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Showing result 6 - 10 of 18 essays matching the above criteria.

  1. 6. 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

  3. 7. Testing the multi-epoch luminosity function of asymptotic giant branch stars in the Small Magellanic Cloud with VISTA

    University essay from Uppsala universitet/Institutionen för fysik och astronomi

    Author : Róisín O'Rourke Brogan; [2020]
    Keywords : stars: AGB; stars: late-type; stars: atmospheres; stars: variable; small magellanic cloud; magellanic system; stellar populations; model stellar populations; dwarf galaxies;

    Abstract : The physics pertaining to the asymptotic giant branch (AGB) phase of stellar evolution has been studied for many years. However, the mechanics behind many characteristics displayed at this stage are still not fully understood. READ MORE

  4. 8. Study of the in-flight calibration of theSVOM/ECLAIRs instrument

    University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Author : Jakob Östberg; [2020]
    Keywords : Telescope; calibration; gamma-ray; burst; ECLAIRs; SVOM; IRAP;

    Abstract : The Space based multi-band Variable astronomical Object Monitor (SVOM) is a x- andgamma-ray telescope with the primary objective of observing gamma-ray bursts. Themission is a cooperation between the French and Chinese space agencies and will be launchedin 2021. READ MORE

  5. 9. Do variations in the initial mass function affect galaxy evolution?

    University essay from Lunds universitet/Astronomi - Genomgår omorganisation; Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation

    Author : Mateo Prgomet; [2020]
    Keywords : galaxy; galaxy formation; galaxy evolution; feedback; star formation; ultra faint dwarf galaxy; initial mass function; variations; universe; redshift; hydrodynamics; cosmology; zoomed-in simulations Galaxy formation and evolution; galaxy feedback; stellar feedback; IMF variations; cosmological zoomed-in simulations; Physics and Astronomy;

    Abstract : The initial mass function (IMF) describes the stellar mass distribution for a population of stars at birth. This parameter represents a topic of long standing discussion within astronomy due to its apparent insensitive nature to environmental conditions. However, in the last decade, significant evidence suggesting the contrary has been presented. READ MORE

  6. 10. Pulsation Properties in Asymptotic Giant Branch Stars

    University essay from Uppsala universitet/Teoretisk astrofysik

    Author : Ofelia Norgren; [2019]
    Keywords : Astronomy; Asymptotic Giant Branch stars; Stellar Evolution; Variable Stars; Power Spectrum;

    Abstract : Asymptotic Giant Branch (AGB) stars are stars with low- to intermediate mass in a late stage in their stellar evolution. An important feature of stellar evolution is the ongoing nucleosynthesis, the creation of heavier elements. READ MORE