Sökning: "accretion"
Visar resultat 11 - 15 av 67 avhandlingar innehållade ordet accretion.
11. Unveiling a multiscale view of massive star and cluster formation
Sammanfattning : Massive stars regulate the physical and chemical evolution of galaxies. Most stars within these galaxies, including massive ones, appear to be born in star clusters and associations. However, many questions remain unanswered about how massive stars and clusters form from the diffuse gas of interstellar space. LÄS MER
12. The Formation of Giant Planets
Sammanfattning : Giant planets form embedded in a protoplanetary disc around a young star. Close to the midplane a large fraction of the available mass in solids is found in particles of cm to dm in size, which drift towards the star due to friction with the surrounding gas. LÄS MER
13. Unveiling a multi-scale view of massive star and cluster formation
Sammanfattning : Massive stars regulate the physical and chemical evolution of galaxies. Most stars within these galaxies, including massive ones, appear to be born in star clusters. However, there are many open questions about how these systems form from diffuse interstellar gas. LÄS MER
14. The formation and fate of planetesimals at planetary gap edges
Sammanfattning : High resolution observations with ALMA have revealed that concentric rings and gaps are common features in protoplanetary disks. The favored mechanism for creating these substructures are planet-disk interactions, in which growing planets open gaps in the disk, and particles become trapped at the pressure maxima that form at the corresponding gap edges. LÄS MER
15. Observations with Herschel: High-mass star formation and the search for NH+
Sammanfattning : The capture and interpretation of the electromagnetic radiation we receive from space is essential to our understanding of the cosmos. When the Earth's opaque atmosphere prevents the far-infrared radiation to reach ground based antennas, space observatories become crucial to collect that important piece of the large puzzle that otherwise would have been lost. LÄS MER
