Radio Galaxy Zoo Talk

ARG00035pg - triple?

  • JeanTate by JeanTate

    Centered on z_ph 0.351 ± 0.0268/0.350 ± 0.0601 SDSS J104516.56+090301.1

    enter image description here

    But the host may be the much fainter STAR SDSS J104516.78+090256.7

    Posted

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

    good point, one example where overlaid contours could help?

    Posted

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

    Yes indeed ... it seems pretty open-and-shut: it's a triple, with the STAR SDSS J104516.78+090256.7 the host:

    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

  • akapinska by akapinska scientist

    I wouldn't say the star is the host. I would rather take the galaxy detected clearly in both optical (SDSS) and infrared (WISE). Also, with FIRST resolution we don't really know where exactly the radio core is, hence my best bet would be the SDSS galaxy J104516.56+090301.1

    Posted

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

    Thanks!

    Wouldn't it also be possible that the faint object SDSS characterizes as a STAR[1] is, in fact, a galaxy with a redshift of >~0.5? Or even a QSO, with a redshift of >~2?

    There are two quite distinct local maxima in the FIRST data (there may be a third too). If the radio source is a doublelobe, then the FIRST data is good enough to say - with considerable confidence - that J104516.56+090301.1 (the GALAXY) is not at the center (i.e. that the lobes are asymmetric), isn't it? However, if it's either a triple or corelobe, then with equal confidence, couldn't we say that J104516.78+090256.7 (the STAR) is the host?

    [1] Explore gives its r magnitude as 23.19±0.32:

    enter image description here

    Posted