Radio Galaxy Zoo Talk

Star (spectrum class) in front of a spiral? A tailed radio source?

  • zutopian by zutopian

    WizardHowl did following comment in a discussion about another object..

    Just came across another example, although here the radio emission looks nat-like: http://radiotalk.galaxyzoo.org/#/subjects/ARG0002y28
    This one seems like it might be showing more of the galaxy behind the star in optical but it is hard to be sure. The other radio source in the field of view is SDSS J153617.25+112835.6 Z_sp=0.603 and has about the same angular size in optical as this, so potentially might be related.

    http://radiotalk.galaxyzoo.org/#/boards/BRG0000002/discussions/DRG00006q8

    There are related comments below the Radio Zoo image ARG0002y28 .

    Posted

  • zutopian by zutopian

    Here is the SDSS image.:

    enter image description here

    There are two photometric objects in the center, but just one spectrum.:
    The spectrum class of the the bright object is STAR.
    The other object is a galaxy (photometric object type). I think, that it looks like a spiral.
    photoZ (KD-tree method)
    0.067 ± 0.1070
    photoZ (RF method)
    0.119 ± 0.1702

    Posted

  • JeanTate by JeanTate

    Unless there's a radio-SDSS offset, the apparent source of the radio emission is the bright star with the F9 spectrum, not the faint galaxy to its south:

    enter image description here

    <enter image description here>

    Boilerplate: SDSS image per http://skyservice.pha.jhu.edu/DR10/ImgCutout/getjpeg.aspx, FIRST contours derived from FITS files produced using SkyView with Python code described in this RGZ Talk thread. Image center per the ARG image (left; J2000).

    Posted

  • zutopian by zutopian in response to JeanTate's comment.

    Unless there's a radio-SDSS offset, the apparent source of the radio emission is the bright star with the F9 spectrum, not the faint galaxy to its south:

    NED Ref is following paper.:

    A Sample of Candidate Radio Stars in FIRST and SDSS

    (...) The selection criteria are positional coincidence within $1\arcsec$, radio and optical point source morphology, and an
    SDSS spectrum classified as stellar.
    (...)
    We conclude that, while the present wide-area radio surveys are not sensitive enough to provide homogeneous samples of the extremely rare radio stars, upcoming surveys which exploit the great sensitivity of current and planned telescopes do have sufficient sensitivity and will allow the properties of this class of object to be investigated in detail.

    Amy E. Kimball, Gillian R. Knapp, Zeljko Ivezic, Andrew A. West, John J. Bochanski, Richard M. Plotkin, Michael S. Gordon
    (Submitted on 16 Jun 2009 (v1), last revised 18 Jun 2009 (this version, v3))
    http://arxiv.org/abs/0906.3030

    Here is the list of the 112 radio star candidates.:
    http://iopscience.iop.org/0004-637X/701/1/535/fulltext/apj305758t1_mrt.txt

    Posted