C.; Noyola, E.; Seth, A.; Ransom, S. (2013)
      We report the discovery of a candidate stellar-mass black hole in the Milky Way globular cluster M62. We detected the black hole candidate, which we call M62-VLA1, in the core of the cluster using deep radio continuum ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.