Essays about: "Accretion"

Showing result 6 - 10 of 62 essays containing the word Accretion.

1. 6. Black Holes of the First Stars

   University essay from Uppsala universitet/Institutionen för fysik och astronomi

   Author : Aron Kordt; [2022]
   Keywords : ;

   Abstract : In this report, we constrain properties of foreground objects in the Milky Way that have the potential of being confused with accretion disks of Population III stellar- mass black holes at high redshift. Following Windhorst et al. (2018), a model for multicolour accretion disks of Population III stellar-mass black holes is presented. READ MORE

3. 7. Starbursts at Cosmic Dawn : Formation of Globular Clusters, Ultra-Faint Dwarfs, and Population III star clusters at z > 6

   University essay from Stockholms universitet/Institutionen för astronomi

   Author : Olof Nebrin; [2022]
   Keywords : Cosmology; Galaxy Formation; Globular Clusters; First Stars; Dark Matter; Cosmic Dawn; Reionization; Ultra-Faint Dwarfs;

   Abstract : 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. READ MORE

4. 8. Effects of cover crops on nitrous oxide (N2O) emissions in cereal cropping

   University essay from SLU/Dept. of Ecology

   Author : Khadija Aziz; [2022]
   Keywords : cover crops; nitrous oxide; C sequestration; greenhouse gases; off-season emissions; freeze-thaw cycles;

   Abstract : More than 60% of anthropogenic nitrous oxide (N2O) emissions are attributed to agricultural activities. N2O production in soils highly depends on the N availability along with other factors such as soil moisture content, which provide suitable conditions for nitrification and denitrification. READ MORE

5. 9. Disruptive external forces as a catalyst for service innovation : Influencing forces of facility service innovation processes due to changing customer behavior

   University essay from Karlstads universitet/Handelshögskolan (from 2013)

   Author : Stina Hedman Nilsson; Carolina Skarin; [2022]
   Keywords : Service Innovation process; Service Innovation; External Forces; Disruptive External Forces; Changing Customer Behavior; Facility Service Sector;

   Abstract : Service innovation is an important component for service business through its applicability in development and accretion that promotes business operations. The service innovation process can be created and maintained through interaction between the actor and the customer, where mutual value is being created through collaboration. READ MORE

6. 10. Colliding Galaxies in a (Nut)Shell

   University essay from Lunds universitet/Astronomi - Genomgår omorganisation; Lunds universitet/Fysiska institutionen

   Author : Jonathan Petersson; [2022]
   Keywords : shell galaxies; simulations; starbursts; quenching; mergers; Physics and Astronomy;

   Abstract : Galaxy interactions and mergers are natural recurring events in the current cosmological paradigm, events that often coincide with starbursts and enhanced star formation activity. To understand why that is, one can use idealised (non-cosmological) merger simulations, which provide freedom to recreate specific tidally distorted galaxies, and analysis of the time evolution and underlying physics of the star formation activity at a high spatial resolution. READ MORE