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

    Duty cycle of the radio galaxy B2 0258+35

    274434.pdf (924.6Kb)
    Access Status
    Open access
    Authors
    Brienza, M.
    Morganti, R.
    Murgia, M.
    Vilchez, N.
    Adebahr, B.
    Carretti, E.
    Concu, R.
    Govoni, F.
    Harwood, J.
    Intema, Hubertus
    Loi, F.
    Melis, A.
    Paladino, R.
    Poppi, S.
    Shulevski, A.
    Vacca, V.
    Valente, G.
    Date
    2018
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Brienza, M. and Morganti, R. and Murgia, M. and Vilchez, N. and Adebahr, B. and Carretti, E. and Concu, R. et al. 2018. Duty cycle of the radio galaxy B2 0258+35. Astronomy and Astrophysics. 618: Article ID A45.
    Source Title
    Astronomy and Astrophysics
    DOI
    10.1051/0004-6361/201832846
    ISSN
    0004-6361
    Remarks

    Reproduced with permission from Astronomy & Astrophysics, © ESO

    URI
    http://hdl.handle.net/20.500.11937/74077
    Collection
    • Curtin Research Publications
    Abstract

    Context. Radio loud active galactic nuclei (AGN) are episodic in nature, cycling through periods of activity and quiescence. The study of this duty cycle has recently gained new relevance because of the importance of AGN feedback for galaxy evolution. Aims. In this work we investigate the duty cycle of the radio galaxy B2 0258+35, which was previously suggested to be a restarted radio galaxy based on its morphology. The radio source consists of a pair of kpc-scale jets embedded in two large-scale lobes (~240 kpc) with relaxed shape and very low surface brightness, which resemble remnants of a past AGN activity. Methods. We have combined new LOFAR data at 145 MHz and new Sardinia Radio Telescope data at 6600 MHz with available WSRT data at 1400 MHz to investigate the spectral properties of the outer lobes and derive their age. Results. Interestingly, the spectrum of both the outer northern and southern lobes is not ultra-steep as expected for an old ageing plasma with spectral index values equal to a1451400 = 0.48 ± 0.11 and a14006600 = 0.69 ± 0.20 in the outer northern lobe, and a1451400 = 0.73 ± 0.07 in the outer southern lobe. Moreover, despite the wide frequency coverage available for the outer northern lobe (145-6600 MHz), we do not identify a significant spectral curvature (SPC ~ 0.2 ± 0.2). Conclusions. While mechanisms such as in-situ particle reacceleration, mixing or compression can temporarily play a role in preventing the spectrum from steepening, in no case seem the outer lobes to be compatible with being very old remnants of past activity as previously suggested (with age ? 80 Myr). We conclude that either the large-scale lobes are still fuelled by the nuclear engine or the jets have switched off no more than a few tens of Myr ago, allowing us to observe both the inner and outer structure simultaneously. Our study shows the importance of combining morphological and spectral properties to reliably classify the evolutionary stage of low surface brightness, diffuse emission that low frequency observations are revealing around a growing number of radio sources.

