All Questions
8
questions
1
vote
0
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29
views
Are there any experiments or observations indicating that the Hubble flow can influence AGNs, quasars and galactic winds (outflows)?
Galactic winds (or outflows) are produced by AGNs (Active Galactic Nuclei), quasars, supernovas...etc which basically eject matter usually in form of waves or spheres, sometimes even arriving to the ...
- 1,017
3
votes
1
answer
544
views
Could life develop in a galaxy with a quasar at its centre?
Quasars are a type of Active Galactic Nucleus that inhabit the centres of some galaxies. They are among the most energetic objects known in the universe, emitting up to a thousand times the energy ...
- 1,071
0
votes
2
answers
65
views
How can I find more information on a certain galaxy when NED isn't helping?
The paper High Frequency Peakers: Young radio sources or flaring blazars? by S.Tinti et.al. lists some nice radio-wavelength SEDs, like these for instance:
When looking for more photometric info on a ...
- 2,600
6
votes
1
answer
2k
views
Is there a recent update on the mysterious M82 radio source reported in 2010?
The Wikipedia page on the "Cigar Galaxy" (M82) has the following summary about an "unknown object":
In April 2010, radio astronomers working at the Jodrell Bank
Observatory of the University of ...
- 1,213
2
votes
1
answer
463
views
Do gravitationally bound (e.g. orbiting) objects really resist the expansion of space?
Thinking about the expansion of space, it is commonly explained that gravitationally bound objects (like galaxies and galaxy clusters) will not be affected by the expansion of space (dark energy). I ...
- 4,381
3
votes
0
answers
177
views
Number of obscured AGN compared to unobscured AGN
Urry and Padovani 1995 proposed a unified model for Active Galactic Nuclei, which has since been recognised as a good model for AGN. If AGN are randomly oriented, then I'd expect there to be more ...
- 2,600
2
votes
1
answer
639
views
What would be the outcome for life in our galaxy if the merger of the Milky Way and Andromeda creates a Quasar?
If predictions are correct, the Milky Way and Andromeda are set to collide in around 4 billion years. If, when this occurs, a Quasar is formed by matter being accreted to the common galactic center (...
- 123
10
votes
1
answer
377
views
What is the scale of things you can see with gravitational lensing?
I'm trying to understand the examples of gravity lensing (using the general relativity property of large masses to bend light like a lens).
Most of the examples I see are of some galaxy (presumably ...
- 293