PLANETS AND EXOPLANETS

Course objectives

GENERAL OBJECTIVES: This module provides an introduction to the topics of detection and characterisation of planets orbiting stars other than the Sun. Current theories of planetary formation and evolution are also reviewed. Until 20 years ago, planets of our Solar System were the only known bodies orbiting a star. Today we know that on average every star in the Galaxy has at least one planet. Exoplanets present a diversity in their physical parameters that it is not observed in the Solar System. This present new challenges to modern Astrophysics in order to answer questions about planet formation and evolution, and about the uniqueness of our Solar System in the Galaxy. This module is for those students interested in acquiring an understanding of the field through the knowledge of observational and data analysis techniques used, the interpretation of the experimental evidences, and by reviewing current theories of planet formation and evolution. SPECIFIC OBJECTIVES: A - Knowledge and understanding OF 1) To introduce the theoretical concepts of planet formation and evolution OF 2) To describe our Solar System as a reference case OF 3) To discuss current research in exoplanetary science OF 4) To describe the main challenges arising from exoplanetary observations OF 5) To introduce observational and statistical methods applied to the detection of exoplanets and remote sensing of their atmospheres OF 6) To describe the current and future astronomical facilities for the detection and characterisation of the exoplanet population in the Solar System neighborhood B - Application skills OF 7) Ability to understand and apply the most common data and scientific analysis techniques used in the field OF 8) Ability to understand and critically evaluate scientific literature C - Autonomy of judgment OF 9) To be able to integrate the knowledge acquired in order to apply them in the more general context of planetary sciences. D - Communication skills OF 10) To be able to review scientific literature to peers E - Ability to learn OF 11) Ability to read scientific papers in order to further explore some of the topics introduced during the course.

Channel 1
ENZO PASCALE Lecturers' profile

Program - Frequency - Exams

Course program
1) Introductory framework to the study of planets and exoplanets - Observations and statistics - Orbital parametrisation. - Energy balance, albedo, planet-star flux ratios, light curves and phase curves. 2) Direct and indirect detection methods - Radial velocities, transits, TTV, astrometry, microlensing, pulsar timing, direct imaging. - Observational challenges, systematics and biases - Review of past, current and future instrumentation for exoplanet detection 3) Elements of planet formation and evolution theories - Protoplanetary disks (structure, dynamics and chemical abundances). - Formation of giant planets, Earths and Neptunes. Satellites. - Planetary migration. Orbital motion and spacing. Orbital resonances, planetary rotations and tidal locking mechanism. - Planetary masses and bulk compositions - Observational evidences and challenges 4) Composition and evolution of planetary atmospheres - Earth, Venus and Jupiter - Primordial atmospheres and their evolution through photochemical, escape, impact enrichment, volcanic and sink processes. Evolved atmospheres. - Elements of cloud formation, winds, energy redistribution. - Giant planets and their link with brown dwarf 5) Observational techniques to detect and characterise exoplanet atmospheres - Transit spectroscopy, spectroscopically resolved phase curves, eclipse mapping. - Direct imaging spectroscopy - Experimental challenges and biases. HST, Spitzer and JWST. Ground instrumentation. 6) Remote sensing of the atmospheres - Fundamentals of radiative transfer applied to the observing geometry - Scattering (Mie and Rayleigh). Molecular absorption cross section. Condensate opacities. - Vertical structures of planetary atmospheres. Hydrostatic equilibrium and scale height. Temperature inversion and the stratosphere. Circulation. - Our Solar System: a case study - Atmospheric bio-signatures
Prerequisites
None
Books
1) Seager, S. Exoplanet Atmospheres. Princeton University Press 2) Goody, R. M. and Yung, Y. L. Atmospheric Radiation. Oxford University Press. 3) Perryman, M. The Exoplanet Handbook. Cambridge University Press 4) R. A. Hanel,‎ B. J. Conrath,‎ D. E. Jennings,‎ R. E. Samuelson, Exploration of the Solar System by Infrared Remote Sensing. Cambridge University Press. 5) Collection of recent research and review papers to be distributed in class.
Teaching mode
Class lectures Numerical Exercises
Frequency
not compulsory
Exam mode
The assessment involves: 1) Oral exam 2) Review of a science paper to be coordinated with the lecturer 3) Review of the numerical exercises assigned in class
Lesson mode
Class lectures Numerical Exercises
  • Lesson code10589158
  • Academic year2025/2026
  • CourseAstrophysics and Cosmology
  • CurriculumSingle curriculum
  • Year1st year
  • Semester2nd semester
  • SSDFIS/05
  • CFU6