| Staff: U. Klein | Date of class: Tu 16 ct, Th 16 ct |
ID: 6569, astro841 | Location of class: AIfA, 0.05 |
Exercises: Wed 9 a.m. Thu 3 p.m. |
Literature: Lecture Notes
Rohlfs & Wilson
Tools of Radio Astronomy
Springer |
Description: "Radio Astronomy: Tools, Applications & Impacts"
Who: U. Klein
When: Winter term, Tuesday 4:15 p.m., Thursday 4:15 p.m.
Where: AIfA, HS 0.03
This lecture is supposed to be attended by students studying main courses. Successful participation of the course on Electrodynamics is a prerequisite, otherwise, elementary courses in physics and mathematics are required. A successful participation in this class means 3 academic hours of lecturing per week, plus participation in the associated lab course. The latter usually takes place after the winter term (in a block).
Note that for students in the Master of Astrophysics programme perform this lab course as part of the advanced lab.
Any students who envisage a thesis in radio astronomy are strongly recommended to attend this lecture! In what follows a syllabus of the lecture is given, which is still subject to changes since it had to be 'glued together' from previously two courses.
1. Introduction
history
astrophysics and radio astronomy
2. Single-dish telescopes
Cassegrain and Gregory foci
geometries and ray tracing
antenna diagrams
antenna parameters
3. Fourier optics
Fourier transform
aperture - farfield relations
spatial frequencies and filtering
power pattern
convolution and sampling
resolving power
4. Influence of earth's atmosphere
ionosphere, troposphere
plasma frequency
Faraday rotation
refraction, scintillation
absorption / emission
radiation transport
5. Receivers
total-power and heterodyne systems
system temperature
antenna temperature, sensitivity
Dicke-, correlation receiver
amplifiers
hot-cold calibration
6. Wave propagation in conductors
coaxial cables, waveguides
matching, losses
quasi optics
7. Backend
continuum, IF-polarimeter
spectroscopy
filter spectrometer
autocorrelator
acousto-optical spectrometer
pulsar backend
8. mm and submm techniques
telescope parameters and observables
atmosphere, calibration, chopper wheel
error beam
SIS receivers
bolometers
9. Single-dish observing techniques
on-off, cross-Scan, Raster
continuous mapping, OTF, fast scanning
frequency-switching, wobbling technique
10. Data analysis
sampling theorem
spectroscopy
multi-beam observations
image processing, data presentation
11. Interferometry basics
aperture - image plane
complex visibility
delay tracking
fringe rotation
sensitivity
12. Imaging
Fourier inversion
cleaning techniques
self-calibration
zero-spacing correction
13. VLBI
station requirements
processor
calibration and imaging
retarded baselines
geodesy
14. Spectroscopy
XF and FX correlation
data cubes
15. Polarimetry
cross dipoles
circular feeds
spurious polarization
16. Future developments and science
projects, telescopes
LOFAR, SKA, ALMA, SOFIA, Planck
impacts: ISM, IGM, cosmology ...
|
| Staff: U. Klein | Date of class: Donnerstag, 10:00 |
ID: physik541 | Location of class: HS 0.05 |
Exercises: |
Literature: |
Description: Lernziele der LV:
Die Studierenden sollen lernen, Publikationen effizient vorzubereiten und optimal (Berücksichtigung der Zielgruppe) zu gestalten. Sie sollen lernen, Vortraege vorzubereiten, die zu behandelnden Themen zielgruppengerecht einzuteilen und didaktisch zu gestalten
Inhalte der LV:
Texte: an welche Leser richtet sich der Text?; Textteile: Einleitung, Messdaten, Reduktion, Analyse, Resultate, Wichtigkeit der Teile; Unterschiede zwischen Veroeffentlichung, Antrag und Tagungsabstrakt; Einteilung in Abschnitte, Unterabschnitte und Paragraphen; Struktur der jeweiligen Oeffnungssaetze; Relative Bedeutung von Tabellen, Abbildungen und Abstrakt; Vorgehensweise bei Textabfassung; Gestaltung von Abbildungen; Begutachtungsprozess, Beispiele.
Vortrag: Vortragsstruktur, Foliengestaltung, Einteilung einer Folie und Verwendung von Farben; Quellenangaben; zeitliche Abfolge; Koerperhaltung beim Vortrag; Atemtechnik und Stimmvolumen; Verwendung einer Tafel; Zeigestock oder pointer; Laptop; Pausen beim Sprechen; Vermeidung von Bindewoertern.
Gelegenheit zum Vortrag |
| Staff: U. Klein | Date of class: Mo 9 ct |
ID: 6933, astro822 | Location of class: AIfA, 0.03 |
Exercises: to be arranged |
Literature: M.S. Longair: High Energy Astrophysics, Vol. 1+2 (Cambridge University Press, 2008)
S. Rosswog, M. Brüggen: Introduction to High-Energy Astrophysics (Cambr. Univ. Press, 2009)
L. Spitzer: Physics of Fully Ionized Gases (Dover Publications , 2006)
Lecture Notes (U. Klein) |
Description: Magnetic fields in the ISM and IGM
Who: U. Klein
When: Summer term, Monday 9:15 a.m.
Where: AIfA, HS 0.03
Lecture Outline
1. Introduction
2. Radiation processes
- Free-free radiation
- Synchrotron radiation
- Inverse-Compton radiation
- Spinning dust grains
3. Diagnostics
- Optical polarisation
- Synchrotron radiation
- Faraday rotation
- Zeeman effect
- polarised dust emission
4. Milky Way
- Diffuse ISM
- Molecular clouds and star-forming regions
- Supernova remnants
- acceleration of cosmic rays
5. External galaxies
- Spiral galaxies
- Dwarf irregular galaxies
- Elliptical galaxies
- Containment of particles and fields
- Galactic dynamo
6. Active Galactic Nuclei
- Radio galaxies
- Quasars
- Seyfert galaxies
- Origin of magnetic fields
7. Intergalactic magnetic fields
- Clusters of galaxies
- Radio halos
- Radio relics
- Mini-halos
- Magnetisation of the IGM
- Cosmological shacks
8.Cosmological magnetic fields |