ARG0002w82 - big double lobe with no apparent host (IR or optical)
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by JeanTate
Not an IFRS - because it's too big - and for the host to be invisible in both WISE and SDSS it must have a redshift >~0.7-0.8; if so, that would make this a giant, right?
Posted
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by DocR scientist
@JeanTate I'm not sure which nearby component you think is associated. Add a picture?
Posted
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by JeanTate in response to DocR's comment.
There are two 'contoured' radio sources in the ARG field; the W one is slightly elongated and fairly bright, the E one faint and diffuse. If these are two lobes, then the host should be ~in the middle; there are no WISE or SDSS sources anywhere between the two radio sources. Assuming this is a double-lobe structure, at z=0.75, how big would it be (physically, in kpc)?
Maybe I'm just completely misjudging distance (and should make my own estimate first, ...) 😦
Posted
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by JeanTate in response to JeanTate's comment.
Answering my own question:
Assuming this is a double-lobe structure, at z=0.75, how big would it be (physically, in kpc)?
~300 kpc (per Ned Wright, 71/27/73 cosmology)
Maybe I'm just completely misjudging distance (and should make my own estimate first, ...) :
Yes, you (I) should ...
Posted
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by DocR scientist
This could be a double, west just brighter and more compact, east (left) looks like a classical hot spot. But there is a faint SDSS source SDSS J114730.86+120139.5 at the location of the peak in the eastern region, so who knows?
(I smoothed SDSSr a little to be able to see this.Posted