Daily Study Log (2019-02-04)

Research Mass-Radius Relation of Neutron Stars I was having trouble with converting units from geometrical units to cgs units. But I found relations between them from the paper. But I need to separate central mass density from a central ‘energy’ density. I understood that they are definitely different, but I have to find a relation…

Daily Study Log (2019-02-03)

For the last two days, I didn’t do well about study and research. I had something else to deal with during the weekend. I should do more on weekdays. I’m so feeling bad when I put ‘None’s on my post. Research Mass-Radius Relation of Neutron Stars None Study Astronomy & Astrophysics None English I studied…

Daily Study Log (2019-02-02)

Research Mass-Radius Relation of Neutron Stars None Study Astronomy & Astrophysics I have read Astrobites article. It’s about dwarf galaxy simulations to explain bi-modal metallicity distribution. English I have studied 34 English words using Anki. I have added 1 English word, 17 sentences, 1 TOEFL essay, and 1 GRE issue essay in Anki. General Science None…

Daily Study Log (2019-02-01)

Research Mass-Radius Relation of Neutron Stars After a successful test of Polytrope n = 1 case, now I can move further to the next level. We decided to use RNS code for considering a more complicated case, I downloaded and build it. It is written in C. I wanted to find a text “eosA” in the…

Daily Study Log (2019-01-31)

Research Mass-Radius relation of Neutron Star I put some labels and titles in my graphs that obtained from Python code yesterday. Python is very intuitive so it’s easy to use. I wrote a code which calculates the Lane-Emden equation of n =1 case. This result has very similar behavior with my previous TOV solver result. I…

Daily Study Log (2019-01-30)

Research I have tested the validity of my Python code and it turned out that the code yields the correct answer for a simple case. I have plotted mass vs central density and mass vs radius of neutron stars using my code. I have found some references to understand my research. Study I have added…

Daily Study Log (2019-01-29)

Research Finally, I successfully wrote the Tolman-Oppenheimer-Volkoff (TOV) equation solver in Python. I’ve tested it and it looks really good. I’ll upload it on my Github after my master defense. Study I have studied 205 English words through Anki. I have read Nature Briefing, two Astrobites articles. Seeing supernova remnants in 3D would be quite…

Daily Study Log (2019-01-28)

Research Now I can look at the TOV solver example. It is written in Fortran 2008. Reading the code, I encountered the concept of a Jacobian matrix. I really should have studied mathematics further. I need to get equations for mass and density. The example code solves this using Jacobian, But I don’t fully understand…

Daily Study Log (2019-01-27)

Now I’m feeling well, I studied a little more than the previous three days. But it’s not enough. Research I have looked at my advisor’s Tolman-Oppenheimer-Volkoff (TOV) equation solver. I didn’t finish analyzing yet, so I didn’t compare with mine. I need to do this as soon as possible. Study I have studied 205 English…

Daily Study Log (2019-01-26)

I felt better than yesterday, so I could study a bit. Study I have added 3 new words and studied 205 English words using Anki. I have read two Nature Briefing and two Astrobites articles. It is very interesting that physicists found a hint of near-room-temperature superconductor! If we can develop the room-temperature superconductor, it…