Questions tagged [astrophysics]
Questions involving the physics of the universe, especially the nature of astronomical objects, energy fields, and/or regions, rather than their positions or motions in space.
8
questions
1
vote
1
answer
56
views
What exactly does $k\sigma$ mean in astrophysics and cosmology?
In statistics, $\sigma$ or $1\sigma$ is the standard deviation. For the normal distribution, approximately $68\%$ of the values lie within $1\sigma$ range, $95\%$ within $2\sigma$, and $99.7\%$ within ...
- 441
0
votes
1
answer
147
views
Someone explain how a naked singularity is possible
I was reading this wiki article about naked singularities, however I don't really understand the how a gravitational singularity can simply exist without an event horizon. Can someone explain/...
2
votes
2
answers
75
views
Mathematical modeling of the influence of components of the interstellar medium on the distortion of the wavefront of the observed object
Associated with: Flowchart of the pipeline of key processes for modeling wavefront distortion of astronomical objects: ground-based observation case
Let's imagine for a moment that we are outside the ...
- 853
1
vote
1
answer
40
views
Flowchart of the pipeline of key processes for modeling wavefront distortion of astronomical objects: ground-based observation case
Associated with: Mathematical modeling of the influence of components of the interstellar medium on the distortion of the wavefront of the observed object
Being inspired by this article, as well as ...
- 853
1
vote
0
answers
15
views
cross-matched SDSS-WISE catalog
Please where can I find cross-matched SDSS and WISE dataset for a machine learning project?
(Galaxy-star-qso classification task)
0
votes
2
answers
139
views
Do all photons coming out of the Sun go out radially?
I am trying to understand why we can assume that all light rays from the Sun are in parallel.
- 171
2
votes
0
answers
83
views
Would we know if the universe was rotating?
I was wondering what we would observe if the universe had a small rotation. My conclusion was that galaxies on the equatorial plane of the universe would be slightly more redshifted than galaxies than ...
- 373
2
votes
2
answers
60
views
Computing error bar for vertex of parabola-fit lightcurve
I have a long-term lightcurve for my source, to which I have used orthogonal distance regression to fit a quadratic model [expected flux]=a[year]²+b[year]+c.
Part of our data analysis includes finding ...
- 23