Galaxies & Cosmology winter trimester  2006-07

 syllabus   &  course expectations

 Astronomy Picture of the Day        the latest astrophysics discoveries
  what's up in the 
sky this week       Skywatcher's Diary for this month

 
Monday,
February 19
Tuesday,
February 20
Wednesday,
February 21
Thursday,
February 22
Friday,
February 22
class
 
 
the end and the beginning 
 
 
reading
(always done before class)
 the pair-production and nucleosynthesis eras of the Big Bang:
29(2-4)
(a well-understood era)
when the forces were unified

29(1,5) 
 inflation and whence the universe

29(1, 7)
 
 



things you should know the answer to before coming to class

why did Big Bang nucleosynthesis take so long (a few minutes) to start?
(it was pretty hot and dense after all)?

why did Big Bang nucleosynthesis stop after only few hours?
(it was still hotter than inside the sun)?

see yesterday's questions

if the Big Bang formed helium, why didnt it form anything heavier?



questions we STILL havent answered include all the questions listed to the LEFT!

what is inflation?
why did it happen?




homework
(written assignments
to be turned in)


find the minimum temperature required for pair creation (aka pair production) of a particle/antiparticle pair of mass m
(in terms of m and constants of nature)

find the numerical values of this minimum temperature for an electron/positron pair...
for a proton/antiproton pair



web stuff
 

Distant quasars live in massive dark matter halos

the supernova of 386 identified

 from the meeting:  new evidence for past groundwater flows on Mars



 
"direct" proof of dark matter
 
 
lab
 
 
 
 
 
news & discoveries
 
 
 
 

   
  Monday,
February 12
Tuesday,
  February 13

Wednesday,
February 14

Thursday,
February 15

Friday,
February 16
class



work on projects
work on projects
reading
(always done before class)
28(7)

how does dark energy change the 3 types of universes we learned about friday?
28(7)
28(8)

plus questions below




things you should know the answer to before coming to class


I would suggest that you re-work the equations that we did friday until you can do all the algebra on your own, so that you know how one step follows from another




do you know the boundary lines
(in figure 28-19  ) -- any how they arise  -- that we have already discussed in class?

what about the ones that we haven't discussed yet in class?

and finally, what about the 3 different sets of observations that help locate our present universe on this diagram?
what are the observations, and why do their axes lie in the directions shown on the diagram?





homework
(written assignments
to be turned in)





web stuff





lab
have you decided and begun working on your final project?
need an email from you AND your partner
(that means if you are part of team, you and partner are in the from or cc part of the mail) about your last project to be presented on "finals day"
fix recent project deficiencies by tomorrow morning 9 am and hand in,
so i can take to s.f.
variable star projects
(but they don't look too fleshed out)

news/discoveries
of the week





   
  Monday,
February 5
Tuesday,
  February 6

Wednesday,
February 7

Thursday,
February 8

Friday,
February 9
class





reading
(always done before class)
27(7)
again
27(7)
on gamma-ray bursters



this time for sure!
read 1 (or 2) of

"Monsters Stars in the Early Universe"
S/T May 2006
(why only O/B star
formed in the early universe)

"How Galaxies Make Monster Black Holes"
S/T July 2006

"Magnetars"
SciAm Feb 2003

"Outrageously Magnetic X-ray Pulsars"
S/T Jan 2005

on reserve in the library

28(1-4)
28(6 ONLY)"
cosmology before 1999
things you should know the answer to before coming to class


what are gamma-ray bursters?


what are homogeneity, isotropy?

what is Olber's paradox and how is it resolved?

what are the possible futures of the universe?

what other properties are associated with the different universe futures?

homework
(written assignments
to be turned in)
calculation of the Eddington limit
(with numbers)




web stuff

the truth about magnetars



lab


projects due


news/discoveries
of the week






  Monday,
January 29
Tuesday,
  January 30

Wednesday,
January 31

Thursday,
February 1

Friday,
February 2
class





reading
(always done before class)

27(1-4)
27(6)

27(7)
things you should know the answer to before coming to class

know what quasars, Seyfert galaxies, blazars, and radio galaxies do

what types of radiation/spectrum do they emit?
what does that tell us about the state of matter?    what special properties do they have?  where are the big mistakes the book made?

how does the model for the AGN phenomenon explain all the various objects in the box to the left



what are gamma-ray bursters?

how are they related to the AGN objects which occupy the previous parts of the chapter?

homework
(written assignments
to be turned in)




dimensional analysis:
find the correct expression for othe "radius" of the electron.
Assume that it depends on the constants c and k
(speed of light and Coulomb's electrical constant) and electron properties (m and q)

evaluate the electron radius numerically...

assuming that the radius of the proton obeys the same formula, what does that say about the size of the proton?
web stuff





lab





news/discoveries
of the week






galaxies and cosmolgy january pages
galaxies and cosmolgy november/december pages

  astrophysics trimester 1 pages