Sökning: "M dwarf stars"
Visar resultat 1 - 5 av 6 uppsatser innehållade orden M dwarf stars.
1. Starbursts at Cosmic Dawn : Formation of Globular Clusters, Ultra-Faint Dwarfs, and Population III star clusters at z > 6
Master-uppsats, Stockholms universitet/Institutionen för astronomiSammanfattning : In the standard model of cosmology (ΛCDM) the first stars, star clusters, and galaxies are expected to have formed in short bursts of star formation in low-mass dark matter halos at high redshifts (). Up to this point, attempts to predict the properties and abundances of these luminous objects have made use of numerically expensive cosmological simulations. LÄS MER
2. The magnetic fields of exoplanet hostM-dwarf stars : The magnetic fields of exoplanet hostM-dwarf stars
L3-uppsats, Uppsala universitet/Teoretisk astrofysikSammanfattning : The majority of stars in the Milky Way are M dwarfs whichmake up 75 % of stars in the vicinity of the sun. As the magneticfield of stars can significantly affect the interiors and theatmospheres of the exoplanets they host within the stellar system,characterising this magnetic field is of major importance. LÄS MER
3. Forbidden oxygen in the Milky Way disk
Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisationSammanfattning : Oxygen is produced inside massive stars and dispersed into the interstellar medium mainly through type II supernovae explosions. This element, which is the third most abundant one in the Universe, plays an important role in tracing the Galactic chemical history and evolution. LÄS MER
4. Identification of elements and molecules in the spectra of an M dwarf star using high resolution infrared spectroscopy.
Kandidat-uppsats, Uppsala universitet/Institutionen för fysik och astronomiSammanfattning : M dwarfs are abundant and long-lived stellar objects. The formation of planets around stars in stellar systems is believed to be metallicity dependent. To determine the metallicity with synthetic spectrum analysis, the elements producing the absorption lines ofthe spectra first have to be identified. LÄS MER
5. Analyses of cool stars using molecular lines
Master-uppsats, Teoretisk astrofysikSammanfattning : M-dwarfs are the coolest type of hydrogen-burning stars, and three times as numerous as all other stars in the Galaxy combined. Thanks to their low masses, luminosities and surface temperatures, they are potentially the best targets for finding exoplanets capable of supporting life. LÄS MER