29,671 reputation
463111
bio website
location Princeton, NJ
age 26
visits member for 3 years, 1 month
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.


Mar
9
reviewed Approve
Mar
9
reviewed Approve
Mar
9
reviewed Approve Tensor decomposition under $\mathrm{SU(3)}$
Mar
9
comment How was this dot identified as a mystery planet originally (Pluto in this case)?
@PeterMortensen Assuming circular, coplanar orbits, then I think measuring just the position of the planet and the rate of change of that angle (i.e. using just two images) gives you enough information to find its distance. But eccentricity adds another parameter, so you need more observations. Of course, most of Pluto's motion on sky is actually due to us moving, so in the limit that it can be taken to be still, you can again approximate its distance with just two measurements.
Mar
9
revised How was this dot identified as a mystery planet originally (Pluto in this case)?
added more information
Mar
9
answered How was this dot identified as a mystery planet originally (Pluto in this case)?
Mar
9
revised How was this dot identified as a mystery planet originally (Pluto in this case)?
edited tags
Mar
8
comment Zeno’s Paradox of the Arrow
That depends on your definition of "in motion." The sensible definition says velocity is nonzero if and only if the object is in motion. Zeno's definition of "in motion" isn't defined for a single instant.
Mar
8
revised Why don't black holes form from forces other than gravity?
edited tags
Mar
8
answered Zeno’s Paradox of the Arrow
Mar
8
reviewed Leave Open Zeno’s Paradox of the Arrow
Mar
8
reviewed Close Initial conditions of the origin of the universe
Mar
8
reviewed Close Find the minimum value of velocity
Mar
8
reviewed Leave Open Please explain C14 half-life
Mar
8
reviewed Leave Open Conduction and propagation
Mar
8
reviewed Leave Open Why do people with bigger hands/wrists have bigger torque advantages in arm wrestling?
Mar
8
comment Initial conditions of the origin of the universe
Gravity and matter were always there. The only thing that happened at age 300,000 is that matter changed from plasma to gas, thus becoming transparent to light.
Mar
7
comment What is the most stable nuclide of an isobar?
Note that this is precisely the ambiguity that results in both Fe-56 (mass) and Ni-62 (binding energy) as being quoted as the most stable isotopes.
Mar
6
awarded  Reviewer
Mar
6
reviewed Approve Laser divergence/convergence over large distance