Essays about: "stars: grain size"

Found 3 essays containing the words stars: grain size.

  1. 1. Assessing the relationship between hypoxia and life on Earth, and implications for the search for habitable exoplanets

    University essay from Lunds universitet/Geologiska institutionen

    Author : Thomas Evan Smith; [2022]
    Keywords : hypoxia; hypoxia-inducible factors; atmospheric oxygen; multicellularity; embryogenesis; exoplanets; white dwarfs; oxygen fugacity; Earth and Environmental Sciences;

    Abstract : Atmospheric oxygen at the level of present-day Earth (21%) is generally regarded as permissive for the development and survival of complex multicellular life, such as animals. The hypothesis that oxic conditions are conducive for multicellular life has subsequently been applied to the search for life elsewhere in the universe, with planets exhibiting atmospheric oxygen of a similar level to Earth being considered as candidates for habitability. READ MORE

  3. 2. Influence of grain growth on the thermal structure of inner protoplanetary discs

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

    Author : Sofia Savvidou; [2018]
    Keywords : protoplanetary disc; thermal structure; hydrodynamical simulations; grain size distribution; grain growth; opacity; iceline; Physics and Astronomy;

    Abstract : Protoplanetary discs surround young stars for the first few million years after their formation and they are the birthplaces of planetary systems. The thermal structure of the discs is regulated by their dust content and the opacity that it provides. READ MORE

  4. 3. Dust driven winds of cool giant stars : dependency on grain size

    University essay from Teoretisk astrofysik

    Author : Filip Jennerholm Hammar; [2011]
    Keywords : stars: AGB; stars: atmospheres; stars: carbon; stars: mass loss; stars: grain size; asymptotiska jättegrenen; kolstjärnor; stjärnor: massförlust;

    Abstract : Aim. In this project, theoretical models of dust driven winds of asymptotic giant branch (AGB) stars with effective temperatures within a range of 2400 − 3200 [K] and relative carbon-to-oxygen abundance C/O > 1 are studied. READ MORE