24,614 reputation
45492
bio website
location Princeton, NJ
age 25
visits member for 2 years, 6 months
seen 5 mins 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.


Aug
3
comment Space expanding, or light slowing down?
While it is true that $c$ is constant as far as anyone can measure, and while part of the evidence comes from distant objects, this statement leaves something to be desired - namely how this measurement is done. It is in fact a nontrivial astronomical measurement, since you can't just go to a distant galaxy in the past and measure the speed of light there. Even spectroscopy runs into problems if all you can see is, say, the Balmer series.
Aug
3
comment What are physical effects that could be employed to emulate this system?
This seems wayyyy too contrived to match nature. There aren't many physical systems that match tree structures I can think of (and certainly there are no self-similar hierarchies more than a few levels deep), and the added requirement of having the data stored in the node reference the tree structure itself - that's just asking for too much. Maybe biology could cook up something where tree depth corresponds to a signalling chemical concentration, but that's still a huge stretch.
Aug
3
reviewed Close Can we create a small black hole?
Aug
3
comment how does international space station change its orientation?
@Hash Note that as written this is borderline on topic for this site (the physics of space maneuvers is on topic, but engineering implementation details are generally not). However, this is the perfect sort of question for the new Space Exploration site, so if you have future questions like this you may also want to consider asking there.
Aug
2
answered Why is the radial direction the preferred one in spherical symmetry?
Aug
2
comment Are elliptical orbits really elliptical?
@Wutaz Unless you put in the general relativity yourself ;) I assure you the simulation is not able to compute apsidal precession. That's just an example of how one can get a similar phenomenon using different laws of physics. The only "tiny deviations" in pure Newtonian mechanics are the result of (1) other bodies in the system or (2) the bodies not being perfect, rigid spheres.
Aug
2
answered Are elliptical orbits really elliptical?
Aug
2
reviewed Close Is there a star catalog for download?
Aug
2
reviewed Leave Open Lay explanation of the special theory of relativity?
Aug
1
comment What highest amount of energy can we get from a laser?
Ummm, a laser has exactly as much energy as you put in, like a light bulb. It is certainly not a source of energy. Perhaps you could clarify what you mean?
Aug
1
revised meteorites wiki excerpt
added 107 characters in body
Aug
1
revised meteorites wiki description
added 317 characters in body
Aug
1
comment Is there a star catalog for download?
This request is pretty unspecific. How deep do you need the catalog (and are you measuring by magnitude or distance)? Will partial sky coverage suffice?
Jul
31
comment Can gravity be shielded, like electromagnetism?
The second paragraph is a bit misleading. Yes, dark energy can be said to "repel," but this is due to it having a negative pressure; it's energy density is still very much positive. In terms of some standard energy conditions, it saturates null, weak, and dominant, and it only violates strong. [Warning: The rest of that wiki article contains some rather blatant factual inaccuracies itself; I suggest not relying on the other sections.]
Jul
31
revised Is there any theory for origination of charge?
fixed grammar; retagged
Jul
31
reviewed Edit and Reopen Can electromagnetic radiation (i.e. photons) produce gravity?
Jul
31
revised Can electromagnetic radiation (i.e. photons) produce gravity?
retagged
Jul
31
reviewed Approve mssm tag wiki excerpt
Jul
31
reviewed Approve mssm tag wiki
Jul
31
reviewed Approve Calculating an expression for the trace of generators of two Lie algebra