23,414 reputation
45089
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location Princeton, NJ
age 25
visits member for 2 years, 5 months
seen 7 hours ago

I am a graduate student studying astrophysics at Princeton. I received my bachelor's in physics and mathematics from Caltech (2011).

My primary interest is in general relativistic magnetohydrodynamics simulations of black hole accretion.


9h
comment If neutron would be lighter by 1 MeV, how stability of Hydrogen could be changed?
Presumably you meant the decay reaction $p \to n + \bar{e} + \nu_e$? (Note also electron capture would be $p + e \to n + \nu_e$.)
10h
comment In physics, what is the importance of distinguishing between a matrix and a group?
You're not the only one to list the closure property, but it is certainly unnecessary given the definition you provide of a binary operation on $G$. If we have $* : G \times G \to G$, then automatically we know $a * b \in G$.
15h
comment How is the Horizon Problem really a problem?
@Wood Don't worry, I at least understand your concern. But I've searched for years without finding a satisfactory answer, instead just seeing the same unjustified dogma repeated over and over. If you don't get a good answer over the next few days, feel free to ping me, since I would probably put my own bounty on the question then.
19h
reviewed Looks OK Is it possible to calculate neutron half-life theoretically?
19h
comment Exoplanet Mass-Radius Diagram
That diagram is from a paper that is seven years old. You might be interested in playing around with exoplanets.org, where you can make more up-to-date plots like this.
19h
reviewed Leave Open black body simulation
19h
reviewed Leave Open What will happen if I remove a nail which stops a plank from moving on a smooth floor because of a solid sphere pure rolling on it?
19h
reviewed Leave Open Many-worlds interpretation
Dec
24
reviewed Leave Open Is deuterium a boson or a fermion?
Dec
24
reviewed Close How can we derive the zero work done by the formula of potential energy
Dec
24
reviewed Close Does the density of matter increase as we approach the big bang?
Dec
24
reviewed Close Loop quantum gravity and string theory
Dec
24
comment I was told that if the Moon had a retrograde orbit, tides would have a faster rhythm. Why is that?
@User58220 Yes. Most major bodies in the Solar System rotate and revolve clockwise as viewed from Earth's South.
Dec
24
comment What is “special” and what is “general” in Relativity?
"you can't find more physics in a theory by allowing more general coordinates and frames" -- agreed. But that doesn't mean SR can handle arbitrary parameterizations of flat spacetime, which is almost what you seem to imply. At least, when people speak of SR my mind jumps to the Minkowski metric, not Minkowski spacetime in arbitrary coordinates. The latter isn't as rich as full GR, admittedly, but at the same time I'd hesitate to call it strictly SR. (I'm not downvoting by the way, just pointing out a slight difference of opinion on terminology.)
Dec
23
answered Space time curvature bends back
Dec
23
answered I was told that if the Moon had a retrograde orbit, tides would have a faster rhythm. Why is that?
Dec
23
comment What do units like joule * seconds imply?
This isn't a physics answer, but an English one, so I leave it as a comment. Division seems natural to you, but I contest this is a quirk of the English language, which has the words "per" and "for each" but not multiplicative analogs. Really, though, "12 eggs for each carton" is a way of saying "X, where X times 1 carton equals 12 eggs." In fact I've seen opinions that division is naturally conceived as multiplication with a variable factor and a fixed product. Multiplying units is so natural we never came up with English phrases to encapsulate the idea.
Dec
23
comment How would a fractal refract light?
While one might hope that simple ray optics -- regardless of its absolute correctness -- is internally consistent even in the presence of fractal surfaces, I'm not sure we're that lucky. Before considering something really complex, think about a perfect 0-width ray hitting a perfect convex corner in a mirror, right on the corner. Which way does the ray go? Alas it's not defined, since the normal to the surface is not defined at corners. A fractal just makes things worse, with normals failing to exist possibly on sets of measure greater than 0.
Dec
22
awarded  Guru
Dec
22
answered Can we solve most of the cosmological questions using the Illustris universe simulation?