uu.seUppsala University Publications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Study of melting and differentiation in iron meteorite parent bodies: How ambient temperature and abundance of 26Al affect accretion times
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
2016 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

This bachelor thesis consists of two parts. The first part consists of a review of the theoretical background. It starts off with a shorter review on theories of the history of the early Solar System, from protostellar evolution to grain agglomeration. This is then followed by a brief summary of different kinds of meteorites, what their origins might be and the radiometric dating techniques used to determine their ages.

The second part of the thesis consists of an investigation of the possible forming times of the early planetesimals by computer simulation. These planetesimals can later become the parent bodies for iron-rich meteorites. Factors studied are ambient temperature and the abundance of the short-lived radioactive isotope 26Al in the forming nebula.

The study found that the parent bodies of iron meteorites had to accrete within the first few million years after the earliest solids in the Solar System, the CAI. It also found that changes in the studied boundary conditions did extend this period, but not further than around 2.8Myrs compared to the standard 2.1Myrs.

This data compares well to other, similar, studies.

Abstract [sv]

Denna kandidatuppsats består av två delar. Först sammanfattas teorier om hur solsystemet tros ha formats, från hur solens närområde kan ha sett ut till hur de första himlakroppsembryona kan ha börjat formas. Detta följs av en kortare sammanfattning av olika typer av meteoriter och var de kan ha kommit från. Dessutom sammanfattas några tekniker som används för att bestämma åldern på dessa meteoriter.

Huvuddelen av uppsatsen består av en undersökning av hur och när de kroppar järnrika meteoriter kommer från kan ha bildats med hjälp av en datorsimulering, och hur olika parametrar såsom temperatur och mängd radioaktiva isotoper kan ha påverkat denna tid.

Undersökningen kom fram till att himlakropparna måste ha bildats snart, inom ca 2 Mår, efter de tidigaste kända delarna av vårt solsystem, CAI. Förändringar i de undersökta parametrarna kunde ändra denna tid något, men inte till senare än ca 2.8 Mår efter CAI.

Detta stämmer väl med andra, liknande, studier.

Place, publisher, year, edition, pages
2016. , 20 p.
Series
FYSAST, FYSKAND1054
Keyword [en]
Iron meteorites, accretion, differentiation, 26Al
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:uu:diva-297065OAI: oai:DiVA.org:uu-297065DiVA: diva2:940734
Educational program
Bachelor Programme in Physics
Supervisors
Examiners
Available from: 2016-06-21 Created: 2016-06-21 Last updated: 2016-06-21Bibliographically approved

Open Access in DiVA

Study of melting and differentiation in iron meteorite parent bodies(1113 kB)48 downloads
File information
File name FULLTEXT01.pdfFile size 1113 kBChecksum SHA-512
d3edfdf1f324c4807024ce10a393f9415edddea855240f4fdb1c741e80988f441f6364382f0ccf07116e1856ce403e8d22dde6ded80267923f3236fc95587e11
Type fulltextMimetype application/pdf

By organisation
Department of Physics and Astronomy
Astronomy, Astrophysics and Cosmology

Search outside of DiVA

GoogleGoogle Scholar
Total: 48 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 220 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf