Essays about: "Photometry"

Showing result 1 - 5 of 16 essays containing the word Photometry.

  1. 1. N-body simulations of exoplanets and their moons

    University essay from Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionen

    Author : Lydia Schollmeier; [2024]
    Keywords : Physics and Astronomy;

    Abstract : The planet-planet interactions in a many-planet system cannot be analytically calculated. Instead, they have to be investigated by using an N-body simulation. I discuss three questions about the N-body interactions in planetary systems: The first two are on the system 55 Cnc, a system with five known planets around a K-type star. READ MORE

  3. 2. Resolving the smallest scale of star formation at Cosmic Noon with JWST : Star-forming clumps in a galaxy lensed by Abell 2744

    University essay from Stockholms universitet/Institutionen för astronomi

    Author : Annalena Pless; [2023]
    Keywords : star formation; star-forming clumps; galaxy evolution;

    Abstract : At higher redshift galaxies exhibit increasingly irregular and clumpy morphologies, withstar-forming clumps dominating the FUV output of their host galaxies thus being inti-mately related to star formation and the formation and evolution of galaxies. This workexamines star-forming clumps in a remarkable, young spiral galaxy at Cosmic Noon witha redshift ofz= 2. READ MORE

  4. 3. Magnificent beasts of the Milky Way: Hunting down stars with unusual infrared properties using supervised machine learning

    University essay from Uppsala universitet/Observationell astrofysik

    Author : Julia Ahlvind; [2021]
    Keywords : machine learning; supervised machine learning; support vector machine; photometry; stars; stellar physics; astronomical archives;

    Abstract : The significant increase of astronomical data necessitates new strategies and developments to analyse a large amount of information, which no longer is efficient if done by hand. Supervised machine learning is an example of one such modern strategy. READ MORE

  5. 4. A Close Look at the Transient Sky in a Neighbouring Galaxy

    University essay from Luleå tekniska universitet/Rymdteknik

    Author : Kiran Tikare; [2020]
    Keywords : Astrophysical Transients; Optical Transients; Microlensing; Variable Stars; Andromeda Galaxy; Forced Aperture Photometry; Time Domain Astronomy; Sky Survey; Zwicky Transient Facility; Machine Learning; Big Data Science;

    Abstract : Study of the time variable sources and phenomena in Astrophysics provides us with important insights into the stellar evolution, galactic evolution, stellar population studies and cosmological studies such as number density of dark massive objects. Study of these sources and phenomena forms the basis of Time Domain surveys, where the telescopes while scanning the sky regularly for a period of time provides us with positional and temporal data of various Astrophysical sources and phenomena happening in the Universe. READ MORE

  6. 5. Properties of Near-Infrared Type Ia Supernovae Light Curves

    University essay from Uppsala universitet/Observationell astrofysik

    Author : Timothy Faerber; [2020]
    Keywords : Supernova; SNe Ia; Cosmology; Photometry; NIR;

    Abstract : As a result of the standardizability of SNe Ia light curves over a wide range of photometric bands, they are used as standard candles to accurately measure distances in the cosmos up to z ≈ 1 [22]. As dust extinction is smaller in the NIR than in the optical [21] there is less dispersion seen in the peak brightnesses of SNe Ia, making them truly standard candles. READ MORE