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-------------- We begin with the DIFFUSE ISM ----------------
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Basics |
See this for basic course info, and
see this (intro_ism.ps) for Carl's personal
intro to the ISM. For a more general global summary of current
knowledge and research for the ISM, read, in
entirety,
this wonderful overall ISM review by Katia Ferriere in 2001 RMP
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Tue Jan 22 |
Summarize Katia's review. Start on HII Regions:
sections 1, 2.1, 2.2 in HII Outline .
See this (08read1.216) for General reading on HII Regions
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Reading |
See "week1-notes",
"week2-notes",
"week3-notes"
for some older notes on details of what we're
covering on HII regions. These three documents contain the physical
essence of HII region physical conditions and observable radiation.
Our treatment of HII regions begins
with section 4 in "week3-notes" and we then cover the others.
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Problem |
This problem set 1 is due Thu, Jan 31
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Thur Jan 24 |
section 2.2 in
HII Outline, covering continuum emission
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Problem |
This problem set 2 is due Thur, Feb 14
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Reading |
See this for Galactic radius abundance
gradient from radio, optical, IR lines in HII regions
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Tue Jan 29 |
section 2.3 in
HII Outline, which covers HII region recombination lines, heating, cooling
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Reading |
See this for General reading on
fronts and the dynamics of PDRs
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Reading |
See this for a brief description of
C and J shocks
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Thur Jan 31 |
section 2.3 in HII Outline, which
covers temperatures of HII regions, collisionally excited heavy-element lines
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Tue Feb 05 |
No class--Carl's away
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Thur Feb 07 |
No class--Carl's away
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Tue Feb 12 |
section 2.3 in HII Outline, OIII,
Using forbidden lines as densitometers and thermometers in HII regions,
radio recombination lines, abundances
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Reading |
BEFORE NEXT CLASS, read my
notes on grain basics
A list of excellent textbook reading and reviews
is here.
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Thur Feb 14 |
Grains I
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Tue Feb 19 |
Grains II
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Reading |
In Grains III we discuss grain evolution in the Galactic environment. A
magnificent article by Bruce Drain, 'Interstellar Dust Models and
Evolutionary Implications' is
is here.
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Tue Feb 21 |
Grains III
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Problem |
This problem set IRDUST on IR emission
from dust is due Thur, Mar 07
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Tue Feb 26 |
Shocks and Fronts I
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Thur Feb 28 |
Shocks and Fronts II
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Tue Mar 05 |
Shocks and Fronts III
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Reading |
See this for General reading on WIM
For discussion in the next class read, in
entirety,
this wonderful WIM review by Matt Haffner et al, to appear in
2009 RMP
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Thur Mar 07 |
slide show on what real HII regions look like; radiation pressure,
magnetic fields, complicated structure. It's
here.
Also, we will begin covering the WIM by going over the Haffneer review.
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Tue Mar 12 |
Pulsar dispersion WHAM. distribution of WIM in the Galaxy--with z, with
R, correlation with star formation. sections 1, 2, 3, 4, 6 of WIM Outline
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Thu Mar 14 |
Interstellar Scintillation Sections 5 and 7 in WIM Outline
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Suppl Notes |
These supplementary notes on PDRs discuss
heating, cooling, H2 formation, and clumping---emphasizing the
transition zone between fully atomic and fully molecular
regions. We will very briefly summarize for the next class, and cover
more throughout the remainder of the course.
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Tue Mar 19 |
Extreme Scattering Events. Scattering measure and its distribution inthe
Galaxy. NEW TOPIC: The Neutral Media. Begin with a brief description of
PDRs.
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Thu Mar 21 |
Neutral media: ionization state, cooling, heating, equilibrium temp.
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Problem |
This problem set on Carbon is
due Thursday, April 4.
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READING: SUPPL NOTES |
These supplementary notes on Radiative
Transfer discuss excitation and radiative transfer--like the
21-cm line discussion in the next class, but more generally for molecules
and the non-collisionally-dominated case of resonance lines.
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-------------- SPRING BREAK --------------------------------------------------
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Tue Apr 2 |
Photoelectric heating by dust. Equilibrium temperatures for the CNM. The
two-phase model.
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Wed Apr 03 (makeup) |
21-cm line eqn of transfer, observations of NM temp: the
CNM and WNM. Statisistics of the CNM/WNM and neutral media in the Galactic
plane.
