Radio Galaxy Zoo Talk

ARG0001k1b: an interesting field; what are the hosts?

  • JeanTate by JeanTate

    Here's a copy of a post by sisifolibre, on p11 of the Suggestions for RGZ Objects to show with detailed FIRST contours overlaid on SDSS images thread:


    About my last post here.... now I make my overlaids! I am learning to use Aladin like Dolorous Edd... they aren't so detaled like yours but i'm trying 😃.

    Red circles are AllWISE sources, blue circles are SDSS sources

    enter image description here

    And here's a contour overlay image by me:

    enter image description here

    I think sisifolibre's overlay image is pretty good, don't you?

    But what are the hosts of five ~#compact radio sources? Perhaps some zooming in might help? Stay tuned! 😃

    The image in this post was created from sources, and using methods, described in this RGZ Talk post. The object at the center of the image is SDSS J133540.86+325457.6

    Posted

  • sisifolibre by sisifolibre

    Thanks Jean, now I make it better 😃

    I think there hare 3 host here.

    • CENTER: N to S, a #triple host AllWISE J133541.44+325406.8 #noOP.
    • NE: elongated #compact or hidden doublelobe, host SDSS J133537.11+325510.7 - 1237665024375129101 aka AllWISE J133537.16+325511.3
    • SW: #compact host AllWISE J133543.81+325403.3 #noOP

    enter image description here

    Posted

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

    But what are the hosts of five ~#compact radio sources? Perhaps some zooming in might help? Stay tuned! 😃

    I tried zooming in, centered on various SDSS objects which might be hosts. Pretty confusing results! 😮

    Centered on zph 0.703±0.068 SDSS J133537.11+325510.7; I suppose it could be a #corejet?:

    enter image description here enter image description here

    Centered on ??? SDSS J133541.12+325440.4; a #compact, but is the SDSS host real?:

    enter image description here enter image description here

    Centered on zph 0.376±0.114 SDSS J133540.44+325417.3; doesn't look like a host, does it?

    enter image description here enter image description here

    Centered on zph 0.495±0.117 SDSS J133541.10+325340.4; ditto:

    enter image description here enter image description here

    Centered on zph 0.743±0.086 SDSS J133537.11+325510.7; likewise:

    enter image description here enter image description here

    So, perhaps a high-z #bhgroup, even a cluster?, with most hosts too faint to be detected by SDSS, and a couple also too faint to be picked up by WISE? Lots of #ifrs??

    Whatever it is (or they are), sure seems interesting, doesn't it? 😄

    Great find, sisifolibre! 😃

    The contour overlay images in this post were created from sources, and using methods, described in this RGZ Talk thread.

    Posted

  • 42jkb by 42jkb scientist, admin in response to JeanTate's comment.

    This is very interesting and it is great to see that JeanTate's method of overlays is being utilised by others.

    To be honest, I really have no idea what this is.

    Posted

  • dosey by dosey

    Is it a sort of spiral of radio blobs, like a snail opening out towards the north?

    Posted

  • dosey by dosey

    I know you can all laugh at this??? How about a mobile black hole spurting as it moves OR a signal given out from an ancient civilisation on a distant planet and broadcast in all directions from their last space mission????
    OK....so I'm no scientist! Only joking.

    Posted

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

    What we do know is that the radio telescopes picked up some radio emissions, in the FIRST survey, and that when these are displayed as (red, or blue/white, or pink/yellow/white) contours overlaid onto an image of the same part of the sky obtained from the SDSS survey, they appear as a set of interesting blobs, with no obvious relationship(s) with the galaxies (or stars) in the image.

    The ARG field - ARG0001k1b - shows the same radio data, displayed using different techniques (blue/white, with contours), on a 'canvass' that is data from the WISE (infrared) survey.

    As 42jkb said, what it is - physically - is a bit of a mystery at the moment. For example, it's possible - but rather unlikely - that at least some of the radio emission is not real, in the sense of coming from a distant galaxy (or star) ... it might be an artifact (artifacts are common in FIRST, but as far as I know none look like anything in this field).

    Myself, I think sisifolibre has a good description ("noOP" means no optical source, or host):

    I think there hare 3 host here.

    CENTER: N to S, a #triple host AllWISE J133541.44+325406.8 #noOP.

    NE: elongated #compact or hidden doublelobe, host SDSS J133537.11+325510.7 - 1237665024375129101 aka AllWISE J133537.16+325511.3

    SW: #compact host AllWISE J133543.81+325403.3 #noOP

    Hope this helps, and happy hunting! 😃

    Posted