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Geometry of jets, e.g. Pictor A



 
 
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  #1  
Old January 19th 17, 04:53 AM posted to sci.astro.research
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Default Geometry of jets, e.g. Pictor A

Object e.g.
http://chandra.harvard.edu/photo/2016/pictora/

Is there an example of an active galaxy with extended million light
year long radio and or xray jets such as Pictor A, where the Hot
Spot is within the larger lobes rather than protruding to one side
as is the case in Pictor A?

ie, if the jet is coming right at us, then the hot spot ought to
be close to centered within the lobe on our side of the BH emitting
the jets.

Has anyone written a paper where they studied the position of the
hot spot(s) within the larger lobes to estimate the orientation of
the jets relative to our line of sight?

Thanks,

rt
  #2  
Old January 20th 17, 05:43 PM posted to sci.astro.research
Martin Brown
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Default Geometry of jets, e.g. Pictor A

On 19/01/2017 03:53, wrote:
Object e.g.
http://chandra.harvard.edu/photo/2016/pictora/

Is there an example of an active galaxy with extended million light
year long radio and or xray jets such as Pictor A, where the Hot
Spot is within the larger lobes rather than protruding to one side
as is the case in Pictor A?


It is only a line of sight effect but any where the jet is pointing
nearly towards us within the envelope of the radio lobe will do.

3C303 would appear to be a good FRII candidate for this.

ie, if the jet is coming right at us, then the hot spot ought to
be close to centered within the lobe on our side of the BH emitting
the jets.


3C84 aka Perseus A NGC 1275 might just about fit that tag. It is
confusing though - originally first thought to be a Seyfert galaxy.

--
Regards,
Martin Brown
  #3  
Old February 26th 17, 11:34 PM posted to sci.astro.research
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Default Geometry of jets, e.g. Pictor A

On Friday, January 20, 2017 at 8:43:18 AM UTC-8, Martin Brown wrote:

3C303 would appear to be a good FRII candidate for this.


Thanks.

3C303 is a really interesting galaxy / radio lobes. Do you know of a
time sequence for that one? See the radio hot spot to the left of the
image? It's right on a line toward the well established hot spot to the
right, but, it's totally disconnected. It looks like it could be a
separate galaxy or object it is so disconnected. But it also could be a
hot spot that is just beginning to form.

If the latter, I'd expect an evolution in luminosity............of
course it's so far from the core of the galaxy if that's what it is,
that evolution would be over really long time scales (most likely).
Still, interesting to look for faint connections to the central black
hole on that one.

3C84 aka Perseus A NGC 1275 might just about fit that tag. It is

confusing though - originally first thought to be a Seyfert galaxy.

It looks to me like a galaxy where the radio jets have turned off and
the radio is fading away. Does this idea fit?

Thanks,
rt

 




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