Syllabus

  • Syllabus (PDF)
  • Office hours: These will be in MAL 2058D on Wednesdays (1400-1500) and Thursdays (1300-1400).
  • TA Office hours: These are in the Reading room on Wednesdays (0900-1000) and in MAL 2068 on Fridays (0900-1000).

PSets and solutions

No. Topics Pset Due Solutions
0 Radiative Transfer PSet 1 Thursday, Sep 24


Course Outline

No. Date Topic Readings, Slides, and Notes In-Class Problems
1 - W1L1 2026/08/25 Introduction to A691; Intensity & Flux
01
2 - W1L2 2026/08/27 Radiation, Luminosity & Blackbodies 02
3 Opacity, extinction, cross-sections, and optical depth 03
4 Radiative Transfer Equation: absorption only 04
5 2026/09/08 Emission coefficient, source function. 05
6 Radiative Transfer Equation: general form & Solutions
  • Sample calculation of a toy, one-layer, stellar atmosphere
  • 06
    7 2026/09/15 Radiative Transfer Equation: applications
  • Sample calculation of a toy, one-layer, stellar atmosphere
  • 07
    8 2026/09/17 Energy, transitions, nomenclature: “bound-bound” reactions 08
    9 2026/09/22 Line broadening; Einstein As and Bs; atomic transitions
    10 2026/09/24 Molecular Transitions Seager, Sec. 8.2.2
    Stellar Interiors and Structure Crossfield, Chapter 15
    Stellar Interiors and Structure, continued
    Stellar Atmospheres: Plane-parallel atmosphere, Gray Atmosphere, Eddington Approximation Jura Radiation, Lecture 14
    Limb Darkening & Transits
    Stellar Chromospheres \& Coronae
    2026/10/15 Midterm Review
    2026/10/20 Midterm 1Formula & Constants
    Temperatures, Albedos, and Energy Balance
    Pressure Scale Height, Temperature Profiles Seager, Sec. 9.3
    Transmission Spectroscopy
    Convection & Convective stability
    Adiabats
    A Simple Greenhouse Model
    2026/11/19 MARAC conference
    Basic Atmospheric Circulation
    2026/11/26 No class - Thanksgiving holiday (observed)
    Radiative/advective timescales; Phase Curve formalism
    Global temperatures
    2026/12/10 Review (final lecture)
    FINAL EXAM 2026/12/18, from 0730-1000

    External Readings

    Exams and Projects

    Midterms:

    There will be one in-class exam during the semester, provisionally scheduled for Monday, October 20 (though stay tuned in case that date changes).

    Final:

    A comprehensive final exam will be taken on Friday, 18 December from 0730-1000.

    Talk review:

    You will turn in a one-page, double-spaced summary, review, and/or description of a professional astronomy talk that you saw in-person this semester. This could be a department colloquium, a department Astro-Space seminar, or a talk delivered through some other forum. This should not just be bullet points jotted down during the lecture, but rather should be a coherent narrative describing what was talked about and why it was important. Due on or before the last day of class.

    Journal Club:

    You will give a 10-minute presentation ("slideshow") to the class briefly summarizing an astronomy paper of your choice that was posted on arXiv during the semester.

    Presentation Rubric:

    The rubric that will be used for evaluating these presentations is online here.

    Schedule:

    Date Presenters Paper/topic
    2026/11/03 Varun Kore
    2026/11/12 Joey Discavage
    2026/11/27
    • Adly Ramsey>
    • Laura Wiese>
    • Terry Mechem
    2026/12/01
    • Nathaniel Sexton
    • Morgan Parton
    • Megan Weis
    2026/12/03
    • Isabella Estes
    • Bryan Williams
    • Katie Brotton
    2026/12/08
    • Kat Herink
    • Priya Bhakta
    • Ariana Fechter
    2026/12/10
    • Alex Leesman
    • Seth Milbourn

    BONUS: Fellowship Application

    An additional 10% of course grade (i.e., a full letter grade) is available to any student who writes a quality, submittable application for a major scholarship or fellowship (e.g. NSF GRFP, Goldwater, etc.). The application must be submitted to Prof. Crossfield at least one week before the official submission deadline (so he can give you feedback to help improve it). Drafts for fellowships due after the last day of class must be turned in one week before the last day of class. A large list of such fellowships is available at the KU Fellowships website.