    Related items

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

    • Wide-field LOFAR imaging of the field around the double-double radio galaxy B1834+620: A fresh view on a restarted AGN and doubeltjes
      Orru, E.; Van Velzen, S.; Pizzo, R.; Yatawatta, S.; Paladino, R.; Iacobelli, M.; Murgia, M.; Falcke, H.; Morganti, R.; De Bruyn, A.; Ferrari, C.; Anderson, J.; Bonafede, A.; Mulcahy, D.; Asgekar, A.; Avruch, I.; Beck, R.; Bell, M.; Van Bemmel, I.; Bentum, M.; Bernardi, G.; Best, P.; Breitling, F.; Broderick, J.; Bruggen, M.; Butcher, H.; Ciardi, B.; Conway, J.; Corstanje, A.; De Geus, E.; Deller, A.; Duscha, S.; Eisloffel, J.; Engels, D.; Frieswijk, W.; Garrett, M.; Grießmeier, J.; Gunst, A.; Hamaker, J.; Heald, G.; Hoeft, M.; Van Der Horst, A.; Intema, Hubertus; Juette, E.; Kohler, J.; Kondratiev, V.; Kuniyoshi, M.; Kuper, G.; Loose, M.; Maat, P.; Mann, G.; Markoff, S.; McFadden, R.; McKay-BGBRowski, D.; Miley, G.; Moldon, J.; Molenaar, G.; Munk, H.; Nelles, A.; Paas, H.; Pandey-Pommier, M.; Pandey, V.; Pietka, G.; Polatidis, A.; Reich, W.; Rottgering, H.; Rowlinson, A.; Scaife, A.; Schoenmakers, A.; Schwarz, D.; Serylak, M.; Shulevski, A.; Smirnov, O.; Steinmetz, M.; Stewart, A.; Swinbank, J.; Tagger, M.; Tasse, C.; Thoudam, S.; Toribio, M. (2015)
      The existence of double-double radio galaxies (DDRGs) is evidence for recurrent jet activity in active galactic nuclei (AGN), as expected from standard accretion models. A detailed study of these rare sources provides new ...
    • The peculiar radio galaxy 4C 35.06: A case for recurrent AGN activity?
      Shulevski, A.; Morganti, R.; Barthel, P.; Murgia, M.; Van Weeren, R.; White, G.; Brüggen, M.; Kunert-Bajraszewska, M.; Jamrozy, M.; Best, P.; Röttgering, H.; Chyzy, K.; De Gasperin, F.; Bîrzan, L.; Brunetti, G.; Brienza, M.; Rafferty, D.; Anderson, J.; Beck, R.; Deller, A.; Zarka, P.; Schwarz, D.; Mahony, E.; Orru, E.; Bell, M.; Bentum, M.; Bernardi, G.; Bonafede, A.; Breitling, F.; Broderick, J.; Butcher, H.; Carbone, D.; Ciardi, B.; De Geus, E.; Duscha, S.; Eislöffel, J.; Engels, D.; Falcke, H.; Fallows, R.; Fender, R.; Ferrari, C.; Frieswijk, W.; Garrett, M.; Grießmeier, J.; Gunst, A.; Heald, G.; Hoeft, M.; Hörandel, J.; Horneffer, A.; Van Der Horst, A.; Intema, Hubertus; Juette, E.; Karastergiou, A.; Kondratiev, V.; Kramer, M.; Kuniyoshi, M.; Kuper, G.; Maat, P.; Mann, G.; McFadden, R.; McKay-Bukowski, D.; McKean, J.; Meulman, H.; Mulcahy, D.; Munk, H.; Norden, M.; Paas, H.; Pandey-Pommier, M.; Pizzo, R.; Polatidis, A.; Reich, W.; Rowlinson, A.; Scaife, A.; Serylak, M.; Sluman, J.; Smirnov, O.; Steinmetz, M.; Swinbank, J.; Tagger, M.; Tang, Y.; Tasse, C.; Thoudam, S.; Toribio, M. (2015)
      Using observations obtained with the LOw Fequency ARray (LOFAR), the Westerbork Synthesis Radio Telescope (WSRT) and archival Very Large Array (VLA) data, we have traced the radio emission to large scales in the complex ...
    • M 87 at metre wavelengths: The LOFAR picture
      De Gasperin, F.; Orrú, E.; Murgia, M.; Merloni, A.; Falcke, H.; Beck, R.; Beswick, R.; Bîrzan, L.; Bonafede, A.; Brüggen, M.; Brunetti, G.; Chyz°y, K.; Conway, J.; Croston, J.; Enßlin, T.; Ferrari, C.; Heald, G.; Heidenreich, S.; Jackson, N.; MacArio, G.; McKean, J.; Miley, G.; Morganti, R.; Offringa, A.; Pizzo, R.; Rafferty, D.; Röttgering, H.; Shulevski, A.; Steinmetz, M.; Tasse, C.; Van Der Tol, S.; Van Driel, W.; Van Weeren, R.; Van Zwieten, J.; Alexov, A.; Anderson, J.; Asgekar, A.; Avruch, M.; Bell, M.; Bell, M.; Bentum, M.; Bernardi, G.; Best, P.; Breitling, F.; Broderick, J.; Butcher, A.; Ciardi, B.; Dettmar, R.; Eisloeffel, J.; Frieswijk, W.; Gankema, H.; Garrett, M.; Gerbers, M.; Griessmeier, J.; Gunst, A.; Hassall, T.; Hessels, J.; Hoeft, M.; Horneffer, A.; Karastergiou, A.; Köhler, J.; Koopman, Y.; Kuniyoshi, M.; Kuper, G.; Maat, P.; Mann, G.; Mevius, M.; Mulcahy, D.; Munk, H.; Nijboer, R.; Noordam, J.; Paas, H.; Pandey, M.; Pandey, V.; Polatidis, A.; Reich, W.; Schoenmakers, A.; Sluman, J.; Smirnov, O.; Sobey, Charlotte; Stappers, B.; Swinbank, J. (2012)
      Context.M 87 is a giant elliptical galaxy located in the centre of the Virgo cluster, which harbours a supermassive black hole of mass 6.4 × 109 M·, whose activity is responsible for the extended (80 kpc) radio lobes that ...
    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.