27,748 reputation
459104
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location Princeton, NJ
age 26
visits member for 2 years, 11 months
seen 1 hour 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.


Sep
9
reviewed Leave Open Question about electromagnetic Spectrum
Sep
8
answered Demostrating possible equivalence of two tensors
Sep
8
comment Equation regarding the Riemann tensor in the Cartan formalism
I don't know if you are intentionally overstacking the indices on the Riemann tensor, but in case not: $R^{\alpha\beta}{}_{\nu\rho}$ can be hacked R^{\alpha\beta}{}_{\nu\rho} or {R^{\alpha\beta}}_{\nu\rho}. The former risks breaking across line wraps, and the latter is semantically wrong, but they work in a pinch.
Sep
8
revised Tensor Product of a Bra and a Ket
gave standard tex notation, as per request
Sep
8
comment Is data which rides on the carrier frequency dangerous?
-1 For "substantial danger": You can strap your cell phone or wireless router to your head and crank up the transmission all you want - absolutely nothing will happen.
Sep
8
comment Measuring more accurately the distance of remote galaxies
A very good question about a subtle issue. I think this touches on the oft-neglected aspect of cosmology (which would certainly be an appropriate tag here) that homogeneity/isotropy kicks in only at a certain scale, but I'm not confident enough to turn such into an answer. By the way, there's no fixed definition of "group" - just whatever algorithm you choose to employ.
Sep
8
reviewed Reject If you spin a magnet in space, far from any magnet field, would it spin forever, being able to produce electricity forever?
Sep
7
reviewed Close Why are orbits elliptical?
Sep
7
reviewed Leave Open Riemann curvature tensor notation in Wald
Sep
7
reviewed Leave Open Why does this perpetuum mobile not work?(Gases and Densities)
Sep
7
reviewed Close Expanding universe space through matter or matter through space?
Sep
7
reviewed Leave Open Using sinusoids to represent sound waves
Sep
7
comment Riemann curvature tensor notation in Wald
Since it appears you're just starting in GR, might I suggest you start with a different book? Wald is great for some things, but, for instance, it was only the third GR text I read in depth. If it had been my first, I'm sure I would have gotten hung up on the notation and missed the physics he was trying to convey.
Sep
7
awarded  Good Answer
Sep
7
answered Why are orbits elliptical?
Sep
7
comment (Why) is dumping liquid nitrogen on your head dangerous?
AHHHHHHH!!!! Don't do that. Leidenfrost protects you from a drop of LN2. That was incredibly risky and utterly irresponsible to demonstrate as part of a viral trend.
Sep
6
revised The study of the physical universe
edited tags
Sep
6
comment The study of the physical universe
Obligatory
Sep
5
awarded  Enlightened
Sep
5
awarded  Nice Answer