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Reading |
See this for General reading on neutral
atomic diffuse ISM
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Thu Apr 4 |
Excitation temps of a 2-level system in the general case. Escape
probability formalism. Heavy-element absorption lines in the ISM
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Problem |
This problem set on physical conditions
from optical/UV absorption lines is due Tuesday, April 16
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Tue Apr 9 |
Hot Ionized Medium: ROSAT X-ray maps. The Local Bubble. UV absorption lines from Li-like
elements like OVI. Cooling mechanisms.
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READING |
See this for General reading on the
HIM and blastwaves. Then there's The Trouble with the
Local Bubble (Welsh & Shelton 2009) ,
the most recent and totally surprising development in the HIM. Also, reread the 2 pages of section IIIE of
Katia Ferriere's ISM review in 2001 RMP
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Thur Apr 11 |
Blastwaves. Stellar winds. Superubbles and supershells. Chimneys.
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Tue Apr 16 |
magnetic fields in the ISM I. See also some ppt/pdf files:
Why Magnetic Fields Matter in
Astrophsics: Solar flares, dynamos, Parker instability,
Magneto-Rotational Instability, Star formation.
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Wed Apr 17 (makeup) |
magnetic fields in the ISM II.
Methods: Faraday Rotation,
Zeeman splitting, Aligned grains, Chandrasekhar-Fermi, Goldreich-Kylafis,
Synchrotron emissivity.
Stokes parameters, and the
total confusion regarding definitions of SIGN.
A compilation of recent results on scales
from sub-pc to Megapc. This is a ppt file so you can see the 'blinking'.
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Thur Apr 18 |
Finish Magnetic fields recent results. Also: Observational results
on all phases of the diffuse medium, including HI structure from the
GALFA survey. This is another powerpoint presentation.
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READING |
We referred to these Suppl Notes on PDRs above. They discuss
heating, cooling, H2 formation, and clumping---emphasizing the
transition zone between fully atomic and fully molecular
regions. We will cover these notes in some detail for the next few
classes.
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Problem |
This problem set on CO mm-wave lines and
radiative transfer is due Thursday, April 25
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Tue Apr 23 |
PDRs I
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Thur Apr 25 |
PDRs II
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Thu Apr 30 |
models of the ISM
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Reading |
Al Glassgold will cover three of his excellent lectures on molecular
chemistry (see below). It would be desireable to peruse his others,
especially
Lecture 17 Global perspective of
molecular spectroscopy ;
Lecture 18 Rotational/vibrationaal
spectra of polyatomic molecules
Lecture 19 The all-important H2
and CO molecules
more of Lecture 19 (it's a big
subject!)
Lecture 24 CO observations; elements of
Physical properties of molecular clouds
Molecular clouds, clumps, and cores
Stability of molecular clouds:
fragmentation, virial theorem, magnetic fields
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Thur May 02 |
Lecture 20 -- Three special molecules:
OH, H2, and NH3, lecture by Al Glassgold
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Tue May 07 |
Lecture 21 -- Introduction to
interstellar chemistry, lecture by Al Glassgold
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Thu May 09 |
Lecture 22 -- Molecular ions and
their chemistry; fractionation, lecture by Al Glassgold
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-------------- THAT'S ALL, FOLKS!! --------------------------------------------------
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-------------- THAT'S ALL, FOLKS!! --------------------------------------------------
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Tue Mar 30 |
PDR intro; Neutral Medium I (cooling, heating, temp, 2 phases;
macroscopic heating processes and SN shocks):
sections 0,1,2,3 in NM Outline
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Thu Apr 01 |
PDR intro; Neutral Medium II (continue I above)
sections 0,1,2,3 in NM Outline
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Tue Apr 06 |
Neutral Medium II (21-cm line excitation and radiative transfer):
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READING |
See this for the magnificent revied
summary of the two-phase model versus turbulence by
Enrique V´azquez-Semadeni (title: 'Are there Phases in the ISM?'
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IMPORTANT READING |
We have too little time for fundamental consideratios regarding
supernovae, clustering, supershells and superbubbles, and
global models of the ISM. This
reading covers important
aspects of such
matters and you should take a look!
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IMPORTANT READING |
We have too little time for global models so do some prepatory
reading!
appropriate sections of
Don Cox's
2005 masterly review of ISM models. Also, read the section
VA and VC of
Katia Ferriere's ISM review in 2001 RMP
Also, read these quick notes by
ME! .
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READING FOR MOLECULES |
Also for molecules, I strongly
suggest you read parts of These supplementary
notes on Radiative Transfer : sections 1, 4, 6.1 as review;
section 6.2 (n_crit); section 7 (photon trapping), with particular
emphasis on beta (defined section 7.1, given for a slab equation 43).
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