by VictorBorun » Wed May 03, 2023 1:05 pm
Ann wrote: ↑Wed May 03, 2023 7:18 am
shaileshs wrote: ↑Wed May 03, 2023 4:20 am
Multiple things (questions) top of my head - 1) Why jet stream is visible only on 1 side ? 2) Why jet stream is only red in color ? 3) What's the while "halo" filled all around the center ? 4) With such distorted (mixed eliptical/circular) shape, how do we even know/how can we define edge of galaxy and size of galaxy ? 5) We can see stars with spikes obviously in our own milky way and we can clearly see some various size/shaped galaxies in background but apart from those obvious ones, there's 1000s of light sources seen - bright/dim, yellow/white/blue.. how do we know (or how we can make out) how many and which ones are stars v/s galaxies ? Ufffff... I need to read a bit more on these topics.. Thanks in advance for all comments/answers.
Rather than editing my first post, I'll make a new one to post an M87 image that I didn't see before, showing
two jets from M87. (Or rather, the image shows two
shock waves from the two jets of M87:
Ann
On one-tail galaxies (I only mean tails starting right at the centre of the core) we now know one explanation:
a runaway central black hole.
Consider:
1) the current central BH of Cen A weighs only 55 million Suns and thus must be an impostor after the original billionaire BH ran away
2) there was in fact a merger, maybe less than a billion years ago
3) the long red tail at 11 o'clock, however dissipated, does seem to originate rather from the centre than from an arm or dust ring
The author of this APOD image writes:
The rarely imaged long filamentary jet, extending from the core in the upper left of the picture, is the visible result of the nucleo activity and is created by the outflow of gas accumulated in the accretion disk surrounding the supermassive black hole.
But the jets must go in pairs; even when the starting parts of the jets are relativistically fast and the one that speeds toward us is brightened for us and the other one is dimmed, still the warm clouds they create in the media are not relativistically fast and look more symmetrical to us.
To make a 300 kly tail without a counter part you have to merge two billionaire BHs with co-directional spins: such merger pinches the space-time fabric, fires a one-directional gravitation wave packet of some 100 million Suns mass-energy and kicks the merged BH out of the galaxy at some 1500 km/s.
Here is a more fresh and evident (less dissipated) one-tail case:
[quote=Ann post_id=330712 time=1683098316 user_id=129702]
[quote=shaileshs post_id=330706 time=1683087640 user_id=143908]
Multiple things (questions) top of my head - 1) Why jet stream is visible only on 1 side ? 2) Why jet stream is only red in color ? 3) What's the while "halo" filled all around the center ? 4) With such distorted (mixed eliptical/circular) shape, how do we even know/how can we define edge of galaxy and size of galaxy ? 5) We can see stars with spikes obviously in our own milky way and we can clearly see some various size/shaped galaxies in background but apart from those obvious ones, there's 1000s of light sources seen - bright/dim, yellow/white/blue.. how do we know (or how we can make out) how many and which ones are stars v/s galaxies ? Ufffff... I need to read a bit more on these topics.. Thanks in advance for all comments/answers.
[/quote]
Rather than editing my first post, I'll make a new one to post an M87 image that I didn't see before, showing [b][i]two[/i][/b] jets from M87. (Or rather, the image shows two [i]shock waves[/i] from the two jets of M87:
[img3="A Spitzer Space Telescope image of two shock waves from the two jets of M87. Credits: NASA/JPL-Caltech/IPAC"]https://www.nasa.gov/sites/default/files/styles/full_width/public/thumbnails/image/pia23122-16.jpg?itok=RxoSXvca[/img3]
Ann
[/quote]
On one-tail galaxies (I only mean tails starting right at the centre of the core) we now know one explanation:
a runaway central black hole.
Consider:
1) the current central BH of Cen A weighs only 55 million Suns and thus must be an impostor after the original billionaire BH ran away
2) there was in fact a merger, maybe less than a billion years ago
3) the long red tail at 11 o'clock, however dissipated, does seem to originate rather from the centre than from an arm or dust ring
The author of this APOD image writes:
[url=https://www.glitteringlights.com/Images/Galaxies/i-rXzDxS3/A]The rarely imaged long filamentary jet, extending from the core in the upper left of the picture, is the visible result of the nucleo activity and is created by the outflow of gas accumulated in the accretion disk surrounding the supermassive black hole. [/url]
But the jets must go in pairs; even when the starting parts of the jets are relativistically fast and the one that speeds toward us is brightened for us and the other one is dimmed, still the warm clouds they create in the media are not relativistically fast and look more symmetrical to us.
To make a 300 kly tail without a counter part you have to merge two billionaire BHs with co-directional spins: such merger pinches the space-time fabric, fires a one-directional gravitation wave packet of some 100 million Suns mass-energy and kicks the merged BH out of the galaxy at some 1500 km/s.
[url=https://arxiv.org/abs/2302.04888]Here[/url] is a more fresh and evident (less dissipated) one-tail case:
[attachment=0]runaway super massive central black hole.png[/attachment]