Radio Galaxy Zoo Talk

Speca, a doublelobe source associated with a spiral

  • JeanTate by JeanTate

    SDSS J140948.85-030232.5, Speca's host, is too far south to have an ARG ID (the southern-most I've found is Dec ~1.5; Speca has a Dec of -3.04). Speca? Spiral-host Episodic radio galaxy tracing Cluster Accretion! See Hota+ 2011. It's an Eos, or at least a highly inclined spiral, whose bulge (dia 3") has a thoroughly dead and red SDSS spectrum (z_sp 0.138):

    enter image description here

    enter image description here

    Yes, the association between the galaxy and the doublelobes seems pretty solid:

    enter image description here

    My thanks to super zooite c_cld for posting this fascinating object, on December 03, 2011, in the (now closed) GZ forum thread, Radio sources.

    Boilerplate: SDSS image per http://skyservice.pha.jhu.edu/DR10/ImgCutout/getjpeg.aspx, FIRST (red) contours derived from the FITS file produced using SkyView with Python code described in this RGZ Talk thread. Image center is the galaxy SDSS J140948.85-030232.5 (J2000.0). "z_sp" is an SDSS spectroscopic redshift of the galaxy in the center.

    Posted

  • zutopian by zutopian

    Related paper, which was submitted in 2014.: 1st author is also Hota.:

    New results on the exotic galaxy `Speca' and discovering many more Specas with RAD@home network
    Ananda Hota (1, 2), Judith H. Croston (3), Youichi Ohyama (4), C. S. Stalin (5), Martin J. Hardcastle (6), Chiranjib Konar (4), R.P. Aravind (2), Sheena M. Agarwal (2), Sai Arun Dharmik Bhoga (2), Pratik A. Dabhade (2), Amit A. Kamble (2), Pradeepta K. Mohanty (2), Alok Mukherjee (2), Akansha V. Pandey (2), Alakananda Patra (2), Renuka Pechetti (2), Shrishail S. Raut (2), V. Sushma (2), Sravani Vaddi (2), Nishchhal Verma (2)
    ((1) UM-DAE CBS, India, (2) RAD@home Astronomy Collaboratory, India, (3) U Southampton, UK, (4) ASIAA, Taiwan, (5) IIA, India, (6) U Hertfordshire, UK)

    We present the first report on an innovative new project named "RAD@home", a citizen-science research collaboratory built on free web-services like Facebook, Google, Skype, NASA Skyview, NED, TGSS etc.. This is the first of its kind in India, a zero-funded, zero-infrastructure, human-resource network to educate and directly involve in research, hundreds of science-educated under-graduate population of India, irrespective of their official employment and home-location with in the country. Professional international collaborators are involved in follow up observation and publication of the objects discovered by the collaboratory. We present here ten newly found candidate episodic radio galaxies, already proposed to GMRT, and ten more interesting cases which includes, bent-lobe radio galaxies located in new Mpc-scale filaments, likely tracing cosmological cluster accretion from the cosmic web.
    Two new Speca-like rare spiral-host large radio galaxies have also been been reported here. Early analyses from our follow up observations with the Subaru and XMM-Newton telescopes have revealed that Speca is likely a new entry to the cluster and is a fast rotating, extremely massive, star forming disk galaxy. Speca-like massive galaxies with giant radio lobes, are possibly remnants of luminous quasars in the early Universe or of first supermassive black holes with in first masssve galaxies. As discoveries of Speca-like galaxies did not require new data from big telescopes, but free archival radio-optical data, these early results demonstrate the discovery potential of RAD@home and how it can help resource-rich professionals, as well as demonstrate a model of academic-growth for resource-poor people in the underdeveloped regions via Internet.

    (Submitted on 15 Feb 2014)
    http://arxiv.org/abs/1402.3674

    The RAD@home project is mentioned in below paper.: 1st and 2nd author are Zooniverse scientists.:

    Ideas for Citizen Science in Astronomy
    Authors: Philip J. Marshall,1 Chris J. Lintott,2 and Leigh N. Fletcher3
    Annual Review of Astronomy and Astrophysics Vol. 53: 247-278 (Volume publication date August 2015)
    First published online as a Review in Advance on June 18, 2015
    DOI: 10.1146/annurev-astro-081913-035959
    http://www.annualreviews.org/doi/full/10.1146/annurev-astro-081913-035959
    http://www.annualreviews.org/doi/pdf/10.1146/annurev-astro-081913-035959 (pdf version: full text is free)

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