ARG00018kt, diffuse extended doublelobe, host disk?
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by
ChrisMolloy
Here's ARG00018kt, which appears to be a #diffuse, #extended, #doublelobe. The contour overlays below are positioned on SDSS J164628.41+383116.0, which is ESE of the ARG co-ordinates listed left.
The contour overlay image in this post was created from sources, and using methods, described in this RGZ Talk
thread. First contours are in red.The host for the emission appears to be SDSS J164628.41+383116.0, which has a z_sp=0.108 +/- 0.00004. This object has radio references in NED and possibly SIMBAD, and an ALLWISE reference, ALLWISE J164628.43+383115.7. The SIMBAD reference is slightly NE of SDSS J164628.41+383116.0.
Whether this object is a #disk galaxy is hard to determine. GZ2 classifications list it as having more of an elliptical than a disk morphology, although the spectrum cites it as being #starforming. It has a fracDev_g, _r, of 0.975 and 0.954 and an expAB_g of 0.623 and expAB_r of 0.636 respectively. For c, the inverse concentration index, it has a figure of 0.330 for the g band and 0.334 for the r band. Possibly not a disk galaxy, although the object is #inclined, #edgeon. Others may have a view on this.
This ARG field has been imaged in VLASS, bellow.
The contour overlay image in this post was created from sources, and using methods, described in this RGZ Talk
thread. VLASS contours are in yellow.As always, comments, suggestions, welcome.
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by
JeanTate
Yet another mystery ...
Maybe I've been looking at too many optical images, but I think the galaxy SDSS J164628.41+383116.0 looks a bit strange. Maybe it's just relative diffraction or slight mis-alignment, but the bulge seems somewhat extended, and red. Yet similar appearance in DECaLS (MzLS+BASS DR6) suggests nothing unusual. And the spectrum looks normal too.
On the other hand, what other possible host(s) is/are there? Especially given the size and shape of the radio emission ...